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