1 /* 2 * Copyright (c) 2016-present, Przemyslaw Skibinski, Yann Collet, Facebook, Inc. 3 * All rights reserved. 4 * 5 * This source code is licensed under both the BSD-style license (found in the 6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found 7 * in the COPYING file in the root directory of this source tree). 8 * You may select, at your option, one of the above-listed licenses. 9 */ 10 11 #ifndef UTIL_H_MODULE 12 #define UTIL_H_MODULE 13 14 #if defined (__cplusplus) 15 extern "C" { 16 #endif 17 18 19 20 /*-**************************************** 21 * Dependencies 22 ******************************************/ 23 #include "platform.h" /* PLATFORM_POSIX_VERSION */ 24 #include <stdlib.h> /* malloc */ 25 #include <stddef.h> /* size_t, ptrdiff_t */ 26 #include <stdio.h> /* fprintf */ 27 #include <string.h> /* strncmp */ 28 #include <sys/types.h> /* stat, utime */ 29 #include <sys/stat.h> /* stat */ 30 #if defined(_MSC_VER) 31 # include <sys/utime.h> /* utime */ 32 # include <io.h> /* _chmod */ 33 #else 34 # include <unistd.h> /* chown, stat */ 35 # include <utime.h> /* utime */ 36 #endif 37 #include <time.h> /* time */ 38 #include <errno.h> 39 #include "mem.h" /* U32, U64 */ 40 41 42 /* ************************************************************ 43 * Avoid fseek()'s 2GiB barrier with MSVC, MacOS, *BSD, MinGW 44 ***************************************************************/ 45 #if defined(_MSC_VER) && (_MSC_VER >= 1400) 46 # define UTIL_fseek _fseeki64 47 #elif !defined(__64BIT__) && (PLATFORM_POSIX_VERSION >= 200112L) /* No point defining Large file for 64 bit */ 48 # define UTIL_fseek fseeko 49 #elif defined(__MINGW32__) && defined(__MSVCRT__) && !defined(__STRICT_ANSI__) && !defined(__NO_MINGW_LFS) 50 # define UTIL_fseek fseeko64 51 #else 52 # define UTIL_fseek fseek 53 #endif 54 55 56 /*-**************************************** 57 * Sleep functions: Windows - Posix - others 58 ******************************************/ 59 #if defined(_WIN32) 60 # include <windows.h> 61 # define SET_REALTIME_PRIORITY SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS) 62 # define UTIL_sleep(s) Sleep(1000*s) 63 # define UTIL_sleepMilli(milli) Sleep(milli) 64 #elif PLATFORM_POSIX_VERSION >= 0 /* Unix-like operating system */ 65 # include <unistd.h> 66 # include <sys/resource.h> /* setpriority */ 67 # include <time.h> /* clock_t, nanosleep, clock, CLOCKS_PER_SEC */ 68 # if defined(PRIO_PROCESS) 69 # define SET_REALTIME_PRIORITY setpriority(PRIO_PROCESS, 0, -20) 70 # else 71 # define SET_REALTIME_PRIORITY /* disabled */ 72 # endif 73 # define UTIL_sleep(s) sleep(s) 74 # if (defined(__linux__) && (PLATFORM_POSIX_VERSION >= 199309L)) || (PLATFORM_POSIX_VERSION >= 200112L) /* nanosleep requires POSIX.1-2001 */ 75 # define UTIL_sleepMilli(milli) { struct timespec t; t.tv_sec=0; t.tv_nsec=milli*1000000ULL; nanosleep(&t, NULL); } 76 # else 77 # define UTIL_sleepMilli(milli) /* disabled */ 78 # endif 79 #else 80 # define SET_REALTIME_PRIORITY /* disabled */ 81 # define UTIL_sleep(s) /* disabled */ 82 # define UTIL_sleepMilli(milli) /* disabled */ 83 #endif 84 85 86 /* ************************************* 87 * Constants 88 ***************************************/ 89 #define LIST_SIZE_INCREASE (8*1024) 90 91 92 /*-**************************************** 93 * Compiler specifics 