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| 1 /* |
| 2 ** 2006 January 09 |
| 3 ** |
| 4 ** The author disclaims copyright to this source code. In place of |
| 5 ** a legal notice, here is a blessing: |
| 6 ** |
| 7 ** May you do good and not evil. |
| 8 ** May you find forgiveness for yourself and forgive others. |
| 9 ** May you share freely, never taking more than you give. |
| 10 ** |
| 11 ************************************************************************* |
| 12 ** Code for testing the client/server version of the SQLite library. |
| 13 ** Derived from test4.c. |
| 14 */ |
| 15 #include "sqliteInt.h" |
| 16 #include "tcl.h" |
| 17 |
| 18 /* |
| 19 ** This test only works on UNIX with a SQLITE_THREADSAFE build that includes |
| 20 ** the SQLITE_SERVER option. |
| 21 */ |
| 22 #if defined(SQLITE_SERVER) && !defined(SQLITE_OMIT_SHARED_CACHE) && \ |
| 23 SQLITE_OS_UNIX && SQLITE_THREADSAFE |
| 24 |
| 25 #include <stdlib.h> |
| 26 #include <string.h> |
| 27 #include <pthread.h> |
| 28 #include <sched.h> |
| 29 #include <ctype.h> |
| 30 |
| 31 /* |
| 32 ** Interfaces defined in server.c |
| 33 */ |
| 34 int sqlite3_client_open(const char*, sqlite3**); |
| 35 int sqlite3_client_prepare(sqlite3*,const char*,int, |
| 36 sqlite3_stmt**,const char**); |
| 37 int sqlite3_client_step(sqlite3_stmt*); |
| 38 int sqlite3_client_reset(sqlite3_stmt*); |
| 39 int sqlite3_client_finalize(sqlite3_stmt*); |
| 40 int sqlite3_client_close(sqlite3*); |
| 41 int sqlite3_server_start(void); |
| 42 int sqlite3_server_stop(void); |
| 43 |
| 44 /* |
| 45 ** Each thread is controlled by an instance of the following |
| 46 ** structure. |
| 47 */ |
| 48 typedef struct Thread Thread; |
| 49 struct Thread { |
| 50 /* The first group of fields are writable by the supervisor thread |
| 51 ** and read-only to the client threads |
| 52 */ |
| 53 char *zFilename; /* Name of database file */ |
| 54 void (*xOp)(Thread*); /* next operation to do */ |
| 55 char *zArg; /* argument usable by xOp */ |
| 56 volatile int opnum; /* Operation number */ |
| 57 volatile int busy; /* True if this thread is in use */ |
| 58 |
| 59 /* The next group of fields are writable by the client threads |
| 60 ** but read-only to the superviser thread. |
| 61 */ |
| 62 volatile int completed; /* Number of operations completed */ |
| 63 sqlite3 *db; /* Open database */ |
| 64 sqlite3_stmt *pStmt; /* Pending operation */ |
| 65 char *zErr; /* operation error */ |
| 66 char *zStaticErr; /* Static error message */ |
| 67 int rc; /* operation return code */ |
| 68 int argc; /* number of columns in result */ |
| 69 const char *argv[100]; /* result columns */ |
| 70 const char *colv[100]; /* result column names */ |
| 71 }; |
| 72 |
| 73 /* |
| 74 ** There can be as many as 26 threads running at once. Each is named |
| 75 ** by a capital letter: A, B, C, ..., Y, Z. |
| 76 */ |
| 77 #define N_THREAD 26 |
| 78 static Thread threadset[N_THREAD]; |
