mirror of https://github.com/tongzx/nt5src
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.
604 lines
17 KiB
604 lines
17 KiB
//============================================================================
|
|
// Copyright (c) 2000, Microsoft Corporation
|
|
//
|
|
// File: mapper.c
|
|
//
|
|
// History:
|
|
// Yi Sun June-27-2000 Created
|
|
//
|
|
// Abstract:
|
|
// We implement a locking system with read and write locks. Callers
|
|
// can simply acquire a read lock to the obj to prevent the obj
|
|
// from being released since whoever doing the release is supposed
|
|
// acquire the write lock first. Routines for mapping between
|
|
// obj pointers and handles are also provided.
|
|
//============================================================================
|
|
|
|
#include "nt.h"
|
|
#include "ntrtl.h"
|
|
#include "nturtl.h"
|
|
#include "windows.h"
|
|
#include "tapi.h"
|
|
#include "ndptsp.h"
|
|
|
|
typedef struct _RW_LOCK
|
|
{
|
|
CRITICAL_SECTION critSec; // critical section
|
|
HANDLE hEvent; // no-one-holds-any-lock event
|
|
DWORD dwRefCt; // number of threads holding locks
|
|
|
|
} RW_LOCK, *PRW_LOCK;
|
|
|
|
typedef struct _MAPPER_ENTRY
|
|
{
|
|
// DEF: a free entry is one that no obj is associated with
|
|
|
|
RW_LOCK rwLock; // a lock for each entry to ensure thread-safe
|
|
PVOID pObjPtr; // point to the mem block of the associated obj
|
|
// NULL when the entry is free
|
|
FREEOBJPROC pfnFreeProc; // function to call to free the obj
|
|
WORD wID; // id used for detecting bad handles
|
|
// valid value range: 1 - 0x7FFF
|
|
WORD wIndexNextFree; // index of the next free entry in the global
|
|
// mapper array, invalid when the entry is busy
|
|
} MAPPER_ENTRY, *PMAPPER_ENTRY;
|
|
|
|
typedef struct _HANDLE_OBJECT_MAPPER
|
|
{
|
|
RW_LOCK rwLock; // a global lock for the whole mapper
|
|
WORD wNextID; // a global id counter incremented
|
|
// after each handle mapping
|
|
WORD wIndexFreeHead; // index of head of free entry list
|
|
DWORD dwCapacity; // total number of entries in the array
|
|
DWORD dwFree; // total number of free entries left
|
|
PMAPPER_ENTRY pArray; // the global array that keeps all the mapping
|
|
|
|
} HANDLE_OBJECT_MAPPER;
|
|
|
|
// the capacity to begin with, can be read from registry
|
|
#define INITIAL_MAPPER_SIZE 32
|
|
#define MAXIMUM_MAPPER_SIZE (64 * 1024) // 16-bit index limitation
|
|
|
|
// the global mapper object
|
|
static HANDLE_OBJECT_MAPPER gMapper;
|
|
|
|
BOOL
|
|
InitializeRWLock(
|
|
IN PRW_LOCK pLock
|
|
)
|
|
{
|
|
// create an autoreset event, non-signaled initially
|
|
pLock->hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
|
|
if (NULL == pLock->hEvent)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
InitializeCriticalSection(&pLock->critSec);
|
|
pLock->dwRefCt = 0;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL
|
|
UninitializeRWLock(
|
|
IN PRW_LOCK pLock
|
|
)
|
|
{
|
|
pLock->dwRefCt = 0;
|
|
DeleteCriticalSection(&pLock->critSec);
|
|
return CloseHandle(pLock->hEvent);
|
|
}
|
|
|
|
//
|
|
// NOTE: due to the limitation of the current
|
|
// implementation, calling AcquireWriteLock()
|
|
// while holding a read lock of the same
|
|
// RW_LOCK will result in a DEADLOCK!!!
|
|
// Be sure to release the read lock before
|
|
// attempting to acquire the write lock.
|
|
// This limitation can be lifted by implementing
|
|
// lock upgrade (from read to write) which
|
|
// requires RW_LOCK to remember ids of all
|
|
// owning threads.
