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 } 145 146 #elif defined(__APPLE__) && defined(__MACH__) 147 148 #include <mach/mach_time.h> 149 #define UTIL_TIME_INITIALIZER 0 150 typedef U64 UTIL_time_t; 151 UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return mach_absolute_time(); } 152 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) 153 { 154 static mach_timebase_info_data_t rate; 155 static int init = 0; 156 if (!init) { 157 mach_timebase_info(&rate); 158 init = 1; 159 } 160 return (((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom))/1000ULL; 161 } 162 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) 163 { 164 static mach_timebase_info_data_t rate; 165 static int init = 0; 166 if (!init) { 167 mach_timebase_info(&rate); 168 init = 1; 169 } 170 return ((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom); 171 } 172 173 #elif (PLATFORM_POSIX_VERSION >= 200112L) && (defined __UCLIBC__ || ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 17) || __GLIBC__ > 2)) 174 175 #define UTIL_TIME_INITIALIZER { 0, 0 } 176 typedef struct timespec UTIL_freq_t; 177 typedef struct timespec UTIL_time_t; 178 UTIL_STATIC UTIL_time_t UTIL_getTime(void) 179 { 180 UTIL_time_t time; 181 if (clock_gettime(CLOCK_MONOTONIC, &time)) 182 UTIL_DISPLAYLEVEL(1, "ERROR: Failed to get time\n"); /* we could also exit() */ 183 return time; 184 } 185 UTIL_STATIC UTIL_time_t UTIL_getSpanTime(UTIL_time_t begin, UTIL_time_t end) 186 { 187 UTIL_time_t diff; 188 if (end.tv_nsec < begin.tv_nsec) { 189 diff.tv_sec = (end.tv_sec - 1) - begin.tv_sec; 190 diff.tv_nsec = (end.tv_nsec + 1000000000ULL) - begin.tv_nsec; 191 } else { 192 diff.tv_sec = end.tv_sec - begin.tv_sec; 193 diff.tv_nsec = end.tv_nsec - begin.tv_nsec; 194 } 195 return diff; 196 } 197 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t begin, UTIL_time_t end) 198 { 199 UTIL_time_t const diff = UTIL_getSpanTime(begin, end); 200 U64 micro = 0; 201 micro += 1000000ULL * diff.tv_sec; 202 micro += diff.tv_nsec / 1000ULL; 203 return micro; 204 } 205 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t begin, UTIL_time_t end) 206 { 207 UTIL_time_t const diff = UTIL_getSpanTime(begin, end); 208 U64 nano = 0; 209 nano += 1000000000ULL * diff.tv_sec; 210 nano += diff.tv_nsec; 211 return nano; 212 } 213 #else /* relies on standard C (note : clock_t measurements can be wrong when using multi-threading) */ 214 typedef clock_t UTIL_time_t; 215 #define UTIL_TIME_INITIALIZER 0 216 UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return clock(); } 217 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } 218 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } 219 #endif 220 221 #define SEC_TO_MICRO 1000000 222 223 /* returns time span in microseconds */ 224 UTIL_STATIC U64 UTIL_clockSpanMicro(UTIL_time_t clockStart ) 225 { 226 UTIL_time_t const clockEnd = UTIL_getTime(); 227 return UTIL_getSpanTimeMicro(clockStart, clockEnd); 228 } 229 230 /* returns time span in microseconds */ 231 UTIL_STATIC U64 UTIL_clockSpanNano(UTIL_time_t clockStart ) 232 { 233 UTIL_time_t const clockEnd = UTIL_getTime(); 234 return UTIL_getSpanTimeNano(clockStart, clockEnd); 