| 79 |
| 80 /* |
| 81 ** The main loop for a thread. Threads use busy waiting. |
| 82 */ |
| 83 static void *client_main(void *pArg){ |
| 84 Thread *p = (Thread*)pArg; |
| 85 if( p->db ){ |
| 86 sqlite3_client_close(p->db); |
| 87 } |
| 88 sqlite3_client_open(p->zFilename, &p->db); |
| 89 if( SQLITE_OK!=sqlite3_errcode(p->db) ){ |
| 90 p->zErr = strdup(sqlite3_errmsg(p->db)); |
| 91 sqlite3_client_close(p->db); |
| 92 p->db = 0; |
| 93 } |
| 94 p->pStmt = 0; |
| 95 p->completed = 1; |
| 96 while( p->opnum<=p->completed ) sched_yield(); |
| 97 while( p->xOp ){ |
| 98 if( p->zErr && p->zErr!=p->zStaticErr ){ |
| 99 sqlite3_free(p->zErr); |
| 100 p->zErr = 0; |
| 101 } |
| 102 (*p->xOp)(p); |
| 103 p->completed++; |
| 104 while( p->opnum<=p->completed ) sched_yield(); |
| 105 } |
| 106 if( p->pStmt ){ |
| 107 sqlite3_client_finalize(p->pStmt); |
| 108 p->pStmt = 0; |
| 109 } |
| 110 if( p->db ){ |
| 111 sqlite3_client_close(p->db); |
| 112 p->db = 0; |
| 113 } |
| 114 if( p->zErr && p->zErr!=p->zStaticErr ){ |
| 115 sqlite3_free(p->zErr); |
| 116 p->zErr = 0; |
| 117 } |
| 118 p->completed++; |
| 119 #ifndef SQLITE_OMIT_DEPRECATED |
| 120 sqlite3_thread_cleanup(); |
| 121 #endif |
| 122 return 0; |
| 123 } |
| 124 |
| 125 /* |
| 126 ** Get a thread ID which is an upper case letter. Return the index. |
| 127 ** If the argument is not a valid thread ID put an error message in |
| 128 ** the interpreter and return -1. |
| 129 */ |
| 130 static int parse_client_id(Tcl_Interp *interp, const char *zArg){ |
| 131 if( zArg==0 || zArg[0]==0 || zArg[1]!=0 || !isupper((unsigned char)zArg[0]) ){ |
| 132 Tcl_AppendResult(interp, "thread ID must be an upper case letter", 0); |
| 133 return -1; |
| 134 } |
| 135 return zArg[0] - 'A'; |
| 136 } |
| 137 |
| 138 /* |
| 139 ** Usage: client_create NAME FILENAME |
| 140 ** |
| 141 ** NAME should be an upper case letter. Start the thread running with |
| 142 ** an open connection to the given database. |
| 143 */ |
| 144 static int tcl_client_create( |
| 145 void *NotUsed, |
| 146 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ |
| 147 int argc, /* Number of arguments */ |
| 148 const char **argv /* Text of each argument */ |
| 149 ){ |
| 150 int i; |
| 151 pthread_t x; |
| 152 int rc; |
| 153 |
| 154 if( argc!=3 ){ |
| 155 Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 156 " ID FILENAME", 0); |
| 157 return TCL_ERROR; |
| 158 } |
| 159 i = parse_client_id(interp, argv[1]); |
| 160 if( i<0 ) return TCL_ERROR; |
| 161 if( threadset[i].busy ){ |
| 162 Tcl_AppendResult(interp, "thread ", argv[1], " is already running", 0); |
| 163 return TCL_ERROR; |
| 164 } |
| 165 threadset[i].busy = 1; |
| 166 sqlite3_free(threadset[i].zFilename); |
| 167 threadset[i].zFilename = sqlite3_mprintf("%s", argv[2]); |
| 168 threadset[i].opnum = 1; |
| 169 threadset[i].completed = 0; |
| 170 rc = pthread_create(&x, 0, client_main, &threadset[i]); |
| 171 if( rc ){ |
