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Blocking operators run runloop while blocking.

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Krunoslav Zaher 2015-11-05 12:34:20 +01:00
parent e39f5dbce1
commit d4cda2430e
4 changed files with 135 additions and 109 deletions
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10
Rx.xcodeproj/project.pbxproj
View File

@ -358,6 +358,10 @@
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@ -1001,6 +1005,7 @@
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C88BB8711B07E5ED0064D411 /* RxSwift.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = RxSwift.framework; sourceTree = BUILT_PRODUCTS_DIR; };
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@ -1400,6 +1405,7 @@
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C8941BDE1BD5695C00A0E874 /* BlockingObservable.swift */,
C8941BE31BD56B0700A0E874 /* BlockingObservable+Operators.swift */,
C88E296A1BEB712E001CCB92 /* RunLoopLock.swift */,
C8093F591B8A73A20088E94D /* README.md */,
);
path = RxBlocking;
@ -2121,6 +2127,7 @@
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C8941BE41BD56B0700A0E874 /* BlockingObservable+Operators.swift in Sources */,
C8093F5E1B8A73A20088E94D /* ObservableConvertibleType+Blocking.swift in Sources */,
@ -2131,6 +2138,7 @@
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C8941BE51BD56B0700A0E874 /* BlockingObservable+Operators.swift in Sources */,
C8093F5F1B8A73A20088E94D /* ObservableConvertibleType+Blocking.swift in Sources */,
@ -2595,6 +2603,7 @@
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C8F0C04F1BBBFBCE001B112F /* ObservableConvertibleType+Blocking.swift in Sources */,
@ -2803,6 +2812,7 @@
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D2EBEB8A1BB9B9EE003A27DC /* ObservableConvertibleType+Blocking.swift in Sources */,

189
RxBlocking/BlockingObservable+Operators.swift
View File

@ -13,44 +13,39 @@ import Foundation
extension BlockingObservable {
/**
Blocks current thread until sequence terminates.
If sequence terminates with error, terminating error will be thrown.
- returns: All elements of sequence.
*/
public func toArray() throws -> [E] {
let condition = NSCondition()
var elements: [E] = Array<E>()
var error: ErrorType?
var ended = false
Blocks current thread until sequence terminates.
_ = self.source.subscribe { e in
switch e {
case .Next(let element):
elements.append(element)
case .Error(let e):
error = e
condition.lock()
ended = true
condition.signal()
condition.unlock()
case .Completed:
condition.lock()
ended = true
condition.signal()
condition.unlock()
If sequence terminates with error, terminating error will be thrown.
- returns: All elements of sequence.
*/
public func toArray() throws -> [E] {
var elements: [E] = Array<E>()
var error: ErrorType?
let lock = RunLoopLock()
let d = SingleAssignmentDisposable()
lock.dispatch {
d.disposable = self.source.subscribe { e in
switch e {
case .Next(let element):
elements.append(element)
case .Error(let e):
error = e
lock.stop()
case .Completed:
lock.stop()
}
}
}
condition.lock()
while !ended {
condition.wait()
}
condition.unlock()
lock.run()
d.dispose()
if let error = error {
throw error
}
@ -61,99 +56,87 @@ extension BlockingObservable {
extension BlockingObservable {
/**
Blocks current thread until sequence produces first element.
If sequence terminates with error before producing first element, terminating error will be thrown.
- returns: First element of sequence. If sequence is empty `nil` is returned.
*/
Blocks current thread until sequence produces first element.
If sequence terminates with error before producing first element, terminating error will be thrown.
- returns: First element of sequence. If sequence is empty `nil` is returned.
*/
public func first() throws -> E? {
let condition = NSCondition()
var element: E?
var error: ErrorType?
var ended = false
let d = SingleAssignmentDisposable()
d.disposable = self.source.subscribe { e in
switch e {
case .Next(let e):
if element == nil {
element = e
let lock = RunLoopLock()
lock.dispatch {
d.disposable = self.source.subscribe { e in
switch e {
case .Next(let e):
if element == nil {
element = e
}
break
case .Error(let e):
error = e
default:
break
}
break
case .Error(let e):
error = e
default:
break
lock.stop()
}
condition.lock()
ended = true
condition.signal()
condition.unlock()
}
condition.lock()
while !ended {
condition.wait()
}
lock.run()
d.dispose()
condition.unlock()
if let error = error {
throw error
}
return element
}
}
extension BlockingObservable {
/**
Blocks current thread until sequence terminates.
If sequence terminates with error, terminating error will be thrown.
- returns: Last element in the sequence. If sequence is empty `nil` is returned.
*/
Blocks current thread until sequence terminates.
If sequence terminates with error, terminating error will be thrown.
- returns: Last element in the sequence. If sequence is empty `nil` is returned.
*/
public func last() throws -> E? {
let condition = NSCondition()
var element: E?
var error: ErrorType?
var ended = false
let d = SingleAssignmentDisposable()
d.disposable = self.source.subscribe { e in
switch e {
case .Next(let e):
element = e
return
case .Error(let e):
error = e
default:
break
let lock = RunLoopLock()
lock.dispatch {
d.disposable = self.source.subscribe { e in
switch e {
case .Next(let e):
element = e
return
case .Error(let e):
error = e
default:
break
}
lock.stop()
}
condition.lock()
ended = true
condition.signal()
condition.unlock()
}
condition.lock()
while !ended {
condition.wait()
}
lock.run()
d.dispose()
condition.unlock()
if let error = error {
throw error

33
RxBlocking/RunLoopLock.swift Normal file
View File

@ -0,0 +1,33 @@
//
// RunLoopLock.swift
// Rx
//
// Created by Krunoslav Zaher on 11/5/15.
// Copyright © 2015 Krunoslav Zaher. All rights reserved.
//
import Foundation
class RunLoopLock : NSObject {
let currentRunLoop: CFRunLoopRef
override init() {
currentRunLoop = CFRunLoopGetCurrent()
}
func dispatch(action: () -> ()) {
CFRunLoopPerformBlock(currentRunLoop, kCFRunLoopDefaultMode, action)
CFRunLoopWakeUp(currentRunLoop)
}
func stop() {
CFRunLoopPerformBlock(currentRunLoop, kCFRunLoopDefaultMode) {
CFRunLoopStop(self.currentRunLoop)
}
CFRunLoopWakeUp(currentRunLoop)
}
func run() {
CFRunLoopRun()
}
}

12
RxTests/RxSwiftTests/Tests/Observable+BlockingTest.swift
View File

@ -30,8 +30,8 @@ extension ObservableBlockingTest {
try (failWith(testError) as Observable<Int>).toBlocking().toArray()
XCTFail("It should fail")
}
catch {
catch let e {
XCTAssertTrue(e as NSError === testError)
}
}
@ -67,8 +67,8 @@ extension ObservableBlockingTest {
try (failWith(testError) as Observable<Int>).toBlocking().first()
XCTFail()
}
catch {
catch let e {
XCTAssertTrue(e as NSError === testError)
}
}
@ -104,8 +104,8 @@ extension ObservableBlockingTest {
try (failWith(testError) as Observable<Int>).toBlocking().last()
XCTFail()
}
catch {
catch let e {
XCTAssertTrue(e as NSError === testError)
}
}