Sweden-Number/dlls/winmm/time.c

360 lines
10 KiB
C

/* -*- tab-width: 8; c-basic-offset: 4 -*- */
/*
* MMSYSTEM time functions
*
* Copyright 1993 Martin Ayotte
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include <time.h>
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "mmsystem.h"
#include "windef.h"
#include "winbase.h"
#include "winemm.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(mmtime);
/*
* FIXME
* We're using "1" as the mininum resolution to the timer,
* as Windows 95 does, according to the docs. Maybe it should
* depend on the computers resources!
*/
#define MMSYSTIME_MININTERVAL (1)
#define MMSYSTIME_MAXINTERVAL (65535)
#define MMSYSTIME_STDINTERVAL (10) /* reasonable value? */
static void TIME_TriggerCallBack(LPWINE_TIMERENTRY lpTimer)
{
TRACE("before CallBack => lpFunc=%p wTimerID=%04X dwUser=%08lX !\n",
lpTimer->lpFunc, lpTimer->wTimerID, lpTimer->dwUser);
/* - TimeProc callback that is called here is something strange, under Windows 3.1x it is called
* during interrupt time, is allowed to execute very limited number of API calls (like
* PostMessage), and must reside in DLL (therefore uses stack of active application). So I
* guess current implementation via SetTimer has to be improved upon.
*/
switch (lpTimer->wFlags & 0x30) {
case TIME_CALLBACK_FUNCTION:
if (lpTimer->wFlags & WINE_TIMER_IS32)
((LPTIMECALLBACK)lpTimer->lpFunc)(lpTimer->wTimerID, 0, lpTimer->dwUser, 0, 0);
else if (pFnCallMMDrvFunc16)
pFnCallMMDrvFunc16(lpTimer->lpFunc, lpTimer->wTimerID, 0,
lpTimer->dwUser, 0, 0);
break;
case TIME_CALLBACK_EVENT_SET:
SetEvent((HANDLE)lpTimer->lpFunc);
break;
case TIME_CALLBACK_EVENT_PULSE:
PulseEvent((HANDLE)lpTimer->lpFunc);
break;
default:
FIXME("Unknown callback type 0x%04x for mmtime callback (%p), ignored.\n",
lpTimer->wFlags, lpTimer->lpFunc);
break;
}
TRACE("after CallBack !\n");
}
/**************************************************************************
* TIME_MMSysTimeCallback
*/
static void CALLBACK TIME_MMSysTimeCallback(LPWINE_MM_IDATA iData)
{
LPWINE_TIMERENTRY lpTimer, lpNextTimer;
DWORD delta = GetTickCount() - iData->mmSysTimeMS;
int idx;
TRACE("Time delta: %ld\n", delta);
while (delta >= MMSYSTIME_MININTERVAL) {
delta -= MMSYSTIME_MININTERVAL;
iData->mmSysTimeMS += MMSYSTIME_MININTERVAL;
/* since timeSetEvent() and timeKillEvent() can be called
* from 16 bit code, there are cases where win16 lock is
* locked upon entering timeSetEvent(), and then the mm timer
* critical section is locked. This function cannot call the
* timer callback with the crit sect locked (because callback
* may need to acquire Win16 lock, thus providing a deadlock
* situation).
* To cope with that, we just copy the WINE_TIMERENTRY struct
* that need to trigger the callback, and call it without the
* mm timer crit sect locked. The bad side of this
* implementation is that, in some cases, the callback may be
* invoked *after* a timer has been destroyed...
