diff options
Diffstat (limited to 'programs/util.h')
| -rw-r--r-- | programs/util.h | 631 |
1 files changed, 28 insertions, 603 deletions
diff --git a/programs/util.h b/programs/util.h index 67aa7a56b967c..f78bcbe1b3f8c 100644 --- a/programs/util.h +++ b/programs/util.h @@ -16,15 +16,13 @@ extern "C" { #endif - /*-**************************************** * Dependencies ******************************************/ #include "platform.h" /* PLATFORM_POSIX_VERSION, ZSTD_NANOSLEEP_SUPPORT, ZSTD_SETPRIORITY_SUPPORT */ -#include <stdlib.h> /* malloc */ +#include <stdlib.h> /* malloc, realloc, free */ #include <stddef.h> /* size_t, ptrdiff_t */ #include <stdio.h> /* fprintf */ -#include <string.h> /* strncmp */ #include <sys/types.h> /* stat, utime */ #include <sys/stat.h> /* stat, chmod */ #if defined(_MSC_VER) @@ -35,11 +33,10 @@ extern "C" { # include <utime.h> /* utime */ #endif #include <time.h> /* clock_t, clock, CLOCKS_PER_SEC, nanosleep */ -#include <errno.h> #include "mem.h" /* U32, U64 */ -/* ************************************************************ +/*-************************************************************ * Avoid fseek()'s 2GiB barrier with MSVC, macOS, *BSD, MinGW ***************************************************************/ #if defined(_MSC_VER) && (_MSC_VER >= 1400) @@ -84,7 +81,7 @@ extern "C" { #endif -/* ************************************* +/*-************************************* * Constants ***************************************/ #define LIST_SIZE_INCREASE (8*1024) @@ -110,7 +107,7 @@ extern "C" { /*-**************************************** * Console log ******************************************/ -static int g_utilDisplayLevel; +extern int g_utilDisplayLevel; #define UTIL_DISPLAY(...) fprintf(stderr, __VA_ARGS__) #define UTIL_DISPLAYLEVEL(l, ...) { if (g_utilDisplayLevel>=l) { UTIL_DISPLAY(__VA_ARGS__); } } @@ -119,61 +116,16 @@ static int g_utilDisplayLevel; * Time functions ******************************************/ #if defined(_WIN32) /* Windows */ + #define UTIL_TIME_INITIALIZER { { 0, 0 } } typedef LARGE_INTEGER UTIL_time_t; - UTIL_STATIC UTIL_time_t UTIL_getTime(void) { UTIL_time_t x; QueryPerformanceCounter(&x); return x; } - UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) - { - static LARGE_INTEGER ticksPerSecond; - static int init = 0; - if (!init) { - if (!QueryPerformanceFrequency(&ticksPerSecond)) - UTIL_DISPLAYLEVEL(1, "ERROR: QueryPerformanceFrequency() failure\n"); - init = 1; - } - return 1000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart; - } - UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) - { - static LARGE_INTEGER ticksPerSecond; - static int init = 0; - if (!init) { - if (!QueryPerformanceFrequency(&ticksPerSecond)) - UTIL_DISPLAYLEVEL(1, "ERROR: QueryPerformanceFrequency() failure\n"); - init = 1; - } - return 1000000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart; - } - #elif defined(__APPLE__) && defined(__MACH__) #include <mach/mach_time.h> #define UTIL_TIME_INITIALIZER 0 typedef U64 UTIL_time_t; - UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return mach_absolute_time(); } - UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) - { - static mach_timebase_info_data_t rate; - static int init = 0; - if (!init) { - mach_timebase_info(&rate); - init = 1; - } - return (((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom))/1000ULL; - } - UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) - { - static mach_timebase_info_data_t rate; - static int init = 0; - if (!init) { - mach_timebase_info(&rate); - init = 1; - } - return ((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom); - } - #elif (PLATFORM_POSIX_VERSION >= 200112L) \ && (defined(__UCLIBC__) \ || (defined(__GLIBC__) \ @@ -184,79 +136,27 @@ static int g_utilDisplayLevel; typedef struct timespec UTIL_freq_t; typedef struct timespec UTIL_time_t; - UTIL_STATIC UTIL_time_t UTIL_getTime(void) - { - UTIL_time_t time; - if (clock_gettime(CLOCK_MONOTONIC, &time)) - UTIL_DISPLAYLEVEL(1, "ERROR: Failed to get time\n"); /* we could also exit() */ - return time; - } - - UTIL_STATIC UTIL_time_t UTIL_getSpanTime(UTIL_time_t begin, UTIL_time_t end) - { - UTIL_time_t diff; - if (end.tv_nsec < begin.tv_nsec) { - diff.tv_sec = (end.tv_sec - 1) - begin.tv_sec; - diff.tv_nsec = (end.tv_nsec + 1000000000ULL) - begin.tv_nsec; - } else { - diff.tv_sec = end.tv_sec - begin.tv_sec; - diff.tv_nsec = end.tv_nsec - begin.tv_nsec; - } - return diff; - } - - UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t begin, UTIL_time_t end) - { - UTIL_time_t const diff = UTIL_getSpanTime(begin, end); - U64 micro = 0; - micro += 1000000ULL * diff.tv_sec; - micro += diff.tv_nsec / 1000ULL; - return micro; - } - - UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t begin, UTIL_time_t end) - { - UTIL_time_t const diff = UTIL_getSpanTime(begin, end); - U64 nano = 0; - nano += 1000000000ULL * diff.tv_sec; - nano += diff.tv_nsec; - return nano; - } + UTIL_time_t UTIL_getSpanTime(UTIL_time_t begin, UTIL_time_t end); #else /* relies on standard C (note : clock_t measurements can be wrong when using multi-threading) */ + typedef clock_t UTIL_time_t; #define UTIL_TIME_INITIALIZER 0 - UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return clock(); } - UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } - UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } + #endif +UTIL_time_t UTIL_getTime(void); +U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd); +U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd); + #define SEC_TO_MICRO 1000000 /* returns time span in microseconds */ -UTIL_STATIC U64 UTIL_clockSpanMicro(UTIL_time_t clockStart ) -{ - UTIL_time_t const clockEnd = UTIL_getTime(); - return UTIL_getSpanTimeMicro(clockStart, clockEnd); -} +U64 UTIL_clockSpanMicro(UTIL_time_t clockStart); /* returns time span in microseconds */ -UTIL_STATIC U64 UTIL_clockSpanNano(UTIL_time_t clockStart ) -{ - UTIL_time_t const clockEnd = UTIL_getTime(); - return UTIL_getSpanTimeNano(clockStart, clockEnd); -} - -UTIL_STATIC void UTIL_waitForNextTick(void) -{ - UTIL_time_t const clockStart = UTIL_getTime(); - UTIL_time_t clockEnd; - do { - clockEnd = UTIL_getTime(); - } while (UTIL_getSpanTimeNano(clockStart, clockEnd) == 0); -} - - +U64 UTIL_clockSpanNano(UTIL_time_t clockStart); +void UTIL_waitForNextTick(void); /*-**************************************** * File functions @@ -269,129 +169,23 @@ UTIL_STATIC void UTIL_waitForNextTick(void) #endif -UTIL_STATIC int UTIL_isRegularFile(const char* infilename); - - -UTIL_STATIC int UTIL_setFileStat(const char *filename, stat_t *statbuf) -{ - int res = 0; - struct utimbuf timebuf; - - if (!UTIL_isRegularFile(filename)) - return -1; - - timebuf.actime = time(NULL); - timebuf.modtime = statbuf->st_mtime; - res += utime(filename, &timebuf); /* set access and modification times */ - -#if !defined(_WIN32) - res += chown(filename, statbuf->st_uid, statbuf->st_gid); /* Copy ownership */ -#endif - - res += chmod(filename, statbuf->st_mode & 07777); /* Copy file permissions */ - - errno = 0; - return -res; /* number of errors is returned */ -} - - -UTIL_STATIC int UTIL_getFileStat(const char* infilename, stat_t *statbuf) -{ - int r; -#if defined(_MSC_VER) - r = _stat64(infilename, statbuf); - if (r || !