|
|
//
|
|
|
|
VOID
|
|
AcquireReadLock(
|
|
IN PRW_LOCK pLock
|
|
)
|
|
{
|
|
//
|
|
// increase the ref count, then leave
|
|
// the critical section to allow others
|
|
// to enter
|
|
//
|
|
EnterCriticalSection(&pLock->critSec);
|
|
++pLock->dwRefCt;
|
|
LeaveCriticalSection(&pLock->critSec);
|
|
}
|
|
|
|
VOID
|
|
ReleaseReadLock(
|
|
IN PRW_LOCK pLock
|
|
)
|
|
{
|
|
//
|
|
// decrease the ref count, check whether
|
|
// the new ref count is 0 (meaning no one
|
|
// else holds any lock), if yes, signal
|
|
// the event to allow others waiting to
|
|
// acquire write locks to continue
|
|
//
|
|
EnterCriticalSection(&pLock->critSec);
|
|
if (0 == --pLock->dwRefCt)
|
|
{
|
|
SetEvent(pLock->hEvent);
|
|
}
|
|
LeaveCriticalSection(&pLock->critSec);
|
|
}
|
|
|
|
VOID
|
|
AcquireWriteLock(
|
|
IN PRW_LOCK pLock
|
|
)
|
|
{
|
|
//
|
|
// enter critical section, check whether
|
|
// the ref count is 0: if yes, return
|
|
// without leaving the critical section
|
|
// to block others from entering; if no,
|
|
// leave the section before wait for others
|
|
// to release locks then reenter the section
|
|
//
|
|
try_entering_crit_sec:
|
|
EnterCriticalSection(&pLock->critSec);
|
|
if (pLock->dwRefCt > 0)
|
|
{
|
|
// make sure leaving critSec before waiting
|
|
LeaveCriticalSection(&pLock->critSec);
|
|
|
|
WaitForSingleObject(pLock->hEvent, INFINITE);
|
|
goto try_entering_crit_sec;
|
|
}
|
|
pLock->dwRefCt = 1;
|
|
}
|
|
|
|
VOID
|
|
ReleaseWriteLock(
|
|
IN PRW_LOCK pLock
|
|
)
|
|
{
|
|
//
|
|
// reset the ref count to 0, signal
|
|
// the event, leave the critical section
|
|
//
|
|
pLock->dwRefCt = 0;
|
|
SetEvent(pLock->hEvent);
|
|
LeaveCriticalSection(&pLock->critSec);
|
|
}
|
|
|
|
LONG
|
|
InitializeMapper(
|
|
)
|
|
{
|
|
DWORD dwIndex;
|
|
|
|
TspLog(DL_TRACE, "InitializeMapper: entering...");
|
|
|
|
// alloc and zeroinit the array
|
|
gMapper.pArray = (PMAPPER_ENTRY)
|
|
MALLOC(INITIAL_MAPPER_SIZE * sizeof(MAPPER_ENTRY));
|
|
if (NULL == gMapper.pArray)
|
|
{
|
|
TspLog(DL_ERROR,
|
|
"InitializeMapper: failed to alloc(1) mapper array");
|
|
return LINEERR_NOMEM;
|
|
}
|
|
|
|
// init the global lock for the mapper
|
|
InitializeRWLock(&gMapper.rwLock);
|
|
|
|
gMapper.wNextID = 1;
|
|
gMapper.wIndexFreeHead = 0;
|
|
gMapper.dwCapacity = INITIAL_MAPPER_SIZE;
|
|
gMapper.dwFree = INITIAL_MAPPER_SIZE;
|
|
|
|
// init the lock for each mapper entry and link the free entry list
|
|
for (dwIndex = 0; dwIndex < INITIAL_MAPPER_SIZE - 1; dwIndex++)
|
|
{
|
|
InitializeRWLock(&(gMapper.pArray[dwIndex].rwLock));
|
|
gMapper.pArray[dwIndex].wIndexNextFree = (WORD)(dwIndex + 1);
|
|
}
|
|
InitializeRWLock(&(gMapper.pArray[INITIAL_MAPPER_SIZE - 1].rwLock));
|
|
|
|
return TAPI_SUCCESS;
|
|
}
|
|
|
|
VOID
|
|
UninitializeMapper()
|
|
{
|
|
DWORD dwIndex;
|
|
|
|
for (dwIndex = 0; dwIndex < gMapper.dwCapacity; dwIndex++)
|
|
{
|
|
UninitializeRWLock(&(gMapper.pArray[dwIndex].rwLock));
|
|
}
|
|
|
|
UninitializeRWLock(&gMapper.rwLock);
|
|
|
|
FREE(gMapper.pArray);
|
|
|
|
TspLog(DL_TRACE, "UninitializeMapper: exited");
|
|
}
|
|
|
|
//
|
|
// NOTE: both OpenObjHandle() and CloseObjHandle() acquire write lock of
|
|
// gMapper.rwLock at the beginning and release it at the end;
|
|
// but that's not the case for AcquireObjReadLock(), GetObjWithReadLock(),
|
|
// AcquireObjWriteLock() and GetObjWithWriteLock(): they acquire read
|
|
// lock of gMapper.rwLock at the beginning and never release it before
|
|
// exit, the lock is actually released in either ReleaseObjReadLock()
|
|
// or ReleaseObjWriteLock(), which means the caller thread of these
|
|
// four lock-acquiring functions actually not only holds the lock
|
|
// it intends to acquire but also holds the read lock of gMapper.rwLock
|
|
// as a by-product. The reason for that is preventing CloseObjHandle()
|
|
// from getting the write lock of gMapper.rwLock while waiting for the
|
|
// write lock for a mapper entry -- that sure will result in a DEADLOCK
|
|
// because if another thread has the read lock for that entry, for it to
|
|
// release the lock, it needs to acquire the read lock of gMapper.rwLock.