94 ******************************************/ 95 #if defined(__INTEL_COMPILER) 96 # pragma warning(disable : 177) /* disable: message #177: function was declared but never referenced, useful with UTIL_STATIC */ 97 #endif 98 #if defined(__GNUC__) 99 # define UTIL_STATIC static __attribute__((unused)) 100 #elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) 101 # define UTIL_STATIC static inline 102 #elif defined(_MSC_VER) 103 # define UTIL_STATIC static __inline 104 #else 105 # define UTIL_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */ 106 #endif 107 108 109 /*-**************************************** 110 * Console log 111 ******************************************/ 112 static int g_utilDisplayLevel; 113 #define UTIL_DISPLAY(...) fprintf(stderr, __VA_ARGS__) 114 #define UTIL_DISPLAYLEVEL(l, ...) { if (g_utilDisplayLevel>=l) { UTIL_DISPLAY(__VA_ARGS__); } } 115 116 117 /*-**************************************** 118 * Time functions 119 ******************************************/ 120 #if defined(_WIN32) /* Windows */ 121 typedef LARGE_INTEGER UTIL_time_t; 122 UTIL_STATIC UTIL_time_t UTIL_getTime(void) { UTIL_time_t x; QueryPerformanceCounter(&x); return x; } 123 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) 124 { 125 static LARGE_INTEGER ticksPerSecond; 126 static int init = 0; 127 if (!init) { 128 if (!QueryPerformanceFrequency(&ticksPerSecond)) 129 UTIL_DISPLAYLEVEL(1, "ERROR: QueryPerformanceFrequency() failure\n"); 130 init = 1; 131 } 132 return 1000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart; 133 } 134 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) 135 { 136 static LARGE_INTEGER ticksPerSecond; 137 static int init = 0; 138 if (!init) { 139 if (!QueryPerformanceFrequency(&ticksPerSecond)) 140 UTIL_DISPLAYLEVEL(1, "ERROR: QueryPerformanceFrequency() failure\n"); 141 init = 1; 142 } 143 return 1000000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart; 144 } 145 #elif defined(__APPLE__) && defined(__MACH__) 146 #include <mach/mach_time.h> 147 typedef U64 UTIL_time_t; 148 UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return mach_absolute_time(); } 149 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) 150 { 151 static mach_timebase_info_data_t rate; 152 static int init = 0; 153 if (!init) { 154 mach_timebase_info(&rate); 155 init = 1; 156 } 157 return (((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom))/1000ULL; 158 } 159 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) 160 { 161 static mach_timebase_info_data_t rate; 162 static int init = 0; 163 if (!init) { 164 mach_timebase_info(&rate); 165 init = 1; 166 } 167 return ((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom); 168 } 169 #elif (PLATFORM_POSIX_VERSION >= 200112L) 170 #include <time.h> 171 typedef struct timespec UTIL_freq_t; 172 typedef struct timespec UTIL_time_t; 173 UTIL_STATIC UTIL_time_t UTIL_getTime(void) 174 { 175 UTIL_time_t time; 176 if (clock_gettime(CLOCK_MONOTONIC, &time)) 177 UTIL_DISPLAYLEVEL(1, "ERROR: Failed to get time\n"); /* we could also exit() */ 178 return time; 179 } 180 UTIL_STATIC UTIL_time_t UTIL_getSpanTime(UTIL_time_t begin, UTIL_time_t end) 181 { 182 UTIL_time_t diff; 183 if (end.tv_nsec < begin.tv_nsec) { 184 diff.tv_sec = (end.tv_sec - 1) - begin.tv_sec; 185 diff.tv_nsec = (end.tv_nsec + 