93 lines
1.9 KiB
C++
93 lines
1.9 KiB
C++
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#ifndef BASE_MAC_SCOPED_BLOCK_H_
|
|
#define BASE_MAC_SCOPED_BLOCK_H_
|
|
|
|
#include <Block.h>
|
|
|
|
#include "base/basictypes.h"
|
|
#include "base/compiler_specific.h"
|
|
#include "base/memory/scoped_policy.h"
|
|
|
|
namespace base {
|
|
namespace mac {
|
|
|
|
// ScopedBlock<> is patterned after ScopedCFTypeRef<>, but uses Block_copy() and
|
|
// Block_release() instead of CFRetain() and CFRelease().
|
|
|
|
template<typename B>
|
|
class ScopedBlock {
|
|
public:
|
|
explicit ScopedBlock(
|
|
B block = NULL,
|
|
base::scoped_policy::OwnershipPolicy policy = base::scoped_policy::ASSUME)
|
|
: block_(block) {
|
|
if (block_ && policy == base::scoped_policy::RETAIN)
|
|
block_ = Block_copy(block);
|
|
}
|
|
|
|
ScopedBlock(const ScopedBlock<B>& that)
|
|
: block_(that.block_) {
|
|
if (block_)
|
|
block_ = Block_copy(block_);
|
|
}
|
|
|
|
~ScopedBlock() {
|
|
if (block_)
|
|
Block_release(block_);
|
|
}
|
|
|
|
ScopedBlock& operator=(const ScopedBlock<B>& that) {
|
|
reset(that.get(), base::scoped_policy::RETAIN);
|
|
return *this;
|
|
}
|
|
|
|
void reset(B block = NULL,
|
|
base::scoped_policy::OwnershipPolicy policy =
|
|
base::scoped_policy::ASSUME) {
|
|
if (block && policy == base::scoped_policy::RETAIN)
|
|
block = Block_copy(block);
|
|
if (block_)
|
|
Block_release(block_);
|
|
block_ = block;
|
|
}
|
|
|
|
bool operator==(B that) const {
|
|
return block_ == that;
|
|
}
|
|
|
|
bool operator!=(B that) const {
|
|
return block_ != that;
|
|
}
|
|
|
|
operator B() const {
|
|
return block_;
|
|
}
|
|
|
|
B get() const {
|
|
return block_;
|
|
}
|
|
|
|
void swap(ScopedBlock& that) {
|
|
B temp = that.block_;
|
|
that.block_ = block_;
|
|
block_ = temp;
|
|
}
|
|
|
|
B release() WARN_UNUSED_RESULT {
|
|
B temp = block_;
|
|
block_ = NULL;
|
|
return temp;
|
|
}
|
|
|
|
private:
|
|
B block_;
|
|
};
|
|
|
|
} // namespace mac
|
|
} // namespace base
|
|
|
|
#endif // BASE_MAC_SCOPED_BLOCK_H_
|