|
|
// The consequence of keeping the read lock of gMapper.rwLock is that
|
|
// the caller thread has to call ReleaseObjXXXLock() to release it
|
|
// before calling OpenObjHandle() or CloseObjHandle() to avoid another
|
|
// kind of DEADLOCK (see previous NOTE).
|
|
//
|
|
|
|
LONG
|
|
OpenObjHandle(
|
|
IN PVOID pObjPtr,
|
|
IN FREEOBJPROC pfnFreeProc,
|
|
OUT HANDLE *phObj
|
|
)
|
|
{
|
|
WORD wIndex;
|
|
PMAPPER_ENTRY pEntry;
|
|
DWORD dwHandle;
|
|
|
|
AcquireWriteLock(&gMapper.rwLock);
|
|
|
|
if (0 == gMapper.dwFree)
|
|
{
|
|
DWORD dwIndex;
|
|
DWORD dwOldSize = gMapper.dwCapacity;
|
|
PMAPPER_ENTRY pOldArray = gMapper.pArray;
|
|
|
|
if (MAXIMUM_MAPPER_SIZE == gMapper.dwCapacity)
|
|
{
|
|
TspLog(DL_ERROR,
|
|
"OpenObjHandle: failed to grow mapper array");
|
|
ReleaseWriteLock(&gMapper.rwLock);
|
|
return LINEERR_OPERATIONFAILED;
|
|
}
|
|
|
|
// increase the capacity by a factor of two
|
|
gMapper.dwCapacity <<= 1;
|
|
|
|
// allocate a new array twice the old size, then zeroinit it
|
|
gMapper.pArray = (PMAPPER_ENTRY)
|
|
MALLOC(gMapper.dwCapacity * sizeof(MAPPER_ENTRY));
|
|
if (NULL == gMapper.pArray)
|
|
{
|
|
TspLog(DL_ERROR,
|
|
"OpenObjHandle: failed to alloc(2) mapper array");
|
|
ReleaseWriteLock(&gMapper.rwLock);
|
|
return LINEERR_NOMEM;
|
|
}
|
|
|
|
TspLog(DL_INFO, "OpenObjHandle: the mapper array has grown to %d",
|
|
gMapper.dwCapacity);
|
|
|
|
// copy the old array over
|
|
for (dwIndex = 0; dwIndex < dwOldSize; dwIndex++)
|
|
{
|
|
CopyMemory(&(gMapper.pArray[dwIndex].rwLock),
|
|
&(pOldArray[dwIndex].rwLock),
|
|
sizeof(RW_LOCK));
|
|
|
|
//
|
|
// Delete the lock from the old table and initialize
|
|
// the cs in the new table. Otherwise pageheap will
|
|
// assert when oldtable is being freed - and its not
|
|
// a good thing anyway. Note that since the global
|
|
// lock is held across all Acquire/Get/Release functions
|
|
// for the lock, this is a safe operation to do here -
|
|
// no object would be holding the lock when this is
|
|
// being done since we are holding the write lock
|
|
// for the gmapper.