| 172 Tcl_AppendResult(interp, "failed to create the thread", 0); |
| 173 sqlite3_free(threadset[i].zFilename); |
| 174 threadset[i].busy = 0; |
| 175 return TCL_ERROR; |
| 176 } |
| 177 pthread_detach(x); |
| 178 sqlite3_server_start(); |
| 179 return TCL_OK; |
| 180 } |
| 181 |
| 182 /* |
| 183 ** Wait for a thread to reach its idle state. |
| 184 */ |
| 185 static void client_wait(Thread *p){ |
| 186 while( p->opnum>p->completed ) sched_yield(); |
| 187 } |
| 188 |
| 189 /* |
| 190 ** Usage: client_wait ID |
| 191 ** |
| 192 ** Wait on thread ID to reach its idle state. |
| 193 */ |
| 194 static int tcl_client_wait( |
| 195 void *NotUsed, |
| 196 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ |
| 197 int argc, /* Number of arguments */ |
| 198 const char **argv /* Text of each argument */ |
| 199 ){ |
| 200 int i; |
| 201 |
| 202 if( argc!=2 ){ |
| 203 Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 204 " ID", 0); |
| 205 return TCL_ERROR; |
| 206 } |
| 207 i = parse_client_id(interp, argv[1]); |
| 208 if( i<0 ) return TCL_ERROR; |
| 209 if( !threadset[i].busy ){ |
| 210 Tcl_AppendResult(interp, "no such thread", 0); |
| 211 return TCL_ERROR; |
| 212 } |
| 213 client_wait(&threadset[i]); |
| 214 return TCL_OK; |
| 215 } |
| 216 |
| 217 /* |
| 218 ** Stop a thread. |
| 219 */ |
| 220 static void stop_thread(Thread *p){ |
| 221 client_wait(p); |
| 222 p->xOp = 0; |
| 223 p->opnum++; |
| 224 client_wait(p); |
| 225 sqlite3_free(p->zArg); |
| 226 p->zArg = 0; |
| 227 sqlite3_free(p->zFilename); |
| 228 p->zFilename = 0; |
| 229 p->busy = 0; |
| 230 } |
| 231 |
| 232 /* |
| 233 ** Usage: client_halt ID |
| 234 ** |
| 235 ** Cause a client thread to shut itself down. Wait for the shutdown to be |
| 236 ** completed. If ID is "*" then stop all client threads. |
| 237 */ |
| 238 static int tcl_client_halt( |
| 239 void *NotUsed, |
| 240 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ |
| 241 int argc, /* Number of arguments */ |
| 242 const char **argv /* Text of each argument */ |
| 243 ){ |
| 244 int i; |
| 245 |
| 246 if( argc!=2 ){ |
| 247 Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 248 " ID", 0); |
| 249 return TCL_ERROR; |
| 250 } |
| 251 if( argv[1][0]=='*' && argv[1][1]==0 ){ |
| 252 for(i=0; i<N_THREAD; i++){ |
| 253 if( threadset[i].busy ){ |
| 254 stop_thread(&threadset[i]); |
| 255 } |
| 256 } |
| 257 }else{ |
| 258 i = parse_client_id(interp, argv[1]); |
| 259 if( i<0 ) return TCL_ERROR; |
| 260 if( !threadset[i].busy ){ |
| 261 Tcl_AppendResult(interp, "no such thread", 0); |
| 262 return TCL_ERROR; |
| 263 } |
| 264 stop_thread(&threadset[i]); |
| 265 } |
| 266 |
| 267 /* If no client threads are still running, also stop the server */ |
| 268 for(i=0; i<N_THREAD && threadset[i].busy==0; i++){} |
| 269 if( i>=N_THREAD ){ |
| 270 sqlite3_server_stop(); |
| 271 } |
| 272 return TCL_OK; |
| 273 } |
| 274 |
| 275 /* |
| 276 ** Usage: client_argc ID |
| 277 ** |
