662 lines
17 KiB
C
662 lines
17 KiB
C
|
//---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Copyright (c) Microsoft Corporation 1993-1994
|
||
|
|
//
|
||
|
|
// File: cache.c
|
||
|
|
//
|
||
|
|
// This files contains code for the common cache lists
|
||
|
|
//
|
||
|
|
// History:
|
||
|
|
// 09-02-93 ScottH Created
|
||
|
|
// 01-31-94 ScottH Split into separate files
|
||
|
|
//
|
||
|
|
//---------------------------------------------------------------------------
|
||
|
|
|
||
|
|
///////////////////////////////////////////////////// INCLUDES
|
||
|
|
|
||
|
|
#include "brfprv.h" // common headers
|
||
|
|
|
||
|
|
///////////////////////////////////////////////////// TYPEDEFS
|
||
|
|
|
||
|
|
typedef struct tagCITEM
|
||
|
|
{
|
||
|
|
int atomKey;
|
||
|
|
DEBUG_CODE( LPCTSTR pszKey; )
|
||
|
|
|
||
|
|
LPVOID pvValue;
|
||
|
|
UINT ucRef;
|
||
|
|
} CITEM; // item for generic cache
|
||
|
|
|
||
|
|
|
||
|
|
#define Cache_EnterCS(this) EnterCriticalSection(&(this)->cs)
|
||
|
|
#define Cache_LeaveCS(this) LeaveCriticalSection(&(this)->cs)
|
||
|
|
|
||
|
|
|
||
|
|
#define CACHE_GROW 8
|
||
|
|
|
||
|
|
#define Cache_Bogus(this) (!(this)->hdpa || !(this)->hdpaFree || !(this)->hdsa)
|
||
|
|
|
||
|
|
// Given an index into the DPA, get the pointer to the DSA
|
||
|
|
//
|
||
|
|
#define MyGetPtr(this, idpa) DSA_GetItemPtr((this)->hdsa, (int)DPA_FastGetPtr((this)->hdpa, idpa))
|
||
|
|
|
||
|
|
#define DSA_GetPtrIndex(hdsa, ptr, cbItem) \
|
||
|
|
((int)( (DWORD)(ptr) - (DWORD)DSA_GetItemPtr(hdsa, 0) ) / (cbItem))
|
||
|
|
|
||
|
|
|
||
|
|
/*----------------------------------------------------------
|
||
|
|
Purpose: Compare two CRLs by pathname
|
||
|
|
Returns: -1 if <, 0 if ==, 1 if >
|
||
|
|
Cond: --
|
||
|
|
*/
|
||
|
|
int CALLBACK _export Cache_CompareIndexes(
|
||
|
|
LPVOID lpv1,
|
||
|
|
LPVOID lpv2,
|
||
|
|
LPARAM lParam)
|
||
|
|
{
|
||
|
|
int i1 = (int)lpv1;
|
||
|
|
int i2 = (int)lpv2;
|
||
|
|
HDSA hdsa = (HDSA)lParam;
|
||
|
|
CITEM * pitem1 = (CITEM *)DSA_GetItemPtr(hdsa, i1);
|
||
|
|
CITEM * pitem2 = (CITEM *)DSA_GetItemPtr(hdsa, i2);
|
||
|
|
|
||
|
|
if (pitem1->atomKey < pitem2->atomKey)
|
||
|
|
return -1;
|
||
|
|
else if (pitem1->atomKey == pitem2->atomKey)
|
||
|
|
return 0;
|
||
|
|
else
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*----------------------------------------------------------
|
||
|
|
Purpose: Compare two CRLs by pathname
|
||
|
|
Returns: -1 if <, 0 if ==, 1 if >
|
||
|
|
Cond: --
|
||
|
|
*/
|
||
|
|
int CALLBACK _export Cache_Compare(
|
||
|
|
LPVOID lpv1,
|
||
|
|
LPVOID lpv2,
|
||
|
|
LPARAM lParam)
|
||
|
|
{
|
||
|
|
// HACK: we know the first param is the address to a struct
|
||
|
|
// that contains the search criteria. The second is an index
|
||
|
|
// into the DSA.