235 } 236 237 UTIL_STATIC void UTIL_waitForNextTick(void) 238 { 239 UTIL_time_t const clockStart = UTIL_getTime(); 240 UTIL_time_t clockEnd; 241 do { 242 clockEnd = UTIL_getTime(); 243 } while (UTIL_getSpanTimeNano(clockStart, clockEnd) == 0); 244 } 245 246 247 248 /*-**************************************** 249 * File functions 250 ******************************************/ 251 #if defined(_MSC_VER) 252 #define chmod _chmod 253 typedef struct __stat64 stat_t; 254 #else 255 typedef struct stat stat_t; 256 #endif 257 258 259 UTIL_STATIC int UTIL_isRegularFile(const char* infilename); 260 261 262 UTIL_STATIC int UTIL_setFileStat(const char *filename, stat_t *statbuf) 263 { 264 int res = 0; 265 struct utimbuf timebuf; 266 267 if (!UTIL_isRegularFile(filename)) 268 return -1; 269 270 timebuf.actime = time(NULL); 271 timebuf.modtime = statbuf->st_mtime; 272 res += utime(filename, &timebuf); /* set access and modification times */ 273 274 #if !defined(_WIN32) 275 res += chown(filename, statbuf->st_uid, statbuf->st_gid); /* Copy ownership */ 276 #endif 277 278 res += chmod(filename, statbuf->st_mode & 07777); /* Copy file permissions */ 279 280 errno = 0; 281 return -res; /* number of errors is returned */ 282 } 283 284 285 UTIL_STATIC int UTIL_getFileStat(const char* infilename, stat_t *statbuf) 286 { 287 int r; 288 #if defined(_MSC_VER) 289 r = _stat64(infilename, statbuf); 290 if (r || !(statbuf->st_mode & S_IFREG)) return 0; /* No good... */ 291 #else 292 r = stat(infilename, statbuf); 293 if (r || !S_ISREG(statbuf->st_mode)) return 0; /* No good... */ 294 #endif 295 return 1; 296 } 297 298 299 UTIL_STATIC int UTIL_isRegularFile(const char* infilename) 300 { 301 stat_t statbuf; 302 return UTIL_getFileStat(infilename, &statbuf); /* Only need to know whether it is a regular file */ 303 } 304 305 306 UTIL_STATIC U32 UTIL_isDirectory(const char* infilename) 307 { 308 int r; 309 stat_t statbuf; 310 #if defined(_MSC_VER) 311 r = _stat64(infilename, &statbuf); 312 if (!r && (statbuf.st_mode & _S_IFDIR)) return 1; 313 #else 314 r = stat(infilename, &statbuf); 315 if (!r && S_ISDIR(statbuf.st_mode)) return 1; 316 #endif 317 return 0; 318 } 319 320 UTIL_STATIC U32 UTIL_isLink(const char* infilename) 321 { 322 #if defined(_WIN32) 323 /* no symlinks on windows */ 324 (void)infilename; 325 #else 326 int r; 327 stat_t statbuf; 328 r = lstat(infilename, &statbuf); 329 if (!r && S_ISLNK(statbuf.st_mode)) return 1; 330 #endif 331 return 0; 332 } 333 334 335 #define UTIL_FILESIZE_UNKNOWN ((U64)(-1)) 336 UTIL_STATIC U64 UTIL_getFileSize(const char* infilename) 337 { 338 if (!UTIL_isRegularFile(infilename)) return UTIL_FILESIZE_UNKNOWN; 339 { int r; 340 #if defined(_MSC_VER) 341 struct __stat64 statbuf; 342 r = _stat64(infilename, &statbuf); 343 if (r || !(statbuf.st_mode & S_IFREG)) return UTIL_FILESIZE_UNKNOWN; 344 #elif defined(__MINGW32__) && defined (__MSVCRT__) 345 struct _stati64 statbuf; 346 r = _stati64(infilename, &statbuf); 347 if (r || !