dom/canvas/WebGLSync.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef WEBGL_SYNC_H_
   7 #define WEBGL_SYNC_H_
   8
   9 #include "WebGLObjectModel.h"
  10
  11 namespace mozilla {
  12 namespace webgl {
  13 class AvailabilityRunnable;
  14
  15 struct Task {
  16   virtual ~Task() = default;
  17   virtual void operator()() const = 0;
  18 };
  19
  20 template <class F>
  21 struct FnTask : public Task {
  22   const F fn;
  23
  24   explicit FnTask(F&& fn) : fn(std::move(fn)) {}
  25
  26   virtual void operator()() const override { fn(); }
  27 };
  28 }  // namespace webgl
  29
  30 enum class ClientWaitSyncResult : GLenum {
  31   WAIT_FAILED = LOCAL_GL_WAIT_FAILED,
  32   TIMEOUT_EXPIRED = LOCAL_GL_TIMEOUT_EXPIRED,
  33   CONDITION_SATISFIED = LOCAL_GL_CONDITION_SATISFIED,
  34   ALREADY_SIGNALED = LOCAL_GL_ALREADY_SIGNALED,
  35 };
  36
  37 class WebGLSync final : public WebGLContextBoundObject, public SupportsWeakPtr {
  38   friend class WebGL2Context;
  39   friend class webgl::AvailabilityRunnable;
  40
  41   MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(WebGLSync, override)
  42
  43   const GLsync mGLName;
  44   const uint64_t mFenceId;
  45   bool mCanBeAvailable = false;
  46
  47   std::optional<std::vector<std::unique_ptr<webgl::Task>>> mOnCompleteTasks =
  48       std::vector<std::unique_ptr<webgl::Task>>{};
  49
  50  public:
  51   WebGLSync(WebGLContext* webgl, GLenum condition, GLbitfield flags);
  52
  53   ClientWaitSyncResult ClientWaitSync(GLbitfield flags, GLuint64 timeout);
  54
  55   template <class F>
  56   void OnCompleteTaskAdd(F&& fn) {
  57     MOZ_RELEASE_ASSERT(mOnCompleteTasks);
  58     auto task = std::make_unique<webgl::FnTask<F>>(std::move(fn));
  59     mOnCompleteTasks->push_back(std::move(task));
  60   }
  61
  62   bool IsKnownComplete() const { return !mOnCompleteTasks; }
  63
  64  private:
  65   ~WebGLSync() override;
  66 };
  67
  68 }  // namespace mozilla
  69
  70 #endif  // WEBGL_SYNC_H_