|
||
|
|
//
|
||
|
|
int i2 = (int)lpv2;
|
||
|
|
HDSA hdsa = (HDSA)lParam;
|
||
|
|
CITEM * pitem1 = (CITEM *)lpv1;
|
||
|
|
CITEM * pitem2 = (CITEM *)DSA_GetItemPtr(hdsa, i2);
|
||
|
|
|
||
|
|
if (pitem1->atomKey < pitem2->atomKey)
|
||
|
|
return -1;
|
||
|
|
else if (pitem1->atomKey == pitem2->atomKey)
|
||
|
|
return 0;
|
||
|
|
else
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*----------------------------------------------------------
|
||
|
|
Purpose: Initialize the cache structure
|
||
|
|
Returns: TRUE on success
|
||
|
|
Cond: --
|
||
|
|
*/
|
||
|
|
BOOL PUBLIC Cache_Init(
|
||
|
|
CACHE * pcache)
|
||
|
|
{
|
||
|
|
BOOL bRet;
|
||
|
|
|
||
|
|
ASSERT(pcache);
|
||
|
|
|
||
|
|
Cache_EnterCS(pcache);
|
||
|
|
{
|
||
|
|
if ((pcache->hdsa = DSA_Create(sizeof(CITEM), CACHE_GROW)) != NULL)
|
||
|
|
{
|
||
|
|
if ((pcache->hdpa = DPA_Create(CACHE_GROW)) == NULL)
|
||
|
|
{
|
||
|
|
DSA_Destroy(pcache->hdsa);
|
||
|
|
pcache->hdsa = NULL;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if ((pcache->hdpaFree = DPA_Create(CACHE_GROW)) == NULL)
|
||
|
|
{
|
||
|
|
DPA_Destroy(pcache->hdpa);
|
||
|
|
DSA_Destroy(pcache->hdsa);
|
||
|
|
pcache->hdpa = NULL;
|
||
|
|
pcache->hdsa = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
bRet = pcache->hdsa != NULL;
|
||
|
|
}
|
||
|
|
Cache_LeaveCS(pcache);
|
||
|
|
|
||
|
|
return bRet;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*----------------------------------------------------------
|
||
|
|
Purpose: Initializes the cache's critical section.
|
||
|
|
|
||
|
|
Returns: --
|
||
|
|
Cond: --
|
||
|
|
*/
|
||
|
|
void PUBLIC Cache_InitCS(
|
||
|
|
CACHE * pcache)
|
||
|
|
{
|
||
|
|
ASSERT(pcache);
|
||
|
|
ZeroInit(pcache, CACHE);
|
||
|
|
InitializeCriticalSection(&pcache->cs);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*----------------------------------------------------------
|
||
|
|
Purpose: Destroy the cache
|
||
|
|
Returns: --
|
||
|
|
Cond: --
|
||
|
|
*/
|
||
|
|
void PUBLIC Cache_Term(
|
||
|
|
CACHE * pcache,
|
||
|
|
HWND hwndOwner,
|
||
|
|
PFNFREEVALUE pfnFree)
|
||
|
|
{
|
||
|
|
ASSERT(pcache);
|
||
|
|
ASSERT(!IsBadCodePtr((PROC)pfnFree));
|
||
|
|
Cache_EnterCS(pcache);
|
||
|
|
{
|
||
|
|
if (pcache->hdpa != NULL)
|
||
|
|
{
|
||
|
|
CITEM * pitem;
|
||
|
|
int idpa;
|
||
|
|
int cItem;
|
||
|
|
|
||
|
|
ASSERT(pcache->hdsa != NULL);
|
||
|
|
|
||
|
|
cItem = DPA_GetPtrCount(pcache->hdpa);
|
||
|
|
for (idpa = 0; idpa < cItem; idpa++)
|
||
|
|
{
|
||
|
|
pitem = MyGetPtr(pcache, idpa);
|
||
|
|
|
||
|
|
if (!IsBadCodePtr((PROC)pfnFree))
|
||
|
|
pfnFree(pitem->pvValue, hwndOwner);
|
||
|
|
|
||
|
|
// Decrement reference count of atomKey
|
||
|
|
Atom_Delete(pitem->atomKey);
|
||
|
|
}
|
||
|
|
DPA_Destroy(pcache->hdpa);
|
||
|
|
pcache->hdpa = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pcache->hdpaFree != NULL)
|
||
|
|
{
|
||
|
|
DPA_Destroy(pcache->hdpaFree);
|
||
|
|
pcache->hdpaFree = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pcache->hdsa != NULL)
|
||
|
|
{
|
||
|
|
DSA_Destroy(pcache->hdsa);
|
||
|
|
pcache->hdsa = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
Cache_LeaveCS(pcache);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*----------------------------------------------------------
|
||
|
|
Purpose: Deletes the cache's critical section.
