/* Coordinator => Machine that initiates the transaction request call for commiting a transaction
* Participant => Machines that host the objects involved in a transaction commit */
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <pthread.h>
-#include <netdb.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <string.h>
+#include <netinet/tcp.h>
#include "dstm.h"
#include "mlookup.h"
#include "llookup.h"
#include "threadnotify.h"
+#include "prefetch.h"
+#include <sched.h>
#ifdef COMPILER
#include "thread.h"
#endif
+#include "gCollect.h"
+#include "readstruct.h"
-
-#define LISTEN_PORT 2156
#define BACKLOG 10 //max pending connections
#define RECEIVE_BUFFER_SIZE 2048
extern int classsize[];
+extern int numHostsInSystem;
+extern pthread_mutex_t notifymutex;
objstr_t *mainobjstore;
pthread_mutex_t mainobjstore_mutex;
+pthread_mutex_t lockObjHeader;
pthread_mutexattr_t mainobjstore_mutex_attr; /* Attribute for lock to make it a recursive lock */
-/* This function initializes the main objects store and creates the
+sockPoolHashTable_t *transPResponseSocketPool;
+
+/* This function initializes the main objects store and creates the
* global machine and location lookup table */
-int dstmInit(void)
-{
- mainobjstore = objstrCreate(DEFAULT_OBJ_STORE_SIZE);
- /* Initialize attribute for mutex */
- pthread_mutexattr_init(&mainobjstore_mutex_attr);
- pthread_mutexattr_settype(&mainobjstore_mutex_attr, PTHREAD_MUTEX_RECURSIVE_NP);
- pthread_mutex_init(&mainobjstore_mutex, &mainobjstore_mutex_attr);
- if (mhashCreate(HASH_SIZE, LOADFACTOR))
- return 1; //failure
-
- if (lhashCreate(HASH_SIZE, LOADFACTOR))
- return 1; //failure
-
- if (notifyhashCreate(N_HASH_SIZE, N_LOADFACTOR))
- return 1; //failure
-
- return 0;
+int dstmInit(void) {
+ mainobjstore = objstrCreate(DEFAULT_OBJ_STORE_SIZE);
+ /* Initialize attribute for mutex */
+ pthread_mutexattr_init(&mainobjstore_mutex_attr);
+ pthread_mutexattr_settype(&mainobjstore_mutex_attr, PTHREAD_MUTEX_RECURSIVE_NP);
+ pthread_mutex_init(&mainobjstore_mutex, &mainobjstore_mutex_attr);
+ pthread_mutex_init(&lockObjHeader,NULL);
+ if (mhashCreate(MHASH_SIZE, MLOADFACTOR))
+ return 1; //failure
+
+ if (lhashCreate(HASH_SIZE, LOADFACTOR))
+ return 1; //failure
+
+ if (notifyhashCreate(N_HASH_SIZE, N_LOADFACTOR))
+ return 1; //failure
+
+ //Initialize socket pool
+ if((transPResponseSocketPool = createSockPool(transPResponseSocketPool, DEFAULTSOCKPOOLSIZE)) == NULL) {
+ printf("Error in creating new socket pool at %s line %d\n", __FILE__, __LINE__);
+ return 0;
+ }
+
+ return 0;
}
-/* This function starts the thread to listen on a socket
- * for tranaction calls */
-void *dstmListen()
-{
- int listenfd, acceptfd;
- struct sockaddr_in my_addr;
- struct sockaddr_in client_addr;
- socklen_t addrlength = sizeof(struct sockaddr);
- pthread_t thread_dstm_accept;
- int i;
- int setsockflag=1;
-
- listenfd = socket(AF_INET, SOCK_STREAM, 0);
- if (listenfd == -1)
- {
- perror("socket");
- exit(1);
- }
- if (setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &setsockflag, sizeof (setsockflag)) < 0) {
- perror("socket");
- exit(1);
- }
+int startlistening() {
+ int listenfd;
+ struct sockaddr_in my_addr;
+ socklen_t addrlength = sizeof(struct sockaddr);
+ int setsockflag=1;
+
+ listenfd = socket(AF_INET, SOCK_STREAM, 0);
+ if (listenfd == -1) {
+ perror("socket");
+ exit(1);
+ }
+
+ if (setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &setsockflag, sizeof (setsockflag)) < 0) {
+ perror("socket");
+ exit(1);
+ }
#ifdef MAC
- if (setsockopt(listenfd, SOL_SOCKET, SO_NOSIGPIPE, &setsockflag, sizeof (setsockflag)) < 0) {
- perror("socket");
- exit(1);
- }
+ if (setsockopt(listenfd, SOL_SOCKET, SO_NOSIGPIPE, &setsockflag, sizeof (setsockflag)) < 0) {
+ perror("socket");
+ exit(1);
+ }
#endif
- my_addr.sin_family = AF_INET;
- my_addr.sin_port = htons(LISTEN_PORT);
- my_addr.sin_addr.s_addr = INADDR_ANY;
- memset(&(my_addr.sin_zero), '\0', 8);
-
- if (bind(listenfd, (struct sockaddr *)&my_addr, addrlength) == -1)
- {
- perror("bind");
- exit(1);
- }
-
- if (listen(listenfd, BACKLOG) == -1)
- {
- perror("listen");
- exit(1);
- }
+ my_addr.sin_family = AF_INET;
+ my_addr.sin_port = htons(LISTEN_PORT);
+ my_addr.sin_addr.s_addr = INADDR_ANY;
+ memset(&(my_addr.sin_zero), '\0', 8);
+
+ if (bind(listenfd, (struct sockaddr *)&my_addr, addrlength) == -1) {
+ perror("bind");
+ exit(1);
+ }
+
+ if (listen(listenfd, BACKLOG) == -1) {
+ perror("listen");
+ exit(1);
+ }
+ return listenfd;
+}
- printf("Listening on port %d, fd = %d\n", LISTEN_PORT, listenfd);
- while(1)
- {
- int retval;
- acceptfd = accept(listenfd, (struct sockaddr *)&client_addr, &addrlength);
- do {
- retval=pthread_create(&thread_dstm_accept, NULL, dstmAccept, (void *)acceptfd);
- } while(retval!=0);
- pthread_detach(thread_dstm_accept);
- }
+/* This function starts the thread to listen on a socket
+ * for tranaction calls */
+void *dstmListen(void *lfd) {
+ int listenfd=(int)lfd;
+ int acceptfd;
+ struct sockaddr_in client_addr;
+ socklen_t addrlength = sizeof(struct sockaddr);
+ pthread_t thread_dstm_accept;
+
+ printf("Listening on port %d, fd = %d\n", LISTEN_PORT, listenfd);
+ while(1) {
+ int retval;
+ int flag=1;
+ acceptfd = accept(listenfd, (struct sockaddr *)&client_addr, &addrlength);
+ setsockopt(acceptfd, IPPROTO_TCP, TCP_NODELAY, (char *) &flag, sizeof(flag));
+ do {
+ retval=pthread_create(&thread_dstm_accept, NULL, dstmAccept, (void *)acceptfd);
+ } while(retval!=0);
+ pthread_detach(thread_dstm_accept);
+ }
}
-/* This function accepts a new connection request, decodes the control message in the connection
+/* This function accepts a new connection request, decodes the control message in the connection
* and accordingly calls other functions to process new requests */
-void *dstmAccept(void *acceptfd)
-{
- int val, retval, size, sum;
- unsigned int oid;
- char *buffer;
- char control,ctrl;
- char *ptr;
- void *srcObj;
- objheader_t *h;
- trans_commit_data_t transinfo;
- unsigned short objType, *versionarry, version;
- unsigned int *oidarry, numoid, mid, threadid;
-
- transinfo.objlocked = NULL;
- transinfo.objnotfound = NULL;
- transinfo.modptr = NULL;
- transinfo.numlocked = 0;
- transinfo.numnotfound = 0;
-
- /* Receive control messages from other machines */
- if((retval = recv((int)acceptfd, &control, sizeof(char), 0)) <= 0) {
- printf("%s() Error: Receiving control = %d at %s, %d\n", __func__, control, __FILE__, __LINE__);
- pthread_exit(NULL);
+void *dstmAccept(void *acceptfd) {
+ int val, retval, size, sum, sockid;
+ unsigned int oid;
+ char *buffer;
+ char control,ctrl;
+ char *ptr;
+ void *srcObj;
+ objheader_t *h;
+ trans_commit_data_t transinfo;
+ unsigned short objType, *versionarry, version;
