Interacting with GCD

Usage

To run the example project, clone the repo, and run pod install from the Example directory first.

Features

Data types

Enum conforms to RawRepresentable

• Queue: dispatch_queue_t
• Priority: dispatch_queue_priority_t
• Attribute: dispatch_queue_attr_t
• QualityOfService: RawRepresentable
• BlockFlag: dispatch_block_flags_t

Provided queue

Queue.main
Queue.background

Easy to create queue

let queue = Queue(name: "queue", attribute: Attribute.Serial, qualityOfService: QualityOfService.UserInteractive)

Dispatch

sync {
    print("action goes inside main queue using dispatch_sync")
}

async(Queue.background) {
    print("action goes inside background queue using dispatch_async")
}

after(5) {
    print("action goes inside main queue after 5 seconds using dispatch_after")
}

Chain

Every action is a Task, which can be chained. A Task is like a Pull Signal

let task = on {
    print("action on main queue")
}

task.run()

let background = Queue(name: "background", attribute: Attribute.Serial, qualityOfService: QualityOfService.Background)

on(background) {
    print("on background")
}
.delay(1) {
    print("after delay")
}.on(Queue.main) {
    print("on main")
}.run()

Notes

• All functions, including after and delay defaults to main queue if no queue is provided !!
• To use chain, use on and delay

Installation

Performer is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "Performer"

Credit

Credit goes to

• Pull Signal from Swift Sync and Async Error Handling - iOS Conf SG 2015

Author

Khoa Pham, [email protected]

License

Performer is available under the MIT license. See the LICENSE file for more info.