|
||
|
|
|
||
|
|
Returns: --
|
||
|
|
Cond: --
|
||
|
|
*/
|
||
|
|
void PUBLIC Cache_DeleteCS(
|
||
|
|
CACHE * pcache)
|
||
|
|
{
|
||
|
|
// The cache should not be in use now (ie, it should be bogus)
|
||
|
|
ASSERT(Cache_Bogus(pcache));
|
||
|
|
|
||
|
|
if (Cache_Bogus(pcache))
|
||
|
|
{
|
||
|
|
DeleteCriticalSection(&pcache->cs);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*----------------------------------------------------------
|
||
|
|
Purpose: Add an item to the cache list.
|
||
|
|
Returns: TRUE on success
|
||
|
|
|
||
|
|
Cond: If this fails, pvValue is not automatically freed
|
||
|
|
*/
|
||
|
|
BOOL PUBLIC Cache_AddItem(
|
||
|
|
CACHE * pcache,
|
||
|
|
int atomKey,
|
||
|
|
LPVOID pvValue)
|
||
|
|
{
|
||
|
|
BOOL bRet = FALSE;
|
||
|
|
CITEM * pitem = NULL;
|
||
|
|
int cItem;
|
||
|
|
int cFree;
|
||
|
|
|
||
|
|
ASSERT(pcache);
|
||
|
|
Cache_EnterCS(pcache);
|
||
|
|
{
|
||
|
|
VALIDATE_ATOM(atomKey);
|
||
|
|
|
||
|
|
if (!Cache_Bogus(pcache))
|
||
|
|
{
|
||
|
|
int iItem;
|
||
|
|
|
||
|
|
// Add a new entry to the cache. The cache has no set size limitation.
|
||
|
|
//
|
||
|
|
cFree = DPA_GetPtrCount(pcache->hdpaFree);
|
||
|
|
if (cFree > 0)
|
||
|
|
{
|
||
|
|
// Use a free entry
|
||
|
|
//
|
||
|
|
cFree--;
|
||
|
|
iItem = (int)DPA_DeletePtr(pcache->hdpaFree, cFree);
|
||
|
|
pitem = DSA_GetItemPtr(pcache->hdsa, iItem);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
CITEM itemDummy;
|
||
|
|
|
||
|
|
// Allocate a new entry
|
||
|
|
//
|
||
|
|
cItem = DSA_GetItemCount(pcache->hdsa);
|
||
|
|
if ((iItem = DSA_InsertItem(pcache->hdsa, cItem+1, &itemDummy)) != -1)
|
||
|
|
pitem = DSA_GetItemPtr(pcache->hdsa, iItem);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Fill in the info
|
||
|
|
//
|
||
|
|
if (pitem)
|
||
|
|
{
|
||
|
|
pitem->ucRef = 0;
|
||
|
|
pitem->pvValue = pvValue;
|
||
|
|
pitem->atomKey = atomKey;
|
||
|
|
DEBUG_CODE( pitem->pszKey = Atom_GetName(atomKey); )
|
||
|
|
|
||
|
|
// Now increment the reference count on this atomKey so it doesn't
|
||
|
|
// get deleted from beneath us!