+ unsigned int *oidarry, numoid, mid, threadid;
+ struct readstruct readbuffer;
+ readbuffer.head=0;
+ readbuffer.tail=0;
+
+ /* Receive control messages from other machines */
+ while(1) {
+ int ret=recv_data_errorcode_buf((int)acceptfd, &readbuffer, &control, sizeof(char));
+ if (ret==0)
+ break;
+ if (ret==-1) {
+ printf("DEBUG -> RECV Error!.. retrying\n");
+ break;
+ }
+ switch(control) {
+ case READ_REQUEST:
+ /* Read oid requested and search if available */
+ recv_data_buf((int)acceptfd, &readbuffer, &oid, sizeof(unsigned int));
+ while((srcObj = mhashSearch(oid)) == NULL) {
+ int ret;
+ if((ret = sched_yield()) != 0) {
+ printf("%s(): error no %d in thread yield\n", __func__, errno);
}
-
- switch(control) {
- case READ_REQUEST:
- /* Read oid requested and search if available */
- if((retval = recv((int)acceptfd, &oid, sizeof(unsigned int), 0)) <= 0) {
- perror("Error: receiving 0x0 object from cooridnator\n");
- pthread_exit(NULL);
- }
- if((srcObj = mhashSearch(oid)) == NULL) {
- printf("Error: Object 0x%x is not found in Main Object Store %s, %d\n", oid, __FILE__, __LINE__);
- pthread_exit(NULL);
- }
- h = (objheader_t *) srcObj;
- GETSIZE(size, h);
- size += sizeof(objheader_t);
-
- if (h == NULL) {
- ctrl = OBJECT_NOT_FOUND;
- if(send((int)acceptfd, &ctrl, sizeof(char), MSG_NOSIGNAL) < sizeof(char)) {
- perror("Error sending control msg to coordinator\n");
- pthread_exit(NULL);
- }
- } else {
- /* Type */
- char msg[]={OBJECT_FOUND, 0, 0, 0, 0};
- *((int *)&msg[1])=size;
- if(send((int)acceptfd, &msg, sizeof(msg), MSG_NOSIGNAL) < sizeof(msg)) {
- perror("Error sending size of object to coordinator\n");
- pthread_exit(NULL);
- }
- if(send((int)acceptfd, h, size, MSG_NOSIGNAL) < size) {
- perror("Error in sending object\n");
- pthread_exit(NULL);
- }
- }
- break;
-
- case READ_MULT_REQUEST:
- break;
-
- case MOVE_REQUEST:
- break;
-
- case MOVE_MULT_REQUEST:
- break;
-
- case TRANS_REQUEST:
- /* Read transaction request */
- if((val = readClientReq(&transinfo, (int)acceptfd)) != 0) {
- printf("Error: In readClientReq() %s, %d\n", __FILE__, __LINE__);
- pthread_exit(NULL);
- }
- break;
- case TRANS_PREFETCH:
- do {
- if((val = prefetchReq((int)acceptfd)) != 0) {
- printf("Error: In prefetchReq() %s, %d\n", __FILE__, __LINE__);
- pthread_exit(NULL);
- }
-
- if((retval = recv((int)acceptfd, &control, sizeof(char), 0)) < 0) {
- printf("%s() Error: Receiving control = %d at %s, %d\n", __func__, control, __FILE__, __LINE__);
- pthread_exit(NULL);
- } else if(retval == 0) {
- printf("%s() Error: socket closed at the requesting side\n");
- pthread_exit(NULL);
- }
-
- } while (control == TRANS_PREFETCH);
-
- break;
- case TRANS_PREFETCH_RESPONSE:
- if((val = getPrefetchResponse((int) acceptfd)) != 0) {
- printf("Error: In getPrefetchResponse() %s, %d\n", __FILE__, __LINE__);
- pthread_exit(NULL);
- }
- break;
- case START_REMOTE_THREAD:
- retval = recv((int)acceptfd, &oid, sizeof(unsigned int), 0);
- if (retval <= 0)
- perror("dstmAccept(): error receiving START_REMOTE_THREAD msg");
- else if (retval != sizeof(unsigned int))
- printf("dstmAccept(): incorrect msg size %d for START_REMOTE_THREAD %s, %d\n",
- retval, __FILE__, __LINE__);
- else
- {
- objType = getObjType(oid);
- startDSMthread(oid, objType);
- }
- break;
-
- case THREAD_NOTIFY_REQUEST:
- retval = recv((int)acceptfd, &numoid, sizeof(unsigned int), 0);
- size = (sizeof(unsigned int) + sizeof(unsigned short)) * numoid + 2 * sizeof(unsigned int);
- if((buffer = calloc(1,size)) == NULL) {
- printf("%s() Calloc error at %s, %d\n", __func__, __FILE__, __LINE__);
- pthread_exit(NULL);
- }
- sum = 0;
- do {
- sum += recv((int)acceptfd, buffer+sum, size-sum, 0);
- } while(sum < size);
-
- oidarry = calloc(numoid, sizeof(unsigned int));
- memcpy(oidarry, buffer, sizeof(unsigned int) * numoid);
- size = sizeof(unsigned int) * numoid;
- versionarry = calloc(numoid, sizeof(unsigned short));
- memcpy(versionarry, buffer+size, sizeof(unsigned short) * numoid);
- size += sizeof(unsigned short) * numoid;
- mid = *((unsigned int *)(buffer+size));
- size += sizeof(unsigned int);
- threadid = *((unsigned int *)(buffer+size));
- processReqNotify(numoid, oidarry, versionarry, mid, threadid);
- free(buffer);
-
- break;
-
- case THREAD_NOTIFY_RESPONSE:
- size = sizeof(unsigned short) + 2 * sizeof(unsigned int);
- if((buffer = calloc(1,size)) == NULL) {
- printf("%s() Calloc error at %s, %d\n", __func__, __FILE__, __LINE__);
- pthread_exit(NULL);
- }
-
- sum = 0;
- do {
- sum += recv((int)acceptfd, buffer+sum, size-sum, 0);
- } while(sum < size);
-
- oid = *((unsigned int *)buffer);
- size = sizeof(unsigned int);
- version = *((unsigned short *)(buffer+size));
- size += sizeof(unsigned short);
- threadid = *((unsigned int *)(buffer+size));
- threadNotify(oid,version,threadid);
- free(buffer);
-
- break;
- default:
- printf("Error: dstmAccept() Unknown opcode %d at %s, %d\n", control, __FILE__, __LINE__);
- }
-
- /* Close connection */
- if (close((int)acceptfd) == -1)
- perror("close");
+ }
+ h = (objheader_t *) srcObj;
+ GETSIZE(size, h);
+ size += sizeof(objheader_t);
+ sockid = (int) acceptfd;
+ if (h == NULL) {
+ ctrl = OBJECT_NOT_FOUND;
+ send_data(sockid, &ctrl, sizeof(char));
+ } else {
+ // Type
+ char msg[]={OBJECT_FOUND, 0, 0, 0, 0};
+ *((int *)&msg[1])=size;
+ send_data(sockid, &msg, sizeof(msg));
+ send_data(sockid, h, size);
+ }
+ break;
+
+ case READ_MULT_REQUEST:
+ break;
+
+ case MOVE_REQUEST:
+ break;
+
+ case MOVE_MULT_REQUEST:
+ break;
+
+ case TRANS_REQUEST:
+ /* Read transaction request */
+ transinfo.objlocked = NULL;
+ transinfo.objnotfound = NULL;
+ transinfo.modptr = NULL;
+ transinfo.numlocked = 0;
+ transinfo.numnotfound = 0;
+ if((val = readClientReq(&transinfo, (int)acceptfd, &readbuffer)) != 0) {
+ printf("Error: In readClientReq() %s, %d\n", __FILE__, __LINE__);
pthread_exit(NULL);
+ }
+ break;
+
+ case TRANS_PREFETCH:
+#ifdef RANGEPREFETCH
+ if((val = rangePrefetchReq((int)acceptfd, &readbuffer)) != 0) {
+ printf("Error: In rangePrefetchReq() %s, %d\n", __FILE__, __LINE__);
+ break;
+ }
+#else
+ if((val = prefetchReq((int)acceptfd, &readbuffer)) != 0) {
+ printf("Error: In prefetchReq() %s, %d\n", __FILE__, __LINE__);
+ break;
+ }
+#endif
+ break;
+
+ case TRANS_PREFETCH_RESPONSE:
+#ifdef RANGEPREFETCH
+ if((val = getRangePrefetchResponse((int)acceptfd, &readbuffer)) != 0) {
+ printf("Error: In getRangePrefetchRespose() %s, %d\n", __FILE__, __LINE__);
+ break;
+ }
+#else
+ if((val = getPrefetchResponse((int) acceptfd, &readbuffer)) != 0) {
+ printf("Error: In getPrefetchResponse() %s, %d\n", __FILE__, __LINE__);
+ break;
+ }
+#endif
+ break;
+
+ case START_REMOTE_THREAD:
+ recv_data_buf((int)acceptfd, &readbuffer, &oid, sizeof(unsigned int));
+ objType = getObjType(oid);
