dlls/quartz/systemclock.c

   1 /*
   2  * Implementation of IReferenceClock
   3  *
   4  * Copyright 2004 Raphael Junqueira
   5  *
   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.
  10  *
  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.
  15  *
  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
  19  */
  20
  21 #include "quartz_private.h"
  22
  23 #include "wine/debug.h"
  24 #include "wine/unicode.h"
  25 #include <assert.h>
  26
  27 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
  28
  29 typedef struct SystemClockAdviseEntry SystemClockAdviseEntry;
  30 struct SystemClockAdviseEntry {
  31   SystemClockAdviseEntry* next;
  32   SystemClockAdviseEntry* prev;
  33
  34   HANDLE           hEvent;
  35   REFERENCE_TIME   rtBaseTime;
  36   REFERENCE_TIME   rtIntervalTime;
  37 };
  38
  39 typedef struct SystemClockImpl {
  40   const IReferenceClockVtbl *lpVtbl;
  41   LONG ref;
  42
  43   /** IReferenceClock */
  44   HANDLE         adviseThread;
  45   DWORD          adviseThreadId;
  46   BOOL           adviseThreadActive;
  47   REFERENCE_TIME lastRefTime;
  48   DWORD          lastTimeTickCount;
  49   CRITICAL_SECTION safe;
  50
  51   SystemClockAdviseEntry* pSingleShotAdvise;
  52   SystemClockAdviseEntry* pPeriodicAdvise;
  53 } SystemClockImpl;
  54
  55
  56 static void QUARTZ_RemoveAviseEntryFromQueue(SystemClockImpl* This, SystemClockAdviseEntry* pEntry) {
  57   if (pEntry->prev) pEntry->prev->next = pEntry->next;
  58   if (pEntry->next) pEntry->next->prev = pEntry->prev;
  59   if (This->pSingleShotAdvise == pEntry) This->pSingleShotAdvise = pEntry->next;
  60   if (This->pPeriodicAdvise == pEntry)    This->pPeriodicAdvise = pEntry->next;
  61 }
  62
  63 static void QUARTZ_InsertAviseEntryFromQueue(SystemClockImpl* This, SystemClockAdviseEntry* pEntry, SystemClockAdviseEntry** pQueue) {
  64   SystemClockAdviseEntry* prev_it = NULL;
  65   SystemClockAdviseEntry* it = NULL;
  66   REFERENCE_TIME bornTime =  pEntry->rtBaseTime + pEntry->rtIntervalTime;
  67
  68   for (it = *pQueue; NULL != it && (it->rtBaseTime + it->rtIntervalTime) < bornTime; it = it->next) {
  69     prev_it = it;
  70   }
  71   if (NULL == prev_it) {
  72     pEntry->prev = NULL;
  73     if (NULL != (*pQueue)) pEntry->next = (*pQueue)->next;
  74     /*assert( NULL == pEntry->next->prev );*/
  75     if (NULL != pEntry->next) pEntry->next->prev = pEntry;
  76     (*pQueue) = pEntry;
  77   } else {
  78     pEntry->prev = prev_it;
  79     pEntry->next = prev_it->next;
  80     prev_it->next = pEntry;
  81     if (NULL != pEntry->next) pEntry->next->prev = pEntry;
  82   }
  83 }
  84
  85 #define MAX_REFTIME            (REFERENCE_TIME)(0x7FFFFFFFFFFFFFFF)
  86 #define ADVISE_EXIT            (WM_APP + 0)
  87 #define ADVISE_REMOVE          (WM_APP + 2)
  88 #define ADVISE_ADD_SINGLESHOT  (WM_APP + 4)
  89 #define ADVISE_ADD_PERIODIC    (WM_APP + 8)
  90
  91 static DWORD WINAPI SystemClockAdviseThread(LPVOID lpParam) {
  92   SystemClockImpl* This = (SystemClockImpl*) lpParam;
  93   DWORD timeOut = INFINITE;
  94   DWORD tmpTimeOut;
  95   MSG msg;
  96   HRESULT hr;
  97   REFERENCE_TIME curTime;
  98   SystemClockAdviseEntry* it = NULL;
  99
 100   TRACE("(%p): Main Loop\n", This);
 101
 102   while (TRUE) {
 103     if (timeOut > 0) MsgWaitForMultipleObjects(0, NULL, FALSE, timeOut, QS_POSTMESSAGE|QS_SENDMESSAGE|QS_TIMER);
 104
 105     EnterCriticalSection(&This->safe);
 106     /*timeOut = IReferenceClock_OnTimerUpdated(This); */
