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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>
#import "Firestore/Source/Util/FSTAssert.h"
#import "Firestore/Source/Util/FSTDispatchQueue.h"
NS_ASSUME_NONNULL_BEGIN
@interface FSTDispatchQueue ()
- (instancetype)initWithQueue:(dispatch_queue_t)queue NS_DESIGNATED_INITIALIZER;
@end
@implementation FSTDispatchQueue
+ (instancetype)queueWith:(dispatch_queue_t)dispatchQueue {
return [[FSTDispatchQueue alloc] initWithQueue:dispatchQueue];
}
- (instancetype)initWithQueue:(dispatch_queue_t)queue {
if (self = [super init]) {
_queue = queue;
}
return self;
}
- (void)verifyIsCurrentQueue {
FSTAssert([self onTargetQueue],
@"We are running on the wrong dispatch queue. Expected '%@' Actual: '%@'",
[self targetQueueLabel], [self currentQueueLabel]);
}
- (void)dispatchAsync:(void (^)(void))block {
FSTAssert(![self onTargetQueue],
@"dispatchAsync called when we are already running on target dispatch queue '%@'",
[self targetQueueLabel]);
dispatch_async(self.queue, block);
}
- (void)dispatchAsyncAllowingSameQueue:(void (^)(void))block {
dispatch_async(self.queue, block);
}
- (void)dispatchAfterDelay:(NSTimeInterval)delay block:(void (^)(void))block {
dispatch_time_t delayNs = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delay * NSEC_PER_SEC));
dispatch_after(delayNs, self.queue, block);
}
#pragma mark - Private Methods
- (NSString *)currentQueueLabel {
return [NSString stringWithUTF8String:dispatch_queue_get_label(DISPATCH_CURRENT_QUEUE_LABEL)];
}
- (NSString *)targetQueueLabel {
return [NSString stringWithUTF8String:dispatch_queue_get_label(self.queue)];
}
- (BOOL)onTargetQueue {
return [[self currentQueueLabel] isEqualToString:[self targetQueueLabel]];
}
@end
NS_ASSUME_NONNULL_END
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