system_utils_apple.cpp (1380B)
1 // 2 // Copyright 2020 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_apple.cpp: Implementation of OS-specific functions for Apple platforms 8 9 #include "system_utils.h" 10 11 #include <unistd.h> 12 13 #include <CoreServices/CoreServices.h> 14 #include <mach-o/dyld.h> 15 #include <mach/mach.h> 16 #include <mach/mach_time.h> 17 #include <cstdlib> 18 #include <vector> 19 20 #include <array> 21 22 namespace angle 23 { 24 std::string GetExecutablePath() 25 { 26 std::string result; 27 28 uint32_t size = 0; 29 _NSGetExecutablePath(nullptr, &size); 30 31 std::vector<char> buffer; 32 buffer.resize(size + 1); 33 34 _NSGetExecutablePath(buffer.data(), &size); 35 buffer[size] = '\0'; 36 37 if (!strrchr(buffer.data(), '/')) 38 { 39 return ""; 40 } 41 return buffer.data(); 42 } 43 44 std::string GetExecutableDirectory() 45 { 46 std::string executablePath = GetExecutablePath(); 47 size_t lastPathSepLoc = executablePath.find_last_of("/"); 48 return (lastPathSepLoc != std::string::npos) ? executablePath.substr(0, lastPathSepLoc) : ""; 49 } 50 51 double GetCurrentSystemTime() 52 { 53 mach_timebase_info_data_t timebaseInfo; 54 mach_timebase_info(&timebaseInfo); 55 56 double secondCoeff = timebaseInfo.numer * 1e-9 / timebaseInfo.denom; 57 return secondCoeff * mach_absolute_time(); 58 } 59 } // namespace angle