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, ZSTD_NANOSLEEP_SUPPORT, ZSTD_SETPRIORITY_SUPPORT */ 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, chmod */ 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 & priority 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 65 #elif PLATFORM_POSIX_VERSION > 0 /* Unix-like operating system */ 66 # include <unistd.h> /* sleep */ 67 # define UTIL_sleep(s) sleep(s) 68 # if ZSTD_NANOSLEEP_SUPPORT /* necessarily defined in platform.h */ 69 # define UTIL_sleepMilli(milli) { struct timespec t; t.tv_sec=0; t.tv_nsec=milli*1000000ULL; nanosleep(&t, NULL); } 70 # else 71 # define UTIL_sleepMilli(milli) /* disabled */ 72 # endif 73 # if ZSTD_SETPRIORITY_SUPPORT 74 # include <sys/resource.h> /* setpriority */ 75 # define SET_REALTIME_PRIORITY setpriority(PRIO_PROCESS, 0, -20) 76 # else 77 # define SET_REALTIME_PRIORITY /* disabled */ 78 # endif 79 80 #else /* unknown non-unix operating systen */ 81 # define UTIL_sleep(s) /* disabled */ 82 # define UTIL_sleepMilli(milli) /* disabled */ 83 # define SET_REALTIME_PRIORITY /* disabled */ 84 #endif 85 86 87 /* ************************************* 88 * Constants 89 ***************************************/ 90 #define LIST_SIZE_INCREASE (8*1024) 91 92 93 /*-**************************************** 94 * Compiler specifics 95 ******************************************/ 96 #if defined(__INTEL_COMPILER) 97 # pragma warning(disable : 177) /* disable: message #177: function was declared but never referenced, useful with UTIL_STATIC */ 98 #endif 99 #if defined(__GNUC__) 100 # define UTIL_STATIC static __attribute__((unused)) 101 #elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) 102 # define UTIL_STATIC static inline 103 #elif defined(_MSC_VER) 104 # define UTIL_STATIC static __inline 105 #else 106 # define UTIL_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */ 107 #endif 108 109 110 /*-**************************************** 111 * Console log 112 ******************************************/ 113 static int g_utilDisplayLevel; 114 #define UTIL_DISPLAY(...) fprintf(stderr, __VA_ARGS__) 115 #define UTIL_DISPLAYLEVEL(l, ...) { if (g_utilDisplayLevel>=l) { UTIL_DISPLAY(__VA_ARGS__); } } 116 117 118 /*-**************************************** 119 * Time functions 120 ******************************************/ 121 #if defined(_WIN32) /* Windows */ 122 #define UTIL_TIME_INITIALIZER { { 0, 0 } } 123 typedef LARGE_INTEGER UTIL_time_t; 124 125 UTIL_STATIC UTIL_time_t UTIL_getTime(void) { UTIL_time_t x; QueryPerformanceCounter(&x); return x; } 126 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) 127 { 128 static LARGE_INTEGER ticksPerSecond; 129 static int init = 0; 130 if (!init) { 131 if (!QueryPerformanceFrequency(&ticksPerSecond)) 132 UTIL_DISPLAYLEVEL(1, "ERROR: QueryPerformanceFrequency() failure\n"); 133 init = 1; 134 } 135 return 1000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart; 136 } 137 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) 138 { 139 static LARGE_INTEGER ticksPerSecond; 140 static int init = 0; 141 if (!init) { 142 if (!QueryPerformanceFrequency(&ticksPerSecond)) 143 UTIL_DISPLAYLEVEL(1, "ERROR: QueryPerformanceFrequency() failure\n"); 144 init = 1; 