diff options
Diffstat (limited to 'security/sandbox/chromium/base/sequenced_task_runner_helpers.h')
-rw-r--r-- | security/sandbox/chromium/base/sequenced_task_runner_helpers.h | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/security/sandbox/chromium/base/sequenced_task_runner_helpers.h b/security/sandbox/chromium/base/sequenced_task_runner_helpers.h deleted file mode 100644 index 7980b46b6..000000000 --- a/security/sandbox/chromium/base/sequenced_task_runner_helpers.h +++ /dev/null @@ -1,113 +0,0 @@ -// Copyright (c) 2012 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_SEQUENCED_TASK_RUNNER_HELPERS_H_ -#define BASE_SEQUENCED_TASK_RUNNER_HELPERS_H_ - -#include "base/debug/alias.h" -#include "base/macros.h" - -// TODO(akalin): Investigate whether it's possible to just have -// SequencedTaskRunner use these helpers (instead of MessageLoop). -// Then we can just move these to sequenced_task_runner.h. - -namespace tracked_objects { -class Location; -} - -namespace base { - -namespace subtle { -template <class T, class R> class DeleteHelperInternal; -template <class T, class R> class ReleaseHelperInternal; -} - -// Template helpers which use function indirection to erase T from the -// function signature while still remembering it so we can call the -// correct destructor/release function. -// -// We use this trick so we don't need to include bind.h in a header -// file like sequenced_task_runner.h. We also wrap the helpers in a -// templated class to make it easier for users of DeleteSoon to -// declare the helper as a friend. -template <class T> -class DeleteHelper { - private: - template <class T2, class R> friend class subtle::DeleteHelperInternal; - - static void DoDelete(const void* object) { - delete reinterpret_cast<const T*>(object); - } - - DISALLOW_COPY_AND_ASSIGN(DeleteHelper); -}; - -template <class T> -class ReleaseHelper { - private: - template <class T2, class R> friend class subtle::ReleaseHelperInternal; - - static void DoRelease(const void* object) { - reinterpret_cast<const T*>(object)->Release(); - } - - DISALLOW_COPY_AND_ASSIGN(ReleaseHelper); -}; - -namespace subtle { - -// An internal SequencedTaskRunner-like class helper for DeleteHelper -// and ReleaseHelper. We don't want to expose the Do*() functions -// directly directly since the void* argument makes it possible to -// pass/ an object of the wrong type to delete. Instead, we force -// callers to go through these internal helpers for type -// safety. SequencedTaskRunner-like classes which expose DeleteSoon or -// ReleaseSoon methods should friend the appropriate helper and -// implement a corresponding *Internal method with the following -// signature: -// -// bool(const tracked_objects::Location&, -// void(*function)(const void*), -// void* object) -// -// An implementation of this function should simply create a -// base::Closure from (function, object) and return the result of -// posting the task. -template <class T, class ReturnType> -class DeleteHelperInternal { - public: - template <class SequencedTaskRunnerType> - static ReturnType DeleteViaSequencedTaskRunner( - SequencedTaskRunnerType* sequenced_task_runner, - const tracked_objects::Location& from_here, - const T* object) { - return sequenced_task_runner->DeleteSoonInternal( - from_here, &DeleteHelper<T>::DoDelete, object); - } - - private: - DISALLOW_COPY_AND_ASSIGN(DeleteHelperInternal); -}; - -template <class T, class ReturnType> -class ReleaseHelperInternal { - public: - template <class SequencedTaskRunnerType> - static ReturnType ReleaseViaSequencedTaskRunner( - SequencedTaskRunnerType* sequenced_task_runner, - const tracked_objects::Location& from_here, - const T* object) { - return sequenced_task_runner->ReleaseSoonInternal( - from_here, &ReleaseHelper<T>::DoRelease, object); - } - - private: - DISALLOW_COPY_AND_ASSIGN(ReleaseHelperInternal); -}; - -} // namespace subtle - -} // namespace base - -#endif // BASE_SEQUENCED_TASK_RUNNER_HELPERS_H_ |