third_party/WebKit/public/platform/WebTaskRunner.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef WebTaskRunner_h
   6 #define WebTaskRunner_h
   7
   8 #include "WebCommon.h"
   9
  10 #ifdef INSIDE_BLINK
  11 #include "wtf/Functional.h"
  12 #endif
  13
  14 namespace blink {
  15
  16 class WebTraceLocation;
  17
  18 // The blink representation of a chromium SingleThreadTaskRunner.
  19 class BLINK_PLATFORM_EXPORT WebTaskRunner {
  20 public:
  21     virtual ~WebTaskRunner() {}
  22
  23     class BLINK_PLATFORM_EXPORT Task {
  24     public:
  25         virtual ~Task() { }
  26         virtual void run() = 0;
  27     };
  28
  29     // Schedule a task to be run on the the associated WebThread.
  30     // Takes ownership of |Task|. Can be called from any thread.
  31     virtual void postTask(const WebTraceLocation&, Task*) {}
  32
  33     // Schedule a task to be run after |delayMs| on the the associated WebThread.
  34     // Takes ownership of |Task|. Can be called from any thread.
  35     // TODO(alexclarke): Remove this when possible.
  36     virtual void postDelayedTask(const WebTraceLocation&, Task*, long long delayMs) {}
  37
  38     // Schedule a task to be run after |delayMs| on the the associated WebThread.
  39     // Takes ownership of |Task|. Can be called from any thread.
  40     virtual void postDelayedTask(const WebTraceLocation&, Task*, double delayMs) {}
  41
  42 #ifdef INSIDE_BLINK
  43     // Helpers for posting bound functions as tasks.
  44     typedef Function<void()> ClosureTask;
  45
  46     void postTask(const WebTraceLocation&, PassOwnPtr<ClosureTask>);
  47     // TODO(alexclarke): Remove this when possible.
  48     void postDelayedTask(const WebTraceLocation&, PassOwnPtr<ClosureTask>, long long delayMs);
  49     void postDelayedTask(const WebTraceLocation&, PassOwnPtr<ClosureTask>, double delayMs);
  50 #endif
  51 };
  52
  53 } // namespace blink
  54
  55 #endif // WebTaskRunner_h