| Index: third_party/WebKit/public/platform/functional/WebFunction.h
|
| diff --git a/third_party/WebKit/public/platform/functional/WebFunction.h b/third_party/WebKit/public/platform/functional/WebFunction.h
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..7eb4a226fffed6aac24f50aa00465b3efaa43cdc
|
| --- /dev/null
|
| +++ b/third_party/WebKit/public/platform/functional/WebFunction.h
|
| @@ -0,0 +1,101 @@
|
| +// Copyright 2016 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 WebFunction_h
|
| +#define WebFunction_h
|
| +
|
| +#include "base/bind.h"
|
| +#include "base/callback.h"
|
| +#include "base/callback_helpers.h"
|
| +#include "base/macros.h"
|
| +#include "base/memory/ptr_util.h"
|
| +#include "public/platform/WebCommon.h"
|
| +
|
| +#include <memory>
|
| +#include <utility>
|
| +
|
| +#if BLINK_IMPLEMENTATION
|
| +#include "wtf/Functional.h"
|
| +#else
|
| +#include "base/logging.h"
|
| +#endif
|
| +
|
| +namespace blink {
|
| +
|
| +template <typename...>
|
| +class WebFunction;
|
| +
|
| +// Conversion from WTF closures to base closures to pass a callback out of
|
| +// blink.
|
| +template <typename R, typename... Args>
|
| +class WebFunction<R(Args...)> {
|
| +private:
|
| +#if BLINK_IMPLEMENTATION
|
| + using WTFFunction = WTF::Function<R(Args...), WTF::SameThreadAffinity>;
|
| +#endif
|
| +
|
| +public:
|
| +#if BLINK_IMPLEMENTATION
|
| + WebFunction()
|
| + {
|
| + }
|
| +
|
| + explicit WebFunction(PassOwnPtr<WTFFunction> c)
|
| + {
|
| + // Make the base::Callback own the WTF::Function, allowing it to call the
|
| + // WTF::Function more than once but destroy it when the base::Callback is
|
| + // destroyed.
|
| + m_callback = base::Bind(&RunWTFFunction<R, Args...>, base::Owned(c.leakPtr()));
|
| + }
|
| +#endif
|
| +
|
| + WebFunction(WebFunction&& other)
|
| + {
|
| + *this = std::move(other);
|
| + }
|
| + WebFunction& operator=(WebFunction&& other)
|
| + {
|
| +#if DCHECK_IS_ON()
|
| + m_haveClosure = other.m_haveClosure;
|
| + other.m_haveClosure = false;
|
| +#endif
|
| + m_callback = std::move(other.m_callback);
|
| + return *this;
|
| + }
|
| +
|
| +#if !BLINK_IMPLEMENTATION
|
| + // TODO(danakj): This could be rvalue-ref-qualified.
|
| + base::Callback<R(Args...)> TakeBaseCallback()
|
| + {
|
| +#if DCHECK_IS_ON()
|
| + // Don't call this more than once!
|
| + DCHECK(m_haveClosure);
|
| + m_haveClosure = false;
|
| +#endif
|
| + return std::move(m_callback);
|
| + }
|
| +#endif
|
| +
|
| +private:
|
| +#if BLINK_IMPLEMENTATION
|
| + template <typename RunR, typename... RunArgs>
|
| + static RunR RunWTFFunction(WTFFunction* c, RunArgs... args)
|
| + {
|
| + return (*c)(std::forward<RunArgs>(args)...);
|
| + }
|
| +#endif
|
| +
|
| +#if DCHECK_IS_ON()
|
| + bool m_haveClosure = true;
|
| +#endif
|
| + base::Callback<R(Args...)> m_callback;
|
| +
|
| + DISALLOW_COPY_AND_ASSIGN(WebFunction);
|
| +};
|
| +
|
| +using WebClosure = WebFunction<void()>;
|
| +
|
| +} // namespace blink
|
| +
|
| +#endif // WebClosure_h
|
|
|