* EPP 99/07/13
*/
idx = 0;
EnterCriticalSection(&iData->cs);
for (lpTimer = iData->lpTimerList; lpTimer != NULL; ) {
lpNextTimer = lpTimer->lpNext;
if (lpTimer->uCurTime < MMSYSTIME_MININTERVAL) {
/* since lpTimer->wDelay is >= MININTERVAL, wCurTime value
* shall be correct (>= 0)
*/
lpTimer->uCurTime += lpTimer->wDelay - MMSYSTIME_MININTERVAL;
if (lpTimer->lpFunc) {
if (idx == iData->nSizeLpTimers) {
iData->lpTimers = (LPWINE_TIMERENTRY)
HeapReAlloc(GetProcessHeap(), 0,
iData->lpTimers,
++iData->nSizeLpTimers * sizeof(WINE_TIMERENTRY));
}
iData->lpTimers[idx++] = *lpTimer;
}
/* TIME_ONESHOT is defined as 0 */
if (!(lpTimer->wFlags & TIME_PERIODIC))
timeKillEvent(lpTimer->wTimerID);
} else {
lpTimer->uCurTime -= MMSYSTIME_MININTERVAL;
}
lpTimer = lpNextTimer;
}
LeaveCriticalSection(&iData->cs);
while (idx > 0) {
TIME_TriggerCallBack(&iData->lpTimers[--idx]);
}
}
}
/**************************************************************************
* TIME_MMSysTimeThread
*/
static DWORD CALLBACK TIME_MMSysTimeThread(LPVOID arg)
{
LPWINE_MM_IDATA iData = (LPWINE_MM_IDATA)arg;
volatile HANDLE *pActive = (volatile HANDLE *)&iData->hMMTimer;
DWORD last_time, cur_time;
usleep(MMSYSTIME_STDINTERVAL * 1000);
last_time = GetTickCount();
while (*pActive) {
TIME_MMSysTimeCallback(iData);
cur_time = GetTickCount();
while (last_time < cur_time)
last_time += MMSYSTIME_STDINTERVAL;
usleep((last_time - cur_time) * 1000);
}
return 0;
}
/**************************************************************************
* TIME_MMTimeStart
*/
void TIME_MMTimeStart(void)
{
/* one could think it's possible to stop the service thread activity when no more
* mm timers are active, but this would require to keep mmSysTimeMS up-to-date
* without being incremented within the service thread callback.
*/
if (!WINMM_IData->hMMTimer) {
WINMM_IData->mmSysTimeMS = GetTickCount();
WINMM_IData->lpTimerList = NULL;
WINMM_IData->hMMTimer = CreateThread(NULL, 0, TIME_MMSysTimeThread, WINMM_IData, 0, NULL);
}
}
/**************************************************************************
* TIME_MMTimeStop
*/
void TIME_MMTimeStop(void)
{
if (WINMM_IData->hMMTimer) {
HANDLE hMMTimer = WINMM_IData->hMMTimer;
WINMM_IData->hMMTimer = 0;
WaitForSingleObject(hMMTimer, INFINITE);
CloseHandle(hMMTimer);
}
}
/**************************************************************************
* timeGetSystemTime [WINMM.@]
*/
MMRESULT WINAPI timeGetSystemTime(LPMMTIME lpTime, UINT wSize)
{
TRACE("(%p, %u);\n", lpTime, wSize);
if (wSize >= sizeof(*lpTime)) {
TIME_MMTimeStart();
lpTime->wType = TIME_MS;
lpTime->u.ms = WINMM_IData->mmSysTimeMS;
TRACE("=> %lu\n", lpTime->u.ms);
}
return 0;
}
/**************************************************************************
* TIME_SetEventInternal [internal]
*/
WORD TIME_SetEventInternal(UINT wDelay, UINT wResol,
FARPROC16 lpFunc, DWORD dwUser, UINT wFlags)
{
WORD wNewID = 0;
LPWINE_TIMERENTRY lpNewTimer;
LPWINE_TIMERENTRY lpTimer;
TRACE("(%u, %u, %p, %08lX, %04X);\n", wDelay, wResol, lpFunc, dwUser, wFlags);
lpNewTimer = (LPWINE_TIMERENTRY)HeapAlloc(GetProcessHeap(), 0, sizeof(WINE_TIMERENTRY));
