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56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
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// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
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// This code is based on Lua 5.x implementation licensed under MIT License; see lua_LICENSE.txt for details
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#include "lua.h"
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#ifdef _WIN32
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#include <Windows.h>
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#endif
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#ifdef __APPLE__
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#include <mach/mach.h>
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#include <mach/mach_time.h>
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#endif
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#include <time.h>
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static double clock_period()
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{
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#if defined(_WIN32)
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LARGE_INTEGER result = {};
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QueryPerformanceFrequency(&result);
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return 1.0 / double(result.QuadPart);
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#elif defined(__APPLE__)
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mach_timebase_info_data_t result = {};
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mach_timebase_info(&result);
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return double(result.numer) / double(result.denom) * 1e-9;
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#elif defined(__linux__)
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return 1e-9;
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#else
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return 1.0 / double(CLOCKS_PER_SEC);
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#endif
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}
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static double clock_timestamp()
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{
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#if defined(_WIN32)
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LARGE_INTEGER result = {};
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QueryPerformanceCounter(&result);
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return double(result.QuadPart);
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#elif defined(__APPLE__)
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return double(mach_absolute_time());
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#elif defined(__linux__)
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timespec now;
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clock_gettime(CLOCK_MONOTONIC, &now);
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return now.tv_sec * 1e9 + now.tv_nsec;
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#else
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return double(clock());
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#endif
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}
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double lua_clock()
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{
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static double period = clock_period();
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return clock_timestamp() * period;
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}
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