| 278 ** Wait on the most recent client_step to complete, then return the |
| 279 ** number of columns in the result set. |
| 280 */ |
| 281 static int tcl_client_argc( |
| 282 void *NotUsed, |
| 283 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ |
| 284 int argc, /* Number of arguments */ |
| 285 const char **argv /* Text of each argument */ |
| 286 ){ |
| 287 int i; |
| 288 char zBuf[100]; |
| 289 |
| 290 if( argc!=2 ){ |
| 291 Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 292 " ID", 0); |
| 293 return TCL_ERROR; |
| 294 } |
| 295 i = parse_client_id(interp, argv[1]); |
| 296 if( i<0 ) return TCL_ERROR; |
| 297 if( !threadset[i].busy ){ |
| 298 Tcl_AppendResult(interp, "no such thread", 0); |
| 299 return TCL_ERROR; |
| 300 } |
| 301 client_wait(&threadset[i]); |
| 302 sprintf(zBuf, "%d", threadset[i].argc); |
| 303 Tcl_AppendResult(interp, zBuf, 0); |
| 304 return TCL_OK; |
| 305 } |
| 306 |
| 307 /* |
| 308 ** Usage: client_argv ID N |
| 309 ** |
| 310 ** Wait on the most recent client_step to complete, then return the |
| 311 ** value of the N-th columns in the result set. |
| 312 */ |
| 313 static int tcl_client_argv( |
| 314 void *NotUsed, |
| 315 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ |
| 316 int argc, /* Number of arguments */ |
| 317 const char **argv /* Text of each argument */ |
| 318 ){ |
| 319 int i; |
| 320 int n; |
| 321 |
| 322 if( argc!=3 ){ |
| 323 Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 324 " ID N", 0); |
| 325 return TCL_ERROR; |
| 326 } |
| 327 i = parse_client_id(interp, argv[1]); |
| 328 if( i<0 ) return TCL_ERROR; |
| 329 if( !threadset[i].busy ){ |
| 330 Tcl_AppendResult(interp, "no such thread", 0); |
| 331 return TCL_ERROR; |
| 332 } |
| 333 if( Tcl_GetInt(interp, argv[2], &n) ) return TCL_ERROR; |
| 334 client_wait(&threadset[i]); |
| 335 if( n<0 || n>=threadset[i].argc ){ |
| 336 Tcl_AppendResult(interp, "column number out of range", 0); |
| 337 return TCL_ERROR; |
| 338 } |
| 339 Tcl_AppendResult(interp, threadset[i].argv[n], 0); |
| 340 return TCL_OK; |
| 341 } |
| 342 |
| 343 /* |
| 344 ** Usage: client_colname ID N |
| 345 ** |
| 346 ** Wait on the most recent client_step to complete, then return the |
| 347 ** name of the N-th columns in the result set. |
| 348 */ |
| 349 static int tcl_client_colname( |
| 350 void *NotUsed, |
| 351 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ |
| 352 int argc, /* Number of arguments */ |
| 353 const char **argv /* Text of each argument */ |
| 354 ){ |
| 355 int i; |
| 356 int n; |
| 357 |
| 358 if( argc!=3 ){ |
| 359 Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 360 " ID N", 0); |
| 361 return TCL_ERROR; |
| 362 } |
| 363 i = parse_client_id(interp, argv[1]); |
| 364 if( i<0 ) return TCL_ERROR; |
| 365 if( !threadset[i].busy ){ |
| 366 Tcl_AppendResult(interp, "no such thread", 0); |
| 367 return TCL_ERROR; |
| 368 } |
| 369 if( Tcl_GetInt(interp, argv[2], &n) ) return TCL_ERROR; |
