[sql] Import reference version of SQLite 3.7.6.3.

third_party/sqlite/sqlite-src-3070603/src/pcache1.c

 /*
 ** 2008 November 05
 **
 ** The author disclaims copyright to this source code.  In place of
 ** a legal notice, here is a blessing:
 **
 **    May you do good and not evil.
 **    May you find forgiveness for yourself and forgive others.
 **    May you share freely, never taking more than you give.
 **
@@ skipping 531 matching lines @@
 ** Implementation of the sqlite3_pcache.xCreate method.
 **
 ** Allocate a new cache.
 */
 static sqlite3_pcache *pcache1Create(int szPage, int bPurgeable){
   PCache1 *pCache;      /* The newly created page cache */
   PGroup *pGroup;       /* The group the new page cache will belong to */
   int sz;               /* Bytes of memory required to allocate the new cache */
 
   /*
-  ** The separateCache variable is true if each PCache has its own private
+  ** The seperateCache variable is true if each PCache has its own private
   ** PGroup.  In other words, separateCache is true for mode (1) where no
   ** mutexing is required.
   **
-  **   *  Always use separate caches (mode-1) if SQLITE_SEPARATE_CACHE_POOLS
-  **
   **   *  Always use a unified cache (mode-2) if ENABLE_MEMORY_MANAGEMENT
   **
   **   *  Always use a unified cache in single-threaded applications
   **
   **   *  Otherwise (if multi-threaded and ENABLE_MEMORY_MANAGEMENT is off)
   **      use separate caches (mode-1)
   */
-#ifdef SQLITE_SEPARATE_CACHE_POOLS
-  const int separateCache = 1;
-#elif defined(SQLITE_ENABLE_MEMORY_MANAGEMENT) || SQLITE_THREADSAFE==0
+#if defined(SQLITE_ENABLE_MEMORY_MANAGEMENT) || SQLITE_THREADSAFE==0
   const int separateCache = 0;
 #else
   int separateCache = sqlite3GlobalConfig.bCoreMutex>0;
 #endif
 
   sz = sizeof(PCache1) + sizeof(PGroup)*separateCache;
   pCache = (PCache1 *)sqlite3_malloc(sz);
   if( pCache ){
     memset(pCache, 0, sz);
     if( separateCache ){
@@ skipping 382 matching lines @@
   int nRecyclable = 0;
   for(p=pcache1.grp.pLruHead; p; p=p->pLruNext){
     nRecyclable++;
   }
   *pnCurrent = pcache1.grp.nCurrentPage;
   *pnMax = pcache1.grp.nMaxPage;
   *pnMin = pcache1.grp.nMinPage;
   *pnRecyclable = nRecyclable;
 }
 #endif