#ifndef _DSTM_H_
#define _DSTM_H_
+#ifdef MAC
+#define MSG_NOSIGNAL 0
+#endif
+
+/***********************************************************
+ * Macros
+ **********************************************************/
+#define GET_NTUPLES(x) ((int *)(x))
+#define GET_PTR_OID(x) ((unsigned int *)(x + sizeof(int)))
+#define GET_PTR_EOFF(x,n) ((short *)(x + sizeof(int) + (n*sizeof(unsigned int))))
+#define GET_PTR_ARRYFLD(x,n) ((short *)(x + sizeof(int) + (n*sizeof(unsigned int)) + (n*sizeof(short))))
+#define ENDEBUG(s) { printf("Inside %s()\n", s); fflush(stdout);}
+#define EXDEBUG(s) {printf("Outside %s()\n", s); fflush(stdout);}
+/*****************************************
+ * Coordinator Messages
+ ***************************************/
+#define READ_REQUEST 1
+#define READ_MULT_REQUEST 2
+#define MOVE_REQUEST 3
+#define MOVE_MULT_REQUEST 4
+#define TRANS_REQUEST 5
+#define TRANS_ABORT 6
+#define TRANS_COMMIT 7
+#define TRANS_PREFETCH 8
+#define TRANS_ABORT_BUT_RETRY_COMMIT_WITH_RELOCATING 9
+
+/*********************************
+ * Participant Messages
+ *******************************/
+#define OBJECT_FOUND 10
+#define OBJECT_NOT_FOUND 11
+#define OBJECTS_FOUND 12
+#define OBJECTS_NOT_FOUND 13
+#define TRANS_AGREE 17
+#define TRANS_DISAGREE 18
+#define TRANS_AGREE_BUT_MISSING_OBJECTS 19
+#define TRANS_SOFT_ABORT 20
+#define TRANS_SUCESSFUL 21
+#define TRANS_PREFETCH_RESPONSE 22
+#define START_REMOTE_THREAD 23
+#define THREAD_NOTIFY_REQUEST 24
+#define THREAD_NOTIFY_RESPONSE 25
+#define TRANS_UNSUCESSFUL 26
+#define CLOSE_CONNECTION 27
+
+//Max number of objects
+#define MAX_OBJECTS 20
+//Max remote-machine connections
+#define NUM_MACHINES 2
+#define LOADFACTOR 0.5
+#define DEFAULT_OBJ_STORE_SIZE 1048510 //1MB
+//Transaction id per machine
+#define TID_LEN 20
+#define LISTEN_PORT 2156
+#define UDP_PORT 2158
+
+
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
-#include "hashtable.h"
+#include <pthread.h>
+#include "clookup.h"
+#include "queue.h"
+#include "mcpileq.h"
+#include "threadnotify.h"
+#include <arpa/inet.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <errno.h>
+#include <time.h>
+#include "sockpool.h"
+#include "prelookup.h"
+#include <signal.h>
+
+//bit designations for status field of objheader
+#define DIRTY 0x01
+#define NEW 0x02
+#define LOCK 0x04
+#define LOCAL 0x08
+
+/*******Global statistics *********/
+extern int numprefetchsites;
+
+#ifdef COMPILER
+
+#include "structdefs.h"
+
+typedef struct objheader {
+ threadlist_t *notifylist;
+ unsigned short version;
+ unsigned short rcount;
+} objheader_t;
+
+#define OID(x)\
+ (*((unsigned int *)&((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___nextobject___))
+
+#define COMPOID(x)\
+ (*((unsigned int *)&((struct ___Object___ *) x)->___nextobject___))
-enum status {CLEAN, DIRTY};
+#define STATUS(x)\
+ *((unsigned int *) &(((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___localcopy___))
+
+#define STATUSPTR(x)\
+ ((unsigned int *) &(((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___localcopy___))
+
+#define TYPE(x)\
+ ((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->type
+
+#define GETSIZE(size, x) {\
+ int type=TYPE(x);\
+ if (type<NUMCLASSES) {\
+ size=classsize[type];\
+ } else {\
+ size=classsize[type]*((struct ArrayObject *)&((objheader_t *)x)[1])->___length___+sizeof(struct ArrayObject);\
+ }\
+}
+
+#else
typedef struct objheader {
+ threadlist_t *notifylist;
unsigned int oid;
unsigned short type;
unsigned short version;
char status;
} objheader_t;
+#define OID(x) x->oid
+#define TYPE(x) x->type
+#define STATUS(x) x->status
+#define STATUSPTR(x) &x->status
+#define GETSIZE(size, x) size=classsize[TYPE(x)]
+#endif
+
+
typedef struct objstr {
- void *base;
- unsigned int size;
+ unsigned int size; //this many bytes are allocated after this header
void *top;
struct objstr *next;
} objstr_t;
+typedef struct oidmidpair {
+ unsigned int oid;
+ unsigned int mid;
+} oidmidpair_t;
