Update sqlite to 3.7.3.

third_party/sqlite/src/src/test_async.c

 /*
 ** 2005 December 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.
 **
 *************************************************************************
 **
-** $Id: test_async.c,v 1.62 2009/04/28 13:01:09 drh Exp $
-**
 ** This file contains a binding of the asynchronous IO extension interface
 ** (defined in ext/async/sqlite3async.h) to Tcl.
 */
 
 #define TCL_THREADS 
 #include <tcl.h>
 
 #ifdef SQLITE_ENABLE_ASYNCIO
 
 #include "sqlite3async.h"
@@ skipping 54 matching lines @@
 ){
   sqlite3async_shutdown();
   return TCL_OK;
 }
 
 static Tcl_ThreadCreateType tclWriterThread(ClientData pIsStarted){
   Tcl_MutexLock(&testasync_g_writerMutex);
   *((int *)pIsStarted) = 1;
   sqlite3async_run();
   Tcl_MutexUnlock(&testasync_g_writerMutex);
+  Tcl_ExitThread(0);
   TCL_THREAD_CREATE_RETURN;
 }
 
 /*
 ** sqlite3async_start
 **
 ** Start a new writer thread.
 */
 static int testAsyncStart(
   void * clientData,
@@ skipping 124 matching lines @@
 }
 
 #endif  /* SQLITE_ENABLE_ASYNCIO */
 
 /*
 ** This routine registers the custom TCL commands defined in this
 ** module.  This should be the only procedure visible from outside
 ** of this module.
 */
 int Sqlitetestasync_Init(Tcl_Interp *interp){
-#if SQLITE_ENABLE_ASYNCIO
+#ifdef SQLITE_ENABLE_ASYNCIO
   Tcl_CreateObjCommand(interp,"sqlite3async_start",testAsyncStart,0,0);
   Tcl_CreateObjCommand(interp,"sqlite3async_wait",testAsyncWait,0,0);
 
   Tcl_CreateObjCommand(interp,"sqlite3async_control",testAsyncControl,0,0);
   Tcl_CreateObjCommand(interp,"sqlite3async_initialize",testAsyncInit,0,0);
   Tcl_CreateObjCommand(interp,"sqlite3async_shutdown",testAsyncShutdown,0,0);
 #endif  /* SQLITE_ENABLE_ASYNCIO */
   return TCL_OK;
 }