 107     hr = IReferenceClock_GetTime((IReferenceClock*) This, &curTime);
 108     if (FAILED(hr)) {
 109       timeOut = INFINITE;
 110       goto outrefresh;
 111     }
 112
 113     /** First SingleShots Advice: sorted list */
 114     for (it = This->pSingleShotAdvise; NULL != it && (it->rtBaseTime + it->rtIntervalTime) <= curTime; it = it->next) {
 115       /** send event ... */
 116       SetEvent(it->hEvent);
 117       /** ... and Release it */
 118       QUARTZ_RemoveAviseEntryFromQueue(This, it);
 119       CoTaskMemFree(it);
 120     }
 121     if (NULL != it) timeOut = (DWORD) ((it->rtBaseTime + it->rtIntervalTime) - curTime) / (REFERENCE_TIME)10000;
 122
 123     /** Now Periodics Advice: semi sorted list (sort cannot be used) */
 124     for (it = This->pPeriodicAdvise; NULL != it; it = it->next) {
 125       if (it->rtBaseTime <= curTime) {
 126         DWORD nPeriods = (DWORD) ((curTime - it->rtBaseTime) / it->rtIntervalTime);
 127         /** Release the semaphore ... */
 128         ReleaseSemaphore(it->hEvent, nPeriods, NULL);
 129         /** ... and refresh time */
 130         it->rtBaseTime += nPeriods * it->rtIntervalTime;
 131         /*assert( it->rtBaseTime + it->rtIntervalTime < curTime );*/
 132       }
 133       tmpTimeOut = (DWORD) ((it->rtBaseTime + it->rtIntervalTime) - curTime) / (REFERENCE_TIME)10000;
 134       if (timeOut > tmpTimeOut) timeOut = tmpTimeOut;
 135     }
 136
 137 outrefresh:
 138     LeaveCriticalSection(&This->safe);
 139
 140     while (PeekMessageA(&msg, NULL, 0, 0, PM_REMOVE)) {
 141       /** if hwnd we suppose that is a windows event ... */
 142       if  (NULL != msg.hwnd) {
 143         TranslateMessage(&msg);
 144         DispatchMessageA(&msg);
 145       } else {
 146         switch (msg.message) {
 147         case WM_QUIT:
 148         case ADVISE_EXIT:
 149           goto outofthread;
 150         case ADVISE_ADD_SINGLESHOT:
 151         case ADVISE_ADD_PERIODIC:
 152           /** set timeout to 0 to do a rescan now */
 153           timeOut = 0;
 154           break;
 155         case ADVISE_REMOVE:
 156           /** hmmmm what we can do here ... */
 157           timeOut = INFINITE;
 158           break;
 159         default:
 160           ERR("Unhandled message %u. Critical Path\n", msg.message);
 161           break;
 162         }
 163       }
 164     }
 165   }
 166
 167 outofthread:
 168   TRACE("(%p): Exiting\n", This);
 169   return 0;
 170 }
 171 /*static DWORD WINAPI SystemClockAdviseThread(LPVOID lpParam) { */
 172
 173 static BOOL SystemClockPostMessageToAdviseThread(SystemClockImpl* This, UINT iMsg) {
 174   if (FALSE == This->adviseThreadActive) {
 175     BOOL res;
 176     This->adviseThread = CreateThread(NULL, 0, SystemClockAdviseThread, This, 0, &This->adviseThreadId);
 177     if (NULL == This->adviseThread) return FALSE;
 178     SetThreadPriority(This->adviseThread, THREAD_PRIORITY_TIME_CRITICAL);
 179     This->adviseThreadActive = TRUE;
 180     while(1) {
 181       res = PostThreadMessageA(This->adviseThreadId, iMsg, 0, 0);
 182       /* Let the thread creates its message queue (with MsgWaitForMultipleObjects call) by yielding and retrying */
 183       if (!res && (GetLastError() == ERROR_INVALID_THREAD_ID))
 184         Sleep(0);
 185       else
 186         break;
 187     }
 188     return res;
 189   }
 190   return PostThreadMessageA(This->adviseThreadId, iMsg, 0, 0);
 191 }
 192
