2 * Implementation of IReferenceClock
4 * Copyright 2004 Raphael Junqueira
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 #include "quartz_private.h"
23 #include "wine/debug.h"
24 #include "wine/unicode.h"
27 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
29 typedef struct SystemClockAdviseEntry SystemClockAdviseEntry;
30 struct SystemClockAdviseEntry {
31 SystemClockAdviseEntry* next;
32 SystemClockAdviseEntry* prev;
35 REFERENCE_TIME rtBaseTime;
36 REFERENCE_TIME rtIntervalTime;
39 typedef struct SystemClockImpl {
40 IReferenceClock IReferenceClock_iface;
43 /** IReferenceClock */
46 BOOL adviseThreadActive;
47 REFERENCE_TIME lastRefTime;
48 DWORD lastTimeTickCount;
49 CRITICAL_SECTION safe;
51 SystemClockAdviseEntry* pSingleShotAdvise;
52 SystemClockAdviseEntry* pPeriodicAdvise;
55 static inline SystemClockImpl *impl_from_IReferenceClock(IReferenceClock *iface)
57 return CONTAINING_RECORD(iface, SystemClockImpl, IReferenceClock_iface);
61 static void QUARTZ_RemoveAviseEntryFromQueue(SystemClockImpl* This, SystemClockAdviseEntry* pEntry) {
62 if (pEntry->prev) pEntry->prev->next = pEntry->next;
63 if (pEntry->next) pEntry->next->prev = pEntry->prev;
64 if (This->pSingleShotAdvise == pEntry) This->pSingleShotAdvise = pEntry->next;
65 if (This->pPeriodicAdvise == pEntry) This->pPeriodicAdvise = pEntry->next;
68 static void QUARTZ_InsertAviseEntryFromQueue(SystemClockImpl* This, SystemClockAdviseEntry* pEntry, SystemClockAdviseEntry** pQueue) {
69 SystemClockAdviseEntry* prev_it = NULL;
70 SystemClockAdviseEntry* it = NULL;
71 REFERENCE_TIME bornTime = pEntry->rtBaseTime + pEntry->rtIntervalTime;
73 for (it = *pQueue; NULL != it && (it->rtBaseTime + it->rtIntervalTime) < bornTime; it = it->next) {
76 if (NULL == prev_it) {
78 if (NULL != (*pQueue)) pEntry->next = (*pQueue)->next;
79 /*assert( NULL == pEntry->next->prev );*/
80 if (NULL != pEntry->next) pEntry->next->prev = pEntry;
83 pEntry->prev = prev_it;
84 pEntry->next = prev_it->next;
85 prev_it->next = pEntry;
86 if (NULL != pEntry->next) pEntry->next->prev = pEntry;
90 #define MAX_REFTIME (REFERENCE_TIME)(0x7FFFFFFFFFFFFFFF)
91 #define ADVISE_EXIT (WM_APP + 0)
92 #define ADVISE_REMOVE (WM_APP + 2)
93 #define ADVISE_ADD_SINGLESHOT (WM_APP + 4)
94 #define ADVISE_ADD_PERIODIC (WM_APP + 8)
96 static DWORD WINAPI SystemClockAdviseThread(LPVOID lpParam) {
97 SystemClockImpl* This = lpParam;
98 DWORD timeOut = INFINITE;
102 REFERENCE_TIME curTime;
103 SystemClockAdviseEntry* it = NULL;
105 TRACE("(%p): Main Loop\n", This);
108 if (timeOut > 0) MsgWaitForMultipleObjects(0, NULL, FALSE, timeOut, QS_POSTMESSAGE|QS_SENDMESSAGE|QS_TIMER);
110 EnterCriticalSection(&This->safe);
111 /*timeOut = IReferenceClock_OnTimerUpdated(This); */
112 hr = IReferenceClock_GetTime(&This->IReferenceClock_iface, &curTime);
118 /** First SingleShots Advice: sorted list */
119 for (it = This->pSingleShotAdvise; NULL != it && (it->rtBaseTime + it->rtIntervalTime) <= curTime; it = it->next) {
120 /** send event ... */
121 SetEvent(it->hEvent);
122 /** ... and Release it */
123 QUARTZ_RemoveAviseEntryFromQueue(This, it);
126 if (NULL != it) timeOut = (DWORD) ((it->rtBaseTime + it->rtIntervalTime) - curTime) / (REFERENCE_TIME)10000;
128 /** Now Periodics Advice: semi sorted list (sort cannot be used) */
129 for (it = This->pPeriodicAdvise; NULL != it; it = it->next) {
130 if (it->rtBaseTime <= curTime) {
131 DWORD nPeriods = (DWORD) ((curTime - it->rtBaseTime) / it->rtIntervalTime);
132 /** Release the semaphore ... */
133 ReleaseSemaphore(it->hEvent, nPeriods, NULL);
134 /** ... and refresh time */
