From baeb22f54fafa2b8394a7ccd74536ed7ccc23c34 Mon Sep 17 00:00:00 2001 From: "timurrrr@chromium.org" Date: Thu, 3 Dec 2009 21:11:34 +0000 Subject: Rename AtomicFlag to CancelFlag, change its semantics a bit Review URL: http://codereview.chromium.org/454025 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@33723 0039d316-1c4b-4281-b951-d872f2087c98 --- base/cancellation_flag.h | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 base/cancellation_flag.h (limited to 'base/cancellation_flag.h') diff --git a/base/cancellation_flag.h b/base/cancellation_flag.h new file mode 100644 index 0000000..b9c045d --- /dev/null +++ b/base/cancellation_flag.h @@ -0,0 +1,42 @@ +// Copyright (c) 2009 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_CANCELLATION_FLAG_H_ +#define BASE_CANCELLATION_FLAG_H_ + +#include "base/atomicops.h" +#include "base/platform_thread.h" + +namespace base { + +// CancellationFlag allows one thread to cancel jobs executed on some worker +// thread. Calling Set() from one thread and IsSet() from a number of threads +// is thread-safe. +// +// This class IS NOT intended for synchronization between threads. +class CancellationFlag { + public: + CancellationFlag() : flag_(false) { +#if !defined(NDEBUG) + set_on_ = PlatformThread::CurrentId(); +#endif + } + ~CancellationFlag() {} + + // Set the flag. May only be called on the thread which owns the object. + void Set(); + bool IsSet() const; // Returns true iff the flag was set. + + private: + base::subtle::Atomic32 flag_; +#if !defined(NDEBUG) + PlatformThreadId set_on_; +#endif + + DISALLOW_COPY_AND_ASSIGN(CancellationFlag); +}; + +} // namespace base + +#endif // BASE_CANCELLATION_FLAG_H_ -- cgit v1.1