1000000000ULL) - begin.tv_nsec; 186 } else { 187 diff.tv_sec = end.tv_sec - begin.tv_sec; 188 diff.tv_nsec = end.tv_nsec - begin.tv_nsec; 189 } 190 return diff; 191 } 192 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t begin, UTIL_time_t end) 193 { 194 UTIL_time_t const diff = UTIL_getSpanTime(begin, end); 195 U64 micro = 0; 196 micro += 1000000ULL * diff.tv_sec; 197 micro += diff.tv_nsec / 1000ULL; 198 return micro; 199 } 200 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t begin, UTIL_time_t end) 201 { 202 UTIL_time_t const diff = UTIL_getSpanTime(begin, end); 203 U64 nano = 0; 204 nano += 1000000000ULL * diff.tv_sec; 205 nano += diff.tv_nsec; 206 return nano; 207 } 208 #else /* relies on standard C (note : clock_t measurements can be wrong when using multi-threading) */ 209 typedef clock_t UTIL_time_t; 210 UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return clock(); } 211 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } 212 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } 213 #endif 214 215 216 /* returns time span in microseconds */ 217 UTIL_STATIC U64 UTIL_clockSpanMicro( UTIL_time_t clockStart ) 218 { 219 UTIL_time_t const clockEnd = UTIL_getTime(); 220 return UTIL_getSpanTimeMicro(clockStart, clockEnd); 221 } 222 223 224 UTIL_STATIC void UTIL_waitForNextTick(void) 225 { 226 UTIL_time_t const clockStart = UTIL_getTime(); 227 UTIL_time_t clockEnd; 228 do { 229 clockEnd = UTIL_getTime(); 230 } while (UTIL_getSpanTimeNano(clockStart, clockEnd) == 0); 231 } 232 233 234 235 /*-**************************************** 236 * File functions 237 ******************************************/ 238 #if defined(_MSC_VER) 239 #define chmod _chmod 240 typedef struct __stat64 stat_t; 241 #else 242 typedef struct stat stat_t; 243 #endif 244 245 246 UTIL_STATIC int UTIL_setFileStat(const char *filename, stat_t *statbuf) 247 { 248 int res = 0; 249 struct utimbuf timebuf; 250 251 timebuf.actime = time(NULL); 252 timebuf.modtime = statbuf->st_mtime; 253 res += utime(filename, &timebuf); /* set access and modification times */ 254 255 #if !defined(_WIN32) 256 res += chown(filename, statbuf->st_uid, statbuf->st_gid); /* Copy ownership */ 257 #endif 258 259 res += chmod(filename, statbuf->st_mode & 07777); /* Copy file permissions */ 260 261 errno = 0; 262 return -res; /* number of errors is returned */ 263 } 264 265 266 UTIL_STATIC int UTIL_getFileStat(const char* infilename, stat_t *statbuf) 267 { 268 int r; 269 #if defined(_MSC_VER) 270 r = _stat64(infilename, statbuf); 271 if (r || !(statbuf->st_mode & S_IFREG)) return 0; /* No good... */ 272 #else 273 r = stat(infilename, statbuf); 274 if (r || !S_ISREG(statbuf->st_mode)) return 0; /* No good... */ 275 #endif 276 return 1; 277 } 278 279 280 UTIL_STATIC int UTIL_isRegularFile(const char* infilename) 281 { 282 stat_t statbuf; 283 return UTIL_getFileStat(infilename, &statbuf); /* Only need to know whether it is a regular file */ 284 } 285 286 287 UTIL_STATIC U32 UTIL_isDirectory(const char* infilename) 288 { 289 int r; 290 stat_t statbuf; 291 #if defined(_MSC_VER) 292 r = _stat64(infilename, &statbuf); 293 if (!r && (statbuf.st_mode & _S_IFDIR)) return 1; 294 #else 295 r = stat(infilename, &statbuf); 296 if (!r && S_ISDIR(statbuf.st_mode)) return 1; 297 #endif 298 return 0; 299 } 300 301 UTIL_STATIC U32 UTIL_isLink(const char* infilename) 302 { 303 #if defined(_WIN32) 304 /* no symlinks on windows */ 305 (void)infilename; 306 #else 307 int r; 308 stat_t statbuf; 309 r = lstat(infilename, &statbuf); 310 if (!r && S_ISLNK(statbuf.st_mode)) return 1; 311 #endif 312 return 0; 313 } 314 315 316 UTIL_STATIC U64 UTIL_getFileSize(const char* infilename) 317 { 318 int r; 319 #if defined(_MSC_VER) 320 struct __stat64 statbuf; 321 r = _stat64(infilename, &statbuf); 322 if (r || !