145 } 146 return 1000000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart; 147 } 148 149 #elif defined(__APPLE__) && defined(__MACH__) 150 151 #include <mach/mach_time.h> 152 #define UTIL_TIME_INITIALIZER 0 153 typedef U64 UTIL_time_t; 154 155 UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return mach_absolute_time(); } 156 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) 157 { 158 static mach_timebase_info_data_t rate; 159 static int init = 0; 160 if (!init) { 161 mach_timebase_info(&rate); 162 init = 1; 163 } 164 return (((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom))/1000ULL; 165 } 166 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) 167 { 168 static mach_timebase_info_data_t rate; 169 static int init = 0; 170 if (!init) { 171 mach_timebase_info(&rate); 172 init = 1; 173 } 174 return ((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom); 175 } 176 177 #elif (PLATFORM_POSIX_VERSION >= 200112L) \ 178 && (defined(__UCLIBC__) \ 179 || (defined(__GLIBC__) \ 180 && ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 17) \ 181 || (__GLIBC__ > 2)))) 182 183 #define UTIL_TIME_INITIALIZER { 0, 0 } 184 typedef struct timespec UTIL_freq_t; 185 typedef struct timespec UTIL_time_t; 186 187 UTIL_STATIC UTIL_time_t UTIL_getTime(void) 188 { 189 UTIL_time_t time; 190 if (clock_gettime(CLOCK_MONOTONIC, &time)) 191 UTIL_DISPLAYLEVEL(1, "ERROR: Failed to get time\n"); /* we could also exit() */ 192 return time; 193 } 194 195 UTIL_STATIC UTIL_time_t UTIL_getSpanTime(UTIL_time_t begin, UTIL_time_t end) 196 { 197 UTIL_time_t diff; 198 if (end.tv_nsec < begin.tv_nsec) { 199 diff.tv_sec = (end.tv_sec - 1) - begin.tv_sec; 200 diff.tv_nsec = (end.tv_nsec + 1000000000ULL) - begin.tv_nsec; 201 } else { 202 diff.tv_sec = end.tv_sec - begin.tv_sec; 203 diff.tv_nsec = end.tv_nsec - begin.tv_nsec; 204 } 205 return diff; 206 } 207 208 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t begin, UTIL_time_t end) 209 { 210 UTIL_time_t const diff = UTIL_getSpanTime(begin, end); 211 U64 micro = 0; 212 micro += 1000000ULL * diff.tv_sec; 213 micro += diff.tv_nsec / 1000ULL; 214 return micro; 215 } 216 217 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t begin, UTIL_time_t end) 218 { 219 UTIL_time_t const diff = UTIL_getSpanTime(begin, end); 220 U64 nano = 0; 221 nano += 1000000000ULL * diff.tv_sec; 222 nano += diff.tv_nsec; 223 return nano; 224 } 225 226 #else /* relies on standard C (note : clock_t measurements can be wrong when using multi-threading) */ 227 typedef clock_t UTIL_time_t; 228 #define UTIL_TIME_INITIALIZER 0 229 UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return clock(); } 230 UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } 231 UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } 232 #endif 233 234 #define SEC_TO_MICRO 1000000 235 236 /* returns time span in microseconds */ 237 UTIL_STATIC U64 UTIL_clockSpanMicro(UTIL_time_t clockStart ) 238 { 239 UTIL_time_t const clockEnd = UTIL_getTime(); 240 return UTIL_getSpanTimeMicro(clockStart, clockEnd); 241 } 242 243 /* returns time span in microseconds */ 244 UTIL_STATIC U64 UTIL_clockSpanNano(UTIL_time_t clockStart ) 245 { 246 UTIL_time_t const clockEnd = UTIL_getTime(); 247 return