You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
569 lines
14 KiB
569 lines
14 KiB
/*++
|
|
|
|
Copyright (c) 1998 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
tpswait.h
|
|
|
|
Abstract:
|
|
|
|
Wait classes. Moved out of tpsclass.h
|
|
|
|
Contents:
|
|
CWait
|
|
CWaitRequest
|
|
CWaitAddRequest
|
|
CWaitRemoveRequest
|
|
CWaitThreadInfo
|
|
|
|
Author:
|
|
|
|
Richard L Firth (rfirth) 08-Aug-1998
|
|
|
|
Revision History:
|
|
|
|
08-Aug-1998 rfirth
|
|
Created
|
|
|
|
--*/
|
|
|
|
//
|
|
// forward declarations
|
|
//
|
|
|
|
class CWaitThreadInfo;
|
|
|
|
//
|
|
// classes
|
|
//
|
|
|
|
//
|
|
// CWait
|
|
//
|
|
|
|
class CWait : public CTimedListEntry {
|
|
|
|
private:
|
|
|
|
HANDLE m_hObject;
|
|
WAITORTIMERCALLBACKFUNC m_pCallback;
|
|
LPVOID m_pContext;
|
|
CWaitThreadInfo * m_pThreadInfo;
|
|
DWORD m_dwFlags;
|
|
|
|
public:
|
|
|
|
CWait(HANDLE hObject,
|
|
WAITORTIMERCALLBACKFUNC pCallback,
|
|
LPVOID pContext,
|
|
DWORD dwWaitTime,
|
|
DWORD dwFlags,
|
|
CWaitThreadInfo * pInfo
|
|
) : CTimedListEntry(dwWaitTime) {
|
|
m_hObject = hObject;
|
|
m_pCallback = pCallback;
|
|
m_pContext = pContext;
|
|
m_pThreadInfo = pInfo;
|
|
m_dwFlags = dwFlags;
|
|
}
|
|
|
|
CWait() {
|
|
}
|
|
|
|
CWait * Next(VOID) {
|
|
return (CWait *)CTimedListEntry::Next();
|
|
}
|
|
|
|
CWaitThreadInfo * GetThreadInfo(VOID) const {
|
|
return m_pThreadInfo;
|
|
}
|
|
|
|
VOID Execute(BOOL bTimeout) {
|
|
|
|
//
|
|
// execute function in this thread if required to do so, else we run
|
|
// the callback in a non-I/O worker thread
|
|
//
|
|
|
|
//
|
|
// APPCOMPAT - can't do this: the callback types for Wait & Work requests
|
|
// are different: one takes 2 parameters, the other one. We
|
|
// can't make this change until this issue is resolved with
|
|
// NT guys
|
|
//
|
|
|
|
//if (m_dwFlags & WT_EXECUTEINWAITTHREAD) {
|
|
m_pCallback(m_pContext, bTimeout != 0);
|
|
//} else {
|
|
//
|
|
// //
|
|
// // would have to allocate object from heap to hold callback
|
|
// // function, context & bTimeout parameters in order to pass
|
|
// // them to worker thread (we only have access to one APC
|
|
// // parameter and we'd have to nominate different APC)
|
|
// //
|
|
//
|
|
// Ie_QueueUserWorkItem((LPTHREAD_START_ROUTINE)m_pCallback,
|
|
// m_pContext,
|
|
// FALSE
|
|
// );
|
|
//}
|
|
}
|
|
|
|
HANDLE GetHandle(VOID) const {
|
|
return m_hObject;
|
|
}
|
|
|
|
BOOL IsNoRemoveItem(VOID) {
|
|