| 370 client_wait(&threadset[i]); |
| 371 if( n<0 || n>=threadset[i].argc ){ |
| 372 Tcl_AppendResult(interp, "column number out of range", 0); |
| 373 return TCL_ERROR; |
| 374 } |
| 375 Tcl_AppendResult(interp, threadset[i].colv[n], 0); |
| 376 return TCL_OK; |
| 377 } |
| 378 |
| 379 /* |
| 380 ** Usage: client_result ID |
| 381 ** |
| 382 ** Wait on the most recent operation to complete, then return the |
| 383 ** result code from that operation. |
| 384 */ |
| 385 static int tcl_client_result( |
| 386 void *NotUsed, |
| 387 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ |
| 388 int argc, /* Number of arguments */ |
| 389 const char **argv /* Text of each argument */ |
| 390 ){ |
| 391 int i; |
| 392 const char *zName; |
| 393 |
| 394 if( argc!=2 ){ |
| 395 Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 396 " ID", 0); |
| 397 return TCL_ERROR; |
| 398 } |
| 399 i = parse_client_id(interp, argv[1]); |
| 400 if( i<0 ) return TCL_ERROR; |
| 401 if( !threadset[i].busy ){ |
| 402 Tcl_AppendResult(interp, "no such thread", 0); |
| 403 return TCL_ERROR; |
| 404 } |
| 405 client_wait(&threadset[i]); |
| 406 switch( threadset[i].rc ){ |
| 407 case SQLITE_OK: zName = "SQLITE_OK"; break; |
| 408 case SQLITE_ERROR: zName = "SQLITE_ERROR"; break; |
| 409 case SQLITE_PERM: zName = "SQLITE_PERM"; break; |
| 410 case SQLITE_ABORT: zName = "SQLITE_ABORT"; break; |
| 411 case SQLITE_BUSY: zName = "SQLITE_BUSY"; break; |
| 412 case SQLITE_LOCKED: zName = "SQLITE_LOCKED"; break; |
| 413 case SQLITE_NOMEM: zName = "SQLITE_NOMEM"; break; |
| 414 case SQLITE_READONLY: zName = "SQLITE_READONLY"; break; |
| 415 case SQLITE_INTERRUPT: zName = "SQLITE_INTERRUPT"; break; |
| 416 case SQLITE_IOERR: zName = "SQLITE_IOERR"; break; |
| 417 case SQLITE_CORRUPT: zName = "SQLITE_CORRUPT"; break; |
| 418 case SQLITE_FULL: zName = "SQLITE_FULL"; break; |
| 419 case SQLITE_CANTOPEN: zName = "SQLITE_CANTOPEN"; break; |
| 420 case SQLITE_PROTOCOL: zName = "SQLITE_PROTOCOL"; break; |
| 421 case SQLITE_EMPTY: zName = "SQLITE_EMPTY"; break; |
| 422 case SQLITE_SCHEMA: zName = "SQLITE_SCHEMA"; break; |
| 423 case SQLITE_CONSTRAINT: zName = "SQLITE_CONSTRAINT"; break; |
| 424 case SQLITE_MISMATCH: zName = "SQLITE_MISMATCH"; break; |
| 425 case SQLITE_MISUSE: zName = "SQLITE_MISUSE"; break; |
| 426 case SQLITE_NOLFS: zName = "SQLITE_NOLFS"; break; |
| 427 case SQLITE_AUTH: zName = "SQLITE_AUTH"; break; |
| 428 case SQLITE_FORMAT: zName = "SQLITE_FORMAT"; break; |
| 429 case SQLITE_RANGE: zName = "SQLITE_RANGE"; break; |
| 430 case SQLITE_ROW: zName = "SQLITE_ROW"; break; |
| 431 case SQLITE_DONE: zName = "SQLITE_DONE"; break; |
| 432 default: zName = "SQLITE_Unknown"; break; |
| 433 } |
| 434 Tcl_AppendResult(interp, zName, 0); |
| 435 return TCL_OK; |
| 436 } |
| 437 |
| 438 /* |
| 439 ** Usage: client_error ID |
| 440 ** |
| 441 ** Wait on the most recent operation to complete, then return the |
| 442 ** error string. |
