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Diffstat (limited to 'chromium/media/base/bind_to_current_loop.h')
| -rw-r--r-- | chromium/media/base/bind_to_current_loop.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/chromium/media/base/bind_to_current_loop.h b/chromium/media/base/bind_to_current_loop.h new file mode 100644 index 00000000000..6461b1c9af9 --- /dev/null +++ b/chromium/media/base/bind_to_current_loop.h @@ -0,0 +1,162 @@ +// This file was GENERATED by command: +// pump.py bind_to_current_loop.h.pump +// DO NOT EDIT BY HAND!!! + + +// 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 MEDIA_BASE_BIND_TO_CURRENT_LOOP_H_ +#define MEDIA_BASE_BIND_TO_CURRENT_LOOP_H_ + +#include "base/bind.h" +#include "base/location.h" +#include "base/message_loop/message_loop_proxy.h" +#include "base/single_thread_task_runner.h" + +// This is a helper utility for base::Bind()ing callbacks to the current +// MessageLoop. The typical use is when |a| (of class |A|) wants to hand a +// callback such as base::Bind(&A::AMethod, a) to |b|, but needs to ensure that +// when |b| executes the callback, it does so on |a|'s current MessageLoop. +// +// Typical usage: request to be called back on the current thread: +// other->StartAsyncProcessAndCallMeBack( +// media::BindToCurrentLoop(base::Bind(&MyClass::MyMethod, this))); +// +// Note that like base::Bind(), BindToCurrentLoop() can't bind non-constant +// references, and that *unlike* base::Bind(), BindToCurrentLoop() makes copies +// of its arguments, and thus can't be used with arrays. + +namespace media { + +// Mimic base::internal::CallbackForward, replacing p.Pass() with +// base::Passed(&p) to account for the extra layer of indirection. +namespace internal { +template <typename T> +T& TrampolineForward(T& t) { return t; } + +template <typename T, typename R> +base::internal::PassedWrapper<scoped_ptr<T, R> > TrampolineForward( + scoped_ptr<T, R>& p) { return base::Passed(&p); } + +template <typename T> +base::internal::PassedWrapper<ScopedVector<T> > TrampolineForward( + ScopedVector<T>& p) { return base::Passed(&p); } + +template <typename T> struct TrampolineHelper; + +template <> +struct TrampolineHelper<void()> { + static void Run( + const scoped_refptr<base::SingleThreadTaskRunner>& task_runner, + const base::Callback<void()>& cb) { + task_runner->PostTask(FROM_HERE, base::Bind(cb)); + } +}; + + +template <typename A1> +struct TrampolineHelper<void(A1)> { + static void Run( + const scoped_refptr<base::SingleThreadTaskRunner>& task_runner, + const base::Callback<void(A1)>& cb, A1 a1) { + task_runner->PostTask(FROM_HERE, base::Bind(cb, + internal::TrampolineForward(a1))); + } +}; + + +template <typename A1, typename A2> +struct TrampolineHelper<void(A1, A2)> { + static void Run( + const scoped_refptr<base::SingleThreadTaskRunner>& task_runner, + const base::Callback<void(A1, A2)>& cb, A1 a1, A2 a2) { + task_runner->PostTask(FROM_HERE, base::Bind(cb, + internal::TrampolineForward(a1), internal::TrampolineForward(a2))); + } +}; + + +template <typename A1, typename A2, typename A3> +struct TrampolineHelper<void(A1, A2, A3)> { + static void Run( + const scoped_refptr<base::SingleThreadTaskRunner>& task_runner, + const base::Callback<void(A1, A2, A3)>& cb, A1 a1, A2 a2, A3 a3) { + task_runner->PostTask(FROM_HERE, base::Bind(cb, + internal::TrampolineForward(a1), internal::TrampolineForward(a2), + internal::TrampolineForward(a3))); + } +}; + + +template <typename A1, typename A2, typename A3, typename A4> +struct TrampolineHelper<void(A1, A2, A3, A4)> { + static void Run( + const scoped_refptr<base::SingleThreadTaskRunner>& task_runner, + const base::Callback<void(A1, A2, A3, A4)>& cb, A1 a1, A2 a2, A3 a3, + A4 a4) { + task_runner->PostTask(FROM_HERE, base::Bind(cb, + internal::TrampolineForward(a1), internal::TrampolineForward(a2), + internal::TrampolineForward(a3), internal::TrampolineForward(a4))); + } +}; + + +template <typename A1, typename A2, typename A3, typename A4, typename A5> +struct TrampolineHelper<void(A1, A2, A3, A4, A5)> { + static void Run( + const scoped_refptr<base::SingleThreadTaskRunner>& task_runner, + const base::Callback<void(A1, A2, A3, A4, A5)>& cb, A1 a1, A2 a2, A3 a3, + A4 a4, A5 a5) { + task_runner->PostTask(FROM_HERE, base::Bind(cb, + internal::TrampolineForward(a1), internal::TrampolineForward(a2), + internal::TrampolineForward(a3), internal::TrampolineForward(a4), + internal::TrampolineForward(a5))); + } +}; + + +template <typename A1, typename A2, typename A3, typename A4, typename A5, + typename A6> +struct TrampolineHelper<void(A1, A2, A3, A4, A5, A6)> { + static void Run( + const scoped_refptr<base::SingleThreadTaskRunner>& task_runner, + const base::Callback<void(A1, A2, A3, A4, A5, A6)>& cb, A1 a1, A2 a2, + A3 a3, A4 a4, A5 a5, A6 a6) { + task_runner->PostTask(FROM_HERE, base::Bind(cb, + internal::TrampolineForward(a1), internal::TrampolineForward(a2), + internal::TrampolineForward(a3), internal::TrampolineForward(a4), + internal::TrampolineForward(a5), internal::TrampolineForward(a6))); + } +}; + + +template <typename A1, typename A2, typename A3, typename A4, typename A5, + typename A6, typename A7> +struct TrampolineHelper<void(A1, A2, A3, A4, A5, A6, A7)> { + static void Run( + const scoped_refptr<base::SingleThreadTaskRunner>& task_runner, + const base::Callback<void(A1, A2, A3, A4, A5, A6, A7)>& cb, A1 a1, A2 a2, + A3 a3, A4 a4, A5 a5, A6 a6, A7 a7) { + task_runner->PostTask(FROM_HERE, base::Bind(cb, + internal::TrampolineForward(a1), internal::TrampolineForward(a2), + internal::TrampolineForward(a3), internal::TrampolineForward(a4), + internal::TrampolineForward(a5), internal::TrampolineForward(a6), + internal::TrampolineForward(a7))); + } +}; + + +} // namespace internal + +template<typename T> +static base::Callback<T> BindToCurrentLoop( + const base::Callback<T>& cb) { + return base::Bind(&internal::TrampolineHelper<T>::Run, + base::MessageLoopProxy::current(), cb); +} + +} // namespace media + +#endif // MEDIA_BASE_BIND_TO_CURRENT_LOOP_H_ |