+ startDSMthread(oid, objType);
+ break;
+
+ case THREAD_NOTIFY_REQUEST:
+ recv_data_buf((int)acceptfd, &readbuffer, &numoid, sizeof(unsigned int));
+ size = (sizeof(unsigned int) + sizeof(unsigned short)) * numoid + 2 * sizeof(unsigned int);
+ if((buffer = calloc(1,size)) == NULL) {
+ printf("%s() Calloc error at %s, %d\n", __func__, __FILE__, __LINE__);
+ pthread_exit(NULL);
+ }
+
+ recv_data_buf((int)acceptfd, &readbuffer, buffer, size);
+
+ oidarry = calloc(numoid, sizeof(unsigned int));
+ memcpy(oidarry, buffer, sizeof(unsigned int) * numoid);
+ size = sizeof(unsigned int) * numoid;
+ versionarry = calloc(numoid, sizeof(unsigned short));
+ memcpy(versionarry, buffer+size, sizeof(unsigned short) * numoid);
+ size += sizeof(unsigned short) * numoid;
+ mid = *((unsigned int *)(buffer+size));
+ size += sizeof(unsigned int);
+ threadid = *((unsigned int *)(buffer+size));
+ processReqNotify(numoid, oidarry, versionarry, mid, threadid);
+ free(buffer);
+ break;
+
+ case THREAD_NOTIFY_RESPONSE:
+ size = sizeof(unsigned short) + 2 * sizeof(unsigned int);
+ if((buffer = calloc(1,size)) == NULL) {
+ printf("%s() Calloc error at %s, %d\n", __func__, __FILE__, __LINE__);
+ pthread_exit(NULL);
+ }
+
+ recv_data_buf((int)acceptfd, &readbuffer, buffer, size);
+
+ oid = *((unsigned int *)buffer);
+ size = sizeof(unsigned int);
+ version = *((unsigned short *)(buffer+size));
+ size += sizeof(unsigned short);
+ threadid = *((unsigned int *)(buffer+size));
+ threadNotify(oid,version,threadid);
+ free(buffer);
+ break;
+
+ case CLOSE_CONNECTION:
+ goto closeconnection;
+
+ default:
+ printf("Error: dstmAccept() Unknown opcode %d at %s, %d\n", control, __FILE__, __LINE__);
+ }
+ }
+
+closeconnection:
+ /* Close connection */
+ if (close((int)acceptfd) == -1)
+ perror("close");
+ pthread_exit(NULL);
}
/* This function reads the information available in a transaction request
* and makes a function call to process the request */
-int readClientReq(trans_commit_data_t *transinfo, int acceptfd) {
- char *ptr;
- void *modptr;
- unsigned int *oidmod, oid;
- fixed_data_t fixed;
- objheader_t *headaddr;
- int sum = 0, i, N, n, val;
-
- oidmod = NULL;
-
- /* Read fixed_data_t data structure */
- N = sizeof(fixed) - 1;
- ptr = (char *)&fixed;;
- fixed.control = TRANS_REQUEST;
- do {
- n = recv((int)acceptfd, (void *) ptr+1+sum, N-sum, 0);
- sum += n;
- } while(sum < N && n != 0);
-
- /* Read list of mids */
- int mcount = fixed.mcount;
- N = mcount * sizeof(unsigned int);
- unsigned int listmid[mcount];
- ptr = (char *) listmid;
- sum = 0;
- do {
- n = recv((int)acceptfd, (void *) ptr+sum, N-sum, 0);
- sum += n;
- } while(sum < N && n != 0);
-
- /* Read oid and version tuples for those objects that are not modified in the transaction */
- int numread = fixed.numread;
- N = numread * (sizeof(unsigned int) + sizeof(unsigned short));
- char objread[N];
- if(numread != 0) { //If pile contains more than one object to be read,
- // keep reading all objects
- sum = 0;
- do {
- n = recv((int)acceptfd, (void *) objread+sum, N-sum, 0);
- sum += n;
- } while(sum < N && n != 0);
- }
-
- /* Read modified objects */
- if(fixed.nummod != 0) {
- if ((modptr = calloc(1, fixed.sum_bytes)) == NULL) {
- printf("calloc error for modified objects %s, %d\n", __FILE__, __LINE__);
- return 1;
- }
- sum = 0;
- do { // Recv the objs that are modified by the Coordinator
- n = recv((int)acceptfd, (char *) modptr+sum, fixed.sum_bytes-sum, 0);
- sum += n;
- } while (sum < fixed.sum_bytes && n != 0);
- }
-
- /* Create an array of oids for modified objects */
- oidmod = (unsigned int *) calloc(fixed.nummod, sizeof(unsigned int));
- if (oidmod == NULL)
- {
- printf("calloc error %s, %d\n", __FILE__, __LINE__);
- return 1;
- }
- ptr = (char *) modptr;
- for(i = 0 ; i < fixed.nummod; i++) {
- int tmpsize;
- headaddr = (objheader_t *) ptr;
- oid = OID(headaddr);
- oidmod[i] = oid;
- GETSIZE(tmpsize, headaddr);
- ptr += sizeof(objheader_t) + tmpsize;
- }
-
- /*Process the information read */
- if((val = processClientReq(&fixed, transinfo, listmid, objread, modptr, oidmod, acceptfd)) != 0) {
- printf("Error: In processClientReq() %s, %d\n", __FILE__, __LINE__);
- /* Free resources */
- if(oidmod != NULL) {
- free(oidmod);
- }
- return 1;
- }
-
- /* Free resources */
- if(oidmod != NULL) {
- free(oidmod);
- }
-
- return 0;
+int readClientReq(trans_commit_data_t *transinfo, int acceptfd, struct readstruct * readbuffer) {
+ char *ptr;
+ void *modptr;
+ unsigned int *oidmod, oid;
+ fixed_data_t fixed;
+ objheader_t *headaddr;
+ int sum, i, size, n, val;
+
+ oidmod = NULL;
+
+ /* Read fixed_data_t data structure */
+ size = sizeof(fixed) - 1;
+ ptr = (char *)&fixed;;
+ fixed.control = TRANS_REQUEST;
+ recv_data_buf((int)acceptfd, readbuffer, ptr+1, size);
+
+ /* Read list of mids */
+ int mcount = fixed.mcount;
+ size = mcount * sizeof(unsigned int);
+ unsigned int listmid[mcount];
+ ptr = (char *) listmid;
+ recv_data_buf((int)acceptfd, readbuffer, ptr, size);
+
+ /* Read oid and version tuples for those objects that are not modified in the transaction */
+ int numread = fixed.numread;
+ size = numread * (sizeof(unsigned int) + sizeof(unsigned short));
+ char objread[size];
+ if(numread != 0) { //If pile contains more than one object to be read,
+ // keep reading all objects
+ recv_data_buf((int)acceptfd, readbuffer, objread, size);
+ }
+
+ /* Read modified objects */
+ if(fixed.nummod != 0) {
+ if ((modptr = calloc(1, fixed.sum_bytes)) == NULL) {
+ printf("calloc error for modified objects %s, %d\n", __FILE__, __LINE__);
+ return 1;
+ }
+ size = fixed.sum_bytes;
+ recv_data_buf((int)acceptfd, readbuffer, modptr, size);
+ }
+
+ /* Create an array of oids for modified objects */
+ oidmod = (unsigned int *) calloc(fixed.nummod, sizeof(unsigned int));
+ if (oidmod == NULL) {
+ printf("calloc error %s, %d\n", __FILE__, __LINE__);
+ return 1;
+ }
+ ptr = (char *) modptr;
+ for(i = 0 ; i < fixed.nummod; i++) {
+ int tmpsize;
+ headaddr = (objheader_t *) ptr;
+ oid = OID(headaddr);
+ oidmod[i] = oid;
+ GETSIZE(tmpsize, headaddr);
+ ptr += sizeof(objheader_t) + tmpsize;
+ }
+
+ /*Process the information read */
+ if((val = processClientReq(&fixed, transinfo, listmid, objread, modptr, oidmod, acceptfd, readbuffer)) != 0) {
+ printf("Error: In processClientReq() %s, %d\n", __FILE__, __LINE__);
+ /* Free resources */
+ if(oidmod != NULL) {
+ free(oidmod);
+ }
+ return 1;
+ }
+
+ /* Free resources */
+ if(oidmod != NULL) {
+ free(oidmod);
+ }
+
+ return 0;
}
-/* This function processes the Coordinator's transaction request using "handleTransReq"
+/* This function processes the Coordinator's transaction request using "handleTransReq"
* function and sends a reply to the co-ordinator.
