wxutil.cpp
资源名称:p2p_vod.rar [点击查看]
上传用户:liguizhu
上传日期:2015-11-01
资源大小:2422k
文件大小:32k
源码类别:
P2P编程
开发平台:
Visual C++
- //------------------------------------------------------------------------------
- // File: WXUtil.cpp
- //
- // Desc: DirectShow base classes - implements helper classes for building
- // multimedia filters.
- //
- // Copyright (c) Microsoft Corporation. All rights reserved.
- //------------------------------------------------------------------------------
- #include <streams.h>
- //
- // Declare function from largeint.h we need so that PPC can build
- //
- //
- // Enlarged integer divide - 64-bits / 32-bits > 32-bits
- //
- #ifndef _X86_
- #define LLtoU64(x) (*(unsigned __int64*)(void*)(&(x)))
- __inline
- ULONG
- WINAPI
- EnlargedUnsignedDivide (
- IN ULARGE_INTEGER Dividend,
- IN ULONG Divisor,
- IN PULONG Remainder
- )
- {
- // return remainder if necessary
- if (Remainder != NULL)
- *Remainder = (ULONG)(LLtoU64(Dividend) % Divisor);
- return (ULONG)(LLtoU64(Dividend) / Divisor);
- }
- #else
- __inline
- ULONG
- WINAPI
- EnlargedUnsignedDivide (
- IN ULARGE_INTEGER Dividend,
- IN ULONG Divisor,
- IN PULONG Remainder
- )
- {
- ULONG ulResult;
- _asm {
- mov eax,Dividend.LowPart
- mov edx,Dividend.HighPart
- mov ecx,Remainder
- div Divisor
- or ecx,ecx
- jz short label
- mov [ecx],edx
- label:
- mov ulResult,eax
- }
- return ulResult;
- }
- #endif
- // --- CAMEvent -----------------------
- CAMEvent::CAMEvent(BOOL fManualReset)
- {
- m_hEvent = CreateEvent(NULL, fManualReset, FALSE, NULL);
- }
- CAMEvent::~CAMEvent()
- {
- if (m_hEvent) {
- EXECUTE_ASSERT(CloseHandle(m_hEvent));
- }
- }
- // --- CAMMsgEvent -----------------------
- // One routine. The rest is handled in CAMEvent
- BOOL CAMMsgEvent::WaitMsg(DWORD dwTimeout)
- {
- // wait for the event to be signalled, or for the
- // timeout (in MS) to expire. allow SENT messages
- // to be processed while we wait
- DWORD dwWait;
- DWORD dwStartTime;
- // set the waiting period.
- DWORD dwWaitTime = dwTimeout;
- // the timeout will eventually run down as we iterate
- // processing messages. grab the start time so that
- // we can calculate elapsed times.
- if (dwWaitTime != INFINITE) {
- dwStartTime = timeGetTime();
- }
- do {
- dwWait = MsgWaitForMultipleObjects(1,&m_hEvent,FALSE, dwWaitTime, QS_SENDMESSAGE);
- if (dwWait == WAIT_OBJECT_0 + 1) {
- MSG Message;
- PeekMessage(&Message,NULL,0,0,PM_NOREMOVE);
- // If we have an explicit length of time to wait calculate
- // the next wake up point - which might be now.
- // If dwTimeout is INFINITE, it stays INFINITE
- if (dwWaitTime != INFINITE) {
- DWORD dwElapsed = timeGetTime()-dwStartTime;
- dwWaitTime =
- (dwElapsed >= dwTimeout)
- ? 0 // wake up with WAIT_TIMEOUT
- : dwTimeout-dwElapsed;
- }
- }
- } while (dwWait == WAIT_OBJECT_0 + 1);
- // return TRUE if we woke on the event handle,
- // FALSE if we timed out.
- return (dwWait == WAIT_OBJECT_0);
- }
- // --- CAMThread ----------------------
- CAMThread::CAMThread()
- : m_EventSend(TRUE) // must be manual-reset for CheckRequest()
- {
- m_hThread = NULL;
- }
- CAMThread::~CAMThread() {
- Close();
- }
- // when the thread starts, it calls this function. We unwrap the 'this'
- //pointer and call ThreadProc.