return (m_dwFlags & SRWSO_NOREMOVE) ? TRUE : FALSE;
|
|
}
|
|
};
|
|
|
|
//
|
|
// CWaitRequest
|
|
//
|
|
|
|
class CWaitRequest {
|
|
|
|
private:
|
|
|
|
BOOL m_bCompleted;
|
|
CWait * m_pWait;
|
|
|
|
public:
|
|
|
|
CWaitRequest() {
|
|
m_bCompleted = FALSE;
|
|
}
|
|
|
|
CWaitRequest(CWait * pWait) {
|
|
m_bCompleted = FALSE;
|
|
m_pWait = pWait;
|
|
}
|
|
|
|
VOID SetComplete(VOID) {
|
|
m_bCompleted = TRUE;
|
|
}
|
|
|
|
VOID WaitForCompletion(VOID) {
|
|
while (!m_bCompleted) {
|
|
SleepEx(0, TRUE);
|
|
}
|
|
}
|
|
|
|
VOID SetWaitPointer(CWait * pWait) {
|
|
m_pWait = pWait;
|
|
}
|
|
|
|
CWait * GetWaitPointer(VOID) const {
|
|
return m_pWait;
|
|
}
|
|
};
|
|
|
|
//
|
|
// CWaitAddRequest
|
|
//
|
|
|
|
class CWaitAddRequest : public CWait, public CWaitRequest {
|
|
|
|
public:
|
|
|
|
CWaitAddRequest(HANDLE hObject,
|
|
WAITORTIMERCALLBACKFUNC pCallback,
|
|
LPVOID pContext,
|
|
DWORD dwWaitTime,
|
|
DWORD dwFlags,
|
|
CWaitThreadInfo * pInfo
|
|
) :
|
|
CWait(hObject, pCallback, pContext, dwWaitTime, dwFlags, pInfo),
|
|
CWaitRequest()
|
|
{
|
|
}
|
|
};
|
|
|
|
//
|
|
// CWaitRemoveRequest
|
|
//
|
|
|
|
class CWaitRemoveRequest : public CWaitRequest {
|
|
|
|
public:
|
|
|
|
CWaitRemoveRequest(HANDLE hWait) : CWaitRequest((CWait *)hWait) {
|
|
}
|
|
};
|
|
|
|
//
|
|
// CWaitThreadInfo
|
|
//
|
|
|
|
class CWaitThreadInfo : public CDoubleLinkedList, public CCriticalSection {
|
|
|
|
private:
|
|
|
|
HANDLE m_hThread;
|
|
DWORD m_dwObjectCount;
|
|
HANDLE m_Objects[MAXIMUM_WAIT_OBJECTS];
|
|
CWait * m_pWaiters[MAXIMUM_WAIT_OBJECTS];
|
|
CWait m_Waiters[MAXIMUM_WAIT_OBJECTS];
|
|
CDoubleLinkedList m_FreeList;
|
|
CDoubleLinkedList m_WaitList;
|
|
|
|
public:
|
|
|
|
CWaitThreadInfo(CDoubleLinkedList * pList) {
|
|
CDoubleLinkedList::Init();
|
|
m_hThread = NULL;
|
|
m_dwObjectCount = 0;
|
|
m_FreeList.Init();
|
|
m_WaitList.Init();
|
|
for (int i = 0; i < ARRAY_ELEMENTS(m_Waiters); ++i) {
|
|
m_Waiters[i].InsertTail(&m_FreeList);
|
|
}
|
|
InsertHead(pList);
|
|
}
|
|
|
|
VOID SetHandle(HANDLE hThread) {
|
|
m_hThread = hThread;
|
|
}
|
|
|
|
HANDLE GetHandle(VOID) const {
|
|
return m_hThread;
|
|
}
|
|
|
|
DWORD GetObjectCount(VOID) const {
|
|
return m_dwObjectCount;
|
|
}
|
|
|
|
BOOL IsAvailableEntry(VOID) const {
|
|
return m_dwObjectCount < ARRAY_ELEMENTS(m_Objects);
|
|
}
|
|
|
|
BOOL IsInvalidHandle(DWORD dwIndex) {
|
|
|
|
ASSERT(dwIndex < m_dwObjectCount);
|
|
|
|
//
|
|
// GetHandleInformation() doesn't exist on Win95
|