+
typedef struct transrecord {
- objstr_t *cache;
- hashtable_t *lookupTable;
+ objstr_t *cache;
+ chashtable_t *lookupTable;
+#ifdef COMPILER
+ struct ___Object___ * revertlist;
+#endif
} transrecord_t;
+// Structure is a shared structure that keeps track of responses from the participants
+typedef struct thread_response {
+ char rcv_status;
+} thread_response_t;
+
+// Structure that holds fixed data to be sent along with TRANS_REQUEST
+typedef struct fixed_data {
+ char control; /* control message */
+ char trans_id[TID_LEN]; /* transaction id */
+ int mcount; /* participant count */
+ unsigned int numread; /* no of objects read */
+ unsigned int nummod; /* no of objects modified */
+ unsigned int numcreated; /* no of objects created */
+ int sum_bytes; /* total bytes of modified objects in a transaction */
+} fixed_data_t;
+
+/* Structure that holds trans request information for each participant */
+typedef struct trans_req_data {
+ fixed_data_t f; /* Holds first few fixed bytes of data sent during TRANS_REQUEST protcol*/
+ unsigned int *listmid; /* Pointer to array holding list of participants */
+ char *objread; /* Pointer to array holding oid and version number of objects that are only read */
+ unsigned int *oidmod; /* Pointer to array holding oids of objects that are modified */
+ unsigned int *oidcreated; /* Pointer to array holding oids of objects that are newly created */
+} trans_req_data_t;
+
+/* Structure that holds information of objects that are not found in the participant
+ * and objs locked within a transaction during commit process */
+typedef struct trans_commit_data{
+ unsigned int *objlocked; /* Pointer to array holding oids of objects locked inside a transaction */
+ unsigned int *objnotfound; /* Pointer to array holding oids of objects not found on the participant machine */
+ unsigned int *objvernotmatch; /* Pointer to array holding oids whose version doesn't match on the participant machine */
+ void *modptr; /* Pointer to the address in the mainobject store of the participant that holds all modified objects */
+ int numlocked; /* no of objects locked */
+ int numnotfound; /* no of objects not found */
+ int numvernotmatch; /* no of objects whose version doesn't match */
+} trans_commit_data_t;
+
+
+#define PRINT_TID(PTR) printf("DEBUG -> %x %d\n", PTR->mid, PTR->thread_id);
+/* Structure for passing multiple arguments to a thread
+ * spawned to process each transaction on a machine */
+typedef struct thread_data_array {
+ int thread_id;
+ int mid;
+ trans_req_data_t *buffer; /* Holds trans request information sent to participants */
+ thread_response_t *recvmsg; /* Shared datastructure to keep track of the participants response to a trans request */
+ pthread_cond_t *threshold; /* Condition var to waking up a thread */
+ pthread_mutex_t *lock; /* Lock for counting participants response */
+ int *count; /* Variable to count responses from all participants to the TRANS_REQUEST protocol */
+ char *replyctrl; /* Shared ctrl message that stores the reply to be sent to participants, filled by decideResponse() */
+ char *replyretry; /* Shared variable that keep track if coordinator needs retry */
+ transrecord_t *rec; /* To send modified objects */
+} thread_data_array_t;
+
+
+//Structure for passing arguments to the local m/c thread
+typedef struct local_thread_data_array {
+ thread_data_array_t *tdata; /* Holds all the arguments send to a thread that is spawned when transaction commits */
+ trans_commit_data_t *transinfo; /* Holds information of objects locked and not found in the participant */
+} local_thread_data_array_t;
+
+//Structure to store mid and socketid information
+typedef struct midSocketInfo {
+ unsigned int mid; /* To communicate with mid use sockid in this data structure */
+ int sockid;
+} midSocketInfo_t;
+
/* Initialize main object store and lookup tables, start server thread. */
-void dstmInit(void);
+int dstmInit(void);
