115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/*
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This is free and unencumbered software released into the public domain.
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Anyone is free to copy, modify, publish, use, compile, sell, or
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distribute this software, either in source code form or as a compiled
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binary, for any purpose, commercial or non-commercial, and by any
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means.
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In jurisdictions that recognize copyright laws, the author or authors
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of this software dedicate any and all copyright interest in the
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software to the public domain. We make this dedication for the benefit
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of the public at large and to the detriment of our heirs and
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successors. We intend this dedication to be an overt act of
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relinquishment in perpetuity of all present and future rights to this
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software under copyright law.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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For more information, please refer to <http://unlicense.org/>
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*/
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#define _GNU_SOURCE
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#define _POSIX_C_SOURCE 1999309L
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#include "clock.h"
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#ifdef _WIN32
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#define WIN32_MEAN_AND_LEAN
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#include <windows.h>
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#else
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#include <time.h>
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#include <unistd.h>
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#include <stdlib.h>
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#endif
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/*
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* Returns the current absolute time in microsecods
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* TODO: Specify since when the time is calculated
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*/
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uint64_t get_absolute_time_us(void)
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{
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#ifdef _WIN32
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FILETIME filetime;
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GetSystemTimePreciseAsFileTime(&filetime);
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uint64_t time = (uint64_t) filetime.dwLowDateTime | ((uint64_t) filetime.dwHighDateTime << 32);
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time /= 10;
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return time;
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#else
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struct timespec buffer;
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if (clock_gettime(CLOCK_REALTIME, &buffer))
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abort();
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uint64_t time = buffer.tv_sec * 1000000 + buffer.tv_nsec / 1000;
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return time;
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#endif
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}
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/*
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* Returns the current time in nanoseconds since
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* an unspecified point in time.
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*/
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uint64_t get_relative_time_ns(void)
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{
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#ifdef _WIN32
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{
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int64_t count;
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int64_t freq;
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int ok;
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ok = QueryPerformanceCounter((LARGE_INTEGER*) &count);
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if (!ok) abort();
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ok = QueryPerformanceFrequency((LARGE_INTEGER*) &freq);
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if (!ok) abort();
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uint64_t res = 1000000000 * (double) count / freq;
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return res;
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}
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#else
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{
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struct timespec time;
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if (clock_gettime(CLOCK_REALTIME, &time))
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abort();
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uint64_t res;
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uint64_t sec = time.tv_sec;
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if (sec > UINT64_MAX / 1000000000)
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abort();
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res = sec * 1000000000;
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uint64_t nsec = time.tv_nsec;
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if (res > UINT64_MAX - nsec)
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abort();
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res += nsec;
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return res;
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}
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#endif
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}
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void sleep_ms(float ms)
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{
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#ifdef _WIN32
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Sleep(ms);
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#else
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usleep(ms*1000);
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#endif
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} |