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Diffstat (limited to 'src/system/clock.c')
| -rw-r--r-- | src/system/clock.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/src/system/clock.c b/src/system/clock.c new file mode 100644 index 000000000..d987aed48 --- /dev/null +++ b/src/system/clock.c @@ -0,0 +1,98 @@ +/* + * Copyright (C) 2003-2012 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "clock.h" + +#ifdef WIN32 +#include <windows.h> +#elif defined(__APPLE__) +#include <mach/mach_time.h> +#else +#include <time.h> +#ifndef CLOCK_MONOTONIC +#include <sys/time.h> +#endif +#endif + +unsigned +monotonic_clock_ms(void) +{ +#ifdef WIN32 + return GetTickCount(); +#elif defined(__APPLE__) /* OS X does not define CLOCK_MONOTONIC */ + static mach_timebase_info_data_t base; + if (base.denom == 0) + (void)mach_timebase_info(&base); + + return (unsigned)((mach_absolute_time() * base.numer) + / (1000000 * base.denom)); +#elif defined(CLOCK_MONOTONIC) + struct timespec ts; + clock_gettime(CLOCK_MONOTONIC, &ts); + return ts.tv_sec * 1000 + ts.tv_nsec / 1000000; +#else + /* we have no monotonic clock, fall back to gettimeofday() */ + struct timeval tv; + gettimeofday(&tv, 0); + return tv.tv_sec * 1000 + tv.tv_usec / 1000; +#endif +} + +uint64_t +monotonic_clock_us(void) +{ +#ifdef WIN32 + LARGE_INTEGER l_value, l_frequency; + + if (!QueryPerformanceCounter(&l_value) || + !QueryPerformanceFrequency(&l_frequency)) + return 0; + + uint64_t value = l_value.QuadPart; + uint64_t frequency = l_frequency.QuadPart; + + if (frequency > 1000000) { + value *= 10000; + value /= frequency / 100; + } else if (frequency < 1000000) { + value *= 10000; + value /= frequency; + value *= 100; + } + + return value; +#elif defined(__APPLE__) /* OS X does not define CLOCK_MONOTONIC */ + static mach_timebase_info_data_t base; + if (base.denom == 0) + (void)mach_timebase_info(&base); + + return ((uint64_t)mach_absolute_time() * (uint64_t)base.numer) + / (1000 * (uint64_t)base.denom); +#elif defined(CLOCK_MONOTONIC) + struct timespec ts; + clock_gettime(CLOCK_MONOTONIC, &ts); + return (uint64_t)ts.tv_sec * 1000000 + (uint64_t)(ts.tv_nsec / 1000); +#else + /* we have no monotonic clock, fall back to gettimeofday() */ + struct timeval tv; + gettimeofday(&tv, 0); + return (uint64_t)tv.tv_sec * 1000 + (uint64_t)tv.tv_usec; +#endif +} + |