mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-14 22:56:12 -04:00
Alexey Polyudov
7e19ffbab7
Signed-off-by: Alexey Polyudov <apolyudov@google.com> Change-Id: I83ec7dee1a7ef6f4bdfd47482c94d03910525b7e
109 lines
3.1 KiB
C++
109 lines
3.1 KiB
C++
// Copyright 2020 Google LLC
|
|
//
|
|
// 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
|
|
//
|
|
// https://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 PLATFORM_IMPL_G3_SETTABLE_FUTURE_IMPL_H_
|
|
#define PLATFORM_IMPL_G3_SETTABLE_FUTURE_IMPL_H_
|
|
|
|
#include <utility>
|
|
|
|
#include "platform/api/platform.h"
|
|
#include "platform/api/settable_future.h"
|
|
#include "absl/synchronization/mutex.h"
|
|
#include "absl/time/clock.h"
|
|
#include "absl/types/any.h"
|
|
|
|
namespace location {
|
|
namespace nearby {
|
|
namespace platform {
|
|
|
|
class SettableFutureImpl : public SettableFuture<absl::any> {
|
|
public:
|
|
explicit SettableFutureImpl() = default;
|
|
~SettableFutureImpl() override = default;
|
|
|
|
bool set(absl::any value) override {
|
|
absl::MutexLock lock(&mutex_);
|
|
if (!done_) {
|
|
value_ = std::move(value);
|
|
done_ = true;
|
|
exception_ = {Exception::kSuccess};
|
|
completed_.SignalAll();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool setException(Exception exception) override {
|
|
absl::MutexLock lock(&mutex_);
|
|
return SetExceptionLocked(exception);
|
|
}
|
|
|
|
void addListener(Ptr<Runnable> runnable, Executor* executor) override {}
|
|
|
|
ExceptionOr<std::any> get() override {
|
|
absl::MutexLock lock(&mutex_);
|
|
while (!done_) {
|
|
completed_.Wait(&mutex_);
|
|
}
|
|
return exception_.value != Exception::kSuccess
|
|
? ExceptionOr<std::any>{exception_.value}
|
|
: ExceptionOr<std::any>{value_};
|
|
}
|
|
|
|
ExceptionOr<std::any> get(std::int64_t timeout_ms) override {
|
|
absl::MutexLock lock(&mutex_);
|
|
absl::Duration timeout = absl::Milliseconds(timeout_ms);
|
|
while (!done_) {
|
|
absl::Time start_time = absl::Now();
|
|
if (completed_.WaitWithTimeout(&mutex_, timeout)) {
|
|
SetExceptionLocked({Exception::kTimeout});
|
|
break;
|
|
}
|
|
absl::Duration spent = absl::Now() - start_time;
|
|
if (spent < timeout) {
|
|
timeout -= spent;
|
|
} else if (!done_) {
|
|
SetExceptionLocked({Exception::kTimeout});
|
|
break;
|
|
}
|
|
}
|
|
return exception_.value != Exception::kSuccess
|
|
? ExceptionOr<std::any>{exception_.value}
|
|
: ExceptionOr<std::any>{value_};
|
|
}
|
|
|
|
private:
|
|
bool SetExceptionLocked(Exception exception) {
|
|
if (!done_) {
|
|
exception_ = exception.value != Exception::kSuccess
|
|
? exception
|
|
: Exception{Exception::kFailed};
|
|
done_ = true;
|
|
completed_.SignalAll();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
absl::Mutex mutex_;
|
|
absl::CondVar completed_;
|
|
bool done_{false};
|
|
absl::any value_;
|
|
Exception exception_{Exception::kFailed};
|
|
};
|
|
|
|
} // namespace platform
|
|
} // namespace nearby
|
|
} // namespace location
|
|
|
|
#endif // PLATFORM_IMPL_G3_SETTABLE_FUTURE_IMPL_H_
|