mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-25 12:40:08 +00:00
64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
/*
|
|
* QEMU System Emulator
|
|
*
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
#include "qemu/timer.h"
|
|
|
|
/***********************************************************/
|
|
/* real time host monotonic timer */
|
|
|
|
#ifdef _WIN32
|
|
|
|
int64_t clock_freq;
|
|
|
|
static void __attribute__((constructor)) init_get_clock(void)
|
|
{
|
|
LARGE_INTEGER freq;
|
|
int ret;
|
|
ret = QueryPerformanceFrequency(&freq);
|
|
if (ret == 0) {
|
|
fprintf(stderr, "Could not calibrate ticks\n");
|
|
exit(1);
|
|
}
|
|
clock_freq = freq.QuadPart;
|
|
}
|
|
|
|
#else
|
|
|
|
int use_rt_clock;
|
|
|
|
static void __attribute__((constructor)) init_get_clock(void)
|
|
{
|
|
use_rt_clock = 0;
|
|
#if defined(__linux__) || (defined(__FreeBSD__) && __FreeBSD_version >= 500000) \
|
|
|| defined(__DragonFly__) || defined(__FreeBSD_kernel__) \
|
|
|| defined(__OpenBSD__)
|
|
{
|
|
struct timespec ts;
|
|
if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) {
|
|
use_rt_clock = 1;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|