sql/initialization.cc

   1 // Copyright 2018 The Chromium Authors
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "sql/initialization.h"
   6
   7 #include "base/no_destructor.h"
   8 #include "base/synchronization/lock.h"
   9 #include "base/trace_event/trace_event.h"
  10 #include "third_party/sqlite/sqlite3.h"
  11
  12 namespace sql {
  13
  14 void EnsureSqliteInitialized() {
  15   // sqlite3_initialize() uses double-checked locking and thus can have
  16   // data races.
  17   static base::NoDestructor<base::Lock> sqlite_init_lock;
  18   base::AutoLock auto_lock(*sqlite_init_lock);
  19
  20   static bool first_call = true;
  21   if (first_call) {
  22     TRACE_EVENT0("sql", "EnsureSqliteInitialized");
  23     sqlite3_initialize();
  24     first_call = false;
  25   }
  26 }
  27
  28 }  // namespace sql