135 it->rtBaseTime += nPeriods * it->rtIntervalTime;
136 /*assert( it->rtBaseTime + it->rtIntervalTime < curTime );*/
138 tmpTimeOut = (DWORD) ((it->rtBaseTime + it->rtIntervalTime) - curTime) / (REFERENCE_TIME)10000;
139 if (timeOut > tmpTimeOut) timeOut = tmpTimeOut;
143 LeaveCriticalSection(&This->safe);
145 while (PeekMessageW(&msg, NULL, 0, 0, PM_REMOVE)) {
146 /** if hwnd we suppose that is a windows event ... */
147 if (NULL != msg.hwnd) {
148 TranslateMessage(&msg);
149 DispatchMessageW(&msg);
151 switch (msg.message) {
155 case ADVISE_ADD_SINGLESHOT:
156 case ADVISE_ADD_PERIODIC:
157 /** set timeout to 0 to do a rescan now */
161 /** hmmmm what we can do here ... */
165 ERR("Unhandled message %u. Critical Path\n", msg.message);
173 TRACE("(%p): Exiting\n", This);
176 /*static DWORD WINAPI SystemClockAdviseThread(LPVOID lpParam) { */
178 static BOOL SystemClockPostMessageToAdviseThread(SystemClockImpl* This, UINT iMsg) {
179 if (FALSE == This->adviseThreadActive) {
181 This->adviseThread = CreateThread(NULL, 0, SystemClockAdviseThread, This, 0, &This->adviseThreadId);
182 if (NULL == This->adviseThread) return FALSE;
183 SetThreadPriority(This->adviseThread, THREAD_PRIORITY_TIME_CRITICAL);
184 This->adviseThreadActive = TRUE;
186 res = PostThreadMessageW(This->adviseThreadId, iMsg, 0, 0);
187 /* Let the thread creates its message queue (with MsgWaitForMultipleObjects call) by yielding and retrying */
188 if (!res && (GetLastError() == ERROR_INVALID_THREAD_ID))
195 return PostThreadMessageW(This->adviseThreadId, iMsg, 0, 0);
198 static ULONG WINAPI SystemClockImpl_AddRef(IReferenceClock* iface) {
199 SystemClockImpl *This = impl_from_IReferenceClock(iface);
200 ULONG ref = InterlockedIncrement(&This->ref);
202 TRACE("(%p): AddRef from %d\n", This, ref - 1);
207 static HRESULT WINAPI SystemClockImpl_QueryInterface(IReferenceClock* iface, REFIID riid, void** ppobj) {
208 SystemClockImpl *This = impl_from_IReferenceClock(iface);
209 TRACE("(%p, %s,%p)\n", This, debugstr_guid(riid), ppobj);
211 if (IsEqualIID (riid, &IID_IUnknown) ||
212 IsEqualIID (riid, &IID_IReferenceClock)) {
213 SystemClockImpl_AddRef(iface);
219 WARN("(%p, %s,%p): not found\n", This, debugstr_guid(riid), ppobj);
220 return E_NOINTERFACE;
223 static ULONG WINAPI SystemClockImpl_Release(IReferenceClock* iface) {
224 SystemClockImpl *This = impl_from_IReferenceClock(iface);
225 ULONG ref = InterlockedDecrement(&This->ref);
226 TRACE("(%p): ReleaseRef to %d\n", This, ref);
228 if (SystemClockPostMessageToAdviseThread(This, ADVISE_EXIT)) {
229 WaitForSingleObject(This->adviseThread, INFINITE);
230 CloseHandle(This->adviseThread);
232 This->safe.DebugInfo->Spare[0] = 0;
233 DeleteCriticalSection(&This->safe);
239 static HRESULT WINAPI SystemClockImpl_GetTime(IReferenceClock* iface, REFERENCE_TIME* pTime) {
240 SystemClockImpl *This = impl_from_IReferenceClock(iface);
241 DWORD curTimeTickCount;
244 TRACE("(%p, %p)\n", This, pTime);
250 curTimeTickCount = GetTickCount();
252 EnterCriticalSection(&This->safe);
253 if (This->lastTimeTickCount == curTimeTickCount) hr = S_FALSE;
254 This->lastRefTime += (REFERENCE_TIME) (DWORD) (curTimeTickCount - This->lastTimeTickCount) * (REFERENCE_TIME) 10000;
255 This->lastTimeTickCount = curTimeTickCount;
256 *pTime = This->lastRefTime;
257 LeaveCriticalSection(&This->safe);
261 static HRESULT WINAPI SystemClockImpl_AdviseTime(IReferenceClock* iface, REFERENCE_TIME rtBaseTime, REFERENCE_TIME rtStreamTime, HEVENT hEvent, DWORD_PTR* pdwAdviseCookie) {
262 SystemClockImpl *This = impl_from_IReferenceClock(iface);