+void send_data(int fd, void *buf, int buflen);
+void recv_data(int fd, void *buf, int buflen);
+int recv_data_errorcode(int fd, void *buf, int buflen);
/* Prototypes for object header */
unsigned int getNewOID(void);
-unsigned int objSize(objheader_t *object);
-void objInsert(objheader_t *object); //copies object to main object store
-unsigned int objCreate(unsigned short type); //returns oid
/* end object header */
/* Prototypes for object store */
objstr_t *objstrCreate(unsigned int size); //size in bytes
void objstrDelete(objstr_t *store); //traverse and free entire list
void *objstrAlloc(objstr_t *store, unsigned int size); //size in bytes
+void clearObjStore(); // TODO:currently only clears the prefetch cache object store
/* end object store */
/* Prototypes for server portion */
-void *dstmListen();
+void *dstmListen(void *);
+int startlistening();
void *dstmAccept(void *);
+int readClientReq(trans_commit_data_t *, int);
+int processClientReq(fixed_data_t *, trans_commit_data_t *,unsigned int *, char *, void *, unsigned int *, int);
+char handleTransReq(fixed_data_t *, trans_commit_data_t *, unsigned int *, char *, void *, int);
+char decideCtrlMessage(fixed_data_t *, trans_commit_data_t *, int *, int *, int *, int *, int *, void *, unsigned int *, unsigned int *, int);
+int transCommitProcess(void *, unsigned int *, unsigned int *, int, int, int);
+void processReqNotify(unsigned int numoid, unsigned int *oid, unsigned short *version, unsigned int mid, unsigned int threadid);
/* end server portion */
/* Prototypes for transactions */
+/* Function called at beginning. Passes in the first parameter. */
+/* Returns 1 if this thread should run the main process */
+
+int dstmStartup(const char *);
+void transInit();
+int processConfigFile();
+void addHost(unsigned int);
+void mapObjMethod(unsigned short);
+
+void randomdelay();
transrecord_t *transStart();
-objheader_t *transRead(transrecord_t *record, unsigned int oid);
+objheader_t *transRead(transrecord_t *, unsigned int);
+objheader_t *transCreateObj(transrecord_t *, unsigned int); //returns oid header
int transCommit(transrecord_t *record); //return 0 if successful
-/* end transactions */
+void *transRequest(void *); //the C routine that the thread will execute when TRANS_REQUEST begins
+void decideResponse(thread_data_array_t *);// Coordinator decides what response to send to the participant
+char sendResponse(thread_data_array_t *, int); //Sends control message back to Participants
+void *getRemoteObj(transrecord_t *, unsigned int, unsigned int);// returns object header from main object store after object is copied into it from remote machine
+void *handleLocalReq(void *);//handles Local requests
+int transComProcess(local_thread_data_array_t *);
+int transAbortProcess(local_thread_data_array_t *);
+void transAbort(transrecord_t *trans);
+void sendPrefetchResponse(int sd, char *control, char *sendbuffer, int *size);
+void prefetch(int, unsigned int *, unsigned short *, short*);
+void *transPrefetch(void *);
+void *mcqProcess(void *);
+prefetchpile_t *foundLocal(char *);// returns node with prefetch elements(oids, offsets)
+int lookupObject(unsigned int * oid, short offset);
+int transPrefetchProcess(transrecord_t *, int **, short);
+void sendPrefetchReq(prefetchpile_t*, int);
+void sendPrefetchReqnew(prefetchpile_t*, int);
+int getPrefetchResponse(int);
+unsigned short getObjType(unsigned int oid);
+int startRemoteThread(unsigned int oid, unsigned int mid);
+int updatePrefetchCache(thread_data_array_t *, int, char);
-#endif
+
+/* Sends notification request for thread join, if sucessful returns 0 else returns -1 */
+int reqNotify(unsigned int *oidarry, unsigned short *versionarry, unsigned int numoid);
+void threadNotify(unsigned int oid, unsigned short version, unsigned int tid);
+int notifyAll(threadlist_t **head, unsigned int oid, unsigned int version);
+
+/* end transactions */
+#endif
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