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80 lines
1.6 KiB
80 lines
1.6 KiB
3 years ago
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/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#include <Foundation/NSObject.h>
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#include <stdlib.h>
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@interface BufferContainer1 : NSObject
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@property char* buffer;
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@end
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@implementation BufferContainer1
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- (instancetype)init {
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_buffer = malloc(sizeof(char));
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return self;
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}
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- (void)dealloc {
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free(_buffer);
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}
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@end
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@interface BufferContainer2 : NSObject
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@property char* buffer;
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@end
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@implementation BufferContainer2
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- (instancetype)init {
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_buffer = malloc(sizeof(char));
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return self;
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}
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- (void)dealloc {
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}
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@end
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@interface Araii : NSObject
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@property BufferContainer1* container;
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@end
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@implementation Araii
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- (instancetype)init {
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_container = [[BufferContainer1 alloc] init];
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return self;
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}
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@end
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/* b goes out of scope, this would cause b->_container to be leaked,
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however, dealloc is called and _container is freed there, so no leak. */
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void memory_leak_raii_no_leak_ok() {
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BufferContainer1* b = [[BufferContainer1 alloc] init];
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}
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/* b goes out of scope, this causes b->_container to be leaked. Even though
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dealloc is called, _container is not freed there. */
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void memory_leak_raii_leak_bad() {
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BufferContainer2* b = [[BufferContainer2 alloc] init];
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}
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/* a goes out of scope, this causes a->_container->_buffer to be leaked.
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However, dealloc of Arrai is called which triggers dealloc of BufferContainer1
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to be called and _buffer is freed there, so no leak. */
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void memory_leak_raii_no_leak_in_object_tree_ok() {
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Araii* a = [[Araii alloc] init];
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}
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