(statbuf.st_mode & S_IFREG)) return 0; /* No good... */ 323 #elif defined(__MINGW32__) && defined (__MSVCRT__) 324 struct _stati64 statbuf; 325 r = _stati64(infilename, &statbuf); 326 if (r || !(statbuf.st_mode & S_IFREG)) return 0; /* No good... */ 327 #else 328 struct stat statbuf; 329 r = stat(infilename, &statbuf); 330 if (r || !S_ISREG(statbuf.st_mode)) return 0; /* No good... */ 331 #endif 332 return (U64)statbuf.st_size; 333 } 334 335 336 UTIL_STATIC U64 UTIL_getTotalFileSize(const char** fileNamesTable, unsigned nbFiles) 337 { 338 U64 total = 0; 339 unsigned n; 340 for (n=0; n<nbFiles; n++) 341 total += UTIL_getFileSize(fileNamesTable[n]); 342 return total; 343 } 344 345 346 /* 347 * A modified version of realloc(). 348 * If UTIL_realloc() fails the original block is freed. 349 */ 350 UTIL_STATIC void *UTIL_realloc(void *ptr, size_t size) 351 { 352 void *newptr = realloc(ptr, size); 353 if (newptr) return newptr; 354 free(ptr); 355 return NULL; 356 } 357 358 #ifdef _WIN32 359 # define UTIL_HAS_CREATEFILELIST 360 361 UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks) 362 { 363 char* path; 364 int dirLength, fnameLength, pathLength, nbFiles = 0; 365 WIN32_FIND_DATAA cFile; 366 HANDLE hFile; 367 368 dirLength = (int)strlen(dirName); 369 path = (char*) malloc(dirLength + 3); 370 if (!path) return 0; 371 372 memcpy(path, dirName, dirLength); 373 path[dirLength] = '\\'; 374 path[dirLength+1] = '*'; 375 path[dirLength+2] = 0; 376 377 hFile=FindFirstFileA(path, &cFile); 378 if (hFile == INVALID_HANDLE_VALUE) { 379 UTIL_DISPLAYLEVEL(1, "Cannot open directory '%s'\n", dirName); 380 return 0; 381 } 382 free(path); 383 384 do { 385 fnameLength = (int)strlen(cFile.cFileName); 386 path = (char*) malloc(dirLength + fnameLength + 2); 387 if (!path) { FindClose(hFile); return 0; } 388 memcpy(path, dirName, dirLength); 389 path[dirLength] = '\\'; 390 memcpy(path+dirLength+1, cFile.cFileName, fnameLength); 391 pathLength = dirLength+1+fnameLength; 392 path[pathLength] = 0; 393 if (cFile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) { 394 if (strcmp (cFile.cFileName, "..") == 0 || 395 strcmp (cFile.cFileName, ".") == 0) continue; 396 397 nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd, followLinks); /* Recursively call "UTIL_prepareFileList" with the new path. */ 398 if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; } 399 } 400 else if ((cFile.dwFileAttributes & FILE_ATTRIBUTE_NORMAL) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_ARCHIVE) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_COMPRESSED)) { 401 if (*bufStart + *pos + pathLength >= *bufEnd) { 402 ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE; 403 *bufStart = (char*)UTIL_realloc(*bufStart, newListSize); 404 *bufEnd = *bufStart + newListSize; 405 if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; } 406 } 407 