149 lines
5.4 KiB
C++
149 lines
5.4 KiB
C++
// Copyright (c) 2013 Marshall A. Greenblatt. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the name Chromium Embedded
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// Framework nor the names of its contributors may be used to endorse
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// or promote products derived from this software without specific prior
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// written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// ---------------------------------------------------------------------------
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//
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// The contents of this file must follow a specific format in order to
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// support the CEF translator tool. See the translator.README.txt file in the
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// tools directory for more information.
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//
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#ifndef CEF_INCLUDE_CEF_TASK_H_
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#define CEF_INCLUDE_CEF_TASK_H_
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#include "include/cef_base.h"
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typedef cef_thread_id_t CefThreadId;
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///
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/// Implement this interface for asynchronous task execution. If the task is
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/// posted successfully and if the associated message loop is still running then
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/// the Execute() method will be called on the target thread. If the task fails
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/// to post then the task object may be destroyed on the source thread instead
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/// of the target thread. For this reason be cautious when performing work in
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/// the task object destructor.
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///
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/*--cef(source=client,no_debugct_check)--*/
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class CefTask : public virtual CefBaseRefCounted {
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public:
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///
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/// Method that will be executed on the target thread.
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///
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/*--cef()--*/
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virtual void Execute() = 0;
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};
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///
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/// Class that asynchronously executes tasks on the associated thread. It is
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/// safe to call the methods of this class on any thread.
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///
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/// CEF maintains multiple internal threads that are used for handling different
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/// types of tasks in different processes. The cef_thread_id_t definitions in
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/// cef_types.h list the common CEF threads. Task runners are also available for
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/// other CEF threads as appropriate (for example, V8 WebWorker threads).
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///
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/*--cef(source=library)--*/
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class CefTaskRunner : public virtual CefBaseRefCounted {
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public:
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///
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/// Returns the task runner for the current thread. Only CEF threads will have
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/// task runners. An empty reference will be returned if this method is called
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/// on an invalid thread.
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///
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/*--cef()--*/
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static CefRefPtr<CefTaskRunner> GetForCurrentThread();
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///
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/// Returns the task runner for the specified CEF thread.
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///
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/*--cef()--*/
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static CefRefPtr<CefTaskRunner> GetForThread(CefThreadId threadId);
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///
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/// Returns true if this object is pointing to the same task runner as |that|
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/// object.
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///
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/*--cef()--*/
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virtual bool IsSame(CefRefPtr<CefTaskRunner> that) = 0;
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///
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/// Returns true if this task runner belongs to the current thread.
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///
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/*--cef()--*/
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virtual bool BelongsToCurrentThread() = 0;
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///
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/// Returns true if this task runner is for the specified CEF thread.
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///
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/*--cef()--*/
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virtual bool BelongsToThread(CefThreadId threadId) = 0;
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///
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/// Post a task for execution on the thread associated with this task runner.
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/// Execution will occur asynchronously.
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///
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/*--cef()--*/
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virtual bool PostTask(CefRefPtr<CefTask> task) = 0;
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///
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/// Post a task for delayed execution on the thread associated with this task
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/// runner. Execution will occur asynchronously. Delayed tasks are not
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/// supported on V8 WebWorker threads and will be executed without the
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/// specified delay.
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///
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/*--cef()--*/
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virtual bool PostDelayedTask(CefRefPtr<CefTask> task, int64 delay_ms) = 0;
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};
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///
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/// Returns true if called on the specified thread. Equivalent to using
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/// CefTaskRunner::GetForThread(threadId)->BelongsToCurrentThread().
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///
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/*--cef()--*/
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bool CefCurrentlyOn(CefThreadId threadId);
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///
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/// Post a task for execution on the specified thread. Equivalent to
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/// using CefTaskRunner::GetForThread(threadId)->PostTask(task).
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///
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/*--cef()--*/
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bool CefPostTask(CefThreadId threadId, CefRefPtr<CefTask> task);
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///
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/// Post a task for delayed execution on the specified thread. Equivalent to
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/// using CefTaskRunner::GetForThread(threadId)->PostDelayedTask(task,
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/// delay_ms).
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///
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/*--cef()--*/
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bool CefPostDelayedTask(CefThreadId threadId,
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CefRefPtr<CefTask> task,
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int64 delay_ms);
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#endif // CEF_INCLUDE_CEF_TASK_H_
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