| 443 */ |
| 444 static int tcl_client_error( |
| 445 void *NotUsed, |
| 446 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ |
| 447 int argc, /* Number of arguments */ |
| 448 const char **argv /* Text of each argument */ |
| 449 ){ |
| 450 int i; |
| 451 |
| 452 if( argc!=2 ){ |
| 453 Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 454 " ID", 0); |
| 455 return TCL_ERROR; |
| 456 } |
| 457 i = parse_client_id(interp, argv[1]); |
| 458 if( i<0 ) return TCL_ERROR; |
| 459 if( !threadset[i].busy ){ |
| 460 Tcl_AppendResult(interp, "no such thread", 0); |
| 461 return TCL_ERROR; |
| 462 } |
| 463 client_wait(&threadset[i]); |
| 464 Tcl_AppendResult(interp, threadset[i].zErr, 0); |
| 465 return TCL_OK; |
| 466 } |
| 467 |
| 468 /* |
| 469 ** This procedure runs in the thread to compile an SQL statement. |
| 470 */ |
| 471 static void do_compile(Thread *p){ |
| 472 if( p->db==0 ){ |
| 473 p->zErr = p->zStaticErr = "no database is open"; |
| 474 p->rc = SQLITE_ERROR; |
| 475 return; |
| 476 } |
| 477 if( p->pStmt ){ |
| 478 sqlite3_client_finalize(p->pStmt); |
| 479 p->pStmt = 0; |
| 480 } |
| 481 p->rc = sqlite3_client_prepare(p->db, p->zArg, -1, &p->pStmt, 0); |
| 482 } |
| 483 |
| 484 /* |
| 485 ** Usage: client_compile ID SQL |
| 486 ** |
| 487 ** Compile a new virtual machine. |
| 488 */ |
| 489 static int tcl_client_compile( |
| 490 void *NotUsed, |
| 491 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ |
| 492 int argc, /* Number of arguments */ |
| 493 const char **argv /* Text of each argument */ |
| 494 ){ |
| 495 int i; |
| 496 if( argc!=3 ){ |
| 497 Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 498 " ID SQL", 0); |
| 499 return TCL_ERROR; |
| 500 } |
| 501 i = parse_client_id(interp, argv[1]); |
| 502 if( i<0 ) return TCL_ERROR; |
| 503 if( !threadset[i].busy ){ |
| 504 Tcl_AppendResult(interp, "no such thread", 0); |
| 505 return TCL_ERROR; |
| 506 } |
| 507 client_wait(&threadset[i]); |
| 508 threadset[i].xOp = do_compile; |
| 509 sqlite3_free(threadset[i].zArg); |
| 510 threadset[i].zArg = sqlite3_mprintf("%s", argv[2]); |
| 511 threadset[i].opnum++; |
| 512 return TCL_OK; |
| 513 } |
| 514 |
| 515 /* |
| 516 ** This procedure runs in the thread to step the virtual machine. |
| 517 */ |
| 518 static void do_step(Thread *p){ |
| 519 int i; |
| 520 if( p->pStmt==0 ){ |
| 521 p->zErr = p->zStaticErr = "no virtual machine available"; |
| 522 p->rc = SQLITE_ERROR; |
| 523 return; |
| 524 } |
| 525 p->rc = sqlite3_client_step(p->pStmt); |
| 526 if( p->rc==SQLITE_ROW ){ |
| 527 p->argc = sqlite3_column_count(p->pStmt); |
| 528 for(i=0; i<sqlite3_data_count(p->pStmt); i++){ |
| 529 p->argv[i] = (char*)sqlite3_column_text(p->pStmt, i); |
| 530 } |
| 531 for(i=0; i<p->argc; i++){ |
| 532 p->colv[i] = sqlite3_column_name(p->pStmt, i); |
| 533 } |
| 534 } |
| 535 } |
| 536 |
| 537 /* |
| 538 ** Usage: client_step ID |
| 539 ** |
| 540 ** Advance the virtual machine by one step |
