1 // 2 // Copyright 2015 The ANGLE Project Authors. All rights reserved. 3 // Use of this source code is governed by a BSD-style license that can be 4 // found in the LICENSE file. 5 // 6 7 // system_utils_linux.cpp: Implementation of OS-specific functions for Linux 8 9 #include "system_utils.h" 10 11 #include <sys/stat.h> 12 #include <sys/time.h> 13 #include <sys/types.h> 14 #include <unistd.h> 15 16 #include <array> 17 18 namespace angle 19 { GetExecutablePath()20std::string GetExecutablePath() 21 { 22 // We cannot use lstat to get the size of /proc/self/exe as it always returns 0 23 // so we just use a big buffer and hope the path fits in it. 24 char path[4096]; 25 26 ssize_t result = readlink("/proc/self/exe", path, sizeof(path) - 1); 27 if (result < 0 || static_cast<size_t>(result) >= sizeof(path) - 1) 28 { 29 return ""; 30 } 31 32 path[result] = '\0'; 33 return path; 34 } 35 GetExecutableDirectory()36std::string GetExecutableDirectory() 37 { 38 std::string executablePath = GetExecutablePath(); 39 size_t lastPathSepLoc = executablePath.find_last_of("/"); 40 return (lastPathSepLoc != std::string::npos) ? executablePath.substr(0, lastPathSepLoc) : ""; 41 } 42 GetSharedLibraryExtension()43const char *GetSharedLibraryExtension() 44 { 45 return "so"; 46 } 47 GetCurrentTime()48double GetCurrentTime() 49 { 50 struct timespec currentTime; 51 clock_gettime(CLOCK_MONOTONIC, ¤tTime); 52 return currentTime.tv_sec + currentTime.tv_nsec * 1e-9; 53 } 54 55 } // namespace angle 56