Version 1.0.0

CHANGES.md

@@ -1,5 +1,12 @@
 # Change log for kotlinx.coroutines
 
+## Version 1.0.0
+
+  * All Kotlin dependencies updated to 1.3 release version.
+  * Fixed potential memory leak in `HandlerDispatcher.scheduleResumeAfterDelay`, thanks @cbeyls.
+  * `yield` support for `Unconfined` and immediate dispatchers (#737).
+  * Various documentation improvements.
+
 ## Version 1.0.0-RC1
 
  * Coroutines API is updated to Kotlin 1.3.

COMPATIBILITY.md

@@ -20,6 +20,6 @@ In order to migrate `kotlinx.coroutines` to `1.0.0`, follow these steps:
 
 1. Update `kotlinx.coroutines` to `0.30.2` version.
 2. Inspect compiler warnings about deprecated API and migrate it to a proposed alternative. Most of deprecated API has a corresponding   replacement which can be applied from IDEA with quickfix.
-3. Update Kotlin version to `1.3.0` or to the latest `1.3.0-rc` and `kotlinx.coroutines` to version `0.30.2-eap13`. Then just get rid of `experimental` suffix in all imports.
+3. Update Kotlin version to `1.3.0` and `kotlinx.coroutines` to version `0.30.2-eap13`. Then just get rid of `experimental` suffix in all imports.
 4. Update `kotlinx.coroutines` to version `1.0.0` or to the corresponding release candidate of it).
 

README.md

@@ -2,10 +2,10 @@
 
 [![official JetBrains project](http://jb.gg/badges/official.svg)](https://confluence.jetbrains.com/display/ALL/JetBrains+on+GitHub)
 [![GitHub license](https://img.shields.io/badge/license-Apache%20License%202.0-blue.svg?style=flat)](http://www.apache.org/licenses/LICENSE-2.0)
-[![Download](https://api.bintray.com/packages/kotlin/kotlinx/kotlinx.coroutines/images/download.svg?version=1.0.0-RC1) ](https://bintray.com/kotlin/kotlinx/kotlinx.coroutines/1.0.0-RC1)
+[![Download](https://api.bintray.com/packages/kotlin/kotlinx/kotlinx.coroutines/images/download.svg?version=1.0.0) ](https://bintray.com/kotlin/kotlinx/kotlinx.coroutines/1.0.0)
 
 Library support for Kotlin coroutines with [multiplatform](#multiplatform) support.
-This is a companion version for Kotlin `1.3.0-rc-146` release.
+This is a companion version for Kotlin `1.3.0` release.
 
 **NOTE**: `0.30.2` was the last release with Kotlin 1.2 and experimental coroutines.
 See [COMPATIBILITY.md](COMPATIBILITY.md) for details of migration onto the stable Kotlin 1.3 coroutines.
@@ -69,35 +69,33 @@ Add dependencies (you can also add other modules that you need):
 <dependency>
     <groupId>org.jetbrains.kotlinx</groupId>
     <artifactId>kotlinx-coroutines-core</artifactId>
-    <version>1.0.0-RC1</version>
+    <version>1.0.0</version>
 </dependency>
 ```
 
 And make sure that you use the latest Kotlin version:
 
 ```xml
 <properties>
-    <kotlin.version>1.3.0-rc-146</kotlin.version>
+    <kotlin.version>1.3.0</kotlin.version>
 </properties>
 ```
 
-While Kotlin 1.3 is still in release candidate status, in order to depend on it you should add eap repository: `https://dl.bintray.com/kotlin/kotlin-eap`.
-
 ### Gradle
 
 Add dependencies (you can also add other modules that you need):
 
 ```groovy
 dependencies {
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.0.0-RC1'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.0.0'
 }
 ```
 
 And make sure that you use the latest Kotlin version:
 
 ```groovy
 buildscript {
-    ext.kotlin_version = '1.3.0-rc-146'
+    ext.kotlin_version = '1.3.0'
 }
 ```
 
@@ -115,27 +113,19 @@ Add dependencies (you can also add other modules that you need):
 
 ```groovy
 dependencies {
-    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.0.0-RC1")
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.0.0")
 }
 ```
 
 And make sure that you use the latest Kotlin version:
 
 ```groovy
 plugins {
-    kotlin("jvm") version "1.3.0-rc-146"
+    kotlin("jvm") version "1.3.0"
 }
 ```
 
 Make sure that you have either `jcenter()` or `mavenCentral()` in the list of repositories.
-For Kotlin EAP builds you also may need `kotlin-eap` repository:
-
-```
-repository {
-    jcenter()
-    maven { url "https://kotlin.bintray.com/kotlin-eap" }
-}
-```
 
 ### Multiplatform
 
@@ -151,7 +141,7 @@ Add [`kotlinx-coroutines-android`](ui/kotlinx-coroutines-android)
 module as dependency when using `kotlinx.coroutines` on Android:
 