(statbuf->st_mode & S_IFREG)) return 0; /* No good... */ -#else - r = stat(infilename, statbuf); - if (r || !S_ISREG(statbuf->st_mode)) return 0; /* No good... */ -#endif - return 1; -} - - -UTIL_STATIC int UTIL_isRegularFile(const char* infilename) -{ - stat_t statbuf; - return UTIL_getFileStat(infilename, &statbuf); /* Only need to know whether it is a regular file */ -} - - -UTIL_STATIC U32 UTIL_isDirectory(const char* infilename) -{ - int r; - stat_t statbuf; -#if defined(_MSC_VER) - r = _stat64(infilename, &statbuf); - if (!r && (statbuf.st_mode & _S_IFDIR)) return 1; -#else - r = stat(infilename, &statbuf); - if (!r && S_ISDIR(statbuf.st_mode)) return 1; -#endif - return 0; -} - -UTIL_STATIC U32 UTIL_isLink(const char* infilename) -{ -/* macro guards, as defined in : https://linux.die.net/man/2/lstat */ -#ifndef __STRICT_ANSI__ -#if defined(_BSD_SOURCE) \ - || (defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE >= 500)) \ - || (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) \ - || (defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200112L)) \ - || (defined(__APPLE__) && defined(__MACH__)) - int r; - stat_t statbuf; - r = lstat(infilename, &statbuf); - if (!r && S_ISLNK(statbuf.st_mode)) return 1; -#endif -#endif - (void)infilename; - return 0; -} - +int UTIL_fileExist(const char* filename); +int UTIL_isRegularFile(const char* infilename); +int UTIL_setFileStat(const char* filename, stat_t* statbuf); +U32 UTIL_isDirectory(const char* infilename); +int UTIL_getFileStat(const char* infilename, stat_t* statbuf); +U32 UTIL_isLink(const char* infilename); #define UTIL_FILESIZE_UNKNOWN ((U64)(-1)) -UTIL_STATIC U64 UTIL_getFileSize(const char* infilename) -{ - if (!UTIL_isRegularFile(infilename)) return UTIL_FILESIZE_UNKNOWN; - { int r; -#if defined(_MSC_VER) - struct __stat64 statbuf; - r = _stat64(infilename, &statbuf); - if (r || !(statbuf.st_mode & S_IFREG)) return UTIL_FILESIZE_UNKNOWN; -#elif defined(__MINGW32__) && defined (__MSVCRT__) - struct _stati64 statbuf; - r = _stati64(infilename, &statbuf); - if (r || !(statbuf.st_mode & S_IFREG)) return UTIL_FILESIZE_UNKNOWN; -#else - struct stat statbuf; - r = stat(infilename, &statbuf); - if (r || !S_ISREG(statbuf.st_mode)) return UTIL_FILESIZE_UNKNOWN; -#endif - return (U64)statbuf.st_size; - } -} - - -UTIL_STATIC U64 UTIL_getTotalFileSize(const char* const * const fileNamesTable, unsigned nbFiles) -{ - U64 total = 0; - int error = 0; - unsigned n; - for (n=0; n<nbFiles; n++) { - U64 const size = UTIL_getFileSize(fileNamesTable[n]); - error |= (size == UTIL_FILESIZE_UNKNOWN); - total += size; - } - return error ? UTIL_FILESIZE_UNKNOWN : total; -} +U64 UTIL_getFileSize(const char* infilename); +U64 UTIL_getTotalFileSize(const char* const * const fileNamesTable, unsigned nbFiles); /* * A modified version of realloc(). * If UTIL_realloc() fails the original block is freed. */ -UTIL_STATIC void *UTIL_realloc(void *ptr, size_t size) +UTIL_STATIC void* UTIL_realloc(void *ptr, size_t size) { void *newptr = realloc(ptr, size); if (newptr) return newptr; @@ -399,143 +193,14 @@ UTIL_STATIC void *UTIL_realloc(void *ptr, size_t size) return NULL; } +int UTIL_prepareFileList(const char* dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks); #ifdef _WIN32 # define UTIL_HAS_CREATEFILELIST - -UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks) -{ - char* path; - int dirLength, fnameLength, pathLength, nbFiles = 0; - WIN32_FIND_DATAA