 193 static ULONG WINAPI SystemClockImpl_AddRef(IReferenceClock* iface) {
 194   SystemClockImpl *This = (SystemClockImpl *)iface;
 195   ULONG ref = InterlockedIncrement(&This->ref);
 196
 197   TRACE("(%p): AddRef from %d\n", This, ref - 1);
 198
 199   return ref;
 200 }
 201
 202 static HRESULT WINAPI SystemClockImpl_QueryInterface(IReferenceClock* iface, REFIID riid, void** ppobj) {
 203   SystemClockImpl *This = (SystemClockImpl *)iface;
 204   TRACE("(%p, %s,%p)\n", This, debugstr_guid(riid), ppobj);
 205
 206   if (IsEqualIID (riid, &IID_IUnknown) ||
 207       IsEqualIID (riid, &IID_IReferenceClock)) {
 208     SystemClockImpl_AddRef(iface);
 209     *ppobj = This;
 210     return S_OK;
 211   }
 212
 213   *ppobj = NULL;
 214   WARN("(%p, %s,%p): not found\n", This, debugstr_guid(riid), ppobj);
 215   return E_NOINTERFACE;
 216 }
 217
 218 static ULONG WINAPI SystemClockImpl_Release(IReferenceClock* iface) {
 219   SystemClockImpl *This = (SystemClockImpl *)iface;
 220   ULONG ref = InterlockedDecrement(&This->ref);
 221   TRACE("(%p): ReleaseRef to %d\n", This, ref);
 222   if (ref == 0) {
 223     if (SystemClockPostMessageToAdviseThread(This, ADVISE_EXIT)) {
 224       WaitForSingleObject(This->adviseThread, INFINITE);
 225       CloseHandle(This->adviseThread);
 226     }
 227     This->safe.DebugInfo->Spare[0] = 0;
 228     DeleteCriticalSection(&This->safe);
 229     CoTaskMemFree(This);
 230   }
 231   return ref;
 232 }
 233
 234 static HRESULT WINAPI SystemClockImpl_GetTime(IReferenceClock* iface, REFERENCE_TIME* pTime) {
 235   SystemClockImpl *This = (SystemClockImpl *)iface;
 236   DWORD curTimeTickCount;
 237   HRESULT hr = S_OK;
 238
 239   TRACE("(%p, %p)\n", This, pTime);
 240
 241   if (NULL == pTime) {
 242     return E_POINTER;
 243   }
 244
 245   curTimeTickCount = GetTickCount();
 246
 247   EnterCriticalSection(&This->safe);
 248   if (This->lastTimeTickCount == curTimeTickCount) hr = S_FALSE;
 249   This->lastRefTime += (REFERENCE_TIME) (DWORD) (curTimeTickCount - This->lastTimeTickCount) * (REFERENCE_TIME) 10000;
 250   This->lastTimeTickCount = curTimeTickCount;
 251   *pTime = This->lastRefTime;
 252   LeaveCriticalSection(&This->safe);
 253   return hr;
 254 }
 255
 256 static HRESULT WINAPI SystemClockImpl_AdviseTime(IReferenceClock* iface, REFERENCE_TIME rtBaseTime, REFERENCE_TIME rtStreamTime, HEVENT hEvent, DWORD_PTR* pdwAdviseCookie) {
 257   SystemClockImpl *This = (SystemClockImpl *)iface;
 258   SystemClockAdviseEntry* pEntry = NULL;
 259
 260   TRACE("(%p, 0x%s, 0x%s, %ld, %p)\n", This, wine_dbgstr_longlong(rtBaseTime),
 261       wine_dbgstr_longlong(rtStreamTime), hEvent, pdwAdviseCookie);
 262
 263   if ((HEVENT) 0 == hEvent) {
 264     return E_INVALIDARG;
 265   }
 266   if (0 >= rtBaseTime + rtStreamTime) {
 267     return E_INVALIDARG;
 268   }
 269   if (NULL == pdwAdviseCookie) {
 270     return E_POINTER;
 271   }
 272   pEntry = CoTaskMemAlloc(sizeof(SystemClockAdviseEntry));
 273   if (NULL == pEntry) {
 274     return E_OUTOFMEMORY;
 275   }
 276   ZeroMemory(pEntry, sizeof(SystemClockAdviseEntry));
 277
 278   pEntry->hEvent = (HANDLE) hEvent;
 279   pEntry->rtBaseTime = rtBaseTime + rtStreamTime;
 280   pEntry->rtIntervalTime = 0;
 281
 282   EnterCriticalSection(&This->safe);
 283   QUARTZ_InsertAviseEntryFromQueue(This, pEntry, &This->pSingleShotAdvise);
 284   LeaveCriticalSection(&This->safe);
 285
 286   SystemClockPostMessageToAdviseThread(This, ADVISE_ADD_SINGLESHOT);
 287
 288   *pdwAdviseCookie = (DWORD_PTR) (pEntry);
