Merge remote-tracking branch 'origin/dev' into mp-samplers

.gitignore

@@ -8,5 +8,3 @@ out/
 
 # Cache of project
 .gradletasknamecache
-
-gradle.properties

CHANGELOG.md

@@ -5,18 +5,21 @@
 - `fun` annotation for SAM interfaces in library
 - Explicit `public` visibility for all public APIs
 - Better trigonometric and hyperbolic functions for `AutoDiffField` (https://github.com/mipt-npm/kmath/pull/140).
-- Automatic documentation generation for features (#139)
+- Automatic README generation for features (#139)
+- Native support for `memory`, `core` and `dimensions`
 
 ### Changed
 - Package changed from `scientifik` to `kscience.kmath`.
 - Gradle version: 6.6 -> 6.6.1
 - Minor exceptions refactor (throwing `IllegalArgumentException` by argument checks instead of `IllegalStateException`)
 - `Polynomial` secondary constructor made function.
+- Kotlin version: 1.3.72 -> 1.4.20-M1
 
 ### Deprecated
 
 ### Removed
 - `kmath-koma` module because it doesn't support Kotlin 1.4.
+- Support of `legacy` JS backend (we will support only IR)
 
 ### Fixed
 - `symbol` method in `MstExtendedField` (https://github.com/mipt-npm/kmath/pull/140)

README.md

@@ -9,9 +9,9 @@ Bintray-dev:    [ ![Download](https://api.bintray.com/packages/mipt-npm/dev/kmat
 