base/mac/scoped_launch_data.h

   1 // Copyright (c) 2012 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 #ifndef BASE_MAC_SCOPED_LAUNCH_DATA_H_
   6 #define BASE_MAC_SCOPED_LAUNCH_DATA_H_
   7
   8 #include <launch.h>
   9
  10 #include <algorithm>
  11
  12 #include "base/basictypes.h"
  13 #include "base/compiler_specific.h"
  14
  15 namespace base {
  16 namespace mac {
  17
  18 // Just like scoped_ptr<> but for launch_data_t.
  19 class ScopedLaunchData {
  20  public:
  21   typedef launch_data_t element_type;
  22
  23   explicit ScopedLaunchData(launch_data_t object = NULL)
  24       : object_(object) {
  25   }
  26
  27   ~ScopedLaunchData() {
  28     if (object_)
  29       launch_data_free(object_);
  30   }
  31
  32   void reset(launch_data_t object = NULL) {
  33     if (object != object_) {
  34       if (object_)
  35         launch_data_free(object_);
  36       object_ = object;
  37     }
  38   }
  39
  40   bool operator==(launch_data_t that) const {
  41     return object_ == that;
  42   }
  43
  44   bool operator!=(launch_data_t that) const {
  45     return object_ != that;
  46   }
  47
  48   operator launch_data_t() const {
  49     return object_;
  50   }
  51
  52   launch_data_t get() const {
  53     return object_;
  54   }
  55
  56   void swap(ScopedLaunchData& that) {
  57     std::swap(object_, that.object_);
  58   }
  59
  60   launch_data_t release() WARN_UNUSED_RESULT {
  61     launch_data_t temp = object_;
  62     object_ = NULL;
  63     return temp;
  64   }
  65
  66  private:
  67   launch_data_t object_;
  68
  69   DISALLOW_COPY_AND_ASSIGN(ScopedLaunchData);
  70 };
  71
  72 }  // namespace mac
  73 }  // namespace base
  74
  75 #endif  // BASE_MAC_SCOPED_LAUNCH_DATA_H_