 289   return S_OK;
 290 }
 291
 292 static HRESULT WINAPI SystemClockImpl_AdvisePeriodic(IReferenceClock* iface, REFERENCE_TIME rtStartTime, REFERENCE_TIME rtPeriodTime, HSEMAPHORE hSemaphore, DWORD_PTR* pdwAdviseCookie) {
 293   SystemClockImpl *This = (SystemClockImpl *)iface;
 294   SystemClockAdviseEntry* pEntry = NULL;
 295
 296   TRACE("(%p, 0x%s, 0x%s, %ld, %p)\n", This, wine_dbgstr_longlong(rtStartTime),
 297       wine_dbgstr_longlong(rtPeriodTime), hSemaphore, pdwAdviseCookie);
 298
 299   if ((HSEMAPHORE) 0 == hSemaphore) {
 300     return E_INVALIDARG;
 301   }
 302   if (0 >= rtStartTime || 0 >= rtPeriodTime) {
 303     return E_INVALIDARG;
 304   }
 305   if (NULL == pdwAdviseCookie) {
 306     return E_POINTER;
 307   }
 308   pEntry = CoTaskMemAlloc(sizeof(SystemClockAdviseEntry));
 309   if (NULL == pEntry) {
 310     return E_OUTOFMEMORY;
 311   }
 312   ZeroMemory(pEntry, sizeof(SystemClockAdviseEntry));
 313
 314   pEntry->hEvent = (HANDLE) hSemaphore;
 315   pEntry->rtBaseTime = rtStartTime;
 316   pEntry->rtIntervalTime = rtPeriodTime;
 317
 318   EnterCriticalSection(&This->safe);
 319   QUARTZ_InsertAviseEntryFromQueue(This, pEntry, &This->pPeriodicAdvise);
 320   LeaveCriticalSection(&This->safe);
 321
 322   SystemClockPostMessageToAdviseThread(This, ADVISE_ADD_PERIODIC);
 323
 324   *pdwAdviseCookie = (DWORD_PTR) (pEntry);
 325   return S_OK;
 326 }
 327
 328 static HRESULT WINAPI SystemClockImpl_Unadvise(IReferenceClock* iface, DWORD_PTR dwAdviseCookie) {
 329   SystemClockImpl *This = (SystemClockImpl *)iface;
 330   SystemClockAdviseEntry* pEntry = NULL;
 331   SystemClockAdviseEntry* it = NULL;
 332   HRESULT ret = S_OK;
 333   TRACE("(%p, %lu)\n", This, dwAdviseCookie);
 334
 335   pEntry = (SystemClockAdviseEntry*) dwAdviseCookie;
 336
 337   EnterCriticalSection(&This->safe);
 338   for (it = This->pPeriodicAdvise; NULL != it && it != pEntry; it = it->next) ;
 339   if (it != pEntry) {
 340     for (it = This->pSingleShotAdvise; NULL != it && it != pEntry; it = it->next) ;
 341     if (it != pEntry) {
 342       ret = S_FALSE;
 343       goto out;
 344     }
 345   }
 346
 347   QUARTZ_RemoveAviseEntryFromQueue(This, pEntry);
 348   CoTaskMemFree(pEntry);
 349
 350   SystemClockPostMessageToAdviseThread(This, ADVISE_REMOVE);
 351
 352 out:
 353   LeaveCriticalSection(&This->safe);
 354   return ret;
 355 }
 356
 357 static const IReferenceClockVtbl SystemClock_Vtbl =
 358 {
 359     SystemClockImpl_QueryInterface,
 360     SystemClockImpl_AddRef,
 361     SystemClockImpl_Release,
 362     SystemClockImpl_GetTime,
 363     SystemClockImpl_AdviseTime,
 364     SystemClockImpl_AdvisePeriodic,
 365     SystemClockImpl_Unadvise
 366 };
 367
 368 HRESULT QUARTZ_CreateSystemClock(IUnknown * pUnkOuter, LPVOID * ppv) {
 369   SystemClockImpl* obj = NULL;
 370
 371   TRACE("(%p,%p)\n", ppv, pUnkOuter);
 372
 373   obj = CoTaskMemAlloc(sizeof(SystemClockImpl));
 374   if (NULL == obj)      {
 375     *ppv = NULL;
 376     return E_OUTOFMEMORY;
 377   }
 378   ZeroMemory(obj, sizeof(SystemClockImpl));
 379
 380   obj->lpVtbl = &SystemClock_Vtbl;
 381   obj->ref = 0;  /* will be inited by QueryInterface */
 382
 383   obj->lastTimeTickCount = GetTickCount();
 384   InitializeCriticalSection(&obj->safe);
 385   obj->safe.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": SystemClockImpl.safe");
 386
 387   return SystemClockImpl_QueryInterface((IReferenceClock*) obj, &IID_IReferenceClock, ppv);
 388 }