 ```groovy
-implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.0.0-RC1'
+implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.0.0'
 ```
 This gives you access to Android [Dispatchers.Main](https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-android/kotlinx.coroutines.android/kotlinx.coroutines.-dispatchers/index.html)
 coroutine dispatcher and also makes sure that in case of crashed coroutine with unhandled exception this

build.gradle

@@ -52,8 +52,17 @@ allprojects {
         kotlin_version = '1.2-SNAPSHOT'
     }
 
+    def name = it.name
     repositories {
+        /*
+         * google should be first in the repository list because some of the play services
+         * transitive dependencies was removed from jcenter, thus breaking gradle dependency resolution
+         */
+        if (name == "kotlinx-coroutines-play-services") {
+            google()
+        }
         jcenter()
+        maven { url "https://kotlin.bintray.com/kotlin-dev" }
         maven { url "https://kotlin.bintray.com/kotlin-eap" }
         maven { url "https://kotlin.bintray.com/kotlinx" }
     }

common/kotlinx-coroutines-core-common/src/Dispatched.kt

@@ -21,26 +21,40 @@ internal object UndispatchedEventLoop {
     @JvmField
     internal val threadLocalEventLoop = CommonThreadLocal { EventLoop() }
 
-    inline fun execute(continuation: DispatchedContinuation<*>, contState: Any?, mode: Int, block: () -> Unit) {
+    /**
+     * Executes given [block] as part of current event loop, updating related to block [continuation]
+     * mode and state if continuation is not resumed immediately.
+     * [doYield] indicates whether current continuation is yielding (to provide fast-path if event-loop is empty).
+     * Returns `true` if execution of continuation was queued (trampolined) or `false` otherwise.
+     */
+    inline fun execute(continuation: DispatchedContinuation<*>, contState: Any?, mode: Int,
+                       doYield: Boolean = false, block: () -> Unit) : Boolean {
         val eventLoop = threadLocalEventLoop.get()
         if (eventLoop.isActive) {
+            // If we are yielding and queue is empty, we can bail out as part of fast path
+            if (doYield && eventLoop.queue.isEmpty) {
+                return false
+            }
+
             continuation._state = contState
             continuation.resumeMode = mode
             eventLoop.queue.addLast(continuation)
-            return
+            return true
         }
 
         runEventLoop(eventLoop, block)
+        return false
     }
 
-    fun resumeUndispatched(task: DispatchedTask<*>) {
+    fun resumeUndispatched(task: DispatchedTask<*>): Boolean {
         val eventLoop = threadLocalEventLoop.get()
         if (eventLoop.isActive) {
             eventLoop.queue.addLast(task)
-            return
+            return true
         }
 
         runEventLoop(eventLoop, { task.resume(task.delegate, MODE_UNDISPATCHED) })
+        return false
     }
 
     inline fun runEventLoop(eventLoop: EventLoop, block: () -> Unit) {
@@ -227,6 +241,11 @@ internal interface DispatchedTask<in T> : Runnable {
     }
 }
 
+internal fun DispatchedContinuation<Unit>.yieldUndispatched(): Boolean =
+    UndispatchedEventLoop.execute(this, Unit, MODE_CANCELLABLE, doYield = true) {
+        run()
+    }
+
 internal fun <T> DispatchedTask<T>.dispatch(mode: Int = MODE_CANCELLABLE) {
     val delegate = this.delegate
     if (mode.isDispatchedMode && delegate is DispatchedContinuation<*> && mode.isCancellableMode == resumeMode.isCancellableMode) {

common/kotlinx-coroutines-core-common/src/Yield.kt

@@ -19,7 +19,9 @@ public suspend fun yield(): Unit = suspendCoroutineUninterceptedOrReturn sc@ { u
     val context = uCont.context
     context.checkCompletion()
     val cont = uCont.intercepted() as? DispatchedContinuation<Unit> ?: return@sc Unit
-    if (!cont.dispatcher.isDispatchNeeded(context)) return@sc Unit
+    if (!cont.dispatcher.isDispatchNeeded(context)) {
+        return@sc if (cont.yieldUndispatched()) COROUTINE_SUSPENDED else Unit
+    }
     cont.dispatchYield(Unit)
     COROUTINE_SUSPENDED
 }

common/kotlinx-coroutines-core-common/src/channels/Channel.kt

@@ -210,10 +210,9 @@ public interface ReceiveChannel<out E> {
      * **Note: This is an obsolete api.**
      * This function will be replaced with `receiveOrClosed: ReceiveResult<E>` and
      * extension `suspend fun <E: Any> ReceiveChannel<E>.receiveOrNull(): E?`
+     * It is obsolete because it does not distinguish closed channel and null elements.
      */
-    @ExperimentalCoroutinesApi
     @ObsoleteCoroutinesApi
-    @Deprecated(level = DeprecationLevel.WARNING, message = "This method does not distinguish closed channel and null elements")
     public suspend fun receiveOrNull(): E?
 
     /**

common/kotlinx-coroutines-core-common/src/internal/ArrayQueue.kt

@@ -8,6 +8,7 @@ internal class ArrayQueue<T : Any> {
     private var elements = arrayOfNulls<Any>(16)
     private var head = 0
     private var tail = 0
+    val isEmpty: Boolean get() = head == tail
 
     public fun addLast(element: T) {
         elements[tail] = element

common/kotlinx-coroutines-core-common/test/UnconfinedTest.kt

@@ -54,7 +54,7 @@ class UnconfinedTest : TestBase() {
     }
 
     @Test
-    fun enterMultipleTimes() = runTest {
+    fun testEnterMultipleTimes() = runTest {
         launch(Unconfined) {
             expect(1)
         }
@@ -70,5 +70,46 @@ class UnconfinedTest : TestBase() {
         finish(4)
     }
 
+    @Test
+    fun testYield() = runTest {
+        expect(1)
+        launch(Dispatchers.Unconfined) {
+            expect(2)
+            yield()
+            launch {
+                expect(4)
+            }
+            expect(3)
+            yield()
+            expect(5)
+        }.join()
+
+        finish(6)
+    }
+
+    @Test
+    fun testCancellationWihYields() = runTest {
+        expect(1)
+        GlobalScope.launch(Dispatchers.Unconfined) {
+            val job = coroutineContext[Job]!!
+            expect(2)
+            yield()
+            GlobalScope.launch(Dispatchers.Unconfined) {
+                expect(4)
+                job.cancel()
+                expect(5)
+            }
+            expect(3)
+
+            try {
+                yield()
+            } finally {
+                expect(6)
+            }
+        }
+
+        finish(7)
+    }
+
     class TestException : Throwable()
 }

core/kotlinx-coroutines-core/test/UnconfinedConcurrentStressTest.kt

@@ -19,9 +19,9 @@ class UnconfinedConcurrentStressTest : TestBase() {
         executor.close()
     }
 
-    @Test(timeout = 10_000L)
+    @Test
     fun testConcurrent() = runTest {
-        val iterations = 10_000 * stressTestMultiplier
+        val iterations = 1_000 * stressTestMultiplier
         val startBarrier = CyclicBarrier(threads + 1)
         val finishLatch = CountDownLatch(threads)
 

gradle.properties

@@ -1,12 +1,12 @@
 # Kotlin
-version=1.0.0-RC1-SNAPSHOT
+version=1.0.0-SNAPSHOT
 group=org.jetbrains.kotlinx
-kotlin_version=1.3.0-rc-146
-kotlin_native_version=1.3.0-rc-146
+kotlin_version=1.3.0
+kotlin_native_version=1.3.0-rc-208
 
 # Dependencies
 junit_version=4.12
-atomicFU_version=0.11.11
+atomicFU_version=0.11.12
 html_version=0.6.8
 lincheck_version=1.9
 dokka_version=0.9.16-rdev-2-mpp-hacks

integration/kotlinx-coroutines-play-services/build.gradle

@@ -9,10 +9,6 @@ import java.util.zip.ZipFile
 
 ext.tasks_version = '15.0.1'
 
-repositories {
-    google()
-}
-
 def attr = Attribute.of("artifactType", String.class)
 configurations {
     aar {

native/README.md

@@ -42,7 +42,7 @@ repositories {
 }
 
 dependencies {
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core-native:1.0.0-RC1'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core-native:1.0.0'
 }
 
 sourceSets {

ui/coroutines-guide-ui.md

@@ -165,7 +165,7 @@ Add dependencies on `kotlinx-coroutines-android` module to the `dependencies { .
 `app/build.gradle` file:
 
