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/*
* Copyright 2017 Google
*
* 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.
*/
#import <Foundation/Foundation.h>
#include <memory>
#include <utility>
#import "Firestore/Source/Util/FSTAssert.h"
#import "Firestore/Source/Util/FSTDispatchQueue.h"
#include "Firestore/core/src/firebase/firestore/util/async_queue.h"
#include "Firestore/core/src/firebase/firestore/util/executor_libdispatch.h"
#include "absl/memory/memory.h"
using firebase::firestore::util::AsyncQueue;
using firebase::firestore::util::DelayedOperation;
using firebase::firestore::util::TimerId;
using firebase::firestore::util::internal::Executor;
using firebase::firestore::util::internal::ExecutorLibdispatch;
NS_ASSUME_NONNULL_BEGIN
#pragma mark - FSTDelayedCallback
@interface FSTDelayedCallback () {
DelayedOperation _impl;
}
@end
@implementation FSTDelayedCallback
- (instancetype)initWithImpl:(DelayedOperation &&)impl {
if (self = [super init]) {
_impl = std::move(impl);
}
return self;
}
- (void)cancel {
_impl.Cancel();
}
@end
#pragma mark - FSTDispatchQueue
@implementation FSTDispatchQueue {
std::unique_ptr<AsyncQueue> _impl;
}
+ (TimerId)convertTimerId:(FSTTimerID)objcTimerID {
const TimerId converted = static_cast<TimerId>(objcTimerID);
switch (converted) {
case TimerId::All:
case TimerId::ListenStreamIdle:
case TimerId::ListenStreamConnectionBackoff:
case TimerId::WriteStreamIdle:
case TimerId::WriteStreamConnectionBackoff:
case TimerId::OnlineStateTimeout:
return converted;
default:
FSTAssert(false, @"Unknown value of enum FSTTimerID.");
}
}
+ (instancetype)queueWith:(dispatch_queue_t)dispatchQueue {
return [[FSTDispatchQueue alloc] initWithQueue:dispatchQueue];
}
- (instancetype)initWithQueue:(dispatch_queue_t)queue {
if (self = [super init]) {
_queue = queue;
auto executor = absl::make_unique<ExecutorLibdispatch>(queue);
_impl = absl::make_unique<AsyncQueue>(std::move(executor));
}
return self;
}
- (void)verifyIsCurrentQueue {
_impl->VerifyIsCurrentQueue();
}
- (void)enterCheckedOperation:(void (^)(void))block {
_impl->ExecuteBlocking([block] { block(); });
}
- (void)dispatchAsync:(void (^)(void))block {
_impl->Enqueue([block] { block(); });
}
- (void)dispatchAsyncAllowingSameQueue:(void (^)(void))block {
_impl->EnqueueRelaxed([block] { block(); });
}
- (void)dispatchSync:(void (^)(void))block {
_impl->EnqueueBlocking([block] { block(); });
}
- (FSTDelayedCallback *)dispatchAfterDelay:(NSTimeInterval)delay
timerID:(FSTTimerID)timerID
block:(void (^)(void))block {
const AsyncQueue::Milliseconds delayMs =
std::chrono::milliseconds(static_cast<long long>(delay * 1000));
const TimerId convertedTimerId = [FSTDispatchQueue convertTimerId:timerID];
DelayedOperation delayed_operation =
_impl->EnqueueAfterDelay(delayMs, convertedTimerId, [block] { block(); });
return [[FSTDelayedCallback alloc] initWithImpl:std::move(delayed_operation)];
}
- (BOOL)containsDelayedCallbackWithTimerID:(FSTTimerID)timerID {
return _impl->IsScheduled([FSTDispatchQueue convertTimerId:timerID]);
}
- (void)runDelayedCallbacksUntil:(FSTTimerID)lastTimerID {
_impl->RunScheduledOperationsUntil([FSTDispatchQueue convertTimerId:lastTimerID]);
}
@end
NS_ASSUME_NONNULL_END
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