* Following this it also receives a new control message from the co-ordinator and processes this message*/
int processClientReq(fixed_data_t *fixed, trans_commit_data_t *transinfo,
- unsigned int *listmid, char *objread, void *modptr, unsigned int *oidmod, int acceptfd) {
- char control, sendctrl, retval;
- objheader_t *tmp_header;
- void *header;
- int i = 0, val;
-
- /* Send reply to the Coordinator */
- if((retval = handleTransReq(fixed, transinfo, listmid, objread, modptr,acceptfd)) == 0 ) {
- printf("Error: In handleTransReq() %s, %d\n", __FILE__, __LINE__);
- return 1;
- }
-
- do {
- retval = recv((int)acceptfd, &control, sizeof(char), 0);
- } while(retval < sizeof(char));
-
- /* Process the new control message */
- switch(control) {
- case TRANS_ABORT:
- if (fixed->nummod > 0)
- free(modptr);
- /* Unlock objects that was locked due to this transaction */
- for(i = 0; i< transinfo->numlocked; i++) {
- if((header = mhashSearch(transinfo->objlocked[i])) == NULL) {
- printf("mhashSearch returns NULL at %s, %d\n", __FILE__, __LINE__);// find the header address
- return 1;
- }
- STATUS(((objheader_t *)header)) &= ~(LOCK);
- }
-
- /* Send ack to Coordinator */
- sendctrl = TRANS_UNSUCESSFUL;
- if(send((int)acceptfd, &sendctrl, sizeof(char), MSG_NOSIGNAL) < sizeof(char)) {
- perror("Error: In sending ACK to coordinator\n");
- if (transinfo->objlocked != NULL) {
- free(transinfo->objlocked);
- }
- if (transinfo->objnotfound != NULL) {
- free(transinfo->objnotfound);
- }
-
- return 1;
- }
- break;
-
- case TRANS_COMMIT:
- /* Invoke the transCommit process() */
- if((val = transCommitProcess(modptr, oidmod, transinfo->objlocked, fixed->nummod, transinfo->numlocked, (int)acceptfd)) != 0) {
- printf("Error: In transCommitProcess() %s, %d\n", __FILE__, __LINE__);
- /* Free memory */
- if (transinfo->objlocked != NULL) {
- free(transinfo->objlocked);
- }
- if (transinfo->objnotfound != NULL) {
- free(transinfo->objnotfound);
- }
- return 1;
- }
- break;
-
- case TRANS_ABORT_BUT_RETRY_COMMIT_WITH_RELOCATING:
- break;
- default:
- printf("Error: No response to TRANS_AGREE OR DISAGREE protocol %s, %d\n", __FILE__, __LINE__);
- //TODO Use fixed.trans_id TID since Client may have died
- break;
- }
-
- /* Free memory */
- if (transinfo->objlocked != NULL) {
- free(transinfo->objlocked);
- }
- if (transinfo->objnotfound != NULL) {
- free(transinfo->objnotfound);
- }
-
- return 0;
+ unsigned int *listmid, char *objread, void *modptr, unsigned int *oidmod, int acceptfd, struct readstruct *readbuffer) {
+
+ char control, sendctrl, retval;
+ objheader_t *tmp_header;
+ void *header;
+ int i = 0, val;
+
+ /* Send reply to the Coordinator */
+ if((retval = handleTransReq(fixed, transinfo, listmid, objread, modptr,acceptfd)) == 0 ) {
+ printf("Error: In handleTransReq() %s, %d\n", __FILE__, __LINE__);
+ return 1;
+ }
+
+ recv_data_buf((int)acceptfd, readbuffer, &control, sizeof(char));
+ /* Process the new control message */
+ switch(control) {
+ case TRANS_ABORT:
+ if (fixed->nummod > 0)
+ free(modptr);
+ /* Unlock objects that was locked due to this transaction */
+ int useWriteUnlock = 0;
+ for(i = 0; i< transinfo->numlocked; i++) {
+ if(transinfo->objlocked[i] == -1) {
+ useWriteUnlock = 1;
+ continue;
+ }
+ if((header = mhashSearch(transinfo->objlocked[i])) == NULL) {
+ printf("mhashSearch returns NULL at %s, %d\n", __FILE__, __LINE__); // find the header address
+ return 1;
+ }
+ if(useWriteUnlock) {
+ write_unlock(STATUSPTR(header));
+ } else {
+ read_unlock(STATUSPTR(header));
+ }
+ }
+ break;
+
+ case TRANS_COMMIT:
+ /* Invoke the transCommit process() */
+ if((val = transCommitProcess(modptr, oidmod, transinfo->objlocked, fixed->nummod, transinfo->numlocked, (int)acceptfd)) != 0) {
+ printf("Error: In transCommitProcess() %s, %d\n", __FILE__, __LINE__);
+ /* Free memory */
+ if (transinfo->objlocked != NULL) {
+ free(transinfo->objlocked);
+ }
+ if (transinfo->objnotfound != NULL) {
+ free(transinfo->objnotfound);
+ }
+ return 1;
+ }
+ break;
+
+ case TRANS_ABORT_BUT_RETRY_COMMIT_WITH_RELOCATING:
+ break;
+
+ default:
+ printf("Error: No response to TRANS_AGREE OR DISAGREE protocol %s, %d\n", __FILE__, __LINE__);
+ //TODO Use fixed.trans_id TID since Client may have died
+ break;
+ }
+
+ /* Free memory */
+ if (transinfo->objlocked != NULL) {
+ free(transinfo->objlocked);
+ }
+ if (transinfo->objnotfound != NULL) {
+ free(transinfo->objnotfound);
+ }
+
+ return 0;
}
-/* This function increments counters while running a voting decision on all objects involved
+/* This function increments counters while running a voting decision on all objects involved
* in TRANS_REQUEST and If a TRANS_DISAGREE sends the response immediately back to the coordinator */
char handleTransReq(fixed_data_t *fixed, trans_commit_data_t *transinfo, unsigned int *listmid, char *objread, void *modptr, int acceptfd) {
- int val, i = 0, j;
- unsigned short version;
- char control = 0, *ptr;
- unsigned int oid;
- unsigned int *oidnotfound, *oidlocked;
- void *mobj;
- objheader_t *headptr;
-
- /* Counters and arrays to formulate decision on control message to be sent */
- oidnotfound = (unsigned int *) calloc(fixed->numread + fixed->nummod, sizeof(unsigned int));
- oidlocked = (unsigned int *) calloc(fixed->numread + fixed->nummod, sizeof(unsigned int));
- int objnotfound = 0, objlocked = 0;
- int v_nomatch = 0, v_matchlock = 0, v_matchnolock = 0;
-
- /* modptr points to the beginning of the object store
- * created at the Pariticipant.
- * Object store holds the modified objects involved in the transaction request */
- ptr = (char *) modptr;
-
- /* Process each oid in the machine pile/ group per thread */
- for (i = 0; i < fixed->numread + fixed->nummod; i++) {
- if (i < fixed->numread) {//Objs only read and not modified
- int incr = sizeof(unsigned int) + sizeof(unsigned short);// Offset that points to next position in the objread array
- incr *= i;
- oid = *((unsigned int *)(objread + incr));
- incr += sizeof(unsigned int);
- version = *((unsigned short *)(objread + incr));
- } else {//Objs modified
- int tmpsize;
- headptr = (objheader_t *) ptr;
- oid = OID(headptr);
- version = headptr->version;
- GETSIZE(tmpsize, headptr);
- ptr += sizeof(objheader_t) + tmpsize;
- }
-
- /* Check if object is still present in the machine since the beginning of TRANS_REQUEST */
-
- if ((mobj = mhashSearch(oid)) == NULL) {/* Obj not found */
- /* Save the oids not found and number of oids not found for later use */
- oidnotfound[objnotfound] = oid;
- objnotfound++;
- } else { /* If Obj found in machine (i.e. has not moved) */
- /* Check if Obj is locked by any previous transaction */
- if ((STATUS(((objheader_t *)mobj)) & LOCK) == LOCK) {
- if (version == ((objheader_t *)mobj)->version) { /* If locked then match versions */
- v_matchlock++;
- } else {/* If versions don't match ...HARD ABORT */
- v_nomatch++;
- /* Send TRANS_DISAGREE to Coordinator */
- control = TRANS_DISAGREE;
- if (objlocked > 0) {
- for(j = 0; j < objlocked; j++) {
- if((headptr = mhashSearch(oidlocked[j])) == NULL) {
- printf("mhashSearch returns NULL at %s, %d\n", __FILE__, __LINE__);
- return 0;
- }
- STATUS(headptr) &= ~(LOCK);
- }
- free(oidlocked);
- }
- if((val = send(acceptfd, &control, sizeof(char), MSG_NOSIGNAL)) < sizeof(char)) {
- perror("Error in sending control to the Coordinator\n");
- return 0;
- }
- return control;
- }
- } else {/* If Obj is not locked then lock object */
- STATUS(((objheader_t *)mobj)) |= LOCK;
- /* Save all object oids that are locked on this machine during this transaction request call */
- oidlocked[objlocked] = OID(((objheader_t *)mobj));
- objlocked++;
- if (version == ((objheader_t *)mobj)->version) { /* Check if versions match */
- v_matchnolock++;
- } else { /* If versions don't match ...HARD ABORT */
- v_nomatch++;
- control = TRANS_DISAGREE;
- if (objlocked > 0) {
- for(j = 0; j < objlocked; j++) {
- if((headptr = mhashSearch(oidlocked[j])) == NULL) {
- printf("mhashSearch returns NULL at %s, %d\n", __FILE__, __LINE__);
- return 0;
- }
- STATUS(headptr) &= ~(LOCK);
- }
- free(oidlocked);
- }
-
- /* Send TRANS_DISAGREE to Coordinator */
- if((val = send(acceptfd, &control, sizeof(char), MSG_NOSIGNAL)) < sizeof(char)) {
- perror("Error in sending control to the Coordinator\n");
- return 0;
- }
-
- return control;
- }
- }
- }
+ int val, i = 0, j;
+ unsigned short version;
+ char control = 0, *ptr;
+ unsigned int oid;
+ unsigned int *oidnotfound, *oidlocked, *oidvernotmatch;
+ objheader_t *headptr;
+
+ /* Counters and arrays to formulate decision on control message to be sent */
+ oidnotfound = (unsigned int *) calloc(fixed->numread + fixed->nummod, sizeof(unsigned int));
+ oidlocked = (unsigned int *) calloc(fixed->numread + fixed->nummod + 1, sizeof(unsigned int));
+ oidvernotmatch = (unsigned int *) calloc(fixed->numread + fixed->nummod, sizeof(unsigned int));
+ int objnotfound = 0, objlocked = 0, objvernotmatch = 0;
+ int v_nomatch = 0, v_matchlock = 0, v_matchnolock = 0;
+ int numBytes = 0;
+ /* modptr points to the beginning of the object store
+ * created at the Pariticipant.
