1 // Copyright 2013 The Flutter 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 FLUTTER_SHELL_PLATFORM_FUCHSIA_VSYNC_WAITER_H_ 6 #define FLUTTER_SHELL_PLATFORM_FUCHSIA_VSYNC_WAITER_H_ 7 8 #include <lib/async/cpp/wait.h> 9 10 #include "flutter/fml/macros.h" 11 #include "flutter/fml/memory/weak_ptr.h" 12 #include "flutter/fml/time/time_point.h" 13 #include "flutter/shell/common/vsync_waiter.h" 14 15 namespace flutter_runner { 16 17 class VsyncWaiter final : public flutter::VsyncWaiter { 18 public: 19 static constexpr zx_signals_t SessionPresentSignal = ZX_EVENT_SIGNALED; 20 21 VsyncWaiter(std::string debug_label, 22 zx_handle_t session_present_handle, 23 flutter::TaskRunners task_runners); 24 25 ~VsyncWaiter() override; 26 27 private: 28 const std::string debug_label_; 29 async::Wait session_wait_; 30 fml::WeakPtrFactory<VsyncWaiter> weak_factory_; 31 32 // |flutter::VsyncWaiter| 33 void AwaitVSync() override; 34 35 void FireCallbackWhenSessionAvailable(); 36 37 void FireCallbackNow(); 38 39 FML_DISALLOW_COPY_AND_ASSIGN(VsyncWaiter); 40 }; 41 42 } // namespace flutter_runner 43 44 #endif // FLUTTER_SHELL_PLATFORM_FUCHSIA_VSYNC_WAITER_H_ 45