| 541 */ |
| 542 static int tcl_client_step( |
| 543 void *NotUsed, |
| 544 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ |
| 545 int argc, /* Number of arguments */ |
| 546 const char **argv /* Text of each argument */ |
| 547 ){ |
| 548 int i; |
| 549 if( argc!=2 ){ |
| 550 Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 551 " IDL", 0); |
| 552 return TCL_ERROR; |
| 553 } |
| 554 i = parse_client_id(interp, argv[1]); |
| 555 if( i<0 ) return TCL_ERROR; |
| 556 if( !threadset[i].busy ){ |
| 557 Tcl_AppendResult(interp, "no such thread", 0); |
| 558 return TCL_ERROR; |
| 559 } |
| 560 client_wait(&threadset[i]); |
| 561 threadset[i].xOp = do_step; |
| 562 threadset[i].opnum++; |
| 563 return TCL_OK; |
| 564 } |
| 565 |
| 566 /* |
| 567 ** This procedure runs in the thread to finalize a virtual machine. |
| 568 */ |
| 569 static void do_finalize(Thread *p){ |
| 570 if( p->pStmt==0 ){ |
| 571 p->zErr = p->zStaticErr = "no virtual machine available"; |
| 572 p->rc = SQLITE_ERROR; |
| 573 return; |
| 574 } |
| 575 p->rc = sqlite3_client_finalize(p->pStmt); |
| 576 p->pStmt = 0; |
| 577 } |
| 578 |
| 579 /* |
| 580 ** Usage: client_finalize ID |
| 581 ** |
| 582 ** Finalize the virtual machine. |
| 583 */ |
| 584 static int tcl_client_finalize( |
| 585 void *NotUsed, |
| 586 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ |
| 587 int argc, /* Number of arguments */ |
| 588 const char **argv /* Text of each argument */ |
| 589 ){ |
| 590 int i; |
| 591 if( argc!=2 ){ |
| 592 Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 593 " IDL", 0); |
| 594 return TCL_ERROR; |
| 595 } |
| 596 i = parse_client_id(interp, argv[1]); |
| 597 if( i<0 ) return TCL_ERROR; |
| 598 if( !threadset[i].busy ){ |
| 599 Tcl_AppendResult(interp, "no such thread", 0); |
| 600 return TCL_ERROR; |
| 601 } |
| 602 client_wait(&threadset[i]); |
| 603 threadset[i].xOp = do_finalize; |
| 604 sqlite3_free(threadset[i].zArg); |
| 605 threadset[i].zArg = 0; |
| 606 threadset[i].opnum++; |
| 607 return TCL_OK; |
| 608 } |
| 609 |
| 610 /* |
| 611 ** This procedure runs in the thread to reset a virtual machine. |
| 612 */ |
| 613 static void do_reset(Thread *p){ |
| 614 if( p->pStmt==0 ){ |
| 615 p->zErr = p->zStaticErr = "no virtual machine available"; |
| 616 p->rc = SQLITE_ERROR; |
| 617 return; |
| 618 } |
| 619 p->rc = sqlite3_client_reset(p->pStmt); |
| 620 p->pStmt = 0; |
| 621 } |
| 622 |
| 623 /* |
| 624 ** Usage: client_reset ID |
| 625 ** |
| 626 ** Finalize the virtual machine. |
| 627 */ |
| 628 static int tcl_client_reset( |
| 629 void *NotUsed, |
| 630 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ |
| 631 int argc, /* Number of arguments */ |
| 632 const char **argv /* Text of each argument */ |
| 633 ){ |
| 634 int i; |
| 635 if( argc!=2 ){ |
| 636 Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 637 " IDL", 0); |
| 638 return TCL_ERROR; |
| 639 } |
| 640 i = parse_client_id(interp, argv[1]); |