+ * Object store holds the modified objects involved in the transaction request */
+ ptr = (char *) modptr;
+
+ /* Process each oid in the machine pile/ group per thread */
+ for (i = 0; i < fixed->numread + fixed->nummod; i++) {
+ if (i < fixed->numread) { //Objs only read and not modified
+ int incr = sizeof(unsigned int) + sizeof(unsigned short); // Offset that points to next position in the objread array
+ incr *= i;
+ oid = *((unsigned int *)(objread + incr));
+ incr += sizeof(unsigned int);
+ version = *((unsigned short *)(objread + incr));
+ getCommitCountForObjRead(oidnotfound, oidlocked, oidvernotmatch, &objnotfound, &objlocked, &objvernotmatch,
+ &v_matchnolock, &v_matchlock, &v_nomatch, &numBytes, &control, oid, version);
+ } else { //Objs modified
+ if(i == fixed->numread) {
+ oidlocked[objlocked++] = -1;
+ }
+ int tmpsize;
+ headptr = (objheader_t *) ptr;
+ oid = OID(headptr);
+ version = headptr->version;
+ GETSIZE(tmpsize, headptr);
+ ptr += sizeof(objheader_t) + tmpsize;
+ getCommitCountForObjMod(oidnotfound, oidlocked, oidvernotmatch, &objnotfound,
+ &objlocked, &objvernotmatch, &v_matchnolock, &v_matchlock, &v_nomatch,
+ &numBytes, &control, oid, version);
+ }
+ }
+
+ /* send TRANS_DISAGREE and objs*/
+ if(v_nomatch > 0) {
+#ifdef CACHE
+ char *objs = calloc(1, numBytes);
+ int j, offset = 0;
+ for(j = 0; j<objvernotmatch; j++) {
+ objheader_t *header = mhashSearch(oidvernotmatch[j]);
+ int size = 0;
+ GETSIZE(size, header);
+ size += sizeof(objheader_t);
+ memcpy(objs+offset, header, size);
+ offset += size;
+ }
+#endif
+ if (objlocked > 0) {
+ int useWriteUnlock = 0;
+ for(j = 0; j < objlocked; j++) {
+ if(oidlocked[j] == -1) {
+ useWriteUnlock = 1;
+ continue;
+ }
+ if((headptr = mhashSearch(oidlocked[j])) == NULL) {
+ printf("mhashSearch returns NULL at %s, %d\n", __FILE__, __LINE__);
+ return 0;
}
-
- /* Decide what control message to send to Coordinator */
- if ((control = decideCtrlMessage(fixed, transinfo, &v_matchnolock, &v_matchlock, &v_nomatch, &objnotfound, &objlocked,
- modptr, oidnotfound, oidlocked, acceptfd)) == 0) {
- printf("Error: In decideCtrlMessage() %s, %d\n", __FILE__, __LINE__);
- return 0;
+ if(useWriteUnlock) {
+ write_unlock(STATUSPTR(headptr));
+ } else {
+ read_unlock(STATUSPTR(headptr));
}
-
- return control;
+ }
+ free(oidlocked);
+ }
+ send_data(acceptfd, &control, sizeof(char));
+#ifdef CACHE
+ send_data(acceptfd, &numBytes, sizeof(int));
+ send_data(acceptfd, objs, numBytes);
+ transinfo->objvernotmatch = oidvernotmatch;
+ transinfo->numvernotmatch = objvernotmatch;
+ free(objs);
+ free(transinfo->objvernotmatch);
+#endif
+ return control;
+ }
+
+ /* Decide what control message to send to Coordinator */
+ if ((control = decideCtrlMessage(fixed, transinfo, &v_matchnolock, &v_matchlock, &v_nomatch, &objnotfound, &objlocked,
+ modptr, oidnotfound, oidlocked, acceptfd)) == 0) {
+ printf("Error: In decideCtrlMessage() %s, %d\n", __FILE__, __LINE__);
+ return 0;
+ }
+ return control;
+}
+/* Update Commit info for objects that are read */
+void getCommitCountForObjMod(unsigned int *oidnotfound, unsigned int *oidlocked,
+ unsigned int *oidvernotmatch, int *objnotfound, int *objlocked, int *objvernotmatch,
+ int *v_matchnolock, int *v_matchlock, int *v_nomatch, int *numBytes,
+ char *control, unsigned int oid, unsigned short version) {
+ void *mobj;
+ /* Check if object is still present in the machine since the beginning of TRANS_REQUEST */
+
+ if ((mobj = mhashSearch(oid)) == NULL) { /* Obj not found */
+ /* Save the oids not found and number of oids not found for later use */
+ oidnotfound[*objnotfound] = oid;
+ (*objnotfound)++;
+ } else { /* If Obj found in machine (i.e. has not moved) */
+ /* Check if Obj is locked by any previous transaction */
+ if (write_trylock(STATUSPTR(mobj))) { // Can acquire write lock
+ if (version == ((objheader_t *)mobj)->version) { /* match versions */
+ (*v_matchnolock)++;
+ } else { /* If versions don't match ...HARD ABORT */
+ (*v_nomatch)++;
+ oidvernotmatch[*objvernotmatch] = oid;
+ (*objvernotmatch)++;
+ int size;
+ GETSIZE(size, mobj);
+ size += sizeof(objheader_t);
+ *numBytes += size;
+ /* Send TRANS_DISAGREE to Coordinator */
+ *control = TRANS_DISAGREE;
+ //printf("%s() oid = %d, type = %d\t", __func__, OID(mobj), TYPE((objheader_t *)mobj));
+ }
+ //Keep track of oid locked
+ oidlocked[(*objlocked)++] = OID(((objheader_t *)mobj));
+ } else { //we are locked
+ if (version == ((objheader_t *)mobj)->version) { /* Check if versions match */
+ (*v_matchlock)++;
+ } else { /* If versions don't match ...HARD ABORT */
+ (*v_nomatch)++;
+ oidvernotmatch[*objvernotmatch] = oid;
+ (*objvernotmatch)++;
+ int size;
+ GETSIZE(size, mobj);
+ size += sizeof(objheader_t);
+ *numBytes += size;
+ *control = TRANS_DISAGREE;
+ //printf("%s() oid = %d, type = %d\t", __func__, OID(mobj), TYPE((objheader_t *)mobj));
+ }
+ }
+ }
+}
+
+/* Update Commit info for objects that are read */
+void getCommitCountForObjRead(unsigned int *oidnotfound, unsigned int *oidlocked, unsigned int *oidvernotmatch,
+ int *objnotfound, int *objlocked, int * objvernotmatch, int *v_matchnolock, int *v_matchlock,
+ int *v_nomatch, int *numBytes, char *control, unsigned int oid, unsigned short version) {
+ void *mobj;
+ /* Check if object is still present in the machine since the beginning of TRANS_REQUEST */
+ if ((mobj = mhashSearch(oid)) == NULL) { /* Obj not found */
+ /* Save the oids not found and number of oids not found for later use */
+ oidnotfound[*objnotfound] = oid;
+ (*objnotfound)++;
+ } else { /* If Obj found in machine (i.e. has not moved) */
+ /* Check if Obj is locked by any previous transaction */
+ if (read_trylock(STATUSPTR(mobj))) { //Can further acquire read locks
+ if (version == ((objheader_t *)mobj)->version) { /* match versions */
+ (*v_matchnolock)++;
+ } else { /* If versions don't match ...HARD ABORT */
+ (*v_nomatch)++;
+ oidvernotmatch[(*objvernotmatch)++] = oid;
+ int size;
+ GETSIZE(size, mobj);
+ size += sizeof(objheader_t);
+ *numBytes += size;
+ /* Send TRANS_DISAGREE to Coordinator */
+ *control = TRANS_DISAGREE;
+ //printf("%s() oid = %d, type = %d\t", __func__, OID(mobj), TYPE((objheader_t *)mobj));
+ }
+ //Keep track of oid locked
+ oidlocked[(*objlocked)++] = OID(((objheader_t *)mobj));
+ } else { /* Some other transaction has aquired a write lock on this object */
+ if (version == ((objheader_t *)mobj)->version) { /* Check if versions match */
+ (*v_matchlock)++;
+ } else { /* If versions don't match ...HARD ABORT */
+ (*v_nomatch)++;
+ oidvernotmatch[*objvernotmatch] = oid;
+ (*objvernotmatch)++;
+ int size;
+ GETSIZE(size, mobj);
+ size += sizeof(objheader_t);
+ *numBytes += size;
+ *control = TRANS_DISAGREE;
+ //printf("%s() oid = %d, type = %d\t", __func__, OID(mobj), TYPE((objheader_t *)mobj));
+ }
+ }
+ }
}
+