|
||
|
|
Atom_AddRef(atomKey);
|
||
|
|
|
||
|
|
// Add the new entry to the ptr list and sort
|
||
|
|
//
|
||
|
|
cItem = DPA_GetPtrCount(pcache->hdpa);
|
||
|
|
if (DPA_InsertPtr(pcache->hdpa, cItem+1, (LPVOID)iItem) == -1)
|
||
|
|
goto Add_Fail;
|
||
|
|
DPA_Sort(pcache->hdpa, Cache_CompareIndexes, (LPARAM)pcache->hdsa);
|
||
|
|
|
||
|
|
// Reset the FindFirst/FindNext in case this gets called in the
|
||
|
|
// middle of an enumeration.
|
||
|
|
//
|
||
|
|
pcache->atomPrev = ATOM_ERR;
|
||
|
|
bRet = TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
Add_Fail:
|
||
|
|
if (!bRet)
|
||
|
|
{
|
||
|
|
// Add the entry to the free list and fail. If even this
|
||
|
|
// fails, we simply lose some slight efficiency, but this is
|
||
|
|
// not a memory leak.
|
||
|
|
//
|
||
|
|
DPA_InsertPtr(pcache->hdpaFree, cFree+1, (LPVOID)iItem);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
Cache_LeaveCS(pcache);
|
||
|
|
|
||
|
|
return bRet;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*----------------------------------------------------------
|
||
|
|
Purpose: Delete an item from the cache.
|
||
|
|
If the reference count is 0, we do nothing.
|
||
|
|
This also frees the actual value as well, using the
|
||
|
|
pfnFreeValue function.
|
||
|
|
|
||
|
|
Returns: The reference count. If 0, then we deleted it from cache.
|
||
|
|
|
||
|
|
Cond: N.b. Decrements the reference count.
|
||
|
|
*/
|
||
|
|
int PUBLIC Cache_DeleteItem(
|
||
|
|
CACHE * pcache,
|
||
|
|
int atomKey,
|
||
|
|
BOOL bNuke, // TRUE to ignore reference count
|
||
|
|
HWND hwndOwner,
|
||
|
|
PFNFREEVALUE pfnFree)
|
||
|
|
{
|
||
|
|
int nRet = 0;
|
||
|
|
CITEM item;
|
||
|
|
CITEM * pitem;
|
||
|
|
int idpa;
|
||
|
|
int cFree;
|
||
|
|
|
||
|
|
ASSERT(pcache);
|
||
|
|
ASSERT(!IsBadCodePtr((PROC)pfnFree));
|
||
|
|
Cache_EnterCS(pcache);
|
||
|
|
{
|
||
|
|
if (!Cache_Bogus(pcache))
|
||
|
|
{
|
||
|
|
item.atomKey = atomKey;
|
||
|
|
idpa = DPA_Search(pcache->hdpa, &item, 0, Cache_Compare, (LPARAM)pcache->hdsa,
|
||
|
|
DPAS_SORTED);
|
||
|
|
if (idpa != -1)
|
||
|
|
{
|
||
|
|
VALIDATE_ATOM(atomKey);
|
||
|
|
|
||
|
|
pitem = MyGetPtr(pcache, idpa);
|
||
|
|
|
||
|
|
if (!bNuke && pitem->ucRef-- > 0)
|
||
|
|
{
|
||
|
|
nRet = pitem->ucRef+1;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
int iItem;
|
||
|
|
|
||
|
|
DPA_DeletePtr(pcache->hdpa, idpa);
|
||
|
|
|
||
|
|
// Free old pointer
|
||
|
|
if (!IsBadCodePtr((PROC)pfnFree))
|
||
|
|
pfnFree(pitem->pvValue, hwndOwner);
|
||
|
|
|
||
|
|
Atom_Delete(pitem->atomKey);
|
||
|
|
|
||
|
|
DEBUG_CODE( pitem->atomKey = -1; )
|
||
|
|
DEBUG_CODE( pitem->pszKey = NULL; )
|
||
|
|
DEBUG_CODE( pitem->pvValue = NULL; )
|
||
|
|
DEBUG_CODE( pitem->ucRef = 0; )
|
||
|
|
|
||
|
|
// Reset the FindFirst/FindNext in case this gets
|
||
|
|
// called in the middle of an enumeration.