UTIL_getSpanTimeNano(clockStart, clockEnd); 248 } 249 250 UTIL_STATIC void UTIL_waitForNextTick(void) 251 { 252 UTIL_time_t const clockStart = UTIL_getTime(); 253 UTIL_time_t clockEnd; 254 do { 255 clockEnd = UTIL_getTime(); 256 } while (UTIL_getSpanTimeNano(clockStart, clockEnd) == 0); 257 } 258 259 260 261 /*-**************************************** 262 * File functions 263 ******************************************/ 264 #if defined(_MSC_VER) 265 #define chmod _chmod 266 typedef struct __stat64 stat_t; 267 #else 268 typedef struct stat stat_t; 269 #endif 270 271 272 UTIL_STATIC int UTIL_isRegularFile(const char* infilename); 273 274 275 UTIL_STATIC int UTIL_setFileStat(const char *filename, stat_t *statbuf) 276 { 277 int res = 0; 278 struct utimbuf timebuf; 279 280 if (!UTIL_isRegularFile(filename)) 281 return -1; 282 283 timebuf.actime = time(NULL); 284 timebuf.modtime = statbuf->st_mtime; 285 res += utime(filename, &timebuf); /* set access and modification times */ 286 287 #if !defined(_WIN32) 288 res += chown(filename, statbuf->st_uid, statbuf->st_gid); /* Copy ownership */ 289 #endif 290 291 res += chmod(filename, statbuf->st_mode & 07777); /* Copy file permissions */ 292 293 errno = 0; 294 return -res; /* number of errors is returned */ 295 } 296 297 298 UTIL_STATIC int UTIL_getFileStat(const char* infilename, stat_t *statbuf) 299 { 300 int r; 301 #if defined(_MSC_VER) 302 r = _stat64(infilename, statbuf); 303 if (r || !(statbuf->st_mode & S_IFREG)) return 0; /* No good... */ 304 #else 305 r = stat(infilename, statbuf); 306 if (r || !S_ISREG(statbuf->st_mode)) return 0; /* No good... */ 307 #endif 308 return 1; 309 } 310 311 312 UTIL_STATIC int UTIL_isRegularFile(const char* infilename) 313 { 314 stat_t statbuf; 315 return UTIL_getFileStat(infilename, &statbuf); /* Only need to know whether it is a regular file */ 316 } 317 318 319 UTIL_STATIC U32 UTIL_isDirectory(const char* infilename) 320 { 321 int r; 322 stat_t statbuf; 323 #if defined(_MSC_VER) 324 r = _stat64(infilename, &statbuf); 325 if (!r && (statbuf.st_mode & _S_IFDIR)) return 1; 326 #else 327 r = stat(infilename, &statbuf); 328 if (!r && S_ISDIR(statbuf.st_mode)) return 1; 329 #endif 330 return 0; 331 } 332 333 UTIL_STATIC U32 UTIL_isLink(const char* infilename) 334 { 335 /* macro guards, as defined in : https://linux.die.net/man/2/lstat */ 336 #ifndef __STRICT_ANSI__ 337 #if defined(_BSD_SOURCE) \ 338 || (defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE >= 500)) \ 339 || (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) \ 340 || (defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200112L)) \ 341 || (defined(__APPLE__) && defined(__MACH__)) 342 int r; 343 stat_t statbuf; 344 r = lstat(infilename, &statbuf); 345 if (!r && S_ISLNK(statbuf.st_mode)) return 1; 346 #endif 347 #endif 348 (void)infilename; 349 return 0; 350 } 351 352 353 #define UTIL_FILESIZE_UNKNOWN ((U64)(-1)) 354 UTIL_STATIC U64 UTIL_getFileSize(const char* infilename) 355 { 356 if (!UTIL_isRegularFile(infilename)) return UTIL_FILESIZE_UNKNOWN; 357 { int r; 358 #if defined(_MSC_VER) 359 struct __stat64 statbuf; 360 r = _stat64(infilename, &statbuf); 361 if (r || !