|
|
//
|
|
DeleteCriticalSection(&pOldArray[dwIndex].rwLock.critSec);
|
|
InitializeCriticalSection(&gMapper.pArray[dwIndex].rwLock.critSec);
|
|
|
|
gMapper.pArray[dwIndex].pObjPtr = pOldArray[dwIndex].pObjPtr;
|
|
gMapper.pArray[dwIndex].pfnFreeProc =
|
|
pOldArray[dwIndex].pfnFreeProc;
|
|
gMapper.pArray[dwIndex].wID = pOldArray[dwIndex].wID;
|
|
}
|
|
|
|
// init locks for new entries and link them
|
|
for (dwIndex = dwOldSize; dwIndex < gMapper.dwCapacity - 1; dwIndex++)
|
|
{
|
|
InitializeRWLock(&(gMapper.pArray[dwIndex].rwLock));
|
|
gMapper.pArray[dwIndex].wIndexNextFree = (WORD)(dwIndex + 1);
|
|
}
|
|
InitializeRWLock(&(gMapper.pArray[gMapper.dwCapacity - 1].rwLock));
|
|
|
|
// reset the globals
|
|
gMapper.dwFree = dwOldSize;
|
|
gMapper.wIndexFreeHead = (WORD)dwOldSize;
|
|
|
|
// free the old array
|
|
FREE(pOldArray);
|
|
}
|
|
|
|
ASSERT(gMapper.dwFree != 0);
|
|
wIndex = gMapper.wIndexFreeHead;
|
|
pEntry = gMapper.pArray + wIndex;
|
|
gMapper.wIndexFreeHead = pEntry->wIndexNextFree;
|
|
gMapper.dwFree--;
|
|
|
|
pEntry->pObjPtr = pObjPtr;
|
|
pEntry->pfnFreeProc = pfnFreeProc;
|
|
pEntry->wID = gMapper.wNextID++;
|
|
|
|
// make sure wNextID is within range
|
|
if (gMapper.wNextID & 0x8000)
|
|
{
|
|
gMapper.wNextID = 1;
|
|
}
|
|
pEntry->wIndexNextFree = 0; // it's always 0 when the entry is not free
|
|
|
|
//
|
|
// bit 0 is always 0
|
|
// bits 1-16 contains the index into pArray
|
|
// bits 17-31 contains the id
|
|
//
|
|
// this enables us to differentiate the TSP handles
|
|
// created here for outgoing calls and the pseudo handles
|
|
// created in NDPROXY for incoming calls which always
|
|
// has the lower bit set
|
|
//
|
|
dwHandle = (((pEntry->wID) << 16) | wIndex) << 1;
|
|
|
|
// a handle is a ptr, so on 64-bit platform, dwHandle needs to be extended
|
|
*phObj = (HANDLE)UlongToPtr(dwHandle);
|
|
|
|
ReleaseWriteLock(&gMapper.rwLock);
|
|
return TAPI_SUCCESS;
|
|
}
|
|
|
|
LONG
|
|
CloseObjHandle(
|
|
IN HANDLE hObj
|
|
)
|
|
{
|
|
DWORD dwHandle = PtrToUlong(hObj) >> 1;
|
|
WORD wIndex = (WORD)(dwHandle & 0xFFFF);
|
|
WORD wID = (WORD)(dwHandle >> 16);
|
|
|
|
AcquireWriteLock(&gMapper.rwLock);
|
|
|
|
if ((wIndex >= gMapper.dwCapacity) ||
|
|
(wID != gMapper.pArray[wIndex].wID) ||
|
|
(NULL == gMapper.pArray[wIndex].pObjPtr))
|
|
{
|
|
TspLog(DL_WARNING, "CloseObjHandle: bad handle(%p)", hObj);
|
|
|
|
ReleaseWriteLock(&gMapper.rwLock);
|
|
return LINEERR_OPERATIONFAILED;
|
|
}
|
|
|
|
AcquireWriteLock(&gMapper.pArray[wIndex].rwLock);
|
|
|
|
#if DBG
|
|
TspLog(DL_TRACE, "CloseObjHandle: closing handle(%p)", hObj);
|
|
#endif //DBG
|