|
||
|
|
//
|
||
|
|
pcache->atomPrev = ATOM_ERR;
|
||
|
|
|
||
|
|
// Add ptr to the free list. If this fails, we simply lose
|
||
|
|
// some efficiency in reusing this portion of the cache.
|
||
|
|
// This is not a memory leak.
|
||
|
|
//
|
||
|
|
cFree = DPA_GetPtrCount(pcache->hdpaFree);
|
||
|
|
iItem = DSA_GetPtrIndex(pcache->hdsa, pitem, sizeof(CITEM));
|
||
|
|
DPA_InsertPtr(pcache->hdpaFree, cFree+1, (LPVOID)iItem);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
Cache_LeaveCS(pcache);
|
||
|
|
|
||
|
|
return nRet;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*----------------------------------------------------------
|
||
|
|
Purpose: Replace the contents of the value in the cache list.
|
||
|
|
If a value does not exist for the given key, return FALSE.
|
||
|
|
Returns: TRUE if success
|
||
|
|
Cond: --
|
||
|
|
*/
|
||
|
|
BOOL PUBLIC Cache_ReplaceItem(
|
||
|
|
CACHE * pcache,
|
||
|
|
int atomKey,
|
||
|
|
LPVOID pvBuf,
|
||
|
|
int cbBuf)
|
||
|
|
{
|
||
|
|
BOOL bRet = FALSE;
|
||
|
|
CITEM item;
|
||
|
|
CITEM * pitem;
|
||
|
|
int idpa;
|
||
|
|
|
||
|
|
ASSERT(pcache);
|
||
|
|
Cache_EnterCS(pcache);
|
||
|
|
{
|
||
|
|
if (!Cache_Bogus(pcache))
|
||
|
|
{
|
||
|
|
// Search for an existing cache entry
|
||
|
|
//
|
||
|
|
item.atomKey = atomKey;
|
||
|
|
idpa = DPA_Search(pcache->hdpa, &item, 0, Cache_Compare, (LPARAM)pcache->hdsa,
|
||
|
|
DPAS_SORTED);
|
||
|
|
|
||
|
|
if (idpa != -1)
|
||
|
|
{
|
||
|
|
// Found a value for this key. Replace the contents.
|
||
|
|
//
|
||
|
|
pitem = MyGetPtr(pcache, idpa);
|
||
|
|
ASSERT(pitem);
|
||
|
|
|
||
|
|
BltByte(pvBuf, pitem->pvValue, cbBuf);
|
||
|
|
bRet = TRUE;
|
||
|
|
|
||
|
|
// No need to sort because key hasn't changed.