if (*bufStart + *pos + pathLength < *bufEnd) { 408 strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos)); 409 *pos += pathLength + 1; 410 nbFiles++; 411 } 412 } 413 free(path); 414 } while (FindNextFileA(hFile, &cFile)); 415 416 FindClose(hFile); 417 return nbFiles; 418 } 419 420 #elif defined(__linux__) || (PLATFORM_POSIX_VERSION >= 200112L) /* opendir, readdir require POSIX.1-2001 */ 421 # define UTIL_HAS_CREATEFILELIST 422 # include <dirent.h> /* opendir, readdir */ 423 # include <string.h> /* strerror, memcpy */ 424 425 UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks) 426 { 427 DIR *dir; 428 struct dirent *entry; 429 char* path; 430 int dirLength, fnameLength, pathLength, nbFiles = 0; 431 432 if (!(dir = opendir(dirName))) { 433 UTIL_DISPLAYLEVEL(1, "Cannot open directory '%s': %s\n", dirName, strerror(errno)); 434 return 0; 435 } 436 437 dirLength = (int)strlen(dirName); 438 errno = 0; 439 while ((entry = readdir(dir)) != NULL) { 440 if (strcmp (entry->d_name, "..") == 0 || 441 strcmp (entry->d_name, ".") == 0) continue; 442 fnameLength = (int)strlen(entry->d_name); 443 path = (char*) malloc(dirLength + fnameLength + 2); 444 if (!path) { closedir(dir); return 0; } 445 memcpy(path, dirName, dirLength); 446 447 path[dirLength] = '/'; 448 memcpy(path+dirLength+1, entry->d_name, fnameLength); 449 pathLength = dirLength+1+fnameLength; 450 path[pathLength] = 0; 451 452 if (!followLinks && UTIL_isLink(path)) { 453 UTIL_DISPLAYLEVEL(2, "Warning : %s is a symbolic link, ignoring\n", path); 454 continue; 455 } 456 457 if (UTIL_isDirectory(path)) { 458 nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd, followLinks); /* Recursively call "UTIL_prepareFileList" with the new path. */ 459 if (*bufStart == NULL) { free(path); closedir(dir); return 0; } 460 } else { 461 if (*bufStart + *pos + pathLength >= *bufEnd) { 462 ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE; 463 *bufStart = (char*)UTIL_realloc(*bufStart, newListSize); 464 *bufEnd = *bufStart + newListSize; 465 if (*bufStart == NULL) { free(path); closedir(dir); return 0; } 466 } 467 if (*bufStart + *pos + pathLength < *bufEnd) { 468 strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos)); 469 *pos += pathLength + 1; 470 nbFiles++; 471 } 472 } 473 free(path); 474 errno = 0; /* clear errno after UTIL_isDirectory, UTIL_prepareFileList */ 475 } 476 477 if (errno != 0) { 478 UTIL_DISPLAYLEVEL(1, "readdir(%s) error: %s\n", dirName, strerror(errno)); 479 free(*bufStart); 480 *bufStart = NULL; 481 } 482 closedir(dir); 483 return nbFiles; 484 } 485 486 #else 487 488 UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks) 489 { 490 (void)bufStart; (void)bufEnd; (void)pos; 491 UTIL_DISPLAYLEVEL(1, "Directory %s ignored (compiled without _WIN32 or _POSIX_C_SOURCE)\n", dirName); 492 return 0; 493 } 494 495 #endif /* #ifdef _WIN32 */ 496 497 /* 498 * UTIL_createFileList - takes a list of files and directories (params: inputNames, inputNamesNb), scans directories, 499 * and returns a new list of files (params: return value, allocatedBuffer, allocatedNamesNb). 500 * After finishing usage of the list the structures should be freed with UTIL_freeFileList(params: return value, allocatedBuffer) 501 * In case of error UTIL_createFileList returns NULL and UTIL_freeFileList should not be called. 