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