|
|
|
// free the obj
|
|
(*(gMapper.pArray[wIndex].pfnFreeProc))(gMapper.pArray[wIndex].pObjPtr);
|
|
|
|
// close obj handle
|
|
gMapper.pArray[wIndex].pObjPtr = NULL;
|
|
gMapper.pArray[wIndex].pfnFreeProc = NULL;
|
|
gMapper.pArray[wIndex].wID = 0;
|
|
|
|
// insert the entry into the free list as the head
|
|
gMapper.pArray[wIndex].wIndexNextFree = gMapper.wIndexFreeHead;
|
|
gMapper.wIndexFreeHead = wIndex;
|
|
|
|
// update the free total
|
|
gMapper.dwFree++;
|
|
|
|
ReleaseWriteLock(&gMapper.pArray[wIndex].rwLock);
|
|
ReleaseWriteLock(&gMapper.rwLock);
|
|
return TAPI_SUCCESS;
|
|
}
|
|
|
|
LONG
|
|
AcquireObjReadLock(
|
|
IN HANDLE hObj
|
|
)
|
|
{
|
|
DWORD dwHandle = PtrToUlong(hObj) >> 1;
|
|
WORD wIndex = (WORD)(dwHandle & 0xFFFF);
|
|
WORD wID = (WORD)(dwHandle >> 16);
|
|
|
|
AcquireReadLock(&gMapper.rwLock);
|
|
|
|
if ((wIndex >= gMapper.dwCapacity) ||
|
|
(wID != gMapper.pArray[wIndex].wID) ||
|
|
(NULL == gMapper.pArray[wIndex].pObjPtr))
|
|
{
|
|
TspLog(DL_WARNING, "AcquireObjReadLock: bad handle(%p)", hObj);
|
|
ReleaseReadLock(&gMapper.rwLock);
|
|
return LINEERR_OPERATIONFAILED;
|
|
}
|
|
|
|
AcquireReadLock(&gMapper.pArray[wIndex].rwLock);
|
|
|
|
#if DBG
|
|
TspLog(DL_TRACE, "AcquireObjReadLock: RefCt(%p, %d)",
|
|
hObj, gMapper.pArray[wIndex].rwLock.dwRefCt);
|
|
#endif //DBG
|
|
|
|
return TAPI_SUCCESS;
|
|
}
|
|
|
|
LONG
|
|
GetObjWithReadLock(
|
|
IN HANDLE hObj,
|
|
OUT PVOID *ppObjPtr
|
|
)
|
|
{
|
|
DWORD dwHandle = PtrToUlong(hObj) >> 1;
|
|
WORD wIndex = (WORD)(dwHandle & 0xFFFF);
|
|
WORD wID = (WORD)(dwHandle >> 16);
|
|
|
|
AcquireReadLock(&gMapper.rwLock);
|
|
|
|
if ((wIndex >= gMapper.dwCapacity) ||
|
|
(wID != gMapper.pArray[wIndex].wID) ||
|
|
(NULL == gMapper.pArray[wIndex].pObjPtr))
|
|
{
|
|
TspLog(DL_WARNING, "GetObjWithReadLock: bad handle(%p)", hObj);
|
|
ReleaseReadLock(&gMapper.rwLock);
|
|
return LINEERR_OPERATIONFAILED;
|
|
}
|
|
|
|
AcquireReadLock(&gMapper.pArray[wIndex].rwLock);
|
|
|
|
#if DBG
|
|
TspLog(DL_TRACE, "GetObjWithReadLock: RefCt(%p, %d)",
|
|
hObj, gMapper.pArray[wIndex].rwLock.dwRefCt);
|
|
#endif //DBG
|
|
|
|
*ppObjPtr = gMapper.pArray[wIndex].pObjPtr;
|
|
return TAPI_SUCCESS;
|
|
}
|
|
|
|
LONG
|
|
ReleaseObjReadLock(
|
|
IN HANDLE hObj
|
|
)
|
|
{
|
|
DWORD dwHandle = PtrToUlong(hObj) >> 1;
|
|
WORD wIndex = (WORD)(dwHandle & 0xFFFF);
|
|
WORD wID = (WORD)(dwHandle >> 16);
|
|
|
|
if ((wIndex >= gMapper.dwCapacity) ||
|
|
(wID != gMapper.pArray[wIndex].wID) ||
|
|
(NULL == gMapper.pArray[wIndex].pObjPtr))
|
|
{
|
|
TspLog(DL_WARNING, "ReleaseObjReadLock: bad handle(%p)", hObj);
|
|