/* This function decides what control message such as TRANS_AGREE, TRANS_DISAGREE or TRANS_SOFT_ABORT
* to send to Coordinator based on the votes of oids involved in the transaction */
-char decideCtrlMessage(fixed_data_t *fixed, trans_commit_data_t *transinfo, int *v_matchnolock, int *v_matchlock,
- int *v_nomatch, int *objnotfound, int *objlocked, void *modptr,
- unsigned int *oidnotfound, unsigned int *oidlocked, int acceptfd) {
- int val;
- char control = 0;
-
- /* Condition to send TRANS_AGREE */
- if(*(v_matchnolock) == fixed->numread + fixed->nummod) {
- control = TRANS_AGREE;
- /* Send control message */
- if((val = send(acceptfd, &control, sizeof(char), MSG_NOSIGNAL)) < sizeof(char)) {
- perror("Error in sending control to Coordinator\n");
- return 0;
- }
- }
- /* Condition to send TRANS_SOFT_ABORT */
- if((*(v_matchlock) > 0 && *(v_nomatch) == 0) || (*(objnotfound) > 0 && *(v_nomatch) == 0)) {
- control = TRANS_SOFT_ABORT;
-
- /* Send control message */
- if((val = send(acceptfd, &control, sizeof(char),MSG_NOSIGNAL)) < sizeof(char)) {
- perror("Error in sending TRANS_SOFT_ABORT control\n");
- return 0;
- }
-
- /* Send number of oids not found and the missing oids if objects are missing in the machine */
- if(*(objnotfound) != 0) {
- int msg[1];
- msg[0] = *(objnotfound);
- if((val = send(acceptfd, msg, sizeof(int) ,MSG_NOSIGNAL)) < sizeof(int)) {
- perror("Error in sending objects that are not found\n");
- return 0;
- }
- int size = sizeof(unsigned int)* *(objnotfound);
- if((val = send(acceptfd, oidnotfound, size ,MSG_NOSIGNAL)) < size) {
- perror("Error in sending objects that are not found\n");
- return 0;
- }
- }
- }
-
- /* Fill out the trans_commit_data_t data structure. This is required for a trans commit process
- * if Participant receives a TRANS_COMMIT */
- transinfo->objlocked = oidlocked;
- transinfo->objnotfound = oidnotfound;
- transinfo->modptr = modptr;
- transinfo->numlocked = *(objlocked);
- transinfo->numnotfound = *(objnotfound);
-
- return control;
+char decideCtrlMessage(fixed_data_t *fixed, trans_commit_data_t *transinfo, int *v_matchnolock, int *v_matchlock,
+ int *v_nomatch, int *objnotfound, int *objlocked, void *modptr,
+ unsigned int *oidnotfound, unsigned int *oidlocked, int acceptfd) {
+ int val;
+ char control = 0;
+
+ /* Condition to send TRANS_AGREE */
+ if(*(v_matchnolock) == fixed->numread + fixed->nummod) {
+ control = TRANS_AGREE;
+ /* Send control message */
+ send_data(acceptfd, &control, sizeof(char));
+ }
+ /* Condition to send TRANS_SOFT_ABORT */
+ if((*(v_matchlock) > 0 && *(v_nomatch) == 0) || (*(objnotfound) > 0 && *(v_nomatch) == 0)) {
+ control = TRANS_SOFT_ABORT;
+
+ /* Send control message */
+ send_data(acceptfd, &control, sizeof(char));
+
+ /* FIXME how to send objs Send number of oids not found and the missing oids if objects are missing in the machine */
+ if(*(objnotfound) != 0) {
+ int msg[1];
+ msg[0] = *(objnotfound);
+ send_data(acceptfd, &msg, sizeof(int));
+ int size = sizeof(unsigned int)* *(objnotfound);
+ send_data(acceptfd, oidnotfound, size);
+ }
+ }
+
+ /* Fill out the trans_commit_data_t data structure. This is required for a trans commit process
+ * if Participant receives a TRANS_COMMIT */
+ transinfo->objlocked = oidlocked;
+ transinfo->objnotfound = oidnotfound;
+ transinfo->modptr = modptr;
+ transinfo->numlocked = *(objlocked);
+ transinfo->numnotfound = *(objnotfound);
+ return control;
}
-/* This function processes all modified objects involved in a TRANS_COMMIT and updates pointer
+/* This function processes all modified objects involved in a TRANS_COMMIT and updates pointer
* addresses in lookup table and also changes version number
* Sends an ACK back to Coordinator */
int transCommitProcess(void *modptr, unsigned int *oidmod, unsigned int *oidlocked, int nummod, int numlocked, int acceptfd) {
- objheader_t *header;
- objheader_t *newheader;
- int i = 0, offset = 0;
- char control;
- int tmpsize;
-
- /* Process each modified object saved in the mainobject store */
- for(i = 0; i < nummod; i++) {
- if((header = (objheader_t *) mhashSearch(oidmod[i])) == NULL) {
- printf("Error: mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
- return 1;
- }
- GETSIZE(tmpsize,header);
- pthread_mutex_lock(&mainobjstore_mutex);
- memcpy((char*)header + sizeof(objheader_t), ((char *)modptr + sizeof(objheader_t) + offset), tmpsize);
- header->version += 1;
- /* If threads are waiting on this object to be updated, notify them */
- if(header->notifylist != NULL) {
- notifyAll(&header->notifylist, OID(header), header->version);
- }
- pthread_mutex_unlock(&mainobjstore_mutex);
- offset += sizeof(objheader_t) + tmpsize;
- }
-
- if (nummod > 0)
- free(modptr);
-
- /* Unlock locked objects */
- for(i = 0; i < numlocked; i++) {
- if((header = (objheader_t *) mhashSearch(oidlocked[i])) == NULL) {
- printf("Error: mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
- return 1;
- }
- STATUS(header) &= ~(LOCK);
- }
- //TODO Update location lookup table
-
- /* Send ack to coordinator */
- control = TRANS_SUCESSFUL;
- if(send((int)acceptfd, &control, sizeof(char), MSG_NOSIGNAL) < sizeof(char)) {
- perror("Error sending ACK to coordinator\n");
- return 1;
- }
-
- return 0;
+ objheader_t *header;
+ objheader_t *newheader;
+ int i = 0, offset = 0;
+ char control;
+ int tmpsize;
+
+ /* Process each modified object saved in the mainobject store */
+ for(i = 0; i < nummod; i++) {
+ if((header = (objheader_t *) mhashSearch(oidmod[i])) == NULL) {
+ printf("Error: mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
+ return 1;
+ }
+ GETSIZE(tmpsize,header);
+
+ {
+ struct ___Object___ *dst=(struct ___Object___*)((char*)header+sizeof(objheader_t));
+ struct ___Object___ *src=(struct ___Object___*)((char*)modptr+sizeof(objheader_t)+offset);
+ dst->type=src->type;
+ dst->___cachedCode___=src->___cachedCode___;
+ dst->___cachedHash___=src->___cachedHash___;
+ memcpy(&dst[1], &src[1], tmpsize-sizeof(struct ___Object___));
+ }
+ header->version += 1;
+ /* If threads are waiting on this object to be updated, notify them */
+ if(header->notifylist != NULL) {
+ notifyAll(&header->notifylist, OID(header), header->version);
+ }
+ offset += sizeof(objheader_t) + tmpsize;
+ }
+
+ if (nummod > 0)
+ free(modptr);
+
+ /* Unlock locked objects */
+ int useWriteUnlock = 0;
+ for(i = 0; i < numlocked; i++) {
+ if(oidlocked[i] == -1) {
+ useWriteUnlock = 1;
+ continue;
+ }
+ if((header = (objheader_t *) mhashSearch(oidlocked[i])) == NULL) {
+ printf("Error: mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
+ return 1;
+ }
+
+ if(useWriteUnlock) {
+ write_unlock(STATUSPTR(header));
+ } else {
+ read_unlock(STATUSPTR(header));
+ }
+ }
+ //TODO Update location lookup table
+ return 0;
}
/* This function recevies the oid and offset tuples from the Coordinator's prefetch call.
