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> /* clock_t, clock, CLOCKS_PER_SEC, nanosleep */ 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 # if defined(PRIO_PROCESS) 68 # define SET_REALTIME_PRIORITY setpriority(PRIO_PROCESS, 0, -20) 69 # else 70 # define SET_REALTIME_PRIORITY /* disabled */ 71 # endif 72 # define UTIL_sleep(s) sleep(s) 73 # if (defined(__linux__) && (PLATFORM_POSIX_VERSION >= 199309L)) || (PLATFORM_POSIX_VERSION >= 200112L) /* nanosleep requires POSIX.1-2001 */ 74 # define UTIL_sleepMilli(milli) { struct timespec t; t.tv_sec=0; t.tv_nsec=milli*1000000ULL; nanosleep(&t, NULL); } 75 # else 76 # define UTIL_sleepMilli(milli) /* disabled */ 77 # endif 78 #else 79 # define SET_REALTIME_PRIORITY /* disabled */ 80 # define UTIL_sleep(s) /* disabled */ 81 # define UTIL_sleepMilli(milli) /* disabled */ 82 #endif 83 84 85 /* ************************************* 86 * Constants 87 ***************************************/ 88 #define LIST_SIZE_INCREASE (8*1024) 89 90 91 /*-**************************************** 92 * Compiler specifics 93 ******************************************/ 94 #if defined(__INTEL_COMPILER) 95 # pragma warning(disable : 177) /* disable: message #177: function was declared but never referenced, useful with UTIL_STATIC */ 96 #endif 97 #if defined(__GNUC__) 98 # define UTIL_STATIC static __attribute__((unused)) 99 #elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) 100 # define UTIL_STATIC static inline 101 #elif defined(_MSC_VER) 102 # define UTIL_STATIC static __inline 103 #else 104 # define UTIL_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */ 105 #endif 106 107 108 /*-**************************************** 109 * Console log 110 ******************************************/ 111 static int g_utilDisplayLevel; 112 #define UTIL_DISPLAY(...) fprintf(stderr, __VA_ARGS__) 113 #define UTIL_DISPLAYLEVEL(l, ...) { if (g_utilDisplayLevel>=l) { UTIL_DISPLAY(__VA_ARGS__); } } 114 115 116 /*-**************************************** 117 * Time functions 118 ******************************************/ 119 #if defined(_WIN32) /* Windows */ 120 #define UTIL_TIME_INITIALIZER { { 0, 0 } } 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 #define UTIL_TIME_INITIALIZER 0 148 typedef U64 UTIL_time_t; 149 UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return mach_absolute_time(); } 150 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) 151 { 152 static mach_timebase_info_data_t rate; 153 static int init = 0; 154 if (!init) { 155 mach_timebase_info(&rate); 156 init = 1; 157 } 158 return (((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom))/1000ULL; 159 } 160 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) 161 { 162 static mach_timebase_info_data_t rate; 163 static int init = 0; 164 if (!init) { 165 mach_timebase_info(&rate); 166 init = 1; 167 } 168 return ((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom); 169 } 170 #elif (PLATFORM_POSIX_VERSION >= 200112L) && (defined __UCLIBC__ || ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 17) || __GLIBC__ > 2)) 171 #define UTIL_TIME_INITIALIZER { 0, 0 } 172 typedef struct timespec UTIL_freq_t; 173 typedef struct timespec UTIL_time_t; 174 UTIL_STATIC UTIL_time_t UTIL_getTime(void) 175 { 176 UTIL_time_t time; 177 if (clock_gettime(CLOCK_MONOTONIC, &time)) 178 UTIL_DISPLAYLEVEL(1, "ERROR: Failed to get time\n"); /* we could also exit() */ 179 return time; 180 } 181 