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1 /*
2  *  Copyright 2008 The WebRTC Project Authors. All rights reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 // Automatically initialize and and free an autoreleasepool. Never allocate
12 // an instance of this class using "new" - that will result in a compile-time
13 // error. Only use it as a stack object.
14 //
15 // Note: NSAutoreleasePool docs say that you should not normally need to
16 // declare an NSAutoreleasePool as a member of an object - but there's nothing
17 // that indicates it will be a problem, as long as the stack lifetime of the
18 // pool exactly matches the stack lifetime of the object.
19 
20 #ifndef WEBRTC_BASE_SCOPED_AUTORELEASE_POOL_H__
21 #define WEBRTC_BASE_SCOPED_AUTORELEASE_POOL_H__
22 
23 #if defined(WEBRTC_MAC)
24 
25 #include "webrtc/base/common.h"
26 
27 // This header may be included from Obj-C files or C++ files.
28 #ifdef __OBJC__
29 @class NSAutoreleasePool;
30 #else
31 class NSAutoreleasePool;
32 #endif
33 
34 namespace rtc {
35 
36 class ScopedAutoreleasePool {
37  public:
38   ScopedAutoreleasePool();
39   ~ScopedAutoreleasePool();
40 
41  private:
42   // Declaring private overrides of new and delete here enforces the "only use
43   // as a stack object" discipline.
44   //
45   // Note: new is declared as "throw()" to get around a gcc warning about new
46   // returning NULL, but this method will never get called and therefore will
47   // never actually throw any exception.
new(size_t size)48   void* operator new(size_t size) throw() { return NULL; }
delete(void * ptr)49   void operator delete (void* ptr) {}
50 
51   NSAutoreleasePool* pool_;
52 
53   RTC_DISALLOW_COPY_AND_ASSIGN(ScopedAutoreleasePool);
54 };
55 
56 }  // namespace rtc
57 
58 #endif  // WEBRTC_MAC
59 #endif  // WEBRTC_BASE_SCOPED_AUTORELEASE_POOL_H__
60