 ```groovy
-compile "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.0.0-RC1"
+compile "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.0.0"
 ```
 
 You can clone [kotlinx.coroutines](https://github.com/Kotlin/kotlinx.coroutines) project from GitHub onto your 

ui/kotlinx-coroutines-android/animation-app/gradle.properties

@@ -18,6 +18,6 @@ org.gradle.jvmargs=-Xmx1536m
 
 kotlin.coroutines=enable
 
-kotlin_version=1.3.0-rc-146
-coroutines_version=1.0.0-RC1
+kotlin_version=1.3.0
+coroutines_version=1.0.0
 

ui/kotlinx-coroutines-android/example-app/gradle.properties

@@ -18,6 +18,6 @@ org.gradle.jvmargs=-Xmx1536m
 
 kotlin.coroutines=enable
 
-kotlin_version=1.3.0-rc-146
-coroutines_version=1.0.0-RC1
+kotlin_version=1.3.0
+coroutines_version=1.0.0
 

ui/kotlinx-coroutines-android/src/HandlerDispatcher.kt

@@ -120,9 +120,11 @@ internal class HandlerContext private constructor(
     }
 
     override fun scheduleResumeAfterDelay(timeMillis: Long, continuation: CancellableContinuation<Unit>) {
-        handler.postDelayed({
+        val block = Runnable {
             with(continuation) { resumeUndispatched(Unit) }
-        }, timeMillis.coerceAtMost(MAX_DELAY))
+        }
+        handler.postDelayed(block, timeMillis.coerceAtMost(MAX_DELAY))
+        continuation.invokeOnCancellation { handler.removeCallbacks(block) }
     }
 
     override fun invokeOnTimeout(timeMillis: Long, block: Runnable): DisposableHandle {