8 /***********************************************************
10 **********************************************************/
11 #define GET_NTUPLES(x) ((int *)(x))
12 #define GET_PTR_OID(x) ((unsigned int *)(x + sizeof(int)))
13 #define GET_PTR_EOFF(x,n) ((short *)(x + sizeof(int) + (n*sizeof(unsigned int))))
14 #define GET_PTR_ARRYFLD(x,n) ((short *)(x + sizeof(int) + (n*sizeof(unsigned int)) + (n*sizeof(short))))
15 #define ENDEBUG(s) { printf("Inside %s()\n", s); fflush(stdout);}
16 #define EXDEBUG(s) {printf("Outside %s()\n", s); fflush(stdout);}
17 /*****************************************
18 * Coordinator Messages
19 ***************************************/
20 #define READ_REQUEST 1
21 #define READ_MULT_REQUEST 2
22 #define MOVE_REQUEST 3
23 #define MOVE_MULT_REQUEST 4
24 #define TRANS_REQUEST 5
26 #define TRANS_COMMIT 7
27 #define TRANS_PREFETCH 8
28 #define TRANS_ABORT_BUT_RETRY_COMMIT_WITH_RELOCATING 9
30 /*********************************
31 * Participant Messages
32 *******************************/
33 #define OBJECT_FOUND 10
34 #define OBJECT_NOT_FOUND 11
35 #define OBJECTS_FOUND 12
36 #define OBJECTS_NOT_FOUND 13
37 #define TRANS_AGREE 17
38 #define TRANS_DISAGREE 18
39 #define TRANS_AGREE_BUT_MISSING_OBJECTS 19
40 #define TRANS_SOFT_ABORT 20
41 #define TRANS_SUCESSFUL 21
42 #define TRANS_PREFETCH_RESPONSE 22
43 #define START_REMOTE_THREAD 23
44 #define THREAD_NOTIFY_REQUEST 24
45 #define THREAD_NOTIFY_RESPONSE 25
46 #define TRANS_UNSUCESSFUL 26
47 #define CLOSE_CONNECTION 27
49 //Max number of objects
50 #define MAX_OBJECTS 20
51 //Max remote-machine connections
52 #define NUM_MACHINES 2
53 #define LOADFACTOR 0.5
54 #define DEFAULT_OBJ_STORE_SIZE 1048510 //1MB
55 //Transaction id per machine
57 #define LISTEN_PORT 2156
68 #include "threadnotify.h"
69 #include <arpa/inet.h>
70 #include <sys/types.h>
71 #include <sys/socket.h>
72 #include <sys/ioctl.h>
75 #include <netinet/in.h>
76 #include <sys/types.h>
81 #include "prelookup.h"
84 //bit designations for status field of objheader
90 /*******Global statistics *********/
91 extern int numprefetchsites;
95 #include "structdefs.h"
97 typedef struct objheader {
98 threadlist_t *notifylist;
99 unsigned short version;
100 unsigned short rcount;
104 (*((unsigned int *)&((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___nextobject___))
107 (*((unsigned int *)&((struct ___Object___ *) x)->___nextobject___))
110 *((unsigned int *) &(((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___localcopy___))
112 #define STATUSPTR(x)\
113 ((unsigned int *) &(((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___localcopy___))
116 ((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->type
118 #define GETSIZE(size, x) {\
120 if (type<NUMCLASSES) {\
121 size=classsize[type];\
123 size=classsize[type]*((struct ArrayObject *)&((objheader_t *)x)[1])->___length___+sizeof(struct ArrayObject);\
129 typedef struct objheader {
130 threadlist_t *notifylist;
133 unsigned short version;
134 unsigned short rcount;
138 #define OID(x) x->oid
139 #define TYPE(x) x->type
140 #define STATUS(x) x->status
141 #define STATUSPTR(x) &x->status
142 #define GETSIZE(size, x) size=classsize[TYPE(x)]
146 typedef struct objstr {
147 unsigned int size; //this many bytes are allocated after this header
152 typedef struct oidmidpair {
157 typedef struct transrecord {
159 chashtable_t *lookupTable;
161 struct ___Object___ * revertlist;
165 // Structure is a shared structure that keeps track of responses from the participants
166 typedef struct thread_response {
170 // Structure that holds fixed data to be sent along with TRANS_REQUEST
171 typedef struct fixed_data {
172 char control; /* control message */
173 char trans_id[TID_LEN]; /* transaction id */
174 int mcount; /* participant count */
175 unsigned int numread; /* no of objects read */
176 unsigned int nummod; /* no of objects modified */
177 unsigned int numcreated; /* no of objects created */
178 int sum_bytes; /* total bytes of modified objects in a transaction */
181 /* Structure that holds trans request information for each participant */
182 typedef struct trans_req_data {
183 fixed_data_t f; /* Holds first few fixed bytes of data sent during TRANS_REQUEST protcol*/
184 unsigned int *listmid; /* Pointer to array holding list of participants */
185 char *objread; /* Pointer to array holding oid and version number of objects that are only read */
186 unsigned int *oidmod; /* Pointer to array holding oids of objects that are modified */
187 unsigned int *oidcreated; /* Pointer to array holding oids of objects that are newly created */
190 /* Structure that holds information of objects that are not found in the participant
191 * and objs locked within a transaction during commit process */
192 typedef struct trans_commit_data{
193 unsigned int *objlocked; /* Pointer to array holding oids of objects locked inside a transaction */
194 unsigned int *objnotfound; /* Pointer to array holding oids of objects not found on the participant machine */
195 unsigned int *objvernotmatch; /* Pointer to array holding oids whose version doesn't match on the participant machine */
196 void *modptr; /* Pointer to the address in the mainobject store of the participant that holds all modified objects */
197 int numlocked; /* no of objects locked */
198 int numnotfound; /* no of objects not found */
199 int numvernotmatch; /* no of objects whose version doesn't match */
