Import SQLite 3.7.6.3.

third_party/sqlite/src/src/mem3.c

 /*
 ** 2007 October 14
 **
 ** 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.
 **
 *************************************************************************
 ** This file contains the C functions that implement a memory
 ** allocation subsystem for use by SQLite. 
 **
 ** This version of the memory allocation subsystem omits all
 ** use of malloc(). The SQLite user supplies a block of memory
 ** before calling sqlite3_initialize() from which allocations
 ** are made and returned by the xMalloc() and xRealloc() 
 ** implementations. Once sqlite3_initialize() has been called,
 ** the amount of memory available to SQLite is fixed and cannot
 ** be changed.
 **
 ** This version of the memory allocation subsystem is included
 ** in the build only if SQLITE_ENABLE_MEMSYS3 is defined.
-**
-** $Id: mem3.c,v 1.25 2008/11/19 16:52:44 danielk1977 Exp $
 */
 #include "sqliteInt.h"
 
 /*
 ** This version of the memory allocator is only built into the library
 ** SQLITE_ENABLE_MEMSYS3 is defined. Defining this symbol does not
 ** mean that the library will use a memory-pool by default, just that
 ** it is available. The mempool allocator is activated by calling
 ** sqlite3_config().
 */
@@ skipping 534 matching lines @@
   mem3.aPool[mem3.nPool].u.hdr.size4x = 1;
 
   return SQLITE_OK;
 }
 
 /*
 ** Deinitialize this module.
 */
 static void memsys3Shutdown(void *NotUsed){
   UNUSED_PARAMETER(NotUsed);
+  mem3.mutex = 0;
   return;
 }
 
 
 
 /*
 ** Open the file indicated and write a log of all unfreed memory 
 ** allocations into that log.
 */
 void sqlite3Memsys3Dump(const char *zFilename){
@@ skipping 88 matching lines @@
      memsys3Size,
      memsys3Roundup,
      memsys3Init,
      memsys3Shutdown,
      0
   };
   return &mempoolMethods;
 }
 
 #endif /* SQLITE_ENABLE_MEMSYS3 */