- DWORD WINAPI
- CAMThread::InitialThreadProc(LPVOID pv)
- {
- HRESULT hrCoInit = CAMThread::CoInitializeHelper();
- if(FAILED(hrCoInit)) {
- DbgLog((LOG_ERROR, 1, TEXT("CoInitializeEx failed.")));
- }
- CAMThread * pThread = (CAMThread *) pv;
- HRESULT hr = pThread->ThreadProc();
- if(SUCCEEDED(hrCoInit)) {
- CoUninitialize();
- }
- return hr;
- }
- BOOL
- CAMThread::Create()
- {
- DWORD threadid;
- CAutoLock lock(&m_AccessLock);
- if (ThreadExists()) {
- return FALSE;
- }
- m_hThread = CreateThread(
- NULL,
- 0,
- CAMThread::InitialThreadProc,
- this,
- 0,
- &threadid);
- if (!m_hThread) {
- return FALSE;
- }
- return TRUE;
- }
- DWORD
- CAMThread::CallWorker(DWORD dwParam)
- {
- // lock access to the worker thread for scope of this object
- CAutoLock lock(&m_AccessLock);
- if (!ThreadExists()) {
- return (DWORD) E_FAIL;
- }
- // set the parameter
- m_dwParam = dwParam;
- // signal the worker thread
- m_EventSend.Set();
- // wait for the completion to be signalled
- m_EventComplete.Wait();
- // done - this is the thread's return value
- return m_dwReturnVal;
- }
- // Wait for a request from the client
- DWORD
- CAMThread::GetRequest()
- {
- m_EventSend.Wait();
- return m_dwParam;
- }
- // is there a request?
- BOOL
- CAMThread::CheckRequest(DWORD * pParam)
- {
- if (!m_EventSend.Check()) {
- return FALSE;
- } else {
- if (pParam) {
- *pParam = m_dwParam;
- }
- return TRUE;
- }
- }
- // reply to the request
- void
- CAMThread::Reply(DWORD dw)
- {
- m_dwReturnVal = dw;
- // The request is now complete so CheckRequest should fail from
- // now on
- //
- // This event should be reset BEFORE we signal the client or
- // the client may Set it before we reset it and we'll then
- // reset it (!)
- m_EventSend.Reset();
- // Tell the client we're finished
- m_EventComplete.Set();
- }
- HRESULT CAMThread::CoInitializeHelper()
- {
- // call CoInitializeEx and tell OLE not to create a window (this
- // thread probably won't dispatch messages and will hang on
- // broadcast msgs o/w).
- //
- // If CoInitEx is not available, threads that don't call CoCreate
- // aren't affected. Threads that do will have to handle the
- // failure. Perhaps we should fall back to CoInitialize and risk
- // hanging?
- //
- // older versions of ole32.dll don't have CoInitializeEx
- HRESULT hr = E_FAIL;
- HINSTANCE hOle = GetModuleHandle(TEXT("ole32.dll"));
- if(hOle)
- {
- typedef HRESULT (STDAPICALLTYPE *PCoInitializeEx)(
- LPVOID pvReserved, DWORD dwCoInit);
- PCoInitializeEx pCoInitializeEx =
- (PCoInitializeEx)(GetProcAddress(hOle, "CoInitializeEx"));
- if(pCoInitializeEx)
- {
- hr = (*pCoInitializeEx)(0, COINIT_DISABLE_OLE1DDE );
- }
- }
- else
- {
- // caller must load ole32.dll
- DbgBreak("couldn't locate ole32.dll");
- }
- return hr;
- }
- // destructor for CMsgThread - cleans up any messages left in the
- // queue when the thread exited
- CMsgThread::~CMsgThread()
- {
- if (m_hThread != NULL) {
- WaitForSingleObject(m_hThread, INFINITE);
- EXECUTE_ASSERT(CloseHandle(m_hThread));
- }
- POSITION pos = m_ThreadQueue.GetHeadPosition();
- while (pos) {
- CMsg * pMsg = m_ThreadQueue.GetNext(pos);
- delete pMsg;
- }
- m_ThreadQueue.RemoveAll();
- if (m_hSem != NULL) {
- EXECUTE_ASSERT(CloseHandle(m_hSem));
- }
- }
- BOOL
- CMsgThread::CreateThread(
- )
- {
- m_hSem = CreateSemaphore(NULL, 0, 0x7FFFFFFF, NULL);
- if (m_hSem == NULL) {
- return FALSE;
- }
- m_hThread = ::CreateThread(NULL, 0, DefaultThreadProc,
- (LPVOID)this, 0, &m_ThreadId);
- return m_hThread != NULL;
- }
- // This is the threads message pump. Here we get and dispatch messages to
- // clients thread proc until the client refuses to process a message.
- // The client returns a non-zero value to stop the message pump, this
- // value becomes the threads exit code.
- DWORD WINAPI
- CMsgThread::DefaultThreadProc(
- LPVOID lpParam
- )
- {
- CMsgThread *lpThis = (CMsgThread *)lpParam;
- CMsg msg;
- LRESULT lResult;
- // !!!
- CoInitialize(NULL);
- // allow a derived class to handle thread startup
- lpThis->OnThreadInit();
- do {
- lpThis->GetThreadMsg(&msg);
- lResult = lpThis->ThreadMessageProc(msg.uMsg,msg.dwFlags,
- msg.lpParam, msg.pEvent);
- } while (lResult == 0L);
- // !!!