UTIL_STATIC UTIL_time_t UTIL_getSpanTime(UTIL_time_t begin, UTIL_time_t end) 182 { 183 UTIL_time_t diff; 184 if (end.tv_nsec < begin.tv_nsec) { 185 diff.tv_sec = (end.tv_sec - 1) - begin.tv_sec; 186 diff.tv_nsec = (end.tv_nsec + 1000000000ULL) - begin.tv_nsec; 187 } else { 188 diff.tv_sec = end.tv_sec - begin.tv_sec; 189 diff.tv_nsec = end.tv_nsec - begin.tv_nsec; 190 } 191 return diff; 192 } 193 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t begin, UTIL_time_t end) 194 { 195 UTIL_time_t const diff = UTIL_getSpanTime(begin, end); 196 U64 micro = 0; 197 micro += 1000000ULL * diff.tv_sec; 198 micro += diff.tv_nsec / 1000ULL; 199 return micro; 200 } 201 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t begin, UTIL_time_t end) 202 { 203 UTIL_time_t const diff = UTIL_getSpanTime(begin, end); 204 U64 nano = 0; 205 nano += 1000000000ULL * diff.tv_sec; 206 nano += diff.tv_nsec; 207 return nano; 208 } 209 #else /* relies on standard C (note : clock_t measurements can be wrong when using multi-threading) */ 210 typedef clock_t UTIL_time_t; 211 #define UTIL_TIME_INITIALIZER 0 212 UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return clock(); } 213 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } 214 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } 215 #endif 216 217 #define SEC_TO_MICRO 1000000 218 219 /* returns time span in microseconds */ 220 UTIL_STATIC U64 UTIL_clockSpanMicro( UTIL_time_t clockStart ) 221 { 222 UTIL_time_t const clockEnd = UTIL_getTime(); 223 return UTIL_getSpanTimeMicro(clockStart, clockEnd); 224 } 225 226 227 UTIL_STATIC void UTIL_waitForNextTick(void) 228 { 229 UTIL_time_t const clockStart = UTIL_getTime(); 230 UTIL_time_t clockEnd; 231 do { 232 clockEnd = UTIL_getTime(); 233 } while (UTIL_getSpanTimeNano(clockStart, clockEnd) == 0); 234 } 235 236 237 238 /*-**************************************** 239 * File functions 240 ******************************************/ 241 #if defined(_MSC_VER) 242 #define chmod _chmod 243 typedef struct __stat64 stat_t; 244 #else 245 typedef struct stat stat_t; 246 #endif 247 248 249 UTIL_STATIC int UTIL_setFileStat(const char *filename, stat_t *statbuf) 250 { 251 int res = 0; 252 struct utimbuf timebuf; 253 254 timebuf.actime = time(NULL); 255 timebuf.modtime = statbuf->st_mtime; 256 res += utime(filename, &timebuf); /* set access and modification times */ 257 258 #if !defined(_WIN32) 259 res += chown(filename, statbuf->st_uid, statbuf->st_gid); /* Copy ownership */ 260 #endif 261 262 res += chmod(filename, statbuf->st_mode & 07777); /* Copy file permissions */ 263 264 errno = 0; 265 return -res; /* number of errors is returned */ 266 } 267 268 269 UTIL_STATIC int UTIL_getFileStat(const char* infilename, stat_t *statbuf) 270 { 271 int r; 272 #if defined(_MSC_VER) 273 r = _stat64(infilename, statbuf); 274 if (r || !(statbuf->st_mode & S_IFREG)) return 0; /* No good... */ 275 #else 276 r = stat(infilename, statbuf); 277 if (r || !S_ISREG(statbuf->st_mode)) return 0; /* No good... */ 278 #endif 279 return 1; 280 } 281 282 283 UTIL_STATIC int UTIL_isRegularFile(const char* infilename) 284 { 285 stat_t statbuf; 286 return UTIL_getFileStat(infilename, &statbuf); /* Only need to know whether it is a regular file */ 287 } 288 289 290 UTIL_STATIC U32 UTIL_isDirectory(const char* infilename) 291 { 292 int r; 293 stat_t statbuf; 294 #if defined(_MSC_VER) 295 r = _stat64(infilename, &statbuf); 296 if (!r && (statbuf.st_mode & _S_IFDIR)) return 1; 297 #else 298 r = stat(infilename, &statbuf); 299 if (!r && S_ISDIR(statbuf.st_mode)) return 1; 300 #endif 301 return 0; 302 } 303 304 UTIL_STATIC U32 UTIL_isLink(const char* infilename) 305 { 306 #if defined(_WIN32) 307 /* no symlinks on windows */ 308 (void)infilename; 309 #else 310 int r; 311 stat_t statbuf; 312 r = lstat(infilename, &statbuf); 313 if (!r && S_ISLNK(statbuf.st_mode)) return 1; 314 #endif 315 return 0; 316 } 317 318 319 #define UTIL_FILESIZE_UNKNOWN ((U64)(-1)) 320 UTIL_STATIC U64 UTIL_getFileSize(const char* infilename) 321 { 322 if (!UTIL_isRegularFile(infilename)) return UTIL_FILESIZE_UNKNOWN; 323 { int r; 324 #if defined(_MSC_VER) 325 struct __stat64 statbuf; 326 r = _stat64(infilename, &statbuf); 327 if (r || !(statbuf.st_mode & S_IFREG)) return UTIL_FILESIZE_UNKNOWN; 328 #elif defined(__MINGW32__) && defined (__MSVCRT__) 329 struct _stati64 statbuf; 330 r = _stati64(infilename, &statbuf); 331 if (r || !(statbuf.st_mode & S_IFREG)) return UTIL_FILESIZE_UNKNOWN; 332 #else 333 struct stat statbuf; 334 r = stat(infilename, &statbuf); 335 if (r || !S_ISREG(statbuf.st_mode)) return UTIL_FILESIZE_UNKNOWN; 336 #endif 337 return (U64)statbuf.st_size; 338 } 339 } 340 341 342 UTIL_STATIC U64 UTIL_getTotalFileSize(const char* const * const fileNamesTable, unsigned nbFiles) 343 { 344 U64 total = 0; 345 int error = 0; 346 unsigned n; 347 for (n=0; n<nbFiles; n++) { 348 U64 const size = UTIL_getFileSize(fileNamesTable[n]); 349 error |= (size == UTIL_FILESIZE_UNKNOWN); 350 total += size; 351 } 352 return error ? UTIL_FILESIZE_UNKNOWN : total; 353 } 354 355 356 /* 357 * A modified version of realloc(). 358 * If UTIL_realloc() fails the original block is freed. 359 */ 360 UTIL_STATIC void *UTIL_realloc(void *ptr, size_t size) 361 { 362 void *newptr = realloc(ptr, size); 363 if (newptr) return newptr; 364 free(ptr); 365 return NULL; 366 } 367 368 #ifdef _WIN32 369 # define UTIL_HAS_CREATEFILELIST 370 371 UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks) 372 { 373 char* path; 374 int dirLength, fnameLength, pathLength, nbFiles = 0; 375 WIN32_FIND_DATAA cFile; 376 HANDLE hFile; 377 378 dirLength = (int)strlen(dirName); 379 path = (char*) malloc(dirLength + 3); 380 if (!path) return 0; 381 382 memcpy(path, dirName, dirLength); 383 path[dirLength] = '\\'; 384 path[dirLength+1] = '*'; 385 path[dirLength+2] = 0; 386 387 hFile=FindFirstFileA(path, &cFile); 388 if (hFile == INVALID_HANDLE_VALUE) { 389 UTIL_DISPLAYLEVEL(1, "Cannot open directory '%s'\n", dirName); 390 return 0; 391 } 392 free(path); 393 394 do { 395 fnameLength = (int)strlen(cFile.cFileName); 396 path = (char*) malloc(dirLength + fnameLength + 2); 397 if (!path) { FindClose(hFile); return 0; } 398 memcpy(path, dirName, dirLength); 399 path[dirLength] = '\\'; 400 memcpy(path+dirLength+1, cFile.cFileName, fnameLength); 401 pathLength = dirLength+1+fnameLength; 402 path[pathLength] = 0; 403 if (cFile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) { 404 if (strcmp (cFile.cFileName, "..") == 0 || 405 strcmp (cFile.cFileName, ".") == 0) continue; 406 407 nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd, followLinks); /* Recursively call "UTIL_prepareFileList" with the new path. */ 408 if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; } 409 } 410 else if ((cFile.dwFileAttributes & FILE_ATTRIBUTE_NORMAL) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_ARCHIVE) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_COMPRESSED)) { 