1 // Copyright (c) 2010 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_NSAUTORELEASE_POOL_H_ 6 #define BASE_MAC_SCOPED_NSAUTORELEASE_POOL_H_ 7 #pragma once 8 9 #include "base/basictypes.h" 10 11 #if defined(OS_MACOSX) 12 #if defined(__OBJC__) 13 @class NSAutoreleasePool; 14 #else // __OBJC__ 15 class NSAutoreleasePool; 16 #endif // __OBJC__ 17 #endif // OS_MACOSX 18 19 namespace base { 20 namespace mac { 21 22 // On the Mac, ScopedNSAutoreleasePool allocates an NSAutoreleasePool when 23 // instantiated and sends it a -drain message when destroyed. This allows an 24 // autorelease pool to be maintained in ordinary C++ code without bringing in 25 // any direct Objective-C dependency. 26 // 27 // On other platforms, ScopedNSAutoreleasePool is an empty object with no 28 // effects. This allows it to be used directly in cross-platform code without 29 // ugly #ifdefs. 30 class ScopedNSAutoreleasePool { 31 public: 32 #if !defined(OS_MACOSX) 33 ScopedNSAutoreleasePool() {} 34 void Recycle() { } 35 #else // OS_MACOSX 36 ScopedNSAutoreleasePool(); 37 ~ScopedNSAutoreleasePool(); 38 39 // Clear out the pool in case its position on the stack causes it to be 40 // alive for long periods of time (such as the entire length of the app). 41 // Only use then when you're certain the items currently in the pool are 42 // no longer needed. 43 void Recycle(); 44 private: 45 NSAutoreleasePool* autorelease_pool_; 46 #endif // OS_MACOSX 47 48 private: 49 DISALLOW_COPY_AND_ASSIGN(ScopedNSAutoreleasePool); 50 }; 51 52 } // namespace mac 53 } // namespace base 54 55 #endif // BASE_MAC_SCOPED_NSAUTORELEASE_POOL_H_ 56