if (lpNewTimer == NULL)
return 0;
if (wDelay < MMSYSTIME_MININTERVAL || wDelay > MMSYSTIME_MAXINTERVAL)
return 0;
TIME_MMTimeStart();
lpNewTimer->uCurTime = wDelay;
lpNewTimer->wDelay = wDelay;
lpNewTimer->wResol = wResol;
lpNewTimer->lpFunc = lpFunc;
lpNewTimer->dwUser = dwUser;
lpNewTimer->wFlags = wFlags;
EnterCriticalSection(&WINMM_IData->cs);
for (lpTimer = WINMM_IData->lpTimerList; lpTimer != NULL; lpTimer = lpTimer->lpNext) {
wNewID = max(wNewID, lpTimer->wTimerID);
}
lpNewTimer->lpNext = WINMM_IData->lpTimerList;
WINMM_IData->lpTimerList = lpNewTimer;
lpNewTimer->wTimerID = wNewID + 1;
LeaveCriticalSection(&WINMM_IData->cs);
TRACE("=> %u\n", wNewID + 1);
return wNewID + 1;
}
/**************************************************************************
* timeSetEvent [WINMM.@]
*/
MMRESULT WINAPI timeSetEvent(UINT wDelay, UINT wResol, LPTIMECALLBACK lpFunc,
DWORD dwUser, UINT wFlags)
{
if (wFlags & WINE_TIMER_IS32)
WARN("Unknown windows flag... wine internally used.. ooch\n");
return TIME_SetEventInternal(wDelay, wResol, (FARPROC16)lpFunc,
dwUser, wFlags|WINE_TIMER_IS32);
}
/**************************************************************************
* timeKillEvent [WINMM.@]
*/
MMRESULT WINAPI timeKillEvent(UINT wID)
{
LPWINE_TIMERENTRY* lpTimer;
MMRESULT ret = MMSYSERR_INVALPARAM;
TRACE("(%u)\n", wID);
EnterCriticalSection(&WINMM_IData->cs);
/* remove WINE_TIMERENTRY from list */
for (lpTimer = &WINMM_IData->lpTimerList; *lpTimer; lpTimer = &(*lpTimer)->lpNext) {
if (wID == (*lpTimer)->wTimerID) {
break;
}
}
LeaveCriticalSection(&WINMM_IData->cs);
if (*lpTimer) {
LPWINE_TIMERENTRY lpTemp = *lpTimer;
/* unlink timer of id 'wID' */
*lpTimer = (*lpTimer)->lpNext;
HeapFree(GetProcessHeap(), 0, lpTemp);
ret = TIMERR_NOERROR;
} else {
WARN("wID=%u is not a valid timer ID\n", wID);
}
return ret;
}
/**************************************************************************
* timeGetDevCaps [WINMM.@]
*/
MMRESULT WINAPI timeGetDevCaps(LPTIMECAPS lpCaps, UINT wSize)
{
TRACE("(%p, %u) !\n", lpCaps, wSize);
lpCaps->wPeriodMin = MMSYSTIME_MININTERVAL;
lpCaps->wPeriodMax = MMSYSTIME_MAXINTERVAL;
return 0;
}
/**************************************************************************
* timeBeginPeriod [WINMM.@]
*/
MMRESULT WINAPI timeBeginPeriod(UINT wPeriod)
{
TRACE("(%u) !\n", wPeriod);
if (wPeriod < MMSYSTIME_MININTERVAL || wPeriod > MMSYSTIME_MAXINTERVAL)
return TIMERR_NOCANDO;
return 0;
}
/**************************************************************************
* timeEndPeriod [WINMM.@]
*/
MMRESULT WINAPI timeEndPeriod(UINT wPeriod)
{
TRACE("(%u) !\n", wPeriod);
if (wPeriod < MMSYSTIME_MININTERVAL || wPeriod > MMSYSTIME_MAXINTERVAL)
return TIMERR_NOCANDO;
return 0;
}
/**************************************************************************
* timeGetTime [MMSYSTEM.607]
* timeGetTime [WINMM.@]
*/
DWORD WINAPI timeGetTime(void)
{
/* FIXME: releasing the win16 lock here is a temporary hack (I hope)
* that lets mciavi.drv run correctly
*/
DWORD count;
ReleaseThunkLock(&count);
RestoreThunkLock(count);
TIME_MMTimeStart();
return WINMM_IData->mmSysTimeMS;
}