502 */ 503 UTIL_STATIC const char** UTIL_createFileList(const char **inputNames, unsigned inputNamesNb, char** allocatedBuffer, unsigned* allocatedNamesNb, int followLinks) 504 { 505 size_t pos; 506 unsigned i, nbFiles; 507 char* buf = (char*)malloc(LIST_SIZE_INCREASE); 508 char* bufend = buf + LIST_SIZE_INCREASE; 509 const char** fileTable; 510 511 if (!buf) return NULL; 512 513 for (i=0, pos=0, nbFiles=0; i<inputNamesNb; i++) { 514 if (!UTIL_isDirectory(inputNames[i])) { 515 size_t const len = strlen(inputNames[i]); 516 if (buf + pos + len >= bufend) { 517 ptrdiff_t newListSize = (bufend - buf) + LIST_SIZE_INCREASE; 518 buf = (char*)UTIL_realloc(buf, newListSize); 519 bufend = buf + newListSize; 520 if (!buf) return NULL; 521 } 522 if (buf + pos + len < bufend) { 523 strncpy(buf + pos, inputNames[i], bufend - (buf + pos)); 524 pos += len + 1; 525 nbFiles++; 526 } 527 } else { 528 nbFiles += UTIL_prepareFileList(inputNames[i], &buf, &pos, &bufend, followLinks); 529 if (buf == NULL) return NULL; 530 } } 531 532 if (nbFiles == 0) { free(buf); return NULL; } 533 534 fileTable = (const char**)malloc((nbFiles+1) * sizeof(const char*)); 535 if (!fileTable) { free(buf); return NULL; } 536 537 for (i=0, pos=0; i<nbFiles; i++) { 538 fileTable[i] = buf + pos; 539 pos += strlen(fileTable[i]) + 1; 540 } 541 542 if (buf + pos > bufend) { free(buf); free((void*)fileTable); return NULL; } 543 544 *allocatedBuffer = buf; 545 *allocatedNamesNb = nbFiles; 546 547 return fileTable; 548 } 549 550 551 UTIL_STATIC void UTIL_freeFileList(const char** filenameTable, char* allocatedBuffer) 552 { 553 if (allocatedBuffer) free(allocatedBuffer); 554 if (filenameTable) free((void*)filenameTable); 555 } 556 557 /* count the number of physical cores */ 558 #if defined(_WIN32) || defined(WIN32) 559 560 #include <windows.h> 561 562 typedef BOOL(WINAPI* LPFN_GLPI)(PSYSTEM_LOGICAL_PROCESSOR_INFORMATION, PDWORD); 563 564 UTIL_STATIC int UTIL_countPhysicalCores(void) 565 { 566 static int numPhysicalCores = 0; 567 if (numPhysicalCores != 0) return numPhysicalCores; 568 569 { LPFN_GLPI glpi; 570 BOOL done = FALSE; 571 PSYSTEM_LOGICAL_PROCESSOR_INFORMATION buffer = NULL; 572 PSYSTEM_LOGICAL_PROCESSOR_INFORMATION ptr = NULL; 573 DWORD returnLength = 0; 574 size_t byteOffset = 0; 575 576 glpi = (LPFN_GLPI)GetProcAddress(GetModuleHandle(TEXT("kernel32")), 577 "GetLogicalProcessorInformation"); 578 579 if (glpi == NULL) { 580 goto failed; 581 } 582 583 while(!done) { 584 DWORD rc = glpi(buffer, &returnLength); 585 if (FALSE == rc) { 586 if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) { 587 if (buffer) 588 free(buffer); 589 buffer = (PSYSTEM_LOGICAL_PROCESSOR_INFORMATION)malloc(returnLength); 590 591 if (buffer == NULL) { 592 perror("zstd"); 593 exit(1); 594 } 595 } else { 596 /* some other error */ 597 goto failed; 598 } 599 } else { 600 done = TRUE; 601 } 602 } 603 604 ptr = buffer; 605 606 while (byteOffset + sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION) <= returnLength) { 607 608 if (ptr->Relationship == RelationProcessorCore) { 609 numPhysicalCores++; 610 } 611 612 ptr++; 613 byteOffset += sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION); 614 } 615 616 free(buffer); 617 618 return numPhysicalCores; 619 } 620 621 failed: 622 /* try to fall back on GetSystemInfo */ 623 { SYSTEM_INFO sysinfo; 