cFile; - HANDLE hFile; - - dirLength = (int)strlen(dirName); - path = (char*) malloc(dirLength + 3); - if (!path) return 0; - - memcpy(path, dirName, dirLength); - path[dirLength] = '\\'; - path[dirLength+1] = '*'; - path[dirLength+2] = 0; - - hFile=FindFirstFileA(path, &cFile); - if (hFile == INVALID_HANDLE_VALUE) { - UTIL_DISPLAYLEVEL(1, "Cannot open directory '%s'\n", dirName); - return 0; - } - free(path); - - do { - fnameLength = (int)strlen(cFile.cFileName); - path = (char*) malloc(dirLength + fnameLength + 2); - if (!path) { FindClose(hFile); return 0; } - memcpy(path, dirName, dirLength); - path[dirLength] = '\\'; - memcpy(path+dirLength+1, cFile.cFileName, fnameLength); - pathLength = dirLength+1+fnameLength; - path[pathLength] = 0; - if (cFile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) { - if (strcmp (cFile.cFileName, "..") == 0 || - strcmp (cFile.cFileName, ".") == 0) continue; - - nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd, followLinks); /* Recursively call "UTIL_prepareFileList" with the new path. */ - if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; } - } - else if ((cFile.dwFileAttributes & FILE_ATTRIBUTE_NORMAL) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_ARCHIVE) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_COMPRESSED)) { - if (*bufStart + *pos + pathLength >= *bufEnd) { - ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE; - *bufStart = (char*)UTIL_realloc(*bufStart, newListSize); - *bufEnd = *bufStart + newListSize; - if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; } - } - if (*bufStart + *pos + pathLength < *bufEnd) { - strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos)); - *pos += pathLength + 1; - nbFiles++; - } - } - free(path); - } while (FindNextFileA(hFile, &cFile)); - - FindClose(hFile); - return nbFiles; -} - #elif defined(__linux__) || (PLATFORM_POSIX_VERSION >= 200112L) /* opendir, readdir require POSIX.1-2001 */ # define UTIL_HAS_CREATEFILELIST # include <dirent.h> /* opendir, readdir */ # include <string.h> /* strerror, memcpy */ - -UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks) -{ - DIR *dir; - struct dirent *entry; - char* path; - int dirLength, fnameLength, pathLength, nbFiles = 0; - - if (!(dir = opendir(dirName))) { - UTIL_DISPLAYLEVEL(1, "Cannot open directory '%s': %s\n", dirName, strerror(errno)); - return 0; - } - - dirLength = (int)strlen(dirName); - errno = 0; - while ((entry = readdir(dir)) != NULL) { - if (strcmp (entry->d_name, "..") == 0 || - strcmp (entry->d_name, ".") == 0) continue; - fnameLength = (int)strlen(entry->d_name); - path = (char*) malloc(dirLength + fnameLength + 2); - if (!path) { closedir(dir); return 0; } - memcpy(path, dirName, dirLength); - - path[dirLength] = '/'; - memcpy(path+dirLength+1, entry->d_name, fnameLength); - pathLength = dirLength+1+fnameLength; - path[pathLength] = 0; - - if (!followLinks && UTIL_isLink(path)) { - UTIL_DISPLAYLEVEL(2, "Warning : %s is a symbolic link, ignoring\n", path); - continue; - } - - if (UTIL_isDirectory(path)) { - nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd, followLinks); /* Recursively call "UTIL_prepareFileList" with the new path. */ - if (*bufStart == NULL) { free(path); closedir(dir); return 0; } - } else { - if (*bufStart + *pos + pathLength >= *bufEnd) { - ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE; - *bufStart = (char*)UTIL_realloc(*bufStart, newListSize); - *bufEnd = *bufStart + newListSize; - if (*bufStart == NULL) { free(path); closedir(dir); return 0; } - } - if (*bufStart + *pos + pathLength < *bufEnd) { - strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos)); - *pos += pathLength + 1; - nbFiles++; - } - } - free(path); - errno = 0; /* clear errno after UTIL_isDirectory, UTIL_prepareFileList */ - } - - if (errno != 0) { - UTIL_DISPLAYLEVEL(1, "readdir(%s) error: %s\n", dirName, strerror(errno)); - free(*bufStart); - *bufStart = NULL; - } - closedir(dir); - return nbFiles; -} - #else - -UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks) -{ - (void)bufStart; (void)bufEnd; (void)pos; (void)followLinks; - UTIL_DISPLAYLEVEL(1, "Directory %s ignored (compiled without _WIN32 or _POSIX_C_SOURCE)\n", dirName); - return 0; -} - #endif /* #ifdef _WIN32 */ /* @@ -544,56 +209,10 @@ UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_ * After finishing usage of the list the structures should be freed with UTIL_freeFileList(params: return value, allocatedBuffer) * In case of error UTIL_createFileList returns NULL and UTIL_freeFileList should not be called. */ -UTIL_STATIC const char** +const char** UTIL_createFileList(const char **inputNames, unsigned inputNamesNb, char** allocatedBuffer, unsigned* allocatedNamesNb, - int followLinks) -{ - size_t pos; - unsigned i, nbFiles; - char* buf = (char*)malloc(LIST_SIZE_INCREASE); - char* bufend = buf + LIST_SIZE_INCREASE; - const char** fileTable; - - if (!buf) return NULL; - - for (i=0, pos=0, nbFiles=0; i<inputNamesNb; i++) { - if (!UTIL_isDirectory(inputNames[i])) { - size_t const len = strlen(inputNames[i]); - if (buf + pos + len >= bufend) { - ptrdiff_t newListSize = (bufend - buf) + LIST_SIZE_INCREASE; - buf = (char*)UTIL_realloc(buf, newListSize); - bufend = buf + newListSize; - if (!buf) return NULL; - } - if (buf + pos + len < bufend) { - strncpy(buf + pos, inputNames[i], bufend - (buf + pos)); - pos += len + 1; - nbFiles++; - } - } else { - nbFiles += UTIL_prepareFileList(inputNames[i], &buf, &pos, &bufend, followLinks); - if (buf == NULL) return NULL; - } } - - if (nbFiles == 0) { free(buf); return NULL; } - - fileTable = (const char**)malloc((nbFiles+1) * sizeof(const char*)); - if (!fileTable) { free(buf); return NULL; } - - for (i=0, pos=0; i<nbFiles; i++) { - fileTable[i] = buf + pos; - pos += strlen(fileTable[i]) + 1; - } - - if (buf + pos > bufend) { free(buf); free((void*)fileTable); return NULL; } - - *allocatedBuffer = buf; - *allocatedNamesNb = nbFiles; - - return fileTable; -} - + int followLinks); UTIL_STATIC void UTIL_freeFileList(const char** filenameTable, char* allocatedBuffer) { @@ -601,201 +220,7 @@ UTIL_STATIC void UTIL_freeFileList(const char** filenameTable, char* allocatedBu if (filenameTable) free((void*)filenameTable); } -/* count the number of physical cores */ -#if defined(_WIN32) || defined(WIN32) - -#include <windows.h> - -typedef BOOL(WINAPI* LPFN_GLPI)(PSYSTEM_LOGICAL_PROCESSOR_INFORMATION, PDWORD); - -UTIL_STATIC int UTIL_countPhysicalCores(void) -{ - static int numPhysicalCores = 0; - if (numPhysicalCores != 0) return numPhysicalCores; - - { LPFN_GLPI glpi; - BOOL done = FALSE; - PSYSTEM_LOGICAL_PROCESSOR_INFORMATION buffer = NULL; - PSYSTEM_LOGICAL_PROCESSOR_INFORMATION ptr = NULL; - DWORD returnLength = 0; - size_t byteOffset = 0; - - glpi = (LPFN_GLPI)GetProcAddress(GetModuleHandle(TEXT("kernel32")), - "GetLogicalProcessorInformation"); - - if (glpi == NULL) { - goto failed; - } - - while(!done) { - DWORD rc = glpi(buffer, &returnLength); - if (FALSE == rc) { - if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) { - if (buffer) - free(buffer); - buffer = (PSYSTEM_LOGICAL_PROCESSOR_INFORMATION)malloc(returnLength); - - if (buffer == NULL) { - perror("zstd"); - exit(1); - } - } else { - /* some other error */ - goto failed; - } - } else { - done = TRUE; - } - } - - ptr = buffer; - - while (byteOffset + sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION) <= returnLength) { - - if (ptr->Relationship == RelationProcessorCore) { - numPhysicalCores++; - } - - ptr++; - byteOffset += sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION); - } - - free(buffer); - - return numPhysicalCores; - } - -failed: - /* try to fall back on GetSystemInfo */ - { SYSTEM_INFO sysinfo; - GetSystemInfo(&sysinfo); - numPhysicalCores = sysinfo.dwNumberOfProcessors; - if (numPhysicalCores == 0) numPhysicalCores = 1; /* just in case */ - } - return numPhysicalCores; -} - -#elif defined(__APPLE__) - -#include <sys/sysctl.h> - -/* Use apple-provided syscall - * see: man 3 sysctl */ -UTIL_STATIC int UTIL_countPhysicalCores(void) -{ - static S32 numPhysicalCores = 0; /* apple specifies int32_t */ - if (numPhysicalCores != 0) return numPhysicalCores; - - { size_t size = sizeof(S32); - int const ret = sysctlbyname("hw.physicalcpu", &numPhysicalCores, &size, NULL, 0); - if (ret != 0) { - if (errno == ENOENT) { - /* entry not present, fall back on 1 */ - numPhysicalCores = 1; - } else { - perror("zstd: can't get number of physical cpus"); - exit(1); - } - } - - return numPhysicalCores; - } -} - -#elif defined(__linux__) - -/* parse /proc/cpuinfo - * siblings / cpu cores should give hyperthreading ratio - * otherwise fall back on sysconf */ -UTIL_STATIC int UTIL_countPhysicalCores(void) -{ - static int numPhysicalCores = 0; - - if (numPhysicalCores != 0) return numPhysicalCores; - - numPhysicalCores = (int)sysconf(_SC_NPROCESSORS_ONLN); - if (numPhysicalCores == -1) { - /* value not queryable, fall back on 1 */ - return numPhysicalCores = 1; - } - - /* try to determine if there's hyperthreading */ - { FILE* const cpuinfo = fopen("/proc/cpuinfo", "r"); -#define BUF_SIZE 80 - char buff[BUF_SIZE]; - - int siblings = 0; - int cpu_cores = 0; - int ratio = 1; - - if (cpuinfo == NULL) { - /* fall back on the sysconf value */ - return numPhysicalCores; - } - - /* assume the cpu cores/siblings values will be constant across all - * present processors */ - while (!feof(cpuinfo)) { - if (fgets(buff, BUF_SIZE, cpuinfo) != NULL) { - if (strncmp(buff, "siblings", 8) == 0) { - const char* const sep = strchr(buff, ':'); - if (*sep == '\0') { - /* formatting was broken? */ - goto failed; - } - - siblings = atoi(sep + 1); - } - if (strncmp(buff, "cpu cores", 9) == 0) { - const char* const sep = strchr(buff, ':'); - if (*sep == '\0') { - /* formatting was broken? */ - goto failed; - } - - cpu_cores = atoi(sep + 1); - } - } else if (ferror(cpuinfo)) { - /* fall back on the sysconf value */ - goto failed; - } - } - if (siblings && cpu_cores) { - ratio = siblings / cpu_cores; - } -failed: - fclose(cpuinfo); - return numPhysicalCores = numPhysicalCores / ratio; - } -} - -#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) - -/* Use apple-provided syscall - * see: man 3 sysctl */ -UTIL_STATIC int UTIL_countPhysicalCores(void) -{ - static int numPhysicalCores = 0; - - if (numPhysicalCores != 0) return numPhysicalCores; - - numPhysicalCores = (int)sysconf(_SC_NPROCESSORS_ONLN); - if (numPhysicalCores == -1) { - /* value not queryable, fall back on 1 */ - return numPhysicalCores = 1; - } - return numPhysicalCores; -} - -#else - -UTIL_STATIC int UTIL_countPhysicalCores(void) -{ - /* assume 1 */ - return 1; -} - -#endif +int UTIL_countPhysicalCores(void); #if defined (__cplusplus) } |