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winmm: Fix computation of sleep time until next timeout.

This commit is contained in:
Alexandre Julliard 2007-06-07 16:22:48 +02:00
parent 622f62d352
commit 90d94efe10
1 changed files with 20 additions and 28 deletions
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44
dlls/winmm/time.c
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@ -113,7 +113,7 @@ static void TIME_TriggerCallBack(LPWINE_TIMERENTRY lpTimer)
/**************************************************************************
* TIME_MMSysTimeCallback
*/
static DWORD CALLBACK TIME_MMSysTimeCallback(LPWINE_MM_IDATA iData)
static int TIME_MMSysTimeCallback(LPWINE_MM_IDATA iData)
{
static int nSizeLpTimers;
static LPWINE_TIMERENTRY lpTimers;
@ -121,14 +121,7 @@ static LPWINE_TIMERENTRY lpTimers;
LPWINE_TIMERENTRY timer, *ptimer, *next_ptimer;
int idx;
DWORD cur_time;
DWORD delta_time;
DWORD ret_time = INFINITE;
DWORD adjust_time;
/* optimize for the most frequent case - no events */
if (! TIME_TimersList)
return(ret_time);
int delta_time, ret_time = -1;
/* since timeSetEvent() and timeKillEvent() can be called
* from 16 bit code, there are cases where win16 lock is
@ -151,7 +144,8 @@ static LPWINE_TIMERENTRY lpTimers;
for (ptimer = &TIME_TimersList; *ptimer != NULL; ) {
timer = *ptimer;
next_ptimer = &timer->lpNext;
if (cur_time >= timer->dwTriggerTime)
delta_time = timer->dwTriggerTime - cur_time;
if (delta_time <= 0)
{
if (timer->lpFunc) {
if (idx == nSizeLpTimers) {
@ -180,23 +174,22 @@ static LPWINE_TIMERENTRY lpTimers;
HeapFree(GetProcessHeap(), 0, timer);
/* We don't need to trigger oneshots again */
delta_time = INFINITE;
delta_time = -1;
}
else
{
/* Compute when this event needs this function
to be called again */
if (timer->dwTriggerTime <= cur_time)
delta_time = 0;
else
delta_time = timer->dwTriggerTime - cur_time;
if (delta_time < 0) delta_time = 0;
}
}
else
delta_time = timer->dwTriggerTime - cur_time;
/* Determine when we need to return to this function */
ret_time = min(ret_time, delta_time);
if (delta_time != -1)
{
if (ret_time == -1 || ret_time > delta_time) ret_time = delta_time;
}
ptimer = next_ptimer;
}
@ -209,15 +202,15 @@ static LPWINE_TIMERENTRY lpTimers;
/* Finally, adjust the recommended wait time downward
by the amount of time the processing routines
actually took */
adjust_time = GetTickCount() - cur_time;
if (adjust_time > ret_time)
ret_time = 0;
else
ret_time -= adjust_time;
if (ret_time != -1)
{
ret_time -= GetTickCount() - cur_time;
if (ret_time < 0) ret_time = 0;
}
/* We return the amount of time our caller should sleep
before needing to check in on us again */
return(ret_time);
return ret_time;
}
/**************************************************************************
@ -226,7 +219,6 @@ static LPWINE_TIMERENTRY lpTimers;
static DWORD CALLBACK TIME_MMSysTimeThread(LPVOID arg)
{
LPWINE_MM_IDATA iData = (LPWINE_MM_IDATA)arg;
DWORD sleep_time;
DWORD rc;
TRACE("Starting main winmm thread\n");
@ -239,12 +231,12 @@ static DWORD CALLBACK TIME_MMSysTimeThread(LPVOID arg)
while (! TIME_TimeToDie)
{
sleep_time = TIME_MMSysTimeCallback(iData);
int sleep_time = TIME_MMSysTimeCallback(iData);
if (sleep_time == 0)
continue;
rc = WaitForSingleObject(TIME_hWakeEvent, sleep_time);
rc = WaitForSingleObject(TIME_hWakeEvent, (sleep_time == -1) ? INFINITE : (DWORD)sleep_time);
if (rc != WAIT_TIMEOUT && rc != WAIT_OBJECT_0)
{
FIXME("Unexpected error %d(%d) in timer thread\n", rc, GetLastError());