- CoUninitialize();
- return (DWORD)lResult;
- }
- // Block until the next message is placed on the list m_ThreadQueue.
- // copies the message to the message pointed to by *pmsg
- void
- CMsgThread::GetThreadMsg(CMsg *msg)
- {
- CMsg * pmsg = NULL;
- // keep trying until a message appears
- while (TRUE) {
- {
- CAutoLock lck(&m_Lock);
- pmsg = m_ThreadQueue.RemoveHead();
- if (pmsg == NULL) {
- m_lWaiting++;
- } else {
- break;
- }
- }
- // the semaphore will be signalled when it is non-empty
- WaitForSingleObject(m_hSem, INFINITE);
- }
- // copy fields to caller's CMsg
- *msg = *pmsg;
- // this CMsg was allocated by the 'new' in PutThreadMsg
- delete pmsg;
- }
- // NOTE: as we need to use the same binaries on Win95 as on NT this code should
- // be compiled WITHOUT unicode being defined. Otherwise we will not pick up
- // these internal routines and the binary will not run on Win95.
- #ifndef UNICODE
- // Windows 95 doesn't implement this, so we provide an implementation.
- // LPWSTR
- // WINAPI
- // lstrcpyWInternal(
- // LPWSTR lpString1,
- // LPCWSTR lpString2
- // )
- // {
- // LPWSTR lpReturn = lpString1;
- // while (*lpString1++ = *lpString2++);
- //
- // return lpReturn;
- // }
- // Windows 95 doesn't implement this, so we provide an implementation.
- LPWSTR
- WINAPI
- lstrcpynWInternal(
- LPWSTR lpString1,
- LPCWSTR lpString2,
- int iMaxLength
- )
- {
- ASSERT(iMaxLength);
- LPWSTR lpReturn = lpString1;
- if (iMaxLength) {
- while (--iMaxLength && (*lpString1++ = *lpString2++));
- // If we ran out of room (which will be the case if
- // iMaxLength is now 0) we still need to terminate the
- // string.
- if (!iMaxLength) *lpString1 = L' ';
- }
- return lpReturn;
- }
- int
- WINAPI
- lstrcmpWInternal(
- LPCWSTR lpString1,
- LPCWSTR lpString2
- )
- {
- do {
- WCHAR c1 = *lpString1;
- WCHAR c2 = *lpString2;
- if (c1 != c2)
- return (int) c1 - (int) c2;
- } while (*lpString1++ && *lpString2++);
- return 0;
- }
- int
- WINAPI
- lstrcmpiWInternal(
- LPCWSTR lpString1,
- LPCWSTR lpString2
- )
- {
- do {
- WCHAR c1 = *lpString1;
- WCHAR c2 = *lpString2;
- if (c1 >= L'A' && c1 <= L'Z')
- c1 -= (WCHAR) (L'A' - L'a');
- if (c2 >= L'A' && c2 <= L'Z')
- c2 -= (WCHAR) (L'A' - L'a');
- if (c1 != c2)
- return (int) c1 - (int) c2;
- } while (*lpString1++ && *lpString2++);
- return 0;
- }
- int
- WINAPI
- lstrlenWInternal(
- LPCWSTR lpString
- )
- {
- int i = -1;
- while (*(lpString+(++i)))
- ;
- return i;
- }
- // int WINAPIV wsprintfWInternal(LPWSTR wszOut, LPCWSTR pszFmt, ...)
- // {
- // char fmt[256]; // !!!
- // char ach[256]; // !!!
- // int i;
- //
- // va_list va;
- // va_start(va, pszFmt);
- // WideCharToMultiByte(GetACP(), 0, pszFmt, -1, fmt, 256, NULL, NULL);
- // (void)StringCchVPrintf(ach, NUMELMS(ach), fmt, va);
- // i = lstrlenA(ach);
- // va_end(va);
- //
- // MultiByteToWideChar(CP_ACP, 0, ach, -1, wszOut, i+1);
- //
- // return i;
- // }
- #else
- // need to provide the implementations in unicode for non-unicode
- // builds linking with the unicode strmbase.lib
- //LPWSTR WINAPI lstrcpyWInternal(
- // LPWSTR lpString1,
- // LPCWSTR lpString2
- // )
- //{
- // return lstrcpyW(lpString1, lpString2);
- //}
- LPWSTR WINAPI lstrcpynWInternal(
- LPWSTR lpString1,
- LPCWSTR lpString2,
- int iMaxLength
- )
- {
- return lstrcpynW(lpString1, lpString2, iMaxLength);
- }
- int WINAPI lstrcmpWInternal(
- LPCWSTR lpString1,
- LPCWSTR lpString2
- )
- {
- return lstrcmpW(lpString1, lpString2);
- }
- int WINAPI lstrcmpiWInternal(
- LPCWSTR lpString1,
- LPCWSTR lpString2
- )
- {
- return lstrcmpiW(lpString1, lpString2);
- }
- int WINAPI lstrlenWInternal(
- LPCWSTR lpString
- )
- {
- return lstrlenW(lpString);
- }
- //int WINAPIV wsprintfWInternal(
- // LPWSTR wszOut, LPCWSTR pszFmt, ...)