411 if (*bufStart + *pos + pathLength >= *bufEnd) { 412 ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE; 413 *bufStart = (char*)UTIL_realloc(*bufStart, newListSize); 414 *bufEnd = *bufStart + newListSize; 415 if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; } 416 } 417 if (*bufStart + *pos + pathLength < *bufEnd) { 418 strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos)); 419 *pos += pathLength + 1; 420 nbFiles++; 421 } 422 } 423 free(path); 424 } while (FindNextFileA(hFile, &cFile)); 425 426 FindClose(hFile); 427 return nbFiles; 428 } 429 430 #elif defined(__linux__) || (PLATFORM_POSIX_VERSION >= 200112L) /* opendir, readdir require POSIX.1-2001 */ 431 # define UTIL_HAS_CREATEFILELIST 432 # include <dirent.h> /* opendir, readdir */ 433 # include <string.h> /* strerror, memcpy */ 434 435 UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks) 436 { 437 DIR *dir; 438 struct dirent *entry; 439 char* path; 440 int dirLength, fnameLength, pathLength, nbFiles = 0; 441 442 if (!(dir = opendir(dirName))) { 443 UTIL_DISPLAYLEVEL(1, "Cannot open directory '%s': %s\n", dirName, strerror(errno)); 444 return 0; 445 } 446 447 dirLength = (int)strlen(dirName); 448 errno = 0; 449 while ((entry = readdir(dir)) != NULL) { 450 if (strcmp (entry->d_name, "..") == 0 || 451 strcmp (entry->d_name, ".") == 0) continue; 452 fnameLength = (int)strlen(entry->d_name); 453 path = (char*) malloc(dirLength + fnameLength + 2); 454 if (!path) { closedir(dir); return 0; } 455 memcpy(path, dirName, dirLength); 456 457 path[dirLength] = '/'; 458 memcpy(path+dirLength+1, entry->d_name, fnameLength); 459 pathLength = dirLength+1+fnameLength; 460 path[pathLength] = 0; 461 462 if (!followLinks && UTIL_isLink(path)) { 463 UTIL_DISPLAYLEVEL(2, "Warning : %s is a symbolic link, ignoring\n", path); 464 continue; 465 } 466 467 if (UTIL_isDirectory(path)) { 468 nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd, followLinks); /* Recursively call "UTIL_prepareFileList" with the new path. */ 469 if (*bufStart == NULL) { free(path); closedir(dir); return 0; } 470 } else { 471 if (*bufStart + *pos + pathLength >= *bufEnd) { 472 ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE; 473 *bufStart = (char*)UTIL_realloc(*bufStart, newListSize); 474 *bufEnd = *bufStart + newListSize; 475 if (*bufStart == NULL) { free(path); closedir(dir); return 0; } 476 } 477 if (*bufStart + *pos + pathLength < *bufEnd) { 478 strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos)); 479 *pos += pathLength + 1; 480 nbFiles++; 481 } 482 } 483 free(path); 484 errno = 0; /* clear errno after UTIL_isDirectory, UTIL_prepareFileList */ 485 } 486 487 if (errno != 0) { 488 UTIL_DISPLAYLEVEL(1, "readdir(%s) error: %s\n", dirName, strerror(errno)); 489 free(*bufStart); 490 *bufStart = NULL; 491 } 492 closedir(dir); 493 return nbFiles; 494 } 495 496 #else 497 498 UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks) 499 { 500 (void)bufStart; (void)bufEnd; (void)pos; 501 UTIL_DISPLAYLEVEL(1, "Directory %s ignored (compiled without _WIN32 or _POSIX_C_SOURCE)\n", dirName); 502 return 0; 503 } 504 505 #endif /* #ifdef _WIN32 */ 506 507 /* 508 * UTIL_createFileList - takes a list of files and directories (params: inputNames, inputNamesNb), scans directories, 509 * and returns a new list of files (params: return value, allocatedBuffer, allocatedNamesNb). 