mirror of
https://github.com/kidfromjupiter/nearby.git
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Alexey Polyudov
7e19ffbab7
Signed-off-by: Alexey Polyudov <apolyudov@google.com> Change-Id: I83ec7dee1a7ef6f4bdfd47482c94d03910525b7e
81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef PLATFORM_API_SETTABLE_FUTURE_H_
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#define PLATFORM_API_SETTABLE_FUTURE_H_
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#include "platform/api/platform.h"
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#include "platform/api/settable_future_def.h"
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#include "platform/exception.h"
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#include "platform/ptr.h"
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#include "platform/runnable.h"
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#include "absl/types/any.h"
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namespace location {
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namespace nearby {
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// "Common" part of implementation.
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// Placed here for textual compatibility to minimize scope of changes.
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// Can be (and should be) moved to a separate file outside "api" folder.
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// TODO(apolyudov): for API v2.0
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namespace platform {
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namespace impl {
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template <typename T>
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class SettableFutureImpl : public SettableFuture<T> {
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public:
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SettableFutureImpl() {
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future_ = platform::ImplementationPlatform::createSettableFutureAny();
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}
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~SettableFutureImpl() override = default;
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bool set(T value) override { return future_->set(absl::any(value)); }
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bool setException(Exception exception) override {
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return future_->setException(exception);
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}
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void addListener(Ptr<Runnable> runnable, Executor* executor) override {
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future_->addListener(runnable, executor);
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}
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ExceptionOr<T> get() override { return CommonGet(future_->get()); }
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ExceptionOr<T> get(std::int64_t timeout_ms) override {
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return CommonGet(future_->get(timeout_ms));
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}
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private:
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ExceptionOr<T> CommonGet(ExceptionOr<absl::any> ret_val) {
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if (ret_val.exception() != Exception::kSuccess) {
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return ExceptionOr<T>{ret_val.exception()};
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}
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return ExceptionOr<T>{absl::any_cast<T>(ret_val.result())};
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}
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Ptr<SettableFuture<absl::any>> future_;
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};
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} // namespace impl
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template <typename T>
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Ptr<SettableFuture<T>> ImplementationPlatform::createSettableFuture() {
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return Ptr<SettableFuture<T>>(new impl::SettableFutureImpl<T>{});
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}
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} // namespace platform
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} // namespace nearby
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} // namespace location
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#endif // PLATFORM_API_SETTABLE_FUTURE_H_
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