(statbuf.st_mode & S_IFREG)) return UTIL_FILESIZE_UNKNOWN; 348 #else 349 struct stat statbuf; 350 r = stat(infilename, &statbuf); 351 if (r || !S_ISREG(statbuf.st_mode)) return UTIL_FILESIZE_UNKNOWN; 352 #endif 353 return (U64)statbuf.st_size; 354 } 355 } 356 357 358 UTIL_STATIC U64 UTIL_getTotalFileSize(const char* const * const fileNamesTable, unsigned nbFiles) 359 { 360 U64 total = 0; 361 int error = 0; 362 unsigned n; 363 for (n=0; n<nbFiles; n++) { 364 U64 const size = UTIL_getFileSize(fileNamesTable[n]); 365 error |= (size == UTIL_FILESIZE_UNKNOWN); 366 total += size; 367 } 368 return error ? UTIL_FILESIZE_UNKNOWN : total; 369 } 370 371 372 /* 373 * A modified version of realloc(). 374 * If UTIL_realloc() fails the original block is freed. 375 */ 376 UTIL_STATIC void *UTIL_realloc(void *ptr, size_t size) 377 { 378 void *newptr = realloc(ptr, size); 379 if (newptr) return newptr; 380 free(ptr); 381 return NULL; 382 } 383 384 #ifdef _WIN32 385 # define UTIL_HAS_CREATEFILELIST 386 387 UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks) 388 { 389 char* path; 390 int dirLength, fnameLength, pathLength, nbFiles = 0; 391 WIN32_FIND_DATAA cFile; 392 HANDLE hFile; 393 394 dirLength = (int)strlen(dirName); 395 path = (char*) malloc(dirLength + 3); 396 if (!path) return 0; 397 398 memcpy(path, dirName, dirLength); 399 path[dirLength] = '\\'; 400 path[dirLength+1] = '*'; 401 path[dirLength+2] = 0; 402 403 hFile=FindFirstFileA(path, &cFile); 404 if (hFile == INVALID_HANDLE_VALUE) { 405 UTIL_DISPLAYLEVEL(1, "Cannot open directory '%s'\n", dirName); 406 return 0; 407 } 408 free(path); 409 410 do { 411 fnameLength = (int)strlen(cFile.cFileName); 412 path = (char*) malloc(dirLength + fnameLength + 2); 413 if (!path) { FindClose(hFile); return 0; } 414 memcpy(path, dirName, dirLength); 415 path[dirLength] = '\\'; 416 memcpy(path+dirLength+1, cFile.cFileName, fnameLength); 417 pathLength = dirLength+1+fnameLength; 418 path[pathLength] = 0; 419 if (cFile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) { 420 if (strcmp (cFile.cFileName, "..") == 0 || 421 strcmp (cFile.cFileName, ".") == 0) continue; 422 423 nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd, followLinks); /* Recursively call "UTIL_prepareFileList" with the new path. */ 424 if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; } 425 } 426 else if ((cFile.dwFileAttributes & FILE_ATTRIBUTE_NORMAL) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_ARCHIVE) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_COMPRESSED)) { 427 if (*bufStart + *pos + pathLength >= *bufEnd) { 428 ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE; 429 *bufStart = (char*)UTIL_realloc(*bufStart, newListSize); 430 *bufEnd = *bufStart + newListSize; 431 if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; } 432 } 433 if (*bufStart + *pos + pathLength < *bufEnd) { 434 strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos)); 435 *pos += pathLength + 1; 436 nbFiles++; 437 } 438 } 439 free(path); 440 } while (FindNextFileA(hFile, &cFile)); 441 442 FindClose(hFile); 443 return nbFiles; 444 } 445 446 #elif defined(__linux__) || (PLATFORM_POSIX_VERSION >= 200112L) /* opendir, readdir require POSIX.1-2001 */ 447 # define UTIL_HAS_CREATEFILELIST 448 # include <dirent.h> /* opendir, readdir */ 449 # include <string.h> /* strerror, memcpy */ 450 451 UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks) 452 { 453 DIR *dir; 454 struct dirent *entry; 455 char* path; 456 int dirLength, fnameLength, pathLength, nbFiles = 0; 457 458 if (!