- //{
- // va_list va;
- // va_start(va, pszFmt);
- // int i = wvsprintfW(wszOut, pszFmt, va);
- // va_end(va);
- // return i;
- //}
- #endif
- // Helper function - convert int to WSTR
- void WINAPI IntToWstr(int i, LPWSTR wstr, size_t len)
- {
- #ifdef UNICODE
- (void)StringCchPrintf(wstr, len, L"%d", i);
- #else
- TCHAR temp[32];
- (void)StringCchPrintf(temp, NUMELMS(temp), "%d", i);
- MultiByteToWideChar(CP_ACP, 0, temp, -1, wstr, int(len) );
- #endif
- } // IntToWstr
- #if 0
- void * memchrInternal(const void *pv, int c, size_t sz)
- {
- BYTE *pb = (BYTE *) pv;
- while (sz--) {
- if (*pb == c)
- return (void *) pb;
- pb++;
- }
- return NULL;
- }
- #endif
- #define MEMORY_ALIGNMENT 4
- #define MEMORY_ALIGNMENT_LOG2 2
- #define MEMORY_ALIGNMENT_MASK MEMORY_ALIGNMENT - 1
- void * __stdcall memmoveInternal(void * dst, const void * src, size_t count)
- {
- void * ret = dst;
- #ifdef _X86_
- if (dst <= src || (char *)dst >= ((char *)src + count)) {
- /*
- * Non-Overlapping Buffers
- * copy from lower addresses to higher addresses
- */
- _asm {
- mov esi,src
- mov edi,dst
- mov ecx,count
- cld
- mov edx,ecx
- and edx,MEMORY_ALIGNMENT_MASK
- shr ecx,MEMORY_ALIGNMENT_LOG2
- rep movsd
- or ecx,edx
- jz memmove_done
- rep movsb
- memmove_done:
- }
- }
- else {
- /*
- * Overlapping Buffers
- * copy from higher addresses to lower addresses
- */
- _asm {
- mov esi,src
- mov edi,dst
- mov ecx,count
- std
- add esi,ecx
- add edi,ecx
- dec esi
- dec edi
- rep movsb
- cld
- }
- }
- #else
- MoveMemory(dst, src, count);
- #endif
- return ret;
- }
- /* Arithmetic functions to help with time format conversions
- */
- #ifdef _M_ALPHA
- // work around bug in version 12.00.8385 of the alpha compiler where
- // UInt32x32To64 sign-extends its arguments (?)
- #undef UInt32x32To64
- #define UInt32x32To64(a, b) (((ULONGLONG)((ULONG)(a)) & 0xffffffff) * ((ULONGLONG)((ULONG)(b)) & 0xffffffff))
- #endif
- /* Compute (a * b + d) / c */
- LONGLONG WINAPI llMulDiv(LONGLONG a, LONGLONG b, LONGLONG c, LONGLONG d)
- {
- /* Compute the absolute values to avoid signed arithmetic problems */
- ULARGE_INTEGER ua, ub;
- DWORDLONG uc;
- ua.QuadPart = (DWORDLONG)(a >= 0 ? a : -a);
- ub.QuadPart = (DWORDLONG)(b >= 0 ? b : -b);
- uc = (DWORDLONG)(c >= 0 ? c : -c);
- BOOL bSign = (a < 0) ^ (b < 0);
- /* Do long multiplication */
- ULARGE_INTEGER p[2];
- p[0].QuadPart = UInt32x32To64(ua.LowPart, ub.LowPart);
- /* This next computation cannot overflow into p[1].HighPart because
- the max number we can compute here is:
- (2 ** 32 - 1) * (2 ** 32 - 1) + // ua.LowPart * ub.LowPart
- (2 ** 32) * (2 ** 31) * (2 ** 32 - 1) * 2 // x.LowPart * y.HighPart * 2
- == 2 ** 96 - 2 ** 64 + (2 ** 64 - 2 ** 33 + 1)
- == 2 ** 96 - 2 ** 33 + 1
- < 2 ** 96
- */
- ULARGE_INTEGER x;
- x.QuadPart = UInt32x32To64(ua.LowPart, ub.HighPart) +
- UInt32x32To64(ua.HighPart, ub.LowPart) +
- p[0].HighPart;
- p[0].HighPart = x.LowPart;
- p[1].QuadPart = UInt32x32To64(ua.HighPart, ub.HighPart) + x.HighPart;
- if (d != 0) {
- ULARGE_INTEGER ud[2];