263 SystemClockAdviseEntry* pEntry = NULL;
265 TRACE("(%p, 0x%s, 0x%s, %ld, %p)\n", This, wine_dbgstr_longlong(rtBaseTime),
266 wine_dbgstr_longlong(rtStreamTime), hEvent, pdwAdviseCookie);
271 if (0 >= rtBaseTime + rtStreamTime) {
274 if (NULL == pdwAdviseCookie) {
277 pEntry = CoTaskMemAlloc(sizeof(SystemClockAdviseEntry));
278 if (NULL == pEntry) {
279 return E_OUTOFMEMORY;
281 ZeroMemory(pEntry, sizeof(SystemClockAdviseEntry));
283 pEntry->hEvent = (HANDLE) hEvent;
284 pEntry->rtBaseTime = rtBaseTime + rtStreamTime;
285 pEntry->rtIntervalTime = 0;
287 EnterCriticalSection(&This->safe);
288 QUARTZ_InsertAviseEntryFromQueue(This, pEntry, &This->pSingleShotAdvise);
289 LeaveCriticalSection(&This->safe);
291 SystemClockPostMessageToAdviseThread(This, ADVISE_ADD_SINGLESHOT);
293 *pdwAdviseCookie = (DWORD_PTR) (pEntry);
297 static HRESULT WINAPI SystemClockImpl_AdvisePeriodic(IReferenceClock* iface, REFERENCE_TIME rtStartTime, REFERENCE_TIME rtPeriodTime, HSEMAPHORE hSemaphore, DWORD_PTR* pdwAdviseCookie) {
298 SystemClockImpl *This = impl_from_IReferenceClock(iface);
299 SystemClockAdviseEntry* pEntry = NULL;
301 TRACE("(%p, 0x%s, 0x%s, %ld, %p)\n", This, wine_dbgstr_longlong(rtStartTime),
302 wine_dbgstr_longlong(rtPeriodTime), hSemaphore, pdwAdviseCookie);
307 if (0 >= rtStartTime || 0 >= rtPeriodTime) {
310 if (NULL == pdwAdviseCookie) {
313 pEntry = CoTaskMemAlloc(sizeof(SystemClockAdviseEntry));
314 if (NULL == pEntry) {
315 return E_OUTOFMEMORY;
317 ZeroMemory(pEntry, sizeof(SystemClockAdviseEntry));
319 pEntry->hEvent = (HANDLE) hSemaphore;
320 pEntry->rtBaseTime = rtStartTime;
321 pEntry->rtIntervalTime = rtPeriodTime;
323 EnterCriticalSection(&This->safe);
324 QUARTZ_InsertAviseEntryFromQueue(This, pEntry, &This->pPeriodicAdvise);
325 LeaveCriticalSection(&This->safe);
327 SystemClockPostMessageToAdviseThread(This, ADVISE_ADD_PERIODIC);
329 *pdwAdviseCookie = (DWORD_PTR) (pEntry);
333 static HRESULT WINAPI SystemClockImpl_Unadvise(IReferenceClock* iface, DWORD_PTR dwAdviseCookie) {
334 SystemClockImpl *This = impl_from_IReferenceClock(iface);
335 SystemClockAdviseEntry* pEntry = NULL;
336 SystemClockAdviseEntry* it = NULL;
338 TRACE("(%p, %lu)\n", This, dwAdviseCookie);
340 pEntry = (SystemClockAdviseEntry*) dwAdviseCookie;
342 EnterCriticalSection(&This->safe);
343 for (it = This->pPeriodicAdvise; NULL != it && it != pEntry; it = it->next) ;
345 for (it = This->pSingleShotAdvise; NULL != it && it != pEntry; it = it->next) ;
352 QUARTZ_RemoveAviseEntryFromQueue(This, pEntry);
353 CoTaskMemFree(pEntry);
355 SystemClockPostMessageToAdviseThread(This, ADVISE_REMOVE);
358 LeaveCriticalSection(&This->safe);
362 static const IReferenceClockVtbl SystemClock_Vtbl =
364 SystemClockImpl_QueryInterface,
365 SystemClockImpl_AddRef,
366 SystemClockImpl_Release,
367 SystemClockImpl_GetTime,
368 SystemClockImpl_AdviseTime,
369 SystemClockImpl_AdvisePeriodic,
370 SystemClockImpl_Unadvise
373 HRESULT QUARTZ_CreateSystemClock(IUnknown * pUnkOuter, LPVOID * ppv) {
374 SystemClockImpl* obj = NULL;
376 TRACE("(%p,%p)\n", ppv, pUnkOuter);
378 obj = CoTaskMemAlloc(sizeof(SystemClockImpl));
381 return E_OUTOFMEMORY;
383 ZeroMemory(obj, sizeof(SystemClockImpl));
385 obj->IReferenceClock_iface.lpVtbl = &SystemClock_Vtbl;
386 obj->ref = 0; /* will be inited by QueryInterface */
388 obj->lastTimeTickCount = GetTickCount();
389 InitializeCriticalSection(&obj->safe);
390 obj->safe.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": SystemClockImpl.safe");
392 return SystemClockImpl_QueryInterface(&obj->IReferenceClock_iface, &IID_IReferenceClock, ppv);