(dir = opendir(dirName))) { 459 UTIL_DISPLAYLEVEL(1, "Cannot open directory '%s': %s\n", dirName, strerror(errno)); 460 return 0; 461 } 462 463 dirLength = (int)strlen(dirName); 464 errno = 0; 465 while ((entry = readdir(dir)) != NULL) { 466 if (strcmp (entry->d_name, "..") == 0 || 467 strcmp (entry->d_name, ".") == 0) continue; 468 fnameLength = (int)strlen(entry->d_name); 469 path = (char*) malloc(dirLength + fnameLength + 2); 470 if (!path) { closedir(dir); return 0; } 471 memcpy(path, dirName, dirLength); 472 473 path[dirLength] = '/'; 474 memcpy(path+dirLength+1, entry->d_name, fnameLength); 475 pathLength = dirLength+1+fnameLength; 476 path[pathLength] = 0; 477 478 if (!followLinks && UTIL_isLink(path)) { 479 UTIL_DISPLAYLEVEL(2, "Warning : %s is a symbolic link, ignoring\n", path); 480 continue; 481 } 482 483 if (UTIL_isDirectory(path)) { 484 nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd, followLinks); /* Recursively call "UTIL_prepareFileList" with the new path. */ 485 if (*bufStart == NULL) { free(path); closedir(dir); return 0; } 486 } else { 487 if (*bufStart + *pos + pathLength >= *bufEnd) { 488 ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE; 489 *bufStart = (char*)UTIL_realloc(*bufStart, newListSize); 490 *bufEnd = *bufStart + newListSize; 491 if (*bufStart == NULL) { free(path); closedir(dir); return 0; } 492 } 493 if (*bufStart + *pos + pathLength < *bufEnd) { 494 strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos)); 495 *pos += pathLength + 1; 496 nbFiles++; 497 } 498 } 499 free(path); 500 errno = 0; /* clear errno after UTIL_isDirectory, UTIL_prepareFileList */ 501 } 502 503 if (errno != 0) { 504 UTIL_DISPLAYLEVEL(1, "readdir(%s) error: %s\n", dirName, strerror(errno)); 505 free(*bufStart); 506 *bufStart = NULL; 507 } 508 closedir(dir); 509 return nbFiles; 510 } 511 512 #else 513 514 UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks) 515 { 516 (void)bufStart; (void)bufEnd; (void)pos; 517 UTIL_DISPLAYLEVEL(1, "Directory %s ignored (compiled without _WIN32 or _POSIX_C_SOURCE)\n", dirName); 518 return 0; 519 } 520 521 #endif /* #ifdef _WIN32 */ 522 523 /* 524 * UTIL_createFileList - takes a list of files and directories (params: inputNames, inputNamesNb), scans directories, 525 * and returns a new list of files (params: return value, allocatedBuffer, allocatedNamesNb). 526 * After finishing usage of the list the structures should be freed with UTIL_freeFileList(params: return value, allocatedBuffer) 527 * In case of error UTIL_createFileList returns NULL and UTIL_freeFileList should not be called. 