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author | mmentovai@google.com <mmentovai@google.com@0039d316-1c4b-4281-b951-d872f2087c98> | 2008-09-02 18:20:34 +0000 |
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committer | mmentovai@google.com <mmentovai@google.com@0039d316-1c4b-4281-b951-d872f2087c98> | 2008-09-02 18:20:34 +0000 |
commit | b2e972938cc2a0478c33ff094c6f574f39c41997 (patch) | |
tree | cd985001cc7fd95db94ccda4bb5bede60d56f5ae /base/atomic_ref_count.h | |
parent | 844cbe038fca95d8a5406f895704076c402e4e29 (diff) | |
download | chromium_src-b2e972938cc2a0478c33ff094c6f574f39c41997.zip chromium_src-b2e972938cc2a0478c33ff094c6f574f39c41997.tar.gz chromium_src-b2e972938cc2a0478c33ff094c6f574f39c41997.tar.bz2 |
Set svn:eol-style = LF on files in base from which it is missing
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@1648 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'base/atomic_ref_count.h')
-rw-r--r-- | base/atomic_ref_count.h | 130 |
1 files changed, 65 insertions, 65 deletions
diff --git a/base/atomic_ref_count.h b/base/atomic_ref_count.h index 36690b5..af83572 100644 --- a/base/atomic_ref_count.h +++ b/base/atomic_ref_count.h @@ -1,65 +1,65 @@ -// Copyright (c) 2006-2008 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.
-
-// This is a low level implementation of atomic semantics for reference
-// counting. Please use base/ref_counted.h directly instead.
-
-#ifndef BASE_ATOMIC_REF_COUNT_H_
-#define BASE_ATOMIC_REF_COUNT_H_
-
-#include "base/atomicops.h"
-#include "base/basictypes.h"
-
-namespace base {
-
-typedef base::subtle::Atomic32 AtomicRefCount;
-
-// Increment a reference count by "increment", which must exceed 0.
-inline void AtomicRefCountIncN(volatile AtomicRefCount *ptr,
- AtomicRefCount increment) {
- base::subtle::NoBarrier_AtomicIncrement(ptr, increment);
-}
-
-// Decrement a reference count by "decrement", which must exceed 0,
-// and return whether the result is non-zero.
-// Insert barriers to ensure that state written before the reference count
-// became zero will be visible to a thread that has just made the count zero.
-inline bool AtomicRefCountDecN(volatile AtomicRefCount *ptr,
- AtomicRefCount decrement) {
- return base::subtle::Barrier_AtomicIncrement(ptr, -decrement) != 0;
-}
-
-// Increment a reference count by 1.
-inline void AtomicRefCountInc(volatile AtomicRefCount *ptr) {
- base::AtomicRefCountIncN(ptr, 1);
-}
-
-// Decrement a reference count by 1 and return whether the result is non-zero.
-// Insert barriers to ensure that state written before the reference count
-// became zero will be visible to a thread that has just made the count zero.
-inline bool AtomicRefCountDec(volatile AtomicRefCount *ptr) {
- return base::AtomicRefCountDecN(ptr, 1);
-}
-
-// Return whether the reference count is one. If the reference count is used
-// in the conventional way, a refrerence count of 1 implies that the current
-// thread owns the reference and no other thread shares it. This call performs
-// the test for a reference count of one, and performs the memory barrier
-// needed for the owning thread to act on the object, knowing that it has
-// exclusive access to the object.
-inline bool AtomicRefCountIsOne(volatile AtomicRefCount *ptr) {
- return base::subtle::Acquire_Load(ptr) == 1;
-}
-
-// Return whether the reference count is zero. With conventional object
-// referencing counting, the object will be destroyed, so the reference count
-// should never be zero. Hence this is generally used for a debug check.
-inline bool AtomicRefCountIsZero(volatile AtomicRefCount *ptr) {
- return base::subtle::Acquire_Load(ptr) == 0;
-}
-
-} // namespace base
-
-#endif // BASE_ATOMIC_REF_COUNT_H_
-
+// Copyright (c) 2006-2008 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. + +// This is a low level implementation of atomic semantics for reference +// counting. Please use base/ref_counted.h directly instead. + +#ifndef BASE_ATOMIC_REF_COUNT_H_ +#define BASE_ATOMIC_REF_COUNT_H_ + +#include "base/atomicops.h" +#include "base/basictypes.h" + +namespace base { + +typedef base::subtle::Atomic32 AtomicRefCount; + +// Increment a reference count by "increment", which must exceed 0. +inline void AtomicRefCountIncN(volatile AtomicRefCount *ptr, + AtomicRefCount increment) { + base::subtle::NoBarrier_AtomicIncrement(ptr, increment); +} + +// Decrement a reference count by "decrement", which must exceed 0, +// and return whether the result is non-zero. +// Insert barriers to ensure that state written before the reference count +// became zero will be visible to a thread that has just made the count zero. +inline bool AtomicRefCountDecN(volatile AtomicRefCount *ptr, + AtomicRefCount decrement) { + return base::subtle::Barrier_AtomicIncrement(ptr, -decrement) != 0; +} + +// Increment a reference count by 1. +inline void AtomicRefCountInc(volatile AtomicRefCount *ptr) { + base::AtomicRefCountIncN(ptr, 1); +} + +// Decrement a reference count by 1 and return whether the result is non-zero. +// Insert barriers to ensure that state written before the reference count +// became zero will be visible to a thread that has just made the count zero. +inline bool AtomicRefCountDec(volatile AtomicRefCount *ptr) { + return base::AtomicRefCountDecN(ptr, 1); +} + +// Return whether the reference count is one. If the reference count is used +// in the conventional way, a refrerence count of 1 implies that the current +// thread owns the reference and no other thread shares it. This call performs +// the test for a reference count of one, and performs the memory barrier +// needed for the owning thread to act on the object, knowing that it has +// exclusive access to the object. +inline bool AtomicRefCountIsOne(volatile AtomicRefCount *ptr) { + return base::subtle::Acquire_Load(ptr) == 1; +} + +// Return whether the reference count is zero. With conventional object +// referencing counting, the object will be destroyed, so the reference count +// should never be zero. Hence this is generally used for a debug check. +inline bool AtomicRefCountIsZero(volatile AtomicRefCount *ptr) { + return base::subtle::Acquire_Load(ptr) == 0; +} + +} // namespace base + +#endif // BASE_ATOMIC_REF_COUNT_H_ + |