chrome/tools/crash_service/caps/process_singleton_win.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   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 <windows.h>
   6
   7 #include "chrome/tools/crash_service/caps/process_singleton_win.h"
   8
   9 namespace caps {
  10
  11 ProcessSingleton::ProcessSingleton() : mutex_(nullptr) {
  12   auto mutex = ::CreateMutex(nullptr, TRUE, L"CHROME.CAPS.V1");
  13   if (!mutex)
  14     return;
  15   if (::GetLastError() == ERROR_ALREADY_EXISTS) {
  16     ::CloseHandle(mutex);
  17     return;
  18   }
  19   // We are now the single instance.
  20   mutex_ = mutex;
  21 }
  22
  23 ProcessSingleton::~ProcessSingleton() {
  24   if (mutex_)
  25     ::CloseHandle(mutex_);
  26 }
  27
  28 }  // namespace caps
  29