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
35 #define TRANS_PREFETCH_RESPONSE 22
37 //Control bits for status of objects in Machine pile
38 #define OBJ_LOCKED_BUT_VERSION_MATCH 14
39 #define OBJ_UNLOCK_BUT_VERSION_MATCH 15
40 #define VERSION_NO_MATCH 16
42 //Max number of objects
43 #define MAX_OBJECTS 20
54 #define DEFAULT_OBJ_STORE_SIZE 1048510 //1MB
56 //bit designations for status field of objheader
64 #include "structdefs.h"
66 typedef struct objheader {
67 unsigned short version;
68 unsigned short rcount;
72 *((unsigned int *)&((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___nextobject___)
75 *((unsigned int *) &(((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___localcopy___))
78 ((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->type
82 typedef struct objheader {
85 unsigned short version;
86 unsigned short rcount;
91 #define TYPE(x) x->type
92 #define STATUS(x) x->status
97 typedef struct objstr {
98 unsigned int size; //this many bytes are allocated after this header
103 typedef struct transrecord {
105 chashtable_t *lookupTable;
107 struct ___Object___ * revertlist;
110 // Structure that keeps track of responses from the participants
111 typedef struct thread_response {
115 // Structure that holds fixed data sizes to be sent along with TRANS_REQUEST
116 typedef struct fixed_data {
118 char trans_id[TID_LEN];
119 int mcount; // Machine count
120 short numread; // Number of objects read
121 short nummod; // Number of objects modified
122 int sum_bytes; // Total bytes modified
125 // Structure that holds variable data sizes per machine participant
126 typedef struct trans_req_data {
128 unsigned int *listmid;
130 unsigned int *oidmod;
133 // Structure passed to dstmAcceptinfo() on server side to complete TRANS_COMMIT process
135 typedef struct trans_commit_data{
136 unsigned int *objmod;
137 unsigned int *objlocked;
138 unsigned int *objnotfound;
143 } trans_commit_data_t;
146 #define PRINT_TID(PTR) printf("DEBUG -> %x %d\n", PTR->mid, PTR->thread_id);
147 //structure for passing multiple arguments to thread
148 typedef struct thread_data_array {
152 trans_req_data_t *buffer;
153 thread_response_t *recvmsg;//shared datastructure to keep track of the control message receiv
154 pthread_cond_t *threshold; //threshhold for waking up a thread
155 pthread_mutex_t *lock; //lock the count variable
156 int *count; //variable to count responses of TRANS_REQUEST protocol from all participants
157 char *replyctrl; //shared ctrl message that stores the reply to be sent, filled by decideResp
158 char *replyretry; //shared variable to find out if we need retry (TRANS_COMMIT case)
159 transrecord_t *rec; // To send modified objects
160 } thread_data_array_t;
163 //Structure for passing arguments to the local m/c thread
164 typedef struct local_thread_data_array {
165 thread_data_array_t *tdata;
166 trans_commit_data_t *transinfo; //Required for trans commit process
167 } local_thread_data_array_t;
169 // Structure to save information about an oid necesaary for the decideControl()
170 typedef struct objinfo {
172 int poss_val; //Status of object(locked but version matches, version mismatch, oid not present in machine etc)
175 //Structure for members within prefetch tuples
176 typedef struct member {
183 //Structure that holds the compiler generated prefetch data
184 typedef struct compprefetchdata {
185 transrecord_t *record;
186 } compprefetchdata_t;
189 /* Initialize main object store and lookup tables, start server thread. */
192 /* Prototypes for object header */
193 unsigned int getNewOID(void);
194 unsigned int objSize(objheader_t *object);
195 /* end object header */
197 /* Prototypes for object store */
198 objstr_t *objstrCreate(unsigned int size); //size in bytes
199 void objstrDelete(objstr_t *store); //traverse and free entire list
200 void *objstrAlloc(objstr_t *store, unsigned int size); //size in bytes
201 /* end object store */
203 /* Prototypes for server portion */
205 void *dstmAccept(void *);
206 int readClientReq(trans_commit_data_t *, int);
207 int processClientReq(fixed_data_t *, trans_commit_data_t *,unsigned int *, char *, void *, int);
208 char handleTransReq(fixed_data_t *, trans_commit_data_t *, unsigned int *, char *, void *, int);
209 int decideCtrlMessage(fixed_data_t *, trans_commit_data_t *, int *, int *, int *, int *, int *, void *, unsigned int *, unsigned int *, unsigned int *, int);
210 int transCommitProcess(trans_commit_data_t *, int);
211 /* end server portion */
213 /* Prototypes for transactions */
214 /* Function called at beginning. Passes in the first parameter. */
215 /* Returns 1 if this thread should run the main process */
217 int dstmStartup(const char *);
220 void randomdelay(void);
221 transrecord_t *transStart();
222 objheader_t *transRead(transrecord_t *, unsigned int);
223 objheader_t *transCreateObj(transrecord_t *, unsigned short); //returns oid
224 int transCommit(transrecord_t *record); //return 0 if successful
225 void *transRequest(void *); //the C routine that the thread will execute when TRANS_REQUEST begins
226 void *handleLocalReq(void *); //the C routine that the local m/c thread will execute
227 int decideResponse(thread_data_array_t *);// Coordinator decides what response to send to the participant
228 char sendResponse(thread_data_array_t *, int); //Sends control message back to Participants
229 void *getRemoteObj(transrecord_t *, unsigned int, unsigned int);
230 int transAbortProcess(void *, unsigned int *, int, int, int);
231 int transComProcess(trans_commit_data_t *);
232 void prefetch(int, unsigned int *, short *, short*);
233 void *transPrefetch(void *);
234 void *mcqProcess(void *);
235 void checkPrefetchTuples(prefetchqelem_t *);
236 prefetchpile_t *foundLocal(prefetchqelem_t *);
237 prefetchpile_t *makePreGroups(prefetchqelem_t *, int *);
238 void checkPreCache(prefetchqelem_t *, int *, int, int, unsigned int, int, int, int);
239 int transPrefetchProcess(transrecord_t *, int **, short);
240 void sendPrefetchReq(prefetchpile_t*, int);
241 void getPrefetchResponse(int, int);
242 /* end transactions */