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qemu-timer: move timeBeginPeriod/timeEndPeriod to os-win32 

These are needed for any of the Win32 alarm timer implementations.
They are not tied to mmtimer exclusively.

Jacob tested this patch with both mmtimer and Win32 timers.

Cc: qemu-stable@nongnu.org
Tested-by: Jacob Kroon <jacob.kroon@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
This commit is contained in:
Paolo Bonzini 2013-02-20 14:43:31 +01:00 committed by Stefan Weil
parent 1046127d1f
commit 0727b86754
2 changed files with 17 additions and 18 deletions
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11
os-win32.c
View File

@ -23,6 +23,7 @@
* THE SOFTWARE.
*/
#include <windows.h>
#include <mmsystem.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
@ -67,9 +68,19 @@ static BOOL WINAPI qemu_ctrl_handler(DWORD type)
return TRUE;
}
static TIMECAPS mm_tc;
static void os_undo_timer_resolution(void)
{
timeEndPeriod(mm_tc.wPeriodMin);
}
void os_setup_early_signal_handling(void)
{
SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE);
timeGetDevCaps(&mm_tc, sizeof(mm_tc));
timeBeginPeriod(mm_tc.wPeriodMin);
atexit(os_undo_timer_resolution);
}
/* Look for support files in the same directory as the executable. */

24
qemu-timer.c
View File

@ -624,28 +624,14 @@ static void CALLBACK mm_alarm_handler(UINT uTimerID, UINT uMsg,
static int mm_start_timer(struct qemu_alarm_timer *t)
{
timeGetDevCaps(&mm_tc, sizeof(mm_tc));
timeBeginPeriod(mm_tc.wPeriodMin);
mm_timer = timeSetEvent(mm_tc.wPeriodMin, /* interval (ms) */
mm_tc.wPeriodMin, /* resolution */
mm_alarm_handler, /* function */
(DWORD_PTR)t, /* parameter */
TIME_ONESHOT | TIME_CALLBACK_FUNCTION);
if (!mm_timer) {
fprintf(stderr, "Failed to initialize win32 alarm timer\n");
timeEndPeriod(mm_tc.wPeriodMin);
return -1;
}
return 0;
}
static void mm_stop_timer(struct qemu_alarm_timer *t)
{
timeKillEvent(mm_timer);
timeEndPeriod(mm_tc.wPeriodMin);
if (mm_timer) {
timeKillEvent(mm_timer);
}
}
static void mm_rearm_timer(struct qemu_alarm_timer *t, int64_t delta)
@ -657,7 +643,9 @@ static void mm_rearm_timer(struct qemu_alarm_timer *t, int64_t delta)
nearest_delta_ms = mm_tc.wPeriodMax;
}
timeKillEvent(mm_timer);
if (mm_timer) {
timeKillEvent(mm_timer);
}
mm_timer = timeSetEvent((UINT)nearest_delta_ms,
mm_tc.wPeriodMin,
mm_alarm_handler,