diff options
| -rw-r--r-- | os-win32.c | 11 | ||||
| -rw-r--r-- | qemu-timer.c | 24 |
2 files changed, 17 insertions, 18 deletions
diff --git a/os-win32.c b/os-win32.c index c7f6b5c6b0..50b7f6f885 100644 --- a/os-win32.c +++ b/os-win32.c @@ -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. */ diff --git a/qemu-timer.c b/qemu-timer.c index 8fb5c75df7..b2d95e2fec 100644 --- a/qemu-timer.c +++ b/qemu-timer.c @@ -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, |