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// Copyright 2017 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef STARBOARD_SHARED_UWP_ASYNC_UTILS_H_
#define STARBOARD_SHARED_UWP_ASYNC_UTILS_H_
#include <windows.h>
#include <ppltasks.h>
#include "starboard/common/log.h"
using Windows::Foundation::IAsyncAction;
using Windows::Foundation::IAsyncOperation;
namespace starboard {
namespace shared {
namespace uwp {
template <typename TResult>
TResult WaitForResult(IAsyncOperation<TResult>^ operation) {
using concurrency::task_continuation_context;
HANDLE event = CreateEvent(nullptr, TRUE, FALSE, nullptr);
concurrency::create_task(operation,
task_continuation_context::use_arbitrary())
.then([&event](TResult result) {
BOOL success = SetEvent(event);
SB_DCHECK(success);
}, task_continuation_context::use_arbitrary());
DWORD return_value = WaitForSingleObject(event, INFINITE);
SB_DCHECK(return_value == WAIT_OBJECT_0);
CloseHandle(event);
return operation->GetResults();
}
inline void WaitForComplete(IAsyncAction^ action) {
using concurrency::task_continuation_context;
HANDLE event = CreateEvent(nullptr, TRUE, FALSE, nullptr);
concurrency::create_task(action, task_continuation_context::use_arbitrary())
.then(
[&event](void) {
BOOL success = SetEvent(event);
SB_DCHECK(success);
},
task_continuation_context::use_arbitrary());
DWORD return_value = WaitForSingleObject(event, INFINITE);
SB_DCHECK(return_value == WAIT_OBJECT_0);
CloseHandle(event);
}
} // namespace uwp
} // namespace shared
} // namespace starboard
#endif // STARBOARD_SHARED_UWP_ASYNC_UTILS_H_