- if (bSign) {
- ud[0].QuadPart = (DWORDLONG)(-d);
- if (d > 0) {
- /* -d < 0 */
- ud[1].QuadPart = (DWORDLONG)(LONGLONG)-1;
- } else {
- ud[1].QuadPart = (DWORDLONG)0;
- }
- } else {
- ud[0].QuadPart = (DWORDLONG)d;
- if (d < 0) {
- ud[1].QuadPart = (DWORDLONG)(LONGLONG)-1;
- } else {
- ud[1].QuadPart = (DWORDLONG)0;
- }
- }
- /* Now do extended addition */
- ULARGE_INTEGER uliTotal;
- /* Add ls DWORDs */
- uliTotal.QuadPart = (DWORDLONG)ud[0].LowPart + p[0].LowPart;
- p[0].LowPart = uliTotal.LowPart;
- /* Propagate carry */
- uliTotal.LowPart = uliTotal.HighPart;
- uliTotal.HighPart = 0;
- /* Add 2nd most ls DWORDs */
- uliTotal.QuadPart += (DWORDLONG)ud[0].HighPart + p[0].HighPart;
- p[0].HighPart = uliTotal.LowPart;
- /* Propagate carry */
- uliTotal.LowPart = uliTotal.HighPart;
- uliTotal.HighPart = 0;
- /* Add MS DWORDLONGs - no carry expected */
- p[1].QuadPart += ud[1].QuadPart + uliTotal.QuadPart;
- /* Now see if we got a sign change from the addition */
- if ((LONG)p[1].HighPart < 0) {
- bSign = !bSign;
- /* Negate the current value (ugh!) */
- p[0].QuadPart = ~p[0].QuadPart;
- p[1].QuadPart = ~p[1].QuadPart;
- p[0].QuadPart += 1;
- p[1].QuadPart += (p[0].QuadPart == 0);
- }
- }
- /* Now for the division */
- if (c < 0) {
- bSign = !bSign;
- }
- /* This will catch c == 0 and overflow */
- if (uc <= p[1].QuadPart) {
- return bSign ? (LONGLONG)0x8000000000000000 :
- (LONGLONG)0x7FFFFFFFFFFFFFFF;
- }
- DWORDLONG ullResult;
- /* Do the division */
- /* If the dividend is a DWORD_LONG use the compiler */
- if (p[1].QuadPart == 0) {
- ullResult = p[0].QuadPart / uc;
- return bSign ? -(LONGLONG)ullResult : (LONGLONG)ullResult;
- }
- /* If the divisor is a DWORD then its simpler */
- ULARGE_INTEGER ulic;
- ulic.QuadPart = uc;
- if (ulic.HighPart == 0) {
- ULARGE_INTEGER uliDividend;
- ULARGE_INTEGER uliResult;
- DWORD dwDivisor = (DWORD)uc;
- // ASSERT(p[1].HighPart == 0 && p[1].LowPart < dwDivisor);
- uliDividend.HighPart = p[1].LowPart;
- uliDividend.LowPart = p[0].HighPart;
- #ifndef USE_LARGEINT
- uliResult.HighPart = (DWORD)(uliDividend.QuadPart / dwDivisor);
- p[0].HighPart = (DWORD)(uliDividend.QuadPart % dwDivisor);
- uliResult.LowPart = 0;
- uliResult.QuadPart = p[0].QuadPart / dwDivisor + uliResult.QuadPart;
- #else
- /* NOTE - this routine will take exceptions if
- the result does not fit in a DWORD
- */
- if (uliDividend.QuadPart >= (DWORDLONG)dwDivisor) {
- uliResult.HighPart = EnlargedUnsignedDivide(
- uliDividend,
- dwDivisor,
- &p[0].HighPart);
- } else {
- uliResult.HighPart = 0;
- }
- uliResult.LowPart = EnlargedUnsignedDivide(
- p[0],
- dwDivisor,
- NULL);
- #endif
- return bSign ? -(LONGLONG)uliResult.QuadPart :
- (LONGLONG)uliResult.QuadPart;
- }
- ullResult = 0;
- /* OK - do long division */
- for (int i = 0; i < 64; i++) {
- ullResult <<= 1;
- /* Shift 128 bit p left 1 */
- p[1].QuadPart <<= 1;
- if ((p[0].HighPart & 0x80000000) != 0) {
- p[1].LowPart++;
- }
- p[0].QuadPart <<= 1;
- /* Compare */
- if (uc <= p[1].QuadPart) {