|
//
|
|
//
|
|
//DWORD dwHandleFlags;
|
|
//
|
|
//return !GetHandleInformation(m_Objects[dwIndex], &dwHandleFlags);
|
|
|
|
DWORD status = WaitForSingleObject(m_Objects[dwIndex], 0);
|
|
|
|
if ((status == WAIT_FAILED) && (GetLastError() == ERROR_INVALID_HANDLE)) {
|
|
//#if DBG
|
|
//char buf[128];
|
|
//wsprintf(buf, "IsInvalidHandle(%d): handle %#x is invalid\n", dwIndex, m_Objects[dwIndex]);
|
|
//OutputDebugString(buf);
|
|
//#endif
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
VOID Compress(DWORD dwIndex, DWORD dwCount = 1)
|
|
{
|
|
ASSERT(dwCount != 0);
|
|
ASSERT((int)m_dwObjectCount > 0);
|
|
ASSERT(m_dwObjectCount < MAXIMUM_WAIT_OBJECTS);
|
|
|
|
if (((dwIndex + dwCount) < m_dwObjectCount) && (m_dwObjectCount < MAXIMUM_WAIT_OBJECTS))
|
|
{
|
|
RtlMoveMemory(&m_Objects[dwIndex],
|
|
&m_Objects[dwIndex + dwCount],
|
|
sizeof(m_Objects[0]) * (m_dwObjectCount - (dwIndex + dwCount))
|
|
);
|
|
RtlMoveMemory(&m_pWaiters[dwIndex],
|
|
&m_pWaiters[dwIndex + dwCount],
|
|
sizeof(m_pWaiters[0]) * (m_dwObjectCount - (dwIndex + dwCount))
|
|
);
|
|
}
|
|
m_dwObjectCount -= dwCount;
|
|
}
|
|
|
|
VOID Expand(DWORD dwIndex)
|
|
{
|
|
ASSERT((int)m_dwObjectCount > 0);
|
|
// The off by one is because we copying from dwIndex + 1 and our size to copy is
|
|
// m_dwObjectCount - dwIndex
|
|
if (m_dwObjectCount < MAXIMUM_WAIT_OBJECTS - 1)
|
|
{
|
|
RtlMoveMemory(&m_Objects[dwIndex],
|
|
&m_Objects[dwIndex + 1],
|
|
sizeof(m_Objects[0]) * (m_dwObjectCount - dwIndex)
|
|
);
|
|
RtlMoveMemory(&m_pWaiters[dwIndex],
|
|
&m_pWaiters[dwIndex + 1],
|
|
sizeof(m_pWaiters[0]) * (m_dwObjectCount - dwIndex)
|
|
);
|
|
++m_dwObjectCount;
|
|
}
|
|
|
|
ASSERT(m_dwObjectCount <= ARRAY_ELEMENTS(m_Objects));
|
|
}
|
|
|
|
//DWORD BuildList(VOID) {
|
|
//
|
|
// //
|
|
// // PERF: only rebuild from changed index
|
|
// //
|
|
//
|
|
// m_dwObjectCount = 0;
|
|
// for (CWait * pWait = (CWait *)m_WaitList.Next();
|
|
// pWait = pWait->Next();
|
|
// !m_WaitList.IsHead(pWait)) {
|
|
// m_pWaiters[m_dwObjectCount] = pWait;
|
|
// m_Objects[m_dwObjectCount] = pWait->GetHandle();
|
|
// ++m_dwObjectCount;
|
|
// }
|
|
// return GetWaitTime();
|
|
//}
|
|
|
|
DWORD Wait(DWORD dwTimeout = INFINITE) {
|
|
|
|
//
|
|
// if no objects in list, sleep alertably for the timeout period
|
|
//
|
|
|
|
if (m_dwObjectCount == 0) {
|
|
SleepEx(dwTimeout, TRUE);
|
|
return WAIT_IO_COMPLETION;
|
|
}
|
|
|
|
//
|
|
// else wait alertably for the timeout period
