111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
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/*++
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Copyright (c) 1995 Microsoft Corporation
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Module Name:
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Abstract:
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File contains the following functions
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UpdateCache
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Revision History:
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Amritansh Raghav 6/8/95 Created
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--*/
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//
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// Include files
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//
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#include "allinc.h"
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PSZ
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CacheToA(
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DWORD dwCache
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);
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DWORD
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UpdateCache(
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DWORD dwCache
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)
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/*++
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Routine Description:
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Function used to update a cache. It checks to see if the last time
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the cache was updated is greater than the time out (A value of 0
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for the last time of update means the cache is invalid), calls the
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function that loads the cache and then sets the last update time
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Arguments:
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dwCache This is one of the Cache Ids defined in
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rtrmgr/defs.h. It is used to index into the
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table of locks protecting the caches, the table
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of function pointers that holds a pointer to a
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function that loads the cache andthe table of
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last update times
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Returns:
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NO_ERROR or some error code
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--*/
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{
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DWORD dwResult = NO_ERROR;
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LONG dwNeed;
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LONG dwSpace;
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TRACE1("Trying to update %s Cache",CacheToA(dwCache));
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__try
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{
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EnterWriter(dwCache);
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if((g_dwLastUpdateTable[dwCache] isnot 0) and
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((GetCurrentTime() - g_dwLastUpdateTable[dwCache]) < g_dwTimeoutTable[dwCache]))
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{
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dwResult = NO_ERROR;
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__leave;
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}
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TRACE1("%s Cache out of date",CacheToA(dwCache));
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dwResult = (*g_pfnLoadFunctionTable[dwCache])();
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if(dwResult isnot NO_ERROR)
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{
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TRACE1("Unable to load %s Cache\n",CacheToA(dwCache));
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g_dwLastUpdateTable[dwCache] = 0;
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__leave;
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}
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TRACE1("%s Cache loaded successfully\n",CacheToA(dwCache));
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g_dwLastUpdateTable[dwCache] = GetCurrentTime();
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dwResult = NO_ERROR;
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}
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__finally
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{
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ReleaseLock(dwCache);
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}
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return(dwResult);
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}
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PSZ
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CacheToA(
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DWORD dwCache
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)
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{
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static PSZ cacheName[] = {
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"System ",
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"Interfaces",
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"Ip Address Table",
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"Ip Forward Table",
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"Ip Net To Media table",
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"Tcp Table",
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"Udp Table",
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"Arp Entity Table",
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"Illegal Cache Number - ABORT!!!!"
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};
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return((((int) dwCache<0) or (dwCache >= NUM_CACHE - 1))?
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cacheName[NUM_CACHE-1] : cacheName[dwCache]);
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}
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