| 641 if( i<0 ) return TCL_ERROR; |
| 642 if( !threadset[i].busy ){ |
| 643 Tcl_AppendResult(interp, "no such thread", 0); |
| 644 return TCL_ERROR; |
| 645 } |
| 646 client_wait(&threadset[i]); |
| 647 threadset[i].xOp = do_reset; |
| 648 sqlite3_free(threadset[i].zArg); |
| 649 threadset[i].zArg = 0; |
| 650 threadset[i].opnum++; |
| 651 return TCL_OK; |
| 652 } |
| 653 |
| 654 /* |
| 655 ** Usage: client_swap ID ID |
| 656 ** |
| 657 ** Interchange the sqlite* pointer between two threads. |
| 658 */ |
| 659 static int tcl_client_swap( |
| 660 void *NotUsed, |
| 661 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ |
| 662 int argc, /* Number of arguments */ |
| 663 const char **argv /* Text of each argument */ |
| 664 ){ |
| 665 int i, j; |
| 666 sqlite3 *temp; |
| 667 if( argc!=3 ){ |
| 668 Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 669 " ID1 ID2", 0); |
| 670 return TCL_ERROR; |
| 671 } |
| 672 i = parse_client_id(interp, argv[1]); |
| 673 if( i<0 ) return TCL_ERROR; |
| 674 if( !threadset[i].busy ){ |
| 675 Tcl_AppendResult(interp, "no such thread", 0); |
| 676 return TCL_ERROR; |
| 677 } |
| 678 client_wait(&threadset[i]); |
| 679 j = parse_client_id(interp, argv[2]); |
| 680 if( j<0 ) return TCL_ERROR; |
| 681 if( !threadset[j].busy ){ |
| 682 Tcl_AppendResult(interp, "no such thread", 0); |
| 683 return TCL_ERROR; |
| 684 } |
| 685 client_wait(&threadset[j]); |
| 686 temp = threadset[i].db; |
| 687 threadset[i].db = threadset[j].db; |
| 688 threadset[j].db = temp; |
| 689 return TCL_OK; |
| 690 } |
| 691 |
| 692 /* |
| 693 ** Register commands with the TCL interpreter. |
| 694 */ |
| 695 int Sqlitetest7_Init(Tcl_Interp *interp){ |
| 696 static struct { |
| 697 char *zName; |
| 698 Tcl_CmdProc *xProc; |
| 699 } aCmd[] = { |
| 700 { "client_create", (Tcl_CmdProc*)tcl_client_create }, |
| 701 { "client_wait", (Tcl_CmdProc*)tcl_client_wait }, |
| 702 { "client_halt", (Tcl_CmdProc*)tcl_client_halt }, |
| 703 { "client_argc", (Tcl_CmdProc*)tcl_client_argc }, |
| 704 { "client_argv", (Tcl_CmdProc*)tcl_client_argv }, |
| 705 { "client_colname", (Tcl_CmdProc*)tcl_client_colname }, |
| 706 { "client_result", (Tcl_CmdProc*)tcl_client_result }, |
| 707 { "client_error", (Tcl_CmdProc*)tcl_client_error }, |
| 708 { "client_compile", (Tcl_CmdProc*)tcl_client_compile }, |
| 709 { "client_step", (Tcl_CmdProc*)tcl_client_step }, |
| 710 { "client_reset", (Tcl_CmdProc*)tcl_client_reset }, |
| 711 { "client_finalize", (Tcl_CmdProc*)tcl_client_finalize }, |
| 712 { "client_swap", (Tcl_CmdProc*)tcl_client_swap }, |
| 713 }; |
| 714 int i; |
| 715 |
| 716 for(i=0; i<sizeof(aCmd)/sizeof(aCmd[0]); i++){ |
| 717 Tcl_CreateCommand(interp, aCmd[i].zName, aCmd[i].xProc, 0, 0); |
| 718 } |
| 719 return TCL_OK; |
| 720 } |
| 721 #else |
| 722 int Sqlitetest7_Init(Tcl_Interp *interp){ return TCL_OK; } |
| 723 #endif /* SQLITE_OS_UNIX */ |
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