v8/include/libplatform/libplatform.h
Clemens Backes 739bee71fa [api] Use C++14 [[deprecated]] attribute
Since C++14, there is a spec'ed attribute for deprecation of methods,
functions, types, aliases or anything else.
This CL switches from the GCC __attribute__ to this standard attribute.
This allows to use the V8_DEPRECATED and V8_DEPRECATE_SOON macros on
anything where the standard attribute can be used (including {using}
statements that were not working before). It also avoids the need to
nest the whole declaration in the macro, making the code more readable.

R=adamk@chromium.org

Bug: v8:9810
Change-Id: I7adab7694af75423fb31ade2fc982dbf9c9bc699
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1847361
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64174}
2019-10-09 07:31:28 +00:00

84 lines
3.0 KiB
C++

// Copyright 2014 the V8 project 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 V8_LIBPLATFORM_LIBPLATFORM_H_
#define V8_LIBPLATFORM_LIBPLATFORM_H_
#include <memory>
#include "libplatform/libplatform-export.h"
#include "libplatform/v8-tracing.h"
#include "v8-platform.h" // NOLINT(build/include)
#include "v8config.h" // NOLINT(build/include)
namespace v8 {
namespace platform {
enum class IdleTaskSupport { kDisabled, kEnabled };
enum class InProcessStackDumping { kDisabled, kEnabled };
enum class MessageLoopBehavior : bool {
kDoNotWait = false,
kWaitForWork = true
};
/**
* Returns a new instance of the default v8::Platform implementation.
*
* The caller will take ownership of the returned pointer. |thread_pool_size|
* is the number of worker threads to allocate for background jobs. If a value
* of zero is passed, a suitable default based on the current number of
* processors online will be chosen.
* If |idle_task_support| is enabled then the platform will accept idle
* tasks (IdleTasksEnabled will return true) and will rely on the embedder
* calling v8::platform::RunIdleTasks to process the idle tasks.
* If |tracing_controller| is nullptr, the default platform will create a
* v8::platform::TracingController instance and use it.
*/
V8_PLATFORM_EXPORT std::unique_ptr<v8::Platform> NewDefaultPlatform(
int thread_pool_size = 0,
IdleTaskSupport idle_task_support = IdleTaskSupport::kDisabled,
InProcessStackDumping in_process_stack_dumping =
InProcessStackDumping::kDisabled,
std::unique_ptr<v8::TracingController> tracing_controller = {});
/**
* Pumps the message loop for the given isolate.
*
* The caller has to make sure that this is called from the right thread.
* Returns true if a task was executed, and false otherwise. Unless requested
* through the |behavior| parameter, this call does not block if no task is
* pending. The |platform| has to be created using |NewDefaultPlatform|.
*/
V8_PLATFORM_EXPORT bool PumpMessageLoop(
v8::Platform* platform, v8::Isolate* isolate,
MessageLoopBehavior behavior = MessageLoopBehavior::kDoNotWait);
/**
* Runs pending idle tasks for at most |idle_time_in_seconds| seconds.
*
* The caller has to make sure that this is called from the right thread.
* This call does not block if no task is pending. The |platform| has to be
* created using |NewDefaultPlatform|.
*/
V8_PLATFORM_EXPORT void RunIdleTasks(v8::Platform* platform,
v8::Isolate* isolate,
double idle_time_in_seconds);
/**
* Attempts to set the tracing controller for the given platform.
*
* The |platform| has to be created using |NewDefaultPlatform|.
*
*/
V8_DEPRECATE_SOON("Access the DefaultPlatform directly")
V8_PLATFORM_EXPORT void SetTracingController(
v8::Platform* platform,
v8::platform::tracing::TracingController* tracing_controller);
} // namespace platform
} // namespace v8
#endif // V8_LIBPLATFORM_LIBPLATFORM_H_