510 * After finishing usage of the list the structures should be freed with UTIL_freeFileList(params: return value, allocatedBuffer) 511 * In case of error UTIL_createFileList returns NULL and UTIL_freeFileList should not be called. 512 */ 513 UTIL_STATIC const char** UTIL_createFileList(const char **inputNames, unsigned inputNamesNb, char** allocatedBuffer, unsigned* allocatedNamesNb, int followLinks) 514 { 515 size_t pos; 516 unsigned i, nbFiles; 517 char* buf = (char*)malloc(LIST_SIZE_INCREASE); 518 char* bufend = buf + LIST_SIZE_INCREASE; 519 const char** fileTable; 520 521 if (!buf) return NULL; 522 523 for (i=0, pos=0, nbFiles=0; i<inputNamesNb; i++) { 524 if (!UTIL_isDirectory(inputNames[i])) { 525 size_t const len = strlen(inputNames[i]); 526 if (buf + pos + len >= bufend) { 527 ptrdiff_t newListSize = (bufend - buf) + LIST_SIZE_INCREASE; 528 buf = (char*)UTIL_realloc(buf, newListSize); 529 bufend = buf + newListSize; 530 if (!buf) return NULL; 531 } 532 if (buf + pos + len < bufend) { 533 strncpy(buf + pos, inputNames[i], bufend - (buf + pos)); 534 pos += len + 1; 535 nbFiles++; 536 } 537 } else { 538 nbFiles += UTIL_prepareFileList(inputNames[i], &buf, &pos, &bufend, followLinks); 539 if (buf == NULL) return NULL; 540 } } 541 542 if (nbFiles == 0) { free(buf); return NULL; } 543 544 fileTable = (const char**)malloc((nbFiles+1) * sizeof(const char*)); 545 if (!fileTable) { free(buf); return NULL; } 546 547 for (i=0, pos=0; i<nbFiles; i++) { 548 fileTable[i] = buf + pos; 549 pos += strlen(fileTable[i]) + 1; 550 } 551 552 if (buf + pos > bufend) { free(buf); free((void*)fileTable); return NULL; } 553 554 *allocatedBuffer = buf; 555 *allocatedNamesNb = nbFiles; 556 557 return fileTable; 558 } 559 560 561 UTIL_STATIC void UTIL_freeFileList(const char** filenameTable, char* allocatedBuffer) 562 { 563 if (allocatedBuffer) free(allocatedBuffer); 564 if (filenameTable) free((void*)filenameTable); 565 } 566 567 /* count the number of physical cores */ 568 #if defined(_WIN32) || defined(WIN32) 569 570 #include <windows.h> 571 572 typedef BOOL(WINAPI* LPFN_GLPI)(PSYSTEM_LOGICAL_PROCESSOR_INFORMATION, PDWORD); 573 574 UTIL_STATIC int UTIL_countPhysicalCores(void) 575 { 576 static int numPhysicalCores = 0; 577 if (numPhysicalCores != 0) return numPhysicalCores; 578 579 { LPFN_GLPI glpi; 580 BOOL done = FALSE; 581 PSYSTEM_LOGICAL_PROCESSOR_INFORMATION buffer = NULL; 582 PSYSTEM_LOGICAL_PROCESSOR_INFORMATION ptr = NULL; 583 DWORD returnLength = 0; 584 size_t byteOffset = 0; 585 586 glpi = (LPFN_GLPI)GetProcAddress(GetModuleHandle(TEXT("kernel32")), 587 "GetLogicalProcessorInformation"); 588 589 if (glpi == NULL) { 590 goto failed; 591 } 592 593 while(!done) { 594 DWORD rc = glpi(buffer, &returnLength); 595 if (FALSE == rc) { 596 if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) { 597 if (buffer) 598 free(buffer); 599 buffer = (PSYSTEM_LOGICAL_PROCESSOR_INFORMATION)malloc(returnLength); 600 601 if (buffer == NULL) { 602 perror("zstd"); 603 exit(1); 604 } 605 } else { 606 /* some other error */ 607 goto failed; 608 } 609 } else { 610 done = TRUE; 611 } 612 } 613 614 ptr = buffer; 615 616 while (byteOffset + sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION) <= returnLength) { 617 618 if (ptr->Relationship == RelationProcessorCore) { 619 numPhysicalCores++; 620 } 621 622 ptr++; 623 byteOffset += sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION); 624 } 625 626 free(buffer); 627 