528 */ 529 UTIL_STATIC const char** UTIL_createFileList(const char **inputNames, unsigned inputNamesNb, char** allocatedBuffer, unsigned* allocatedNamesNb, int followLinks) 530 { 531 size_t pos; 532 unsigned i, nbFiles; 533 char* buf = (char*)malloc(LIST_SIZE_INCREASE); 534 char* bufend = buf + LIST_SIZE_INCREASE; 535 const char** fileTable; 536 537 if (!buf) return NULL; 538 539 for (i=0, pos=0, nbFiles=0; i<inputNamesNb; i++) { 540 if (!UTIL_isDirectory(inputNames[i])) { 541 size_t const len = strlen(inputNames[i]); 542 if (buf + pos + len >= bufend) { 543 ptrdiff_t newListSize = (bufend - buf) + LIST_SIZE_INCREASE; 544 buf = (char*)UTIL_realloc(buf, newListSize); 545 bufend = buf + newListSize; 546 if (!buf) return NULL; 547 } 548 if (buf + pos + len < bufend) { 549 strncpy(buf + pos, inputNames[i], bufend - (buf + pos)); 550 pos += len + 1; 551 nbFiles++; 552 } 553 } else { 554 nbFiles += UTIL_prepareFileList(inputNames[i], &buf, &pos, &bufend, followLinks); 555 if (buf == NULL) return NULL; 556 } } 557 558 if (nbFiles == 0) { free(buf); return NULL; } 559 560 fileTable = (const char**)malloc((nbFiles+1) * sizeof(const char*)); 561 if (!fileTable) { free(buf); return NULL; } 562 563 for (i=0, pos=0; i<nbFiles; i++) { 564 fileTable[i] = buf + pos; 565 pos += strlen(fileTable[i]) + 1; 566 } 567 568 if (buf + pos > bufend) { free(buf); free((void*)fileTable); return NULL; } 569 570 *allocatedBuffer = buf; 571 *allocatedNamesNb = nbFiles; 572 573 return fileTable; 574 } 575 576 577 UTIL_STATIC void UTIL_freeFileList(const char** filenameTable, char* allocatedBuffer) 578 { 579 if (allocatedBuffer) free(allocatedBuffer); 580 if (filenameTable) free((void*)filenameTable); 581 } 582 583 /* count the number of physical cores */ 584 #if defined(_WIN32) || defined(WIN32) 585 586 #include <windows.h> 587 588 typedef BOOL(WINAPI* LPFN_GLPI)(PSYSTEM_LOGICAL_PROCESSOR_INFORMATION, PDWORD); 589 590 UTIL_STATIC int UTIL_countPhysicalCores(void) 591 { 592 static int numPhysicalCores = 0; 593 if (numPhysicalCores != 0) return numPhysicalCores; 594 595 { LPFN_GLPI glpi; 596 BOOL done = FALSE; 597 PSYSTEM_LOGICAL_PROCESSOR_INFORMATION buffer = NULL; 598 PSYSTEM_LOGICAL_PROCESSOR_INFORMATION ptr = NULL; 599 DWORD returnLength = 0; 600 size_t byteOffset = 0; 601 602 glpi = (LPFN_GLPI)GetProcAddress(GetModuleHandle(TEXT("kernel32")), 603 "GetLogicalProcessorInformation"); 604 605 if (glpi == NULL) { 606 goto failed; 607 } 608 609 while(!done) { 610 DWORD rc = glpi(buffer, &returnLength); 611 if (FALSE == rc) { 612 if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) { 613 if (buffer) 614 free(buffer); 615 buffer = (PSYSTEM_LOGICAL_PROCESSOR_INFORMATION)malloc(returnLength); 616 617 if (buffer == NULL) { 618 perror("zstd"); 619 exit(1); 620 } 621 } else { 622 /* some other error */ 623 goto failed; 624 } 625 } else { 626 done = TRUE; 627 } 628 } 629 630 ptr = buffer; 631 632 while (byteOffset + sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION) <= returnLength) { 633 634 if (ptr->Relationship == RelationProcessorCore) { 635 numPhysicalCores++; 636 } 637 638 ptr++; 639 byteOffset += sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION); 640 } 641 642 free(buffer); 643 644 return numPhysicalCores; 645 } 646 647 failed: 648 /* try to fall back on GetSystemInfo */ 649 { SYSTEM_INFO sysinfo; 650 GetSystemInfo(&sysinfo); 651 numPhysicalCores = sysinfo.dwNumberOfProcessors; 652 if (numPhysicalCores == 0) numPhysicalCores = 1; /* just in case */ 653 } 654 