|
|
//
|
|
|
|
ASSERT(m_dwObjectCount <= ARRAY_ELEMENTS(m_Objects));
|
|
|
|
return WaitForMultipleObjectsEx(m_dwObjectCount,
|
|
m_Objects,
|
|
FALSE, // fWaitAll
|
|
dwTimeout,
|
|
TRUE // fAlertable
|
|
);
|
|
}
|
|
|
|
DWORD GetWaitTime(VOID) {
|
|
|
|
ASSERT(m_dwObjectCount <= ARRAY_ELEMENTS(m_Objects));
|
|
|
|
if (m_dwObjectCount != 0) {
|
|
|
|
CWait * pWaiter = m_pWaiters[0];
|
|
DWORD dwWaitTime = pWaiter->GetWaitTime();
|
|
|
|
if (dwWaitTime != INFINITE) {
|
|
|
|
DWORD dwTimeNow = GetTickCount();
|
|
DWORD dwTimeStamp = pWaiter->GetTimeStamp();
|
|
|
|
if (dwTimeNow > dwTimeStamp + dwWaitTime) {
|
|
|
|
//
|
|
// first object expired already
|
|
//
|
|
|
|
return 0;
|
|
}
|
|
|
|
//
|
|
// number of milliseconds until next waiter expires
|
|
//
|
|
|
|
return (dwTimeStamp + dwWaitTime) - dwTimeNow;
|
|
}
|
|
}
|
|
|
|
//
|
|
// nothing in list
|
|
//
|
|
|
|
return INFINITE;
|
|
}
|
|
|
|
CWait * GetFreeWaiter(VOID) {
|
|
return (CWait *)m_FreeList.RemoveHead();
|
|
}
|
|
|
|
VOID InsertWaiter(CWait * pWait) {
|
|
|
|
DWORD dwIndex = 0;
|
|
BOOL bAtEnd = TRUE;
|
|
CDoubleLinkedListEntry * pHead = m_WaitList.Head();
|
|
|
|
ASSERT(m_dwObjectCount <= ARRAY_ELEMENTS(m_Objects));
|
|
|
|
if ((m_dwObjectCount != 0) && !pWait->IsInfiniteTimeout()) {
|
|
|
|
//
|
|
// not infinite timeout. Find place in list to insert this object
|
|
//
|
|
|
|
//
|
|
// PERF: typically, new wait will be longer than most currently in
|
|
// list, so should start from end of non-infinite timeouts
|
|
// and work backwards
|
|
//
|
|
|
|
for (; dwIndex < m_dwObjectCount; ++dwIndex) {
|
|
if (pWait->ExpiryTime() < m_pWaiters[dwIndex]->ExpiryTime()) {
|
|
pHead = m_pWaiters[dwIndex]->Head();
|
|
bAtEnd = (dwIndex == (m_dwObjectCount - 1));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// insert the new wait object at the correct location
|
|
//
|
|
|
|
pWait->InsertTail(pHead);
|
|
if (!bAtEnd && (m_dwObjectCount != 0)) {
|
|
Expand(dwIndex);
|
|
} else {
|
|
dwIndex = m_dwObjectCount;
|
|
++m_dwObjectCount;
|
|
}
|
|
|
|
//
|
|
// update object list and pointer list
|
|
//
|
|
|
|
m_Objects[dwIndex] = pWait->GetHandle();
|
|
m_pWaiters[dwIndex] = pWait;
|
|
}
|
|
|
|
VOID RemoveWaiter(CWait * pWait, DWORD dwIndex) {
|
|
|
|
//
|
|
// remove the waiter from the wait list and add it back to the
|
|
// free list
|
|
//
|
|
|
|
pWait->Remove();
|
|
pWait->InsertTail(&m_FreeList);
|
|
|
|
//
|
|
// if the object was not at the end of the list then compress