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
Cache_LeaveCS(pcache);
|
||
|
|
|
||
|
|
return bRet;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*----------------------------------------------------------
|
||
|
|
Purpose: Get the value of the given key and return a ptr to it
|
||
|
|
Returns: Ptr to actual entry
|
||
|
|
|
||
|
|
Cond: Reference count is incremented
|
||
|
|
*/
|
||
|
|
LPVOID PUBLIC Cache_GetPtr(
|
||
|
|
CACHE * pcache,
|
||
|
|
int atomKey)
|
||
|
|
{
|
||
|
|
LPVOID pvRet = NULL;
|
||
|
|
CITEM item;
|
||
|
|
CITEM * pitem;
|
||
|
|
int idpa;
|
||
|
|
|
||
|
|
ASSERT(pcache);
|
||
|
|
Cache_EnterCS(pcache);
|
||
|
|
{
|
||
|
|
if (!Cache_Bogus(pcache))
|
||
|
|
{
|
||
|
|
item.atomKey = atomKey;
|
||
|
|
idpa = DPA_Search(pcache->hdpa, &item, 0, Cache_Compare, (LPARAM)pcache->hdsa,
|
||
|
|
DPAS_SORTED);
|
||
|
|
if (idpa != -1)
|
||
|
|
{
|
||
|
|
pitem = MyGetPtr(pcache, idpa);
|
||
|
|
ASSERT(pitem);
|
||
|
|
|
||
|
|
pitem->ucRef++;
|
||
|
|
pvRet = pitem->pvValue;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
Cache_LeaveCS(pcache);
|
||
|
|
|
||
|
|
return pvRet;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef DEBUG
|
||
|
|
/*----------------------------------------------------------
|
||
|
|
Purpose: Get the current reference count
|
||
|
|
Returns: Ptr to actual entry
|
||
|
|
|
||
|
|
Cond: Used for debugging
|
||
|
|
*/
|
||
|
|
UINT PUBLIC Cache_GetRefCount(
|
||
|
|
CACHE * pcache,
|
||
|
|
int atomKey)
|
||
|
|
{
|
||
|
|
UINT ucRef = (UINT)-1;
|
||
|
|
CITEM item;
|
||
|
|
CITEM * pitem;
|
||
|
|
int idpa;
|
||
|
|
|
||
|
|
ASSERT(pcache);
|
||
|
|
Cache_EnterCS(pcache);
|
||
|
|
{
|
||
|
|
if (!Cache_Bogus(pcache))
|
||
|
|
{
|
||
|
|
item.atomKey = atomKey;
|
||
|
|
idpa = DPA_Search(pcache->hdpa, &item, 0, Cache_Compare, (LPARAM)pcache->hdsa,
|
||
|
|
DPAS_SORTED);
|
||
|
|
if (idpa != -1)
|
||
|
|
{
|
||
|
|
pitem = MyGetPtr(pcache, idpa);
|
||
|
|
ASSERT(pitem);
|
||
|
|
|
||
|
|
ucRef = pitem->ucRef;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
Cache_LeaveCS(pcache);
|
||
|
|
|
||
|
|
return ucRef;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/*----------------------------------------------------------
|
||
|
|
Purpose: Get the value of the given key and return a copy of it
|
||
|
|
in the supplied buffer
|
||
|
|
Returns: Copy of value in buffer
|
||
|
|
TRUE if found, FALSE if not
|
||
|
|
|
||
|
|
Cond: --
|
||
|
|
*/
|
||
|
|
BOOL PUBLIC Cache_GetItem(
|
||
|
|
CACHE * pcache,
|
||
|
|
int atomKey,
|
||
|
|
LPVOID pvBuf,
|
||
|
|
int cbBuf)
|
||
|
|
{
|
||
|
|
BOOL bRet = FALSE;
|
||
|
|
CITEM item;
|
||
|
|
CITEM * pitem;
|
||
|
|
int idpa;
|
||
|
|
|
||
|
|
ASSERT(pcache);
|
||
|
|
Cache_EnterCS(pcache);
|
||
|
|
{
|
||
|
|
if (!Cache_Bogus(pcache))
|
||
|
|
{
|
||
|
|
item.atomKey = atomKey;
|
||
|
|
idpa = DPA_Search(pcache->hdpa, &item, 0, Cache_Compare, (LPARAM)pcache->hdsa,
|
||
|
|
DPAS_SORTED);
|
||
|
|
if (idpa != -1)
|
||
|
|
{
|
||
|
|
pitem = MyGetPtr(pcache, idpa);
|
||
|
|
ASSERT(pitem);
|
||
|
|
|
||
|
|
BltByte(pvBuf, pitem->pvValue, cbBuf);
|
||
|
|
bRet = TRUE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
Cache_LeaveCS(pcache);
|
||
|
|
|
||
|
|
return bRet;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*----------------------------------------------------------
|
||
|
|
Purpose: Get the first key in the cache.