return LINEERR_OPERATIONFAILED;
|
|
}
|
|
|
|
ReleaseReadLock(&gMapper.pArray[wIndex].rwLock);
|
|
|
|
#if DBG
|
|
TspLog(DL_TRACE, "ReleaseObjReadLock: RefCt(%p, %d)",
|
|
hObj, gMapper.pArray[wIndex].rwLock.dwRefCt);
|
|
#endif //DBG
|
|
|
|
ReleaseReadLock(&gMapper.rwLock);
|
|
return TAPI_SUCCESS;
|
|
}
|
|
|
|
LONG
|
|
AcquireObjWriteLock(
|
|
IN HANDLE hObj
|
|
)
|
|
{
|
|
DWORD dwHandle = PtrToUlong(hObj) >> 1;
|
|
WORD wIndex = (WORD)(dwHandle & 0xFFFF);
|
|
WORD wID = (WORD)(dwHandle >> 16);
|
|
|
|
AcquireReadLock(&gMapper.rwLock);
|
|
|
|
if ((wIndex >= gMapper.dwCapacity) ||
|
|
(wID != gMapper.pArray[wIndex].wID) ||
|
|
(NULL == gMapper.pArray[wIndex].pObjPtr))
|
|
{
|
|
TspLog(DL_WARNING, "AcquireObjWriteLock: bad handle(%p)", hObj);
|
|
ReleaseReadLock(&gMapper.rwLock);
|
|
return LINEERR_OPERATIONFAILED;
|
|
}
|
|
|
|
AcquireWriteLock(&gMapper.pArray[wIndex].rwLock);
|
|
|
|
#if DBG
|
|
TspLog(DL_TRACE, "AcquireObjWriteLock: RefCt(%p, %d)",
|
|
hObj, gMapper.pArray[wIndex].rwLock.dwRefCt);
|
|
#endif //DBG
|
|
|
|
return TAPI_SUCCESS;
|
|
}
|
|
|
|
LONG
|
|
GetObjWithWriteLock(
|
|
IN HANDLE hObj,
|
|
OUT PVOID *ppObjPtr
|
|
)
|
|
{
|
|
DWORD dwHandle = PtrToUlong(hObj) >> 1;
|
|
WORD wIndex = (WORD)(dwHandle & 0xFFFF);
|
|
WORD wID = (WORD)(dwHandle >> 16);
|
|
|
|
AcquireReadLock(&gMapper.rwLock);
|
|
|
|
if ((wIndex >= gMapper.dwCapacity) ||
|
|
(wID != gMapper.pArray[wIndex].wID) ||
|
|
(NULL == gMapper.pArray[wIndex].pObjPtr))
|
|
{
|
|
TspLog(DL_WARNING, "GetObjWithWriteLock: bad handle(%p)", hObj);
|
|
ReleaseReadLock(&gMapper.rwLock);
|
|
return LINEERR_OPERATIONFAILED;
|
|
}
|
|
|
|
AcquireWriteLock(&gMapper.pArray[wIndex].rwLock);
|
|
|
|
#if DBG
|
|
TspLog(DL_TRACE, "GetObjWithWriteLock: RefCt(%p, %d)",
|
|
hObj, gMapper.pArray[wIndex].rwLock.dwRefCt);
|
|
#endif //DBG
|
|
|
|
*ppObjPtr = gMapper.pArray[wIndex].pObjPtr;
|
|
return TAPI_SUCCESS;
|
|
}
|
|
|
|
LONG
|
|
ReleaseObjWriteLock(
|
|
IN HANDLE hObj
|
|
)
|
|
{
|
|
DWORD dwHandle = PtrToUlong(hObj) >> 1;
|
|
WORD wIndex = (WORD)(dwHandle & 0xFFFF);
|
|
WORD wID = (WORD)(dwHandle >> 16);
|
|
|
|
if ((wIndex >= gMapper.dwCapacity) ||
|
|
(wID != gMapper.pArray[wIndex].wID) ||
|
|
(NULL == gMapper.pArray[wIndex].pObjPtr))
|
|
{
|
|
TspLog(DL_WARNING, "ReleaseObjWriteLock: bad handle(%p)", hObj);
|
|
return LINEERR_OPERATIONFAILED;
|
|
}
|
|
|
|
ReleaseWriteLock(&gMapper.pArray[wIndex].rwLock);
|
|
|
|
#if DBG
|
|
TspLog(DL_TRACE, "ReleaseObjWriteLock: RefCt(%p, %d)",
|
|
hObj, gMapper.pArray[wIndex].rwLock.dwRefCt);
|
|
#endif //DBG
|
|
|
|
ReleaseReadLock(&gMapper.rwLock);
|
|
return TAPI_SUCCESS;
|
|
}
|