628 return numPhysicalCores; 629 } 630 631 failed: 632 /* try to fall back on GetSystemInfo */ 633 { SYSTEM_INFO sysinfo; 634 GetSystemInfo(&sysinfo); 635 numPhysicalCores = sysinfo.dwNumberOfProcessors; 636 if (numPhysicalCores == 0) numPhysicalCores = 1; /* just in case */ 637 } 638 return numPhysicalCores; 639 } 640 641 #elif defined(__APPLE__) 642 643 #include <sys/sysctl.h> 644 645 /* Use apple-provided syscall 646 * see: man 3 sysctl */ 647 UTIL_STATIC int UTIL_countPhysicalCores(void) 648 { 649 static S32 numPhysicalCores = 0; /* apple specifies int32_t */ 650 if (numPhysicalCores != 0) return numPhysicalCores; 651 652 { size_t size = sizeof(S32); 653 int const ret = sysctlbyname("hw.physicalcpu", &numPhysicalCores, &size, NULL, 0); 654 if (ret != 0) { 655 if (errno == ENOENT) { 656 /* entry not present, fall back on 1 */ 657 numPhysicalCores = 1; 658 } else { 659 perror("zstd: can't get number of physical cpus"); 660 exit(1); 661 } 662 } 663 664 return numPhysicalCores; 665 } 666 } 667 668 #elif defined(__linux__) 669 670 /* parse /proc/cpuinfo 671 * siblings / cpu cores should give hyperthreading ratio 672 * otherwise fall back on sysconf */ 673 UTIL_STATIC int UTIL_countPhysicalCores(void) 674 { 675 static int numPhysicalCores = 0; 676 677 if (numPhysicalCores != 0) return numPhysicalCores; 678 679 numPhysicalCores = (int)sysconf(_SC_NPROCESSORS_ONLN); 680 if (numPhysicalCores == -1) { 681 /* value not queryable, fall back on 1 */ 682 return numPhysicalCores = 1; 683 } 684 685 /* try to determine if there's hyperthreading */ 686 { FILE* const cpuinfo = fopen("/proc/cpuinfo", "r"); 687 #define BUF_SIZE 80 688 char buff[BUF_SIZE]; 689 690 int siblings = 0; 691 int cpu_cores = 0; 692 int ratio = 1; 693 694 if (cpuinfo == NULL) { 695 /* fall back on the sysconf value */ 696 return numPhysicalCores; 697 } 698 699 /* assume the cpu cores/siblings values will be constant across all 700 * present processors */ 701 while (!feof(cpuinfo)) { 702 if (fgets(buff, BUF_SIZE, cpuinfo) != NULL) { 703 if (strncmp(buff, "siblings", 8) == 0) { 704 const char* const sep = strchr(buff, ':'); 705 if (*sep == '\0') { 706 /* formatting was broken? */ 707 goto failed; 708 } 709 710 siblings = atoi(sep + 1); 711 } 712 if (strncmp(buff, "cpu cores", 9) == 0) { 713 const char* const sep = strchr(buff, ':'); 714 if (*sep == '\0') { 715 /* formatting was broken? */ 716 goto failed; 717 } 718 719 cpu_cores = atoi(sep + 1); 720 } 721 } else if (ferror(cpuinfo)) { 722 /* fall back on the sysconf value */ 723 goto failed; 724 } 725 } 726 if (siblings && cpu_cores) { 727 ratio = siblings / cpu_cores; 728 } 729 failed: 730 fclose(cpuinfo); 731 return numPhysicalCores = numPhysicalCores / ratio; 732 } 733 } 734 735 #elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) 736 737 /* Use apple-provided syscall 738 * see: man 3 sysctl */ 739 UTIL_STATIC int UTIL_countPhysicalCores(void) 740 { 741 static int numPhysicalCores = 0; 742 743 if (numPhysicalCores != 0) return numPhysicalCores; 744 745 numPhysicalCores = (int)sysconf(_SC_NPROCESSORS_ONLN); 746 if (numPhysicalCores == -1) { 747 /* value not queryable, fall back on 1 */ 748 return numPhysicalCores = 1; 749 } 750 return numPhysicalCores; 751 } 752 753 #else 754 755 UTIL_STATIC int UTIL_countPhysicalCores(void) 756 { 757 /* assume 1 */ 758 return 1; 759 } 760 761 #endif 762 763 #if defined (__cplusplus) 764 } 765 #endif 766 767 #endif /* UTIL_H_MODULE */ 768