(statbuf.st_mode & S_IFREG)) return UTIL_FILESIZE_UNKNOWN; 362 #elif defined(__MINGW32__) && defined (__MSVCRT__) 363 struct _stati64 statbuf; 364 r = _stati64(infilename, &statbuf); 365 if (r || !(statbuf.st_mode & S_IFREG)) return UTIL_FILESIZE_UNKNOWN; 366 #else 367 struct stat statbuf; 368 r = stat(infilename, &statbuf); 369 if (r || !S_ISREG(statbuf.st_mode)) return UTIL_FILESIZE_UNKNOWN; 370 #endif 371 return (U64)statbuf.st_size; 372 } 373 } 374 375 376 UTIL_STATIC U64 UTIL_getTotalFileSize(const char* const * const fileNamesTable, unsigned nbFiles) 377 { 378 U64 total = 0; 379 int error = 0; 380 unsigned n; 381 for (n=0; n<nbFiles; n++) { 382 U64 const size = UTIL_getFileSize(fileNamesTable[n]); 383 error |= (size == UTIL_FILESIZE_UNKNOWN); 384 total += size; 385 } 386 return error ? UTIL_FILESIZE_UNKNOWN : total; 387 } 388 389 390 /* 391 * A modified version of realloc(). 392 * If UTIL_realloc() fails the original block is freed. 393 */ 394 UTIL_STATIC void *UTIL_realloc(void *ptr, size_t size) 395 { 396 void *newptr = realloc(ptr, size); 397 if (newptr) return newptr; 398 free(ptr); 399 return NULL; 400 } 401 402 #ifdef _WIN32 403 # define UTIL_HAS_CREATEFILELIST 404 405 UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks) 406 { 407 char* path; 408 int dirLength, fnameLength, pathLength, nbFiles = 0; 409 WIN32_FIND_DATAA cFile; 410 HANDLE hFile; 411 412 dirLength = (int)strlen(dirName); 413 path = (char*) malloc(dirLength + 3); 414 if (!path) return 0; 415 416 memcpy(path, dirName, dirLength); 417 path[dirLength] = '\\'; 418 path[dirLength+1] = '*'; 419 path[dirLength+2] = 0; 420 421 hFile=FindFirstFileA(path, &cFile); 422 if (hFile == INVALID_HANDLE_VALUE) { 423 UTIL_DISPLAYLEVEL(1, "Cannot open directory '%s'\n", dirName); 424 return 0; 425 } 426 free(path); 427 428 do { 429 fnameLength = (int)strlen(cFile.cFileName); 430 path = (char*) malloc(dirLength + fnameLength + 2); 431 if (!path) { FindClose(hFile); return 0; } 432 memcpy(path, dirName, dirLength); 433 path[dirLength] = '\\'; 434 memcpy(path+dirLength+1, cFile.cFileName, fnameLength); 435 pathLength = dirLength+1+fnameLength; 436 path[pathLength] = 0; 437 if (cFile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) { 438 if (strcmp (cFile.cFileName, "..") == 0 || 439 strcmp (cFile.cFileName, ".") == 0) continue; 440 441 nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd, followLinks); /* Recursively call "UTIL_prepareFileList" with the new path. */ 442 if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; } 443 } 444 else if ((cFile.dwFileAttributes & FILE_ATTRIBUTE_NORMAL) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_ARCHIVE) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_COMPRESSED)) { 445 if (*bufStart + *pos + pathLength >= *bufEnd) { 446 ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE; 447 *bufStart = (char*)UTIL_realloc(*bufStart, newListSize); 448 *bufEnd = *bufStart + newListSize; 449 if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; } 450 } 451 if (*bufStart + *pos + pathLength < *bufEnd) { 452 strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos)); 453 *pos += pathLength + 1; 454 nbFiles++; 455 } 456 } 457 free(path); 458 } while (FindNextFileA(hFile, &cFile)); 459 460 FindClose(hFile); 461 return nbFiles; 462 } 463 464 #elif defined(__linux__) || (PLATFORM_POSIX_VERSION >= 200112L) /* opendir, readdir require POSIX.1-2001 */ 465 # define UTIL_HAS_CREATEFILELIST 466 # include <dirent.h> /* opendir, readdir */ 467 # include <string.h> /* strerror, memcpy */ 468 469 UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks) 470 { 471 DIR *dir; 472 struct dirent *entry; 473 char* path; 474 int dirLength, fnameLength, pathLength, nbFiles = 0; 475 476 if (!