* If objects are not found then record those and if objects are found
* then use offset values to prefetch references to other objects */
-int prefetchReq(int acceptfd) {
- int i, size, objsize, numbytes = 0, isArray = 0, numoffset = 0;
- int length, sd;
- char *recvbuffer, *sendbuffer, control;
- unsigned int oid, mid;
- short *offsetarry;
- objheader_t *header;
- struct sockaddr_in remoteAddr;
-
- while((numbytes = recv((int)acceptfd, &length, sizeof(int), 0)) != 0) {
- if(length == -1) { //-1 is special character to represent end of sending oids and offsets
- break;
- } else {
- numbytes = 0;
- size = length - sizeof(int);
- if((recvbuffer = calloc(1, size)) == NULL) {
- printf("Calloc error at %s,%d\n", __FILE__, __LINE__);
- return -1;
- }
- while(numbytes < size) {
- numbytes += recv((int)acceptfd, recvbuffer+numbytes, size-numbytes, 0);
- }
-
- oid = *((unsigned int *) recvbuffer);
- mid = *((unsigned int *) (recvbuffer + sizeof(unsigned int)));
- size = size - (2 * sizeof(unsigned int));
- numoffset = size / sizeof(short);
- if((offsetarry = calloc(numoffset, sizeof(short))) == NULL) {
- printf("Calloc error at %s,%d\n", __FILE__, __LINE__);
- free(recvbuffer);
- return -1;
- }
- memcpy(offsetarry, recvbuffer + (2 * sizeof(unsigned int)), size);
- free(recvbuffer);
-
- /* Create socket to send information */
- if ((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0){
- perror("prefetchReq():socket()");
- return -1;
- }
- bzero(&remoteAddr, sizeof(remoteAddr));
- remoteAddr.sin_family = AF_INET;
- remoteAddr.sin_port = htons(LISTEN_PORT);
- remoteAddr.sin_addr.s_addr = htonl(mid);
-
- if (connect(sd, (struct sockaddr *)&remoteAddr, sizeof(remoteAddr)) < 0){
- printf("Error: prefetchReq():error %d connecting to %s:%d\n", errno,
- inet_ntoa(remoteAddr.sin_addr), LISTEN_PORT);
- close(sd);
- return -1;
- }
-
- /*Process each oid */
- if ((header = mhashSearch(oid)) == NULL) {/* Obj not found */
- /* Save the oids not found in buffer for later use */
- size = sizeof(int) + sizeof(char) + sizeof(unsigned int) ;
- if((sendbuffer = calloc(1, size)) == NULL) {
- printf("Calloc error at %s,%d\n", __FILE__, __LINE__);
- free(offsetarry);
- close(sd);
- return -1;
- }
- *((int *) sendbuffer) = size;
- *((char *)(sendbuffer + sizeof(int))) = OBJECT_NOT_FOUND;
- *((unsigned int *)(sendbuffer + sizeof(int) + sizeof(char))) = oid;
-
- control = TRANS_PREFETCH_RESPONSE;
- if(sendPrefetchResponse(sd, &control, sendbuffer, &size) != 0) {
- free(offsetarry);
- printf("Error: %s() in sending prefetch response at %s, %d\n",
- __func__, __FILE__, __LINE__);
- close(sd);
- return -1;
- }
- } else { /* Object Found */
- int incr = 0;
- GETSIZE(objsize, header);
- size = sizeof(int) + sizeof(char) + sizeof(unsigned int) + sizeof(objheader_t) + objsize;
- if((sendbuffer = calloc(1, size)) == NULL) {
- printf("Calloc error at %s,%d\n", __FILE__, __LINE__);
- free(offsetarry);
- close(sd);
- return -1;
- }
- *((int *) (sendbuffer + incr)) = size;
- incr += sizeof(int);
- *((char *)(sendbuffer + incr)) = OBJECT_FOUND;
- incr += sizeof(char);
- *((unsigned int *)(sendbuffer+incr)) = oid;
- incr += sizeof(unsigned int);
- memcpy(sendbuffer + incr, header, objsize + sizeof(objheader_t));
-
- control = TRANS_PREFETCH_RESPONSE;
- if(sendPrefetchResponse(sd, &control, sendbuffer, &size) != 0) {
- free(offsetarry);
- printf("Error: %s() in sending prefetch response at %s, %d\n",
- __func__, __FILE__, __LINE__);
- close(sd);
- return -1;
- }
- /* Calculate the oid corresponding to the offset value */
- for(i = 0 ; i< numoffset ; i++) {
- /* Check for arrays */
- if(TYPE(header) > NUMCLASSES) {
- isArray = 1;
- }
- if(isArray == 1) {
- int elementsize = classsize[TYPE(header)];
- struct ArrayObject *ao = (struct ArrayObject *) (((char *)header) + sizeof(objheader_t));
- unsigned short length = ao->___length___;
- /* Check if array out of bounds */
- if(offsetarry[i]< 0 || offsetarry[i] >= length) {
- break;
- }
- oid = *((unsigned int *)(((char *)header) + sizeof(objheader_t) + sizeof(struct ArrayObject) + (elementsize*offsetarry[i])));
- } else {
- oid = *((unsigned int *)(((char *)header) + sizeof(objheader_t) + offsetarry[i]));
- }
-
- if((header = mhashSearch(oid)) == NULL) {
- size = sizeof(int) + sizeof(char) + sizeof(unsigned int) ;
- if((sendbuffer = calloc(1, size)) == NULL) {
- printf("Calloc error at %s,%d\n", __FILE__, __LINE__);
- free(offsetarry);
- close(sd);
- return -1;
- }
- *((int *) sendbuffer) = size;
- *((char *)(sendbuffer + sizeof(int))) = OBJECT_NOT_FOUND;
- *((unsigned int *)(sendbuffer + sizeof(int) + sizeof(char))) = oid;
-
- control = TRANS_PREFETCH_RESPONSE;
- if(sendPrefetchResponse(sd, &control, sendbuffer, &size) != 0) {
- free(offsetarry);
- printf("Error: %s() in sending prefetch response at %s, %d\n",
- __FILE__, __LINE__);
- close(sd);
- return -1;
- }
- break;
- } else {/* Obj Found */
- int incr = 0;
- GETSIZE(objsize, header);
- size = sizeof(int) + sizeof(char) + sizeof(unsigned int) + sizeof(objheader_t) + objsize;
- if((sendbuffer = calloc(1, size)) == NULL) {
- printf("Calloc error at %s,%d\n", __func__, __FILE__, __LINE__);
- free(offsetarry);
- close(sd);
- return -1;
- }
- *((int *) (sendbuffer + incr)) = size;
- incr += sizeof(int);
- *((char *)(sendbuffer + incr)) = OBJECT_FOUND;
- incr += sizeof(char);
- *((unsigned int *)(sendbuffer+incr)) = oid;
- incr += sizeof(unsigned int);
- memcpy(sendbuffer + incr, header, objsize + sizeof(objheader_t));
-
- control = TRANS_PREFETCH_RESPONSE;
- if(sendPrefetchResponse(sd, &control, sendbuffer, &size) != 0) {
- free(offsetarry);
- printf("Error: %s() in sending prefetch response at %s, %d\n",
- __func__, __FILE__, __LINE__);
- close(sd);
- return -1;
- }
- }
- isArray = 0;
- }
- free(offsetarry);
- }
- }
- }
- close(sd);
- return 0;
-}
-
-int sendPrefetchResponse(int sd, char *control, char *sendbuffer, int *size) {
- int numbytes = 0;
-
- if((numbytes = send(sd, control, sizeof(char), MSG_NOSIGNAL)) < sizeof(char)) {
- printf("%s() Error: in sending PREFETCH RESPONSE to Coordinator at %s, %d\n", __func__, __FILE__, __LINE__);
- free(sendbuffer);
- return -1;
+int prefetchReq(int acceptfd, struct readstruct * readbuffer) {
+ int i, size, objsize, numoffset = 0;
+ int length;
+ char *recvbuffer, control;
+ unsigned int oid, mid=-1;
+ objheader_t *header;
+ oidmidpair_t oidmid;
+ int sd = -1;
+ while(1) {
+ recv_data_buf((int)acceptfd, readbuffer, &numoffset, sizeof(int));
+ if(numoffset == -1)
+ break;
+ recv_data_buf((int)acceptfd, readbuffer, &oidmid, 2*sizeof(unsigned int));
+ oid = oidmid.oid;
+ if (mid != oidmid.mid) {
+ if (mid!=-1) {
+ freeSockWithLock(transPResponseSocketPool, mid, sd);
+ }
+ mid=oidmid.mid;
+ sd = getSockWithLock(transPResponseSocketPool, mid);
+ }
+ short offsetarry[numoffset];
+ recv_data_buf((int) acceptfd, readbuffer, offsetarry, numoffset*sizeof(short));
+
+ /*Process each oid */
+ if ((header = mhashSearch(oid)) == NULL) { /* Obj not found */
+ /* Save the oids not found in buffer for later use */
+ size = sizeof(int) + sizeof(char) + sizeof(unsigned int) ;
+ char sendbuffer[size+1];
+ sendbuffer[0]=TRANS_PREFETCH_RESPONSE;
+ *((int *) (sendbuffer+sizeof(char))) = size;
+ *((char *)(sendbuffer + sizeof(char)+sizeof(int))) = OBJECT_NOT_FOUND;
+ *((unsigned int *)(sendbuffer + sizeof(int) + sizeof(char)+sizeof(char))) = oid;