return numPhysicalCores; 655 } 656 657 #elif defined(__APPLE__) 658 659 #include <sys/sysctl.h> 660 661 /* Use apple-provided syscall 662 * see: man 3 sysctl */ 663 UTIL_STATIC int UTIL_countPhysicalCores(void) 664 { 665 static S32 numPhysicalCores = 0; /* apple specifies int32_t */ 666 if (numPhysicalCores != 0) return numPhysicalCores; 667 668 { size_t size = sizeof(S32); 669 int const ret = sysctlbyname("hw.physicalcpu", &numPhysicalCores, &size, NULL, 0); 670 if (ret != 0) { 671 if (errno == ENOENT) { 672 /* entry not present, fall back on 1 */ 673 numPhysicalCores = 1; 674 } else { 675 perror("zstd: can't get number of physical cpus"); 676 exit(1); 677 } 678 } 679 680 return numPhysicalCores; 681 } 682 } 683 684 #elif defined(__linux__) 685 686 /* parse /proc/cpuinfo 687 * siblings / cpu cores should give hyperthreading ratio 688 * otherwise fall back on sysconf */ 689 UTIL_STATIC int UTIL_countPhysicalCores(void) 690 { 691 static int numPhysicalCores = 0; 692 693 if (numPhysicalCores != 0) return numPhysicalCores; 694 695 numPhysicalCores = (int)sysconf(_SC_NPROCESSORS_ONLN); 696 if (numPhysicalCores == -1) { 697 /* value not queryable, fall back on 1 */ 698 return numPhysicalCores = 1; 699 } 700 701 /* try to determine if there's hyperthreading */ 702 { FILE* const cpuinfo = fopen("/proc/cpuinfo", "r"); 703 #define BUF_SIZE 80 704 char buff[BUF_SIZE]; 705 706 int siblings = 0; 707 int cpu_cores = 0; 708 int ratio = 1; 709 710 if (cpuinfo == NULL) { 711 /* fall back on the sysconf value */ 712 return numPhysicalCores; 713 } 714 715 /* assume the cpu cores/siblings values will be constant across all 716 * present processors */ 717 while (!feof(cpuinfo)) { 718 if (fgets(buff, BUF_SIZE, cpuinfo) != NULL) { 719 if (strncmp(buff, "siblings", 8) == 0) { 720 const char* const sep = strchr(buff, ':'); 721 if (*sep == '\0') { 722 /* formatting was broken? */ 723 goto failed; 724 } 725 726 siblings = atoi(sep + 1); 727 } 728 if (strncmp(buff, "cpu cores", 9) == 0) { 729 const char* const sep = strchr(buff, ':'); 730 if (*sep == '\0') { 731 /* formatting was broken? */ 732 goto failed; 733 } 734 735 cpu_cores = atoi(sep + 1); 736 } 737 } else if (ferror(cpuinfo)) { 738 /* fall back on the sysconf value */ 739 goto failed; 740 } 741 } 742 if (siblings && cpu_cores) { 743 ratio = siblings / cpu_cores; 744 } 745 failed: 746 fclose(cpuinfo); 747 return numPhysicalCores = numPhysicalCores / ratio; 748 } 749 } 750 751 #elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) 752 753 /* Use apple-provided syscall 754 * see: man 3 sysctl */ 755 UTIL_STATIC int UTIL_countPhysicalCores(void) 756 { 757 static int numPhysicalCores = 0; 758 759 if (numPhysicalCores != 0) return numPhysicalCores; 760 761 numPhysicalCores = (int)sysconf(_SC_NPROCESSORS_ONLN); 762 if (numPhysicalCores == -1) { 763 /* value not queryable, fall back on 1 */ 764 return numPhysicalCores = 1; 765 } 766 return numPhysicalCores; 767 } 768 769 #else 770 771 UTIL_STATIC int UTIL_countPhysicalCores(void) 772 { 773 /* assume 1 */ 774 return 1; 775 } 776 777 #endif 778 779 #if defined (__cplusplus) 780 } 781 #endif 782 783 #endif /* UTIL_H_MODULE */ 784