(dir = opendir(dirName))) { 477 UTIL_DISPLAYLEVEL(1, "Cannot open directory '%s': %s\n", dirName, strerror(errno)); 478 return 0; 479 } 480 481 dirLength = (int)strlen(dirName); 482 errno = 0; 483 while ((entry = readdir(dir)) != NULL) { 484 if (strcmp (entry->d_name, "..") == 0 || 485 strcmp (entry->d_name, ".") == 0) continue; 486 fnameLength = (int)strlen(entry->d_name); 487 path = (char*) malloc(dirLength + fnameLength + 2); 488 if (!path) { closedir(dir); return 0; } 489 memcpy(path, dirName, dirLength); 490 491 path[dirLength] = '/'; 492 memcpy(path+dirLength+1, entry->d_name, fnameLength); 493 pathLength = dirLength+1+fnameLength; 494 path[pathLength] = 0; 495 496 if (!followLinks && UTIL_isLink(path)) { 497 UTIL_DISPLAYLEVEL(2, "Warning : %s is a symbolic link, ignoring\n", path); 498 continue; 499 } 500 501 if (UTIL_isDirectory(path)) { 502 nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd, followLinks); /* Recursively call "UTIL_prepareFileList" with the new path. */ 503 if (*bufStart == NULL) { free(path); closedir(dir); return 0; } 504 } else { 505 if (*bufStart + *pos + pathLength >= *bufEnd) { 506 ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE; 507 *bufStart = (char*)UTIL_realloc(*bufStart, newListSize); 508 *bufEnd = *bufStart + newListSize; 509 if (*bufStart == NULL) { free(path); closedir(dir); return 0; } 510 } 511 if (*bufStart + *pos + pathLength < *bufEnd) { 512 strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos)); 513 *pos += pathLength + 1; 514 nbFiles++; 515 } 516 } 517 free(path); 518 errno = 0; /* clear errno after UTIL_isDirectory, UTIL_prepareFileList */ 519 } 520 521 if (errno != 0) { 522 UTIL_DISPLAYLEVEL(1, "readdir(%s) error: %s\n", dirName, strerror(errno)); 523 free(*bufStart); 524 *bufStart = NULL; 525 } 526 closedir(dir); 527 return nbFiles; 528 } 529 530 #else 531 532 UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks) 533 { 534 (void)bufStart; (void)bufEnd; (void)pos; (void)followLinks; 535 UTIL_DISPLAYLEVEL(1, "Directory %s ignored (compiled without _WIN32 or _POSIX_C_SOURCE)\n", dirName); 536 return 0; 537 } 538 539 #endif /* #ifdef _WIN32 */ 540 541 /* 542 * UTIL_createFileList - takes a list of files and directories (params: inputNames, inputNamesNb), scans directories, 543 * and returns a new list of files (params: return value, allocatedBuffer, allocatedNamesNb). 544 * After finishing usage of the list the structures should be freed with UTIL_freeFileList(params: return value, allocatedBuffer) 545 * In case of error UTIL_createFileList returns NULL and UTIL_freeFileList should not be called. 