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Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: Ie19e006429b138b3768e97dae971a43fdc5ef8bf
This commit is contained in:
Alexey Polyudov
2020-06-04 13:50:45 -07:00
parent de31c27947
commit 4baa1ce96a
365 changed files with 28586 additions and 1503 deletions
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cpp/platform/api/submittable_executor.h
+27 -24
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@@ -15,37 +15,40 @@
#ifndef PLATFORM_API_SUBMITTABLE_EXECUTOR_H_
#define PLATFORM_API_SUBMITTABLE_EXECUTOR_H_
#include <functional>
#include "platform/api/executor.h"
#include "platform/api/future.h"
#include "platform/callable.h"
#include "platform/port/down_cast.h"
#include "platform/ptr.h"
#include "platform/api/platform.h"
#include "platform/api/settable_future.h"
#include "platform/api/submittable_executor_def.h"
#include "platform/exception.h"
namespace location {
namespace nearby {
// Each per-platform concrete implementation is expected to extend from
// SubmittableExecutor and provide an override of its submit() method.
//
// e.g.
// class IOSSubmittableExecutor
// : public SubmittableExecutor<IOSSubmittableExecutor> {
// public:
// template <typename T>
// Ptr<Future<T> > submit(Ptr<Callable<T> > callable) {
// ...
// }
// }
template <typename ConcreteSubmittableExecutor>
class SubmittableExecutor : public Executor {
public:
~SubmittableExecutor() override {}
template <typename T>
Ptr<Future<T>> submit(Ptr<Callable<T>> callable) {
return DOWN_CAST<ConcreteSubmittableExecutor*>(this)->submit(callable);
// "Common" part of implementation.
// Placed here for textual compatibility to minimize scope of changes.
// Can be (and should be) moved to a separate file outside "api" folder.
// TODO(apolyudov): for API v2.0
template <typename T>
Ptr<Future<T>> SubmittableExecutor::submit(Ptr<Callable<T>> callable) {
using Platform = platform::ImplementationPlatform;
Ptr<SettableFuture<T>> future{Platform::createSettableFuture<T>()};
bool submitted = DoSubmit([callable, future]() {
ExceptionOr<T> result = callable->call();
if (result.ok()) {
future->set(std::move(result.result()));
} else {
future->setException({result.exception()});
}
});
if (!submitted) {
// Raise Exception::kExecution if we are shutting down.
future->setException({Exception::kExecution});
}
};
return future;
}
} // namespace nearby
} // namespace location