200 } trans_commit_data_t;
203 #define PRINT_TID(PTR) printf("DEBUG -> %x %d\n", PTR->mid, PTR->thread_id);
204 /* Structure for passing multiple arguments to a thread
205 * spawned to process each transaction on a machine */
206 typedef struct thread_data_array {
209 trans_req_data_t *buffer; /* Holds trans request information sent to participants */
210 thread_response_t *recvmsg; /* Shared datastructure to keep track of the participants response to a trans request */
211 pthread_cond_t *threshold; /* Condition var to waking up a thread */
212 pthread_mutex_t *lock; /* Lock for counting participants response */
213 int *count; /* Variable to count responses from all participants to the TRANS_REQUEST protocol */
214 char *replyctrl; /* Shared ctrl message that stores the reply to be sent to participants, filled by decideResponse() */
215 char *replyretry; /* Shared variable that keep track if coordinator needs retry */
216 transrecord_t *rec; /* To send modified objects */
217 } thread_data_array_t;
220 //Structure for passing arguments to the local m/c thread
221 typedef struct local_thread_data_array {
222 thread_data_array_t *tdata; /* Holds all the arguments send to a thread that is spawned when transaction commits */
223 trans_commit_data_t *transinfo; /* Holds information of objects locked and not found in the participant */
224 } local_thread_data_array_t;
226 //Structure to store mid and socketid information
227 typedef struct midSocketInfo {
228 unsigned int mid; /* To communicate with mid use sockid in this data structure */
232 /* Initialize main object store and lookup tables, start server thread. */
234 void send_data(int fd, void *buf, int buflen);
235 void recv_data(int fd, void *buf, int buflen);
236 int recv_data_errorcode(int fd, void *buf, int buflen);
238 /* Prototypes for object header */
239 unsigned int getNewOID(void);
240 /* end object header */
242 /* Prototypes for object store */
243 objstr_t *objstrCreate(unsigned int size); //size in bytes
244 void objstrDelete(objstr_t *store); //traverse and free entire list
245 void *objstrAlloc(objstr_t *store, unsigned int size); //size in bytes
246 void clearObjStore(); // TODO:currently only clears the prefetch cache object store
247 /* end object store */
249 /* Prototypes for server portion */
250 void *dstmListen(void *);
251 int startlistening();
252 void *dstmAccept(void *);
253 int readClientReq(trans_commit_data_t *, int);
254 int processClientReq(fixed_data_t *, trans_commit_data_t *,unsigned int *, char *, void *, unsigned int *, int);
255 char handleTransReq(fixed_data_t *, trans_commit_data_t *, unsigned int *, char *, void *, int);
256 char decideCtrlMessage(fixed_data_t *, trans_commit_data_t *, int *, int *, int *, int *, int *, void *, unsigned int *, unsigned int *, int);
257 int transCommitProcess(void *, unsigned int *, unsigned int *, int, int, int);
258 void processReqNotify(unsigned int numoid, unsigned int *oid, unsigned short *version, unsigned int mid, unsigned int threadid);
259 /* end server portion */
261 /* Prototypes for transactions */
262 /* Function called at beginning. Passes in the first parameter. */
263 /* Returns 1 if this thread should run the main process */
265 int dstmStartup(const char *);
267 int processConfigFile();
268 void addHost(unsigned int);
269 void mapObjMethod(unsigned short);
272 transrecord_t *transStart();
273 objheader_t *transRead(transrecord_t *, unsigned int);
274 objheader_t *transCreateObj(transrecord_t *, unsigned int); //returns oid header
275 int transCommit(transrecord_t *record); //return 0 if successful
276 void *transRequest(void *); //the C routine that the thread will execute when TRANS_REQUEST begins
277 void decideResponse(thread_data_array_t *);// Coordinator decides what response to send to the participant
278 char sendResponse(thread_data_array_t *, int); //Sends control message back to Participants
279 void *getRemoteObj(transrecord_t *, unsigned int, unsigned int);// returns object header from main object store after object is copied into it from remote machine
280 void *handleLocalReq(void *);//handles Local requests
281 int transComProcess(local_thread_data_array_t *);
282 int transAbortProcess(local_thread_data_array_t *);
283 void transAbort(transrecord_t *trans);
284 void sendPrefetchResponse(int sd, char *control, char *sendbuffer, int *size);
285 void prefetch(int, unsigned int *, unsigned short *, short*);
286 void *transPrefetch(void *);
287 void *mcqProcess(void *);
288 prefetchpile_t *foundLocal(char *);// returns node with prefetch elements(oids, offsets)
289 int lookupObject(unsigned int * oid, short offset);
290 int transPrefetchProcess(transrecord_t *, int **, short);
291 void sendPrefetchReq(prefetchpile_t*, int);
292 void sendPrefetchReqnew(prefetchpile_t*, int);
293 int getPrefetchResponse(int);
294 unsigned short getObjType(unsigned int oid);
295 int startRemoteThread(unsigned int oid, unsigned int mid);
296 int updatePrefetchCache(thread_data_array_t *, int, char);
300 /* Sends notification request for thread join, if sucessful returns 0 else returns -1 */
301 int reqNotify(unsigned int *oidarry, unsigned short *versionarry, unsigned int numoid);
302 void threadNotify(unsigned int oid, unsigned short version, unsigned int tid);
303 int notifyAll(threadlist_t **head, unsigned int oid, unsigned int version);
305 /* end transactions */