546 */ 547 UTIL_STATIC const char** 548 UTIL_createFileList(const char **inputNames, unsigned inputNamesNb, 549 char** allocatedBuffer, unsigned* allocatedNamesNb, 550 int followLinks) 551 { 552 size_t pos; 553 unsigned i, nbFiles; 554 char* buf = (char*)malloc(LIST_SIZE_INCREASE); 555 char* bufend = buf + LIST_SIZE_INCREASE; 556 const char** fileTable; 557 558 if (!buf) return NULL; 559 560 for (i=0, pos=0, nbFiles=0; i<inputNamesNb; i++) { 561 if (!UTIL_isDirectory(inputNames[i])) { 562 size_t const len = strlen(inputNames[i]); 563 if (buf + pos + len >= bufend) { 564 ptrdiff_t newListSize = (bufend - buf) + LIST_SIZE_INCREASE; 565 buf = (char*)UTIL_realloc(buf, newListSize); 566 bufend = buf + newListSize; 567 if (!buf) return NULL; 568 } 569 if (buf + pos + len < bufend) { 570 strncpy(buf + pos, inputNames[i], bufend - (buf + pos)); 571 pos += len + 1; 572 nbFiles++; 573 } 574 } else { 575 nbFiles += UTIL_prepareFileList(inputNames[i], &buf, &pos, &bufend, followLinks); 576 if (buf == NULL) return NULL; 577 } } 578 579 if (nbFiles == 0) { free(buf); return NULL; } 580 581 fileTable = (const char**)malloc((nbFiles+1) * sizeof(const char*)); 582 if (!fileTable) { free(buf); return NULL; } 583 584 for (i=0, pos=0; i<nbFiles; i++) { 585 fileTable[i] = buf + pos; 586 pos += strlen(fileTable[i]) + 1; 587 } 588 589 if (buf + pos > bufend) { free(buf); free((void*)fileTable); return NULL; } 590 591 *allocatedBuffer = buf; 592 *allocatedNamesNb = nbFiles; 593 594 return fileTable; 595 } 596 597 598 UTIL_STATIC void UTIL_freeFileList(const char** filenameTable, char* allocatedBuffer) 599 { 600 if (allocatedBuffer) free(allocatedBuffer); 601 if (filenameTable) free((void*)filenameTable); 602 } 603 604 /* count the number of physical cores */ 605 #if defined(_WIN32) || defined(WIN32) 606 607 #include <windows.h> 608 609 typedef BOOL(WINAPI* LPFN_GLPI)(PSYSTEM_LOGICAL_PROCESSOR_INFORMATION, PDWORD); 610 611 UTIL_STATIC int UTIL_countPhysicalCores(void) 612 { 613 static int numPhysicalCores = 0; 614 if (numPhysicalCores != 0) return numPhysicalCores; 615 616 { LPFN_GLPI glpi; 617 BOOL done = FALSE; 618 PSYSTEM_LOGICAL_PROCESSOR_INFORMATION buffer = NULL; 619 PSYSTEM_LOGICAL_PROCESSOR_INFORMATION ptr = NULL; 620 DWORD returnLength = 0; 621 size_t byteOffset = 0; 622 623 glpi = (LPFN_GLPI)GetProcAddress(GetModuleHandle(TEXT("kernel32")), 624 "GetLogicalProcessorInformation"); 625 626 if (glpi == NULL) { 627 goto failed; 628 } 629 630 while(!done) { 631 DWORD rc = glpi(buffer, &returnLength); 632 if (FALSE == rc) { 633 if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) { 634 if (buffer) 635 free(buffer); 636 buffer = (PSYSTEM_LOGICAL_PROCESSOR_INFORMATION)malloc(returnLength); 637 638 if (buffer == NULL) { 639 perror("zstd"); 640 exit(1); 641 } 642 } else { 643 /* some other error */ 644 goto failed; 645 } 646 } else { 647 done = TRUE; 648 } 649 } 650 651 ptr = buffer; 652 653 while (byteOffset + sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION) <= returnLength) { 654 655 if (ptr->Relationship == RelationProcessorCore) { 656 numPhysicalCores++; 657 } 658 659 ptr++; 660 byteOffset += sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION); 661 } 662 663 free(buffer); 664 665 return numPhysicalCores; 666 } 667 668 failed: 669 /* try to fall back on GetSystemInfo */ 670 { SYSTEM_INFO sysinfo; 671 GetSystemInfo(&sysinfo); 672 numPhysicalCores = sysinfo.dwNumberOfProcessors; 