624 GetSystemInfo(&sysinfo); 625 numPhysicalCores = sysinfo.dwNumberOfProcessors; 626 if (numPhysicalCores == 0) numPhysicalCores = 1; /* just in case */ 627 } 628 return numPhysicalCores; 629 } 630 631 #elif defined(__APPLE__) 632 633 #include <sys/sysctl.h> 634 635 /* Use apple-provided syscall 636 * see: man 3 sysctl */ 637 UTIL_STATIC int UTIL_countPhysicalCores(void) 638 { 639 static S32 numPhysicalCores = 0; /* apple specifies int32_t */ 640 if (numPhysicalCores != 0) return numPhysicalCores; 641 642 { size_t size = sizeof(S32); 643 int const ret = sysctlbyname("hw.physicalcpu", &numPhysicalCores, &size, NULL, 0); 644 if (ret != 0) { 645 if (errno == ENOENT) { 646 /* entry not present, fall back on 1 */ 647 numPhysicalCores = 1; 648 } else { 649 perror("zstd: can't get number of physical cpus"); 650 exit(1); 651 } 652 } 653 654 return numPhysicalCores; 655 } 656 } 657 658 #elif defined(__linux__) 659 660 /* parse /proc/cpuinfo 661 * siblings / cpu cores should give hyperthreading ratio 662 * otherwise fall back on sysconf */ 663 UTIL_STATIC int UTIL_countPhysicalCores(void) 664 { 665 static int numPhysicalCores = 0; 666 667 if (numPhysicalCores != 0) return numPhysicalCores; 668 669 numPhysicalCores = (int)sysconf(_SC_NPROCESSORS_ONLN); 670 if (numPhysicalCores == -1) { 671 /* value not queryable, fall back on 1 */ 672 return numPhysicalCores = 1; 673 } 674 675 /* try to determine if there's hyperthreading */ 676 { FILE* const cpuinfo = fopen("/proc/cpuinfo", "r"); 677 #define BUF_SIZE 80 678 char buff[BUF_SIZE]; 679 680 int siblings = 0; 681 int cpu_cores = 0; 682 int ratio = 1; 683 684 if (cpuinfo == NULL) { 685 /* fall back on the sysconf value */ 686 return numPhysicalCores; 687 } 688 689 /* assume the cpu cores/siblings values will be constant across all 690 * present processors */ 691 while (!feof(cpuinfo)) { 692 if (fgets(buff, BUF_SIZE, cpuinfo) != NULL) { 693 if (strncmp(buff, "siblings", 8) == 0) { 694 const char* const sep = strchr(buff, ':'); 695 if (*sep == '\0') { 696 /* formatting was broken? */ 697 goto failed; 698 } 699 700 siblings = atoi(sep + 1); 701 } 702 if (strncmp(buff, "cpu cores", 9) == 0) { 703 const char* const sep = strchr(buff, ':'); 704 if (*sep == '\0') { 705 /* formatting was broken? */ 706 goto failed; 707 } 708 709 cpu_cores = atoi(sep + 1); 710 } 711 } else if (ferror(cpuinfo)) { 712 /* fall back on the sysconf value */ 713 goto failed; 714 } 715 } 716 if (siblings && cpu_cores) { 717 ratio = siblings / cpu_cores; 718 } 719 failed: 720 fclose(cpuinfo); 721 return numPhysicalCores = numPhysicalCores / ratio; 722 } 723 } 724 725 #elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) 726 727 /* Use apple-provided syscall 728 * see: man 3 sysctl */ 729 UTIL_STATIC int UTIL_countPhysicalCores(void) 730 { 731 static int numPhysicalCores = 0; 732 733 if (numPhysicalCores != 0) return numPhysicalCores; 734 735 numPhysicalCores = (int)sysconf(_SC_NPROCESSORS_ONLN); 736 if (numPhysicalCores == -1) { 737 /* value not queryable, fall back on 1 */ 738 return numPhysicalCores = 1; 739 } 740 return numPhysicalCores; 741 } 742 743 #else 744 745 UTIL_STATIC int UTIL_countPhysicalCores(void) 746 { 747 /* assume 1 */ 748 return 1; 749 } 750 751 #endif 752 753 #if defined (__cplusplus) 754 } 755 #endif 756 757 #endif /* UTIL_H_MODULE */ 758