|
|
// the list
|
|
//
|
|
|
|
if (dwIndex != (m_dwObjectCount - 1)) {
|
|
Compress(dwIndex, 1);
|
|
} else {
|
|
--m_dwObjectCount;
|
|
}
|
|
}
|
|
|
|
VOID RemoveWaiter(DWORD dwIndex) {
|
|
|
|
ASSERT(m_dwObjectCount <= ARRAY_ELEMENTS(m_Objects));
|
|
|
|
RemoveWaiter(m_pWaiters[dwIndex], dwIndex);
|
|
}
|
|
|
|
BOOL RemoveWaiter(CWait * pWait) {
|
|
|
|
ASSERT(m_dwObjectCount <= ARRAY_ELEMENTS(m_Objects));
|
|
|
|
for (DWORD dwIndex = 0; dwIndex < m_dwObjectCount; ++dwIndex) {
|
|
if (m_pWaiters[dwIndex] == pWait) {
|
|
RemoveWaiter(pWait, dwIndex);
|
|
return TRUE;
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
VOID ProcessTimeouts(VOID) {
|
|
|
|
DWORD dwTimeNow = GetTickCount();
|
|
DWORD dwCount = 0;
|
|
|
|
ASSERT(m_dwObjectCount <= ARRAY_ELEMENTS(m_Objects));
|
|
|
|
while (dwCount < m_dwObjectCount) {
|
|
|
|
CWait * pWait = m_pWaiters[dwCount];
|
|
|
|
//
|
|
// if waiter has expired, invoke its callback then remove it from
|
|
// the wait list and add back to the free list
|
|
//
|
|
|
|
if (pWait->IsTimedOut(dwTimeNow)) {
|
|
pWait->Execute(TRUE);
|
|
pWait->Remove();
|
|
pWait->InsertTail(&m_FreeList);
|
|
++dwCount;
|
|
} else {
|
|
|
|
//
|
|
// quit loop at first non-timed-out entry
|
|
//
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
ASSERT(dwCount != 0);
|
|
|
|
if (dwCount != 0) {
|
|
Compress(0, dwCount);
|
|
}
|
|
}
|
|
|
|
VOID PurgeInvalidHandles(VOID) {
|
|
|
|
DWORD dwCount = 0;
|
|
DWORD dwIndex = 0;
|
|
DWORD dwIndexStart = 0;
|
|
|
|
ASSERT(m_dwObjectCount <= ARRAY_ELEMENTS(m_Objects));
|
|
|
|
while (dwIndex < m_dwObjectCount) {
|
|
|
|
CWait * pWait = m_pWaiters[dwIndex];
|
|
|
|
//
|
|
// if handle has become invalid, invoke the callback then remove it
|
|
// from the wait list and add back to the free list
|
|
//
|
|
|
|
if (IsInvalidHandle(dwIndex)) {
|
|
pWait->Execute(FALSE);
|
|
pWait->Remove();
|
|
pWait->InsertTail(&m_FreeList);
|
|
if (dwIndexStart == 0) {
|
|
dwIndexStart = dwIndex;
|
|
}
|
|
++dwCount;
|
|
} else if (dwCount != 0) {
|
|
Compress(dwIndexStart, dwCount);
|
|
dwIndex = dwIndexStart - 1;
|
|
dwIndexStart = 0;
|
|
dwCount = 0;
|
|
}
|
|
++dwIndex;
|
|
}
|
|
if (dwCount != 0) {
|
|
Compress(dwIndexStart, dwCount);
|
|
}
|
|
}
|
|
|
|
VOID ProcessCompletion(DWORD dwIndex) {
|
|
|
|
CWait * pWait = m_pWaiters[dwIndex];
|
|
|
|
pWait->Execute(FALSE);
|
|
if (!pWait->IsNoRemoveItem()) {
|
|
RemoveWaiter(dwIndex);
|
|
}
|
|
}
|
|
};
|