673 if (numPhysicalCores == 0) numPhysicalCores = 1; /* just in case */ 674 } 675 return numPhysicalCores; 676 } 677 678 #elif defined(__APPLE__) 679 680 #include <sys/sysctl.h> 681 682 /* Use apple-provided syscall 683 * see: man 3 sysctl */ 684 UTIL_STATIC int UTIL_countPhysicalCores(void) 685 { 686 static S32 numPhysicalCores = 0; /* apple specifies int32_t */ 687 if (numPhysicalCores != 0) return numPhysicalCores; 688 689 { size_t size = sizeof(S32); 690 int const ret = sysctlbyname("hw.physicalcpu", &numPhysicalCores, &size, NULL, 0); 691 if (ret != 0) { 692 if (errno == ENOENT) { 693 /* entry not present, fall back on 1 */ 694 numPhysicalCores = 1; 695 } else { 696 perror("zstd: can't get number of physical cpus"); 697 exit(1); 698 } 699 } 700 701 return numPhysicalCores; 702 } 703 } 704 705 #elif defined(__linux__) 706 707 /* parse /proc/cpuinfo 708 * siblings / cpu cores should give hyperthreading ratio 709 * otherwise fall back on sysconf */ 710 UTIL_STATIC int UTIL_countPhysicalCores(void) 711 { 712 static int numPhysicalCores = 0; 713 714 if (numPhysicalCores != 0) return numPhysicalCores; 715 716 numPhysicalCores = (int)sysconf(_SC_NPROCESSORS_ONLN); 717 if (numPhysicalCores == -1) { 718 /* value not queryable, fall back on 1 */ 719 return numPhysicalCores = 1; 720 } 721 722 /* try to determine if there's hyperthreading */ 723 { FILE* const cpuinfo = fopen("/proc/cpuinfo", "r"); 724 #define BUF_SIZE 80 725 char buff[BUF_SIZE]; 726 727 int siblings = 0; 728 int cpu_cores = 0; 729 int ratio = 1; 730 731 if (cpuinfo == NULL) { 732 /* fall back on the sysconf value */ 733 return numPhysicalCores; 734 } 735 736 /* assume the cpu cores/siblings values will be constant across all 737 * present processors */ 738 while (!feof(cpuinfo)) { 739 if (fgets(buff, BUF_SIZE, cpuinfo) != NULL) { 740 if (strncmp(buff, "siblings", 8) == 0) { 741 const char* const sep = strchr(buff, ':'); 742 if (*sep == '\0') { 743 /* formatting was broken? */ 744 goto failed; 745 } 746 747 siblings = atoi(sep + 1); 748 } 749 if (strncmp(buff, "cpu cores", 9) == 0) { 750 const char* const sep = strchr(buff, ':'); 751 if (*sep == '\0') { 752 /* formatting was broken? */ 753 goto failed; 754 } 755 756 cpu_cores = atoi(sep + 1); 757 } 758 } else if (ferror(cpuinfo)) { 759 /* fall back on the sysconf value */ 760 goto failed; 761 } 762 } 763 if (siblings && cpu_cores) { 764 ratio = siblings / cpu_cores; 765 } 766 failed: 767 fclose(cpuinfo); 768 return numPhysicalCores = numPhysicalCores / ratio; 769 } 770 } 771 772 #elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) 773 774 /* Use apple-provided syscall 775 * see: man 3 sysctl */ 776 UTIL_STATIC int UTIL_countPhysicalCores(void) 777 { 778 static int numPhysicalCores = 0; 779 780 if (numPhysicalCores != 0) return numPhysicalCores; 781 782 numPhysicalCores = (int)sysconf(_SC_NPROCESSORS_ONLN); 783 if (numPhysicalCores == -1) { 784 /* value not queryable, fall back on 1 */ 785 return numPhysicalCores = 1; 786 } 787 return numPhysicalCores; 788 } 789 790 #else 791 792 UTIL_STATIC int UTIL_countPhysicalCores(void) 793 { 794 /* assume 1 */ 795 return 1; 796 } 797 798 #endif 799 800 #if defined (__cplusplus) 801 } 802 #endif 803 804 #endif /* UTIL_H_MODULE */ 805