+ send_data(sd, sendbuffer, size+1);
+ } else { /* Object Found */
+ int incr = 1;
+ GETSIZE(objsize, header);
+ size = sizeof(int) + sizeof(char) + sizeof(unsigned int) + sizeof(objheader_t) + objsize;
+ char sendbuffer[size+1];
+ sendbuffer[0]=TRANS_PREFETCH_RESPONSE;
+ *((int *)(sendbuffer + incr)) = size;
+ incr += sizeof(int);
+ *((char *)(sendbuffer + incr)) = OBJECT_FOUND;
+ incr += sizeof(char);
+ *((unsigned int *)(sendbuffer+incr)) = oid;
+ incr += sizeof(unsigned int);
+ memcpy(sendbuffer + incr, header, objsize + sizeof(objheader_t));
+ send_data(sd, sendbuffer, size+1);
+
+ /* Calculate the oid corresponding to the offset value */
+ for(i = 0 ; i< numoffset ; i++) {
+ /* Check for arrays */
+ if(TYPE(header) >= NUMCLASSES) {
+ int elementsize = classsize[TYPE(header)];
+ struct ArrayObject *ao = (struct ArrayObject *) (((char *)header) + sizeof(objheader_t));
+ unsigned short length = ao->___length___;
+ /* Check if array out of bounds */
+ if(offsetarry[i]< 0 || offsetarry[i] >= length) {
+ break;
+ }
+ oid = *((unsigned int *)(((char *)header) + sizeof(objheader_t) + sizeof(struct ArrayObject) + (elementsize*offsetarry[i])));
+ } else {
+ oid = *((unsigned int *)(((char *)header) + sizeof(objheader_t) + offsetarry[i]));
}
- /* Send the buffer with its size */
- if((numbytes = send(sd, sendbuffer, *(size), MSG_NOSIGNAL)) < *(size)) {
- printf("%s() Error: in sending oid found at %s, %d size sent = %d, actual size = %d\n",
- __func__, __FILE__, __LINE__, numbytes, *(size));
- free(sendbuffer);
- return -1;
+ /* Don't continue if we hit a NULL pointer */
+ if (oid==0)
+ break;
+
+ if((header = mhashSearch(oid)) == NULL) {
+ size = sizeof(int) + sizeof(char) + sizeof(unsigned int) ;
+ char sendbuffer[size+1];
+ sendbuffer[0]=TRANS_PREFETCH_RESPONSE;
+ *((int *) (sendbuffer+1)) = size;
+ *((char *)(sendbuffer + sizeof(char)+sizeof(int))) = OBJECT_NOT_FOUND;
+ *((unsigned int *)(sendbuffer + sizeof(char)+sizeof(int) + sizeof(char))) = oid;
+
+ send_data(sd, sendbuffer, size+1);
+ break;
+ } else { /* Obj Found */
+ int incr = 1;
+ GETSIZE(objsize, header);
+ size = sizeof(int) + sizeof(char) + sizeof(unsigned int) + sizeof(objheader_t) + objsize;
+ char sendbuffer[size+1];
+ sendbuffer[0]=TRANS_PREFETCH_RESPONSE;
+ *((int *)(sendbuffer + incr)) = size;
+ incr += sizeof(int);
+ *((char *)(sendbuffer + incr)) = OBJECT_FOUND;
+ incr += sizeof(char);
+ *((unsigned int *)(sendbuffer+incr)) = oid;
+ incr += sizeof(unsigned int);
+ memcpy(sendbuffer + incr, header, objsize + sizeof(objheader_t));
+ send_data(sd, sendbuffer, size+1);
}
+ } //end of for
+ }
+ } //end of while
+ //Release socket
+ if (mid!=-1)
+ freeSockWithLock(transPResponseSocketPool, mid, sd);
+ return 0;
+}
- free(sendbuffer);
- return 0;
+void sendPrefetchResponse(int sd, char *control, char *sendbuffer, int *size) {
+ send_data(sd, control, sizeof(char));
+ /* Send the buffer with its size */
+ int length = *(size);
+ send_data(sd, sendbuffer, length);
}
void processReqNotify(unsigned int numoid, unsigned int *oidarry, unsigned short *versionarry, unsigned int mid, unsigned int threadid) {
- objheader_t *header;
- unsigned int oid;
- unsigned short newversion;
- char msg[1+ 2 * sizeof(unsigned int) + sizeof(unsigned short)];
- int sd;
- struct sockaddr_in remoteAddr;
- int bytesSent;
- int size;
-
- int i = 0;
- while(i < numoid) {
- oid = *(oidarry + i);
- if((header = (objheader_t *) mhashSearch(oid)) == NULL) {
- printf("Error: mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
- return;
- } else {
- /* Check to see if versions are same */
+ objheader_t *header;
+ unsigned int oid;
+ unsigned short newversion;
+ char msg[1+ 2 * sizeof(unsigned int) + sizeof(unsigned short)];
+ int sd;
+ struct sockaddr_in remoteAddr;
+ int bytesSent;
+ int size;
+ int i = 0;
+
+ while(i < numoid) {
+ oid = *(oidarry + i);
+ if((header = (objheader_t *) mhashSearch(oid)) == NULL) {
+ printf("Error: mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
+ return;
+ } else {
+ /* Check to see if versions are same */
checkversion:
- if ((STATUS(header) & LOCK) != LOCK) {
- //FIXME make locking atomic
- STATUS(header) |= LOCK;
- newversion = header->version;
- if(newversion == *(versionarry + i)) {
- //Add to the notify list
- if((header->notifylist = insNode(header->notifylist, threadid, mid)) == NULL) {
- printf("Error: Obj notify list points to NULL %s, %d\n", __FILE__, __LINE__);
- return;
- }
- STATUS(header) &= ~(LOCK);
- } else {
- STATUS(header) &= ~(LOCK);
- if ((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0){
- perror("processReqNotify():socket()");
- return;
- }
- bzero(&remoteAddr, sizeof(remoteAddr));
- remoteAddr.sin_family = AF_INET;
- remoteAddr.sin_port = htons(LISTEN_PORT);
- remoteAddr.sin_addr.s_addr = htonl(mid);
-
- if (connect(sd, (struct sockaddr *)&remoteAddr, sizeof(remoteAddr)) < 0){
- printf("Error: processReqNotify():error %d connecting to %s:%d\n", errno,
- inet_ntoa(remoteAddr.sin_addr), LISTEN_PORT);
- close(sd);
- return;
- } else {
- //Send Update notification
- msg[0] = THREAD_NOTIFY_RESPONSE;
- *((unsigned int *)&msg[1]) = oid;
- size = sizeof(unsigned int);
- *((unsigned short *)(&msg[1]+size)) = newversion;
- size += sizeof(unsigned short);
- *((unsigned int *)(&msg[1]+size)) = threadid;
- bytesSent = send(sd, msg, 1+ 2*sizeof(unsigned int) + sizeof(unsigned short), 0);
- if (bytesSent < 0){
- perror("processReqNotify():send()");
- close(sd);
- return;
- } else if (bytesSent != 1 + sizeof(unsigned short) + 2*sizeof(unsigned int)){
- printf("Error: processReqNotify(): error, sent %d bytes %s, %d\n",
- bytesSent, __FILE__, __LINE__);
- close(sd);
- return;
- } else {
- close(sd);
- return;
- }
-
- }
- close(sd);
- }
- } else {
- randomdelay();
- goto checkversion;
- }
- }
- i++;
+ if (write_trylock(STATUSPTR(header))) { // Can acquire write lock
+ newversion = header->version;
+ if(newversion == *(versionarry + i)) {
+ //Add to the notify list
+ if((header->notifylist = insNode(header->notifylist, threadid, mid)) == NULL) {
+ printf("Error: Obj notify list points to NULL %s, %d\n", __FILE__, __LINE__);
+ return;
+ }
+ write_unlock(STATUSPTR(header));
+ } else {
+ write_unlock(STATUSPTR(header));
+ if ((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+ perror("processReqNotify():socket()");
+ return;
+ }
+ bzero(&remoteAddr, sizeof(remoteAddr));
+ remoteAddr.sin_family = AF_INET;
+ remoteAddr.sin_port = htons(LISTEN_PORT);
+ remoteAddr.sin_addr.s_addr = htonl(mid);
+
+ if (connect(sd, (struct sockaddr *)&remoteAddr, sizeof(remoteAddr)) < 0) {
+ printf("Error: processReqNotify():error %d connecting to %s:%d\n", errno,
+ inet_ntoa(remoteAddr.sin_addr), LISTEN_PORT);
+ close(sd);
+ return;
+ } else {
+ //Send Update notification
+ msg[0] = THREAD_NOTIFY_RESPONSE;
+ *((unsigned int *)&msg[1]) = oid;
+ size = sizeof(unsigned int);
+ *((unsigned short *)(&msg[1]+size)) = newversion;
+ size += sizeof(unsigned short);
+ *((unsigned int *)(&msg[1]+size)) = threadid;
+ size = 1+ 2*sizeof(unsigned int) + sizeof(unsigned short);
+ send_data(sd, msg, size);
+ }
+ close(sd);
}
- free(oidarry);
- free(versionarry);
+ } else {
+ randomdelay();
+ goto checkversion;
+ }
+ }
+ i++;
+ }
+ free(oidarry);
+ free(versionarry);
}
-
projects / IRC.git / blobdiff