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79 lines
1.3 KiB
79 lines
1.3 KiB
/*++
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Copyright (C) Microsoft Corporation, 1996 - 1999
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Module Name:
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hndlcach.cxx
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Abstract:
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The handle cache.
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Author:
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Kamen Moutafov [KamenM]
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Revision History:
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--*/
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#include <precomp.hxx>
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HandleCache::~HandleCache(void)
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{
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int i;
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BOOL b;
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for (i = 0; i < DEFAULT_CACHE_SIZE; i ++)
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{
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if (cacheSlots[i] == NULL)
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{
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b = CloseHandle(cacheSlots[i]);
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ASSERT(b);
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cacheSlots[i] = NULL;
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}
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}
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}
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HANDLE HandleCache::CheckOutHandle(void)
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{
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int i;
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HANDLE h;
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for (i = 0; i < DEFAULT_CACHE_SIZE; i++)
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{
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if (cacheSlots[i] != NULL)
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{
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h = cacheSlots[i];
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cacheSlots[i] = NULL;
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return h;
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}
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}
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return NULL;
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}
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void HandleCache::CheckinHandle(HANDLE *ph)
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{
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int i;
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for (i = 0; i < DEFAULT_CACHE_SIZE; i++)
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{
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if ( NULL == InterlockedCompareExchangePointer(&cacheSlots[i],
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*ph, NULL) )
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{
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*ph = NULL;
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break;
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}
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}
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}
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#if defined(DBG) || defined(_DEBUG)
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BOOL HandleCache::IsSecondHandleUsed(void)
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{
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ASSERT (DEFAULT_CACHE_SIZE >= 2);
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return (cacheSlots[1] != NULL);
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}
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#endif
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