|
||
|
|
Returns: Atom
|
||
|
|
ATOM_ERR if cache is empty
|
||
|
|
Cond: --
|
||
|
|
*/
|
||
|
|
int PUBLIC Cache_FindFirstKey(
|
||
|
|
CACHE * pcache)
|
||
|
|
{
|
||
|
|
int atomRet = ATOM_ERR;
|
||
|
|
CITEM * pitem;
|
||
|
|
|
||
|
|
ASSERT(pcache);
|
||
|
|
Cache_EnterCS(pcache);
|
||
|
|
{
|
||
|
|
if (!Cache_Bogus(pcache))
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
pcache->iPrev = 0;
|
||
|
|
if (DPA_GetPtrCount(pcache->hdpa) > 0)
|
||
|
|
{
|
||
|
|
i = (int)DPA_FastGetPtr(pcache->hdpa, 0);
|
||
|
|
|
||
|
|
pitem = DSA_GetItemPtr(pcache->hdsa, i);
|
||
|
|
|
||
|
|
pcache->atomPrev = pitem->atomKey;
|
||
|
|
atomRet = pitem->atomKey;
|
||
|
|
|
||
|
|
VALIDATE_ATOM(atomRet);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
Cache_LeaveCS(pcache);
|
||
|
|
|
||
|
|
return atomRet;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*----------------------------------------------------------
|
||
|
|
Purpose: Get the next key in the cache.
|
||
|
|
Returns: Atom
|
||
|
|
ATOM_ERR if we're at the end of the cache
|
||
|
|
Cond: --
|
||
|
|
*/
|
||
|
|
int PUBLIC Cache_FindNextKey(
|
||
|
|
CACHE * pcache,
|
||
|
|
int atomPrev)
|
||
|
|
{
|
||
|
|
int atomRet = ATOM_ERR;
|
||
|
|
CITEM * pitem;
|
||
|
|
|
||
|
|
ASSERT(pcache);
|
||
|
|
Cache_EnterCS(pcache);
|
||
|
|
{
|
||
|
|
if (!Cache_Bogus(pcache))
|
||
|
|
{
|
||
|
|
if (atomPrev != ATOM_ERR)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (atomPrev != pcache->atomPrev)
|
||
|
|
{
|
||
|
|
CITEM item;
|
||
|
|
|
||
|
|
// Search for atomPrev or next one nearest to it.
|
||
|
|
//
|
||
|
|
item.atomKey = atomPrev;
|
||
|
|
pcache->iPrev = DPA_Search(pcache->hdpa, &item, 0, Cache_Compare,
|
||
|
|
(LPARAM)pcache->hdsa, DPAS_SORTED | DPAS_INSERTBEFORE);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
pcache->iPrev++;
|
||
|
|
|
||
|
|
if (DPA_GetPtrCount(pcache->hdpa) > pcache->iPrev)
|
||
|
|
{
|
||
|
|
i = (int)DPA_FastGetPtr(pcache->hdpa, pcache->iPrev);
|
||
|
|
pitem = DSA_GetItemPtr(pcache->hdsa, i);
|
||
|
|
|
||
|
|
pcache->atomPrev = pitem->atomKey;
|
||
|
|
atomRet = pitem->atomKey;
|
||
|
|
|
||
|
|
VALIDATE_ATOM(atomRet);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
Cache_LeaveCS(pcache);
|
||
|
|
|
||
|
|
return atomRet;
|
||
|
|
}
|
||
|
|
|
||
|
|
|