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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>
NS_ASSUME_NONNULL_BEGIN
@interface FSTDispatchQueue : NSObject
/** Creates and returns an FSTDispatchQueue wrapping the specified dispatch_queue_t. */
+ (instancetype)queueWith:(dispatch_queue_t)dispatchQueue;
- (instancetype)init __attribute__((unavailable("Use static constructor method.")));
/**
* Asserts that we are already running on this queue (actually, we can only verify that the
* queue's label is the same, but hopefully that's good enough.)
*/
- (void)verifyIsCurrentQueue;
/**
* Same as dispatch_async() except it asserts that we're not already on the queue, since this
* generally indicates a bug (and can lead to re-ordering of operations, etc).
*
* @param block The block to run.
*/
- (void)dispatchAsync:(void (^)())block;
/**
* Unlike dispatchAsync: this method does not require you to dispatch to a different queue than
* the current one (thus it is equivalent to a raw dispatch_async()).
*
* This is useful, e.g. for dispatching to the user's queue directly from user API call (in which
* case we don't know if we're already on the user's queue or not).
*
* @param block The block to run.
*/
- (void)dispatchAsyncAllowingSameQueue:(void (^)())block;
/** The underlying wrapped dispatch_queue_t */
@property(nonatomic, strong, readonly) dispatch_queue_t queue;
@end
NS_ASSUME_NONNULL_END
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