[sql] Import reference version of SQLite 3.8.7.4.

third_party/sqlite/sqlite-src-3080704/src/test_server.c

 /*
 ** 2006 January 07
 **
 ** 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 455 matching lines @@
   pthread_t x;
   int rc;
   g.serverHalt = 0;
   rc = pthread_create(&x, 0, sqlite3_server, 0);
   if( rc==0 ){
     pthread_detach(x);
   }
 }
 
 /*
+** A wrapper around sqlite3_server() that decrements the int variable
+** pointed to by the first argument after the sqlite3_server() call
+** returns.
+*/
+static void *serverWrapper(void *pnDecr){
+  void *p = sqlite3_server(0);
+  (*(int*)pnDecr)--;
+  return p;
+}
+
+/*
+** This function is the similar to sqlite3_server_start(), except that
+** the integer pointed to by the first argument is decremented when
+** the server thread exits. 
+*/
+void sqlite3_server_start2(int *pnDecr){
+  pthread_t x;
+  int rc;
+  g.serverHalt = 0;
+  rc = pthread_create(&x, 0, serverWrapper, (void*)pnDecr);
+  if( rc==0 ){
+    pthread_detach(x);
+  }
+}
+
+/*
 ** If a server thread is running, then stop it.  If no server is
 ** running, this routine is effectively a no-op.
 **
 ** This routine waits until the server has actually stopped before
 ** returning.
 */
 void sqlite3_server_stop(void){
   g.serverHalt = 1;
   pthread_cond_broadcast(&g.serverWakeup);
   pthread_mutex_lock(&g.serverMutex);
   pthread_mutex_unlock(&g.serverMutex);
 }
 
 #endif /* SQLITE_OS_UNIX && SQLITE_THREADSAFE */
 #endif /* defined(SQLITE_SERVER) */