- p[1].QuadPart -= uc;
- ullResult += 1;
- }
- }
- return bSign ? - (LONGLONG)ullResult : (LONGLONG)ullResult;
- }
- LONGLONG WINAPI Int64x32Div32(LONGLONG a, LONG b, LONG c, LONG d)
- {
- ULARGE_INTEGER ua;
- DWORD ub;
- DWORD uc;
- /* Compute the absolute values to avoid signed arithmetic problems */
- ua.QuadPart = (DWORDLONG)(a >= 0 ? a : -a);
- ub = (DWORD)(b >= 0 ? b : -b);
- uc = (DWORD)(c >= 0 ? c : -c);
- BOOL bSign = (a < 0) ^ (b < 0);
- /* Do long multiplication */
- ULARGE_INTEGER p0;
- DWORD p1;
- p0.QuadPart = UInt32x32To64(ua.LowPart, ub);
- if (ua.HighPart != 0) {
- ULARGE_INTEGER x;
- x.QuadPart = UInt32x32To64(ua.HighPart, ub) + p0.HighPart;
- p0.HighPart = x.LowPart;
- p1 = x.HighPart;
- } else {
- p1 = 0;
- }
- if (d != 0) {
- ULARGE_INTEGER ud0;
- DWORD ud1;
- if (bSign) {
- //
- // Cast d to LONGLONG first otherwise -0x80000000 sign extends
- // incorrectly
- //
- ud0.QuadPart = (DWORDLONG)(-(LONGLONG)d);
- if (d > 0) {
- /* -d < 0 */
- ud1 = (DWORD)-1;
- } else {
- ud1 = (DWORD)0;
- }
- } else {
- ud0.QuadPart = (DWORDLONG)d;
- if (d < 0) {
- ud1 = (DWORD)-1;
- } else {
- ud1 = (DWORD)0;
- }
- }
- /* Now do extended addition */
- ULARGE_INTEGER uliTotal;
- /* Add ls DWORDs */
- uliTotal.QuadPart = (DWORDLONG)ud0.LowPart + p0.LowPart;
- p0.LowPart = uliTotal.LowPart;
- /* Propagate carry */
- uliTotal.LowPart = uliTotal.HighPart;
- uliTotal.HighPart = 0;
- /* Add 2nd most ls DWORDs */
- uliTotal.QuadPart += (DWORDLONG)ud0.HighPart + p0.HighPart;
- p0.HighPart = uliTotal.LowPart;
- /* Add MS DWORDLONGs - no carry expected */
- p1 += ud1 + uliTotal.HighPart;
- /* Now see if we got a sign change from the addition */
- if ((LONG)p1 < 0) {
- bSign = !bSign;
- /* Negate the current value (ugh!) */
- p0.QuadPart = ~p0.QuadPart;
- p1 = ~p1;
- p0.QuadPart += 1;
- p1 += (p0.QuadPart == 0);
- }
- }
- /* Now for the division */
- if (c < 0) {
- bSign = !bSign;
- }
- /* This will catch c == 0 and overflow */
- if (uc <= p1) {
- return bSign ? (LONGLONG)0x8000000000000000 :
- (LONGLONG)0x7FFFFFFFFFFFFFFF;
- }
- /* Do the division */
- /* If the divisor is a DWORD then its simpler */
- ULARGE_INTEGER uliDividend;
- ULARGE_INTEGER uliResult;
- DWORD dwDivisor = uc;
- uliDividend.HighPart = p1;
- uliDividend.LowPart = p0.HighPart;
- /* NOTE - this routine will take exceptions if
- the result does not fit in a DWORD
- */
- if (uliDividend.QuadPart >= (DWORDLONG)dwDivisor) {
- uliResult.HighPart = EnlargedUnsignedDivide(
- uliDividend,
- dwDivisor,
- &p0.HighPart);
- } else {
- uliResult.HighPart = 0;
- }
- uliResult.LowPart = EnlargedUnsignedDivide(
- p0,
- dwDivisor,
- NULL);
- return bSign ? -(LONGLONG)uliResult.QuadPart :
- (LONGLONG)uliResult.QuadPart;
- }
- #ifdef DEBUG
- /******************************Public*Routine******************************
- * Debug CCritSec helpers
- *
- * We provide debug versions of the Constructor, destructor, Lock and Unlock
- * routines. The debug code tracks who owns each critical section by
- * maintaining a depth count.
