8 #define GET_NTUPLES(x) ((int *)(x + sizeof(prefetchqelem_t)))
9 #define GET_PTR_OID(x) ((unsigned int *)(x + sizeof(prefetchqelem_t) + sizeof(int)))
10 #define GET_PTR_EOFF(x,n) ((short *)(x + sizeof(prefetchqelem_t) + sizeof(int) + (n*sizeof(unsigned int))))
11 #define GET_PTR_ARRYFLD(x,n) ((short *)(x + sizeof(prefetchqelem_t) + sizeof(int) + (n*sizeof(unsigned int)) + (n*sizeof(short))))
14 //Coordinator Messages
15 #define READ_REQUEST 1
16 #define READ_MULT_REQUEST 2
17 #define MOVE_REQUEST 3
18 #define MOVE_MULT_REQUEST 4
19 #define TRANS_REQUEST 5
21 #define TRANS_COMMIT 7
22 #define TRANS_PREFETCH 8
23 #define TRANS_ABORT_BUT_RETRY_COMMIT_WITH_RELOCATING 9
25 //Participant Messages
26 #define OBJECT_FOUND 10
27 #define OBJECT_NOT_FOUND 11
28 #define OBJECTS_FOUND 12
29 #define OBJECTS_NOT_FOUND 13
30 #define TRANS_AGREE 17
31 #define TRANS_DISAGREE 18
32 #define TRANS_AGREE_BUT_MISSING_OBJECTS 19
33 #define TRANS_SOFT_ABORT 20
34 #define TRANS_SUCESSFUL 21
36 //Control bits for status of objects in Machine pile
37 #define OBJ_LOCKED_BUT_VERSION_MATCH 14
38 #define OBJ_UNLOCK_BUT_VERSION_MATCH 15
39 #define VERSION_NO_MATCH 16
41 //Max number of objects
42 #define MAX_OBJECTS 20
53 #define DEFAULT_OBJ_STORE_SIZE 1048510 //1MB
55 //bit designations for status field of objheader
61 typedef struct objheader {
64 unsigned short version;
65 unsigned short rcount;
69 typedef struct objstr {
70 unsigned int size; //this many bytes are allocated after this header
75 typedef struct transrecord {
77 chashtable_t *lookupTable;
79 // Structure that keeps track of responses from the participants
80 typedef struct thread_response {
84 // Structure that holds fixed data sizes to be sent along with TRANS_REQUEST
85 typedef struct fixed_data {
87 char trans_id[TID_LEN];
88 int mcount; // Machine count
89 short numread; // Number of objects read
90 short nummod; // Number of objects modified
91 int sum_bytes; // Total bytes modified
94 // Structure that holds variable data sizes per machine participant
95 typedef struct trans_req_data {
97 unsigned int *listmid;
102 // Structure passed to dstmAcceptinfo() on server side to complete TRANS_COMMIT process
103 typedef struct trans_commit_data{
104 unsigned int *objmod;
105 unsigned int *objlocked;
106 unsigned int *objnotfound;
111 }trans_commit_data_t;
114 #define PRINT_TID(PTR) printf("DEBUG -> %x %d\n", PTR->mid, PTR->thread_id);
115 //structure for passing multiple arguments to thread
116 typedef struct thread_data_array {
120 trans_req_data_t *buffer;
121 thread_response_t *recvmsg;//shared datastructure to keep track of the control message receiv
122 pthread_cond_t *threshold; //threshhold for waking up a thread
123 pthread_mutex_t *lock; //lock the count variable
124 int *count; //variable to count responses of TRANS_REQUEST protocol from all participants
125 char *replyctrl; //shared ctrl message that stores the reply to be sent, filled by decideResp
126 char *replyretry; //shared variable to find out if we need retry (TRANS_COMMIT case)
127 transrecord_t *rec; // To send modified objects
128 } thread_data_array_t;
131 //Structure for passing arguments to the local m/c thread
132 typedef struct local_thread_data_array {
133 thread_data_array_t *tdata;
134 trans_commit_data_t *transinfo; //Required for trans commit process
135 } local_thread_data_array_t;
137 // Structure to save information about an oid necesaary for the decideControl()
138 typedef struct objinfo {
140 int poss_val; //Status of object(locked but version matches, version mismatch, oid not present in machine etc)
143 //Structure for members within prefetch tuples
144 typedef struct member {
151 //Structure that holds the compiler generated prefetch data
152 typedef struct compprefetchdata {
153 transrecord_t *record;
154 } compprefetchdata_t;
157 /* Initialize main object store and lookup tables, start server thread. */
160 /* Prototypes for object header */
161 unsigned int getNewOID(void);
162 unsigned int objSize(objheader_t *object);
163 /* end object header */
165 /* Prototypes for object store */
166 objstr_t *objstrCreate(unsigned int size); //size in bytes
167 void objstrDelete(objstr_t *store); //traverse and free entire list
168 void *objstrAlloc(objstr_t *store, unsigned int size); //size in bytes
169 /* end object store */
171 /* Prototypes for server portion */
173 void *dstmAccept(void *);
174 int readClientReq(trans_commit_data_t *, int);
175 int processClientReq(fixed_data_t *, trans_commit_data_t *,unsigned int *, char *, void *, int);
176 char handleTransReq(fixed_data_t *, trans_commit_data_t *, unsigned int *, char *, void *, int);
177 int decideCtrlMessage(fixed_data_t *, trans_commit_data_t *, int *, int *, int *, int *, int *, void *, unsigned int *, unsigned int *, unsigned int *, int);
178 int transCommitProcess(trans_commit_data_t *, int);
179 /* end server portion */
181 /* Prototypes for transactions */
182 void randomdelay(void);
183 transrecord_t *transStart();
184 objheader_t *transRead(transrecord_t *, unsigned int);
185 objheader_t *transCreateObj(transrecord_t *, unsigned short); //returns oid
186 int transCommit(transrecord_t *record); //return 0 if successful
187 void *transRequest(void *); //the C routine that the thread will execute when TRANS_REQUEST begins
188 void *handleLocalReq(void *); //the C routine that the local m/c thread will execute
189 int decideResponse(thread_data_array_t *);// Coordinator decides what response to send to the participant
190 char sendResponse(thread_data_array_t *, int); //Sends control message back to Participants
191 void *getRemoteObj(transrecord_t *, unsigned int, unsigned int);
192 int transAbortProcess(void *, unsigned int *, int, int, int);
193 int transComProcess(trans_commit_data_t *);
194 void prefetch(int, unsigned int *, short *, short*);
195 void *transPrefetch(void *);
196 void checkPrefetchTuples(prefetchqelem_t *);
197 void foundLocal(prefetchqelem_t *);
198 void makePreGroups(prefetchqelem_t *node);
199 void checkPreCache(prefetchqelem_t *, int *, int, int, unsigned int, int, int, int);
200 int transPrefetchProcess(transrecord_t *, int **, short);
201 void *sendPrefetchReq(void *);
202 /* end transactions */