mirror of
https://github.com/qemu/qemu.git
synced 2024-12-11 12:43:55 +08:00
a284f798f3
Some older parts of QEMU's codebase assume that CLOCK_MONOTONIC might not be defined by the host OS, and have workarounds to deal with this. However, more recently (notably in commit50290c002cfor qemu-img in mid-2019, but also much earlier in 2011 in commit22795174a3for ui/spice-display.c) we've written code that assumes CLOCK_MONOTONIC is always defined. The only host OS anybody's ever noticed this on is OSX 10.11 and earlier, which we don't support. So we can assume that all our host OSes have the #define, and we can remove some now-unnecessary ifdefs. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20200201172252.6605-1-peter.maydell@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
60 lines
1.8 KiB
C
60 lines
1.8 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/osdep.h"
|
|
#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)
|
|
{
|
|
struct timespec ts;
|
|
|
|
use_rt_clock = 0;
|
|
if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) {
|
|
use_rt_clock = 1;
|
|
}
|
|
}
|
|
#endif
|