- *
- * History:
- *
- **************************************************************************/
- CCritSec::CCritSec()
- {
- InitializeCriticalSection(&m_CritSec);
- m_currentOwner = m_lockCount = 0;
- m_fTrace = FALSE;
- }
- CCritSec::~CCritSec()
- {
- DeleteCriticalSection(&m_CritSec);
- }
- void CCritSec::Lock()
- {
- UINT tracelevel=3;
- DWORD us = GetCurrentThreadId();
- DWORD currentOwner = m_currentOwner;
- if (currentOwner && (currentOwner != us)) {
- // already owned, but not by us
- if (m_fTrace) {
- DbgLog((LOG_LOCKING, 2, TEXT("Thread %d about to wait for lock %x owned by %d"),
- GetCurrentThreadId(), &m_CritSec, currentOwner));
- tracelevel=2;
- // if we saw the message about waiting for the critical
- // section we ensure we see the message when we get the
- // critical section
- }
- }
- EnterCriticalSection(&m_CritSec);
- if (0 == m_lockCount++) {
- // we now own it for the first time. Set owner information
- m_currentOwner = us;
- if (m_fTrace) {
- DbgLog((LOG_LOCKING, tracelevel, TEXT("Thread %d now owns lock %x"), m_currentOwner, &m_CritSec));
- }
- }
- }
- void CCritSec::Unlock() {
- if (0 == --m_lockCount) {
- // about to be unowned
- if (m_fTrace) {
- DbgLog((LOG_LOCKING, 3, TEXT("Thread %d releasing lock %x"), m_currentOwner, &m_CritSec));
- }
- m_currentOwner = 0;
- }
- LeaveCriticalSection(&m_CritSec);
- }
- void WINAPI DbgLockTrace(CCritSec * pcCrit, BOOL fTrace)
- {
- pcCrit->m_fTrace = fTrace;
- }
- BOOL WINAPI CritCheckIn(CCritSec * pcCrit)
- {
- return (GetCurrentThreadId() == pcCrit->m_currentOwner);
- }
- BOOL WINAPI CritCheckIn(const CCritSec * pcCrit)
- {
- return (GetCurrentThreadId() == pcCrit->m_currentOwner);
- }
- BOOL WINAPI CritCheckOut(CCritSec * pcCrit)
- {
- return (GetCurrentThreadId() != pcCrit->m_currentOwner);
- }
- BOOL WINAPI CritCheckOut(const CCritSec * pcCrit)
- {
- return (GetCurrentThreadId() != pcCrit->m_currentOwner);
- }
- #endif
- STDAPI WriteBSTR(BSTR *pstrDest, LPCWSTR szSrc)
- {
- *pstrDest = SysAllocString( szSrc );
- if( !(*pstrDest) ) return E_OUTOFMEMORY;
- return NOERROR;
- }
- STDAPI FreeBSTR(BSTR* pstr)
- {
- if( *pstr == NULL ) return S_FALSE;
- SysFreeString( *pstr );
- return NOERROR;
- }
- // Return a wide string - allocating memory for it
- // Returns:
- // S_OK - no error
- // E_POINTER - ppszReturn == NULL
- // E_OUTOFMEMORY - can't allocate memory for returned string
- STDAPI AMGetWideString(LPCWSTR psz, LPWSTR *ppszReturn)
- {
- CheckPointer(ppszReturn, E_POINTER);
- ValidateReadWritePtr(ppszReturn, sizeof(LPWSTR));
- DWORD nameLen = sizeof(WCHAR) * (lstrlenW(psz)+1);
- *ppszReturn = (LPWSTR)CoTaskMemAlloc(nameLen);
- if (*ppszReturn == NULL) {
- return E_OUTOFMEMORY;
- }
- CopyMemory(*ppszReturn, psz, nameLen);
- return NOERROR;
- }
- // Waits for the HANDLE hObject. While waiting messages sent
- // to windows on our thread by SendMessage will be processed.
- // Using this function to do waits and mutual exclusion
- // avoids some deadlocks in objects with windows.
- // Return codes are the same as for WaitForSingleObject
- DWORD WINAPI WaitDispatchingMessages(
- HANDLE hObject,
- DWORD dwWait,
- HWND hwnd,
- UINT uMsg,
- HANDLE hEvent)
- {
- BOOL bPeeked = FALSE;
- DWORD dwResult;
- DWORD dwStart;
- DWORD dwThreadPriority;
- static UINT uMsgId = 0;
- HANDLE hObjects[2] = { hObject, hEvent };
- if (dwWait != INFINITE && dwWait != 0) {
- dwStart = GetTickCount();
- }
- for (; ; ) {
- DWORD nCount = NULL != hEvent ? 2 : 1;
- // Minimize the chance of actually dispatching any messages
- // by seeing if we can lock immediately.
- dwResult = WaitForMultipleObjects(nCount, hObjects, FALSE, 0);
- if (dwResult < WAIT_OBJECT_0 + nCount) {
- break;
- }
- DWORD dwTimeOut = dwWait;
- if (dwTimeOut > 10) {
- dwTimeOut = 10;
- }
- dwResult = MsgWaitForMultipleObjects(
- nCount,
- hObjects,
- FALSE,
- dwTimeOut,
- hwnd == NULL ? QS_SENDMESSAGE :
- QS_SENDMESSAGE + QS_POSTMESSAGE);
- if (dwResult == WAIT_OBJECT_0 + nCount ||
- dwResult == WAIT_TIMEOUT && dwTimeOut != dwWait) {
- MSG msg;
- if (hwnd != NULL) {
- while (PeekMessage(&msg, hwnd, uMsg, uMsg, PM_REMOVE)) {
- DispatchMessage(&msg);
- }
- }
- // Do this anyway - the previous peek doesn't flush out the
- // messages
- PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE);
- if (dwWait != INFINITE && dwWait != 0) {
- DWORD dwNow = GetTickCount();
- // Working with differences handles wrap-around
- DWORD dwDiff = dwNow - dwStart;
- if (dwDiff > dwWait) {
- dwWait = 0;
- } else {
- dwWait -= dwDiff;
- }
- dwStart = dwNow;
- }
- if (!bPeeked) {
- // Raise our priority to prevent our message queue
- // building up
- dwThreadPriority = GetThreadPriority(GetCurrentThread());
- if (dwThreadPriority < THREAD_PRIORITY_HIGHEST) {
- SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST);
- }
- bPeeked = TRUE;
- }
- } else {
- break;
- }
- }
- if (bPeeked) {
- SetThreadPriority(GetCurrentThread(), dwThreadPriority);
- if (HIWORD(GetQueueStatus(QS_POSTMESSAGE)) & QS_POSTMESSAGE) {
- if (uMsgId == 0) {
- uMsgId = RegisterWindowMessage(TEXT("AMUnblock"));
- }
- if (uMsgId != 0) {
- MSG msg;
- // Remove old ones
- while (PeekMessage(&msg, (HWND)-1, uMsgId, uMsgId, PM_REMOVE)) {
- }
- }
- PostThreadMessage(GetCurrentThreadId(), uMsgId, 0, 0);
- }
- }
- return dwResult;
- }
- HRESULT AmGetLastErrorToHResult()
- {
- DWORD dwLastError = GetLastError();
- if(dwLastError != 0)
- {
- return HRESULT_FROM_WIN32(dwLastError);
- }
- else
- {
- return E_FAIL;
- }
- }
- IUnknown* QzAtlComPtrAssign(IUnknown** pp, IUnknown* lp)
- {
- if (lp != NULL)
- lp->AddRef();
- if (*pp)
- (*pp)->Release();
- *pp = lp;
- return lp;
- }
- /******************************************************************************
- CompatibleTimeSetEvent
- CompatibleTimeSetEvent() sets the TIME_KILL_SYNCHRONOUS flag before calling
- timeSetEvent() if the current operating system supports it. TIME_KILL_SYNCHRONOUS
- is supported on Windows XP and later operating systems.
- Parameters:
- - The same parameters as timeSetEvent(). See timeSetEvent()'s documentation in
- the Platform SDK for more information.
- Return Value:
- - The same return value as timeSetEvent(). See timeSetEvent()'s documentation in
- the Platform SDK for more information.
- ******************************************************************************/
- MMRESULT CompatibleTimeSetEvent( UINT uDelay, UINT uResolution, LPTIMECALLBACK lpTimeProc, DWORD_PTR dwUser, UINT fuEvent )
- {
- #if WINVER >= 0x0501
- {
- static bool fCheckedVersion = false;
- static bool fTimeKillSynchronousFlagAvailable = false;
- if( !fCheckedVersion ) {
- fTimeKillSynchronousFlagAvailable = TimeKillSynchronousFlagAvailable();
- fCheckedVersion = true;
- }
- if( fTimeKillSynchronousFlagAvailable ) {
- fuEvent = fuEvent | TIME_KILL_SYNCHRONOUS;
- }
- }
- #endif // WINVER >= 0x0501
- return timeSetEvent( uDelay, uResolution, lpTimeProc, dwUser, fuEvent );
- }
- bool TimeKillSynchronousFlagAvailable( void )
- {
- OSVERSIONINFO osverinfo;
- osverinfo.dwOSVersionInfoSize = sizeof(osverinfo);
- if( GetVersionEx( &osverinfo ) ) {
- // Windows XP's major version is 5 and its' minor version is 1.
- // timeSetEvent() started supporting the TIME_KILL_SYNCHRONOUS flag
- // in Windows XP.
- if( (osverinfo.dwMajorVersion > 5) ||
- ( (osverinfo.dwMajorVersion == 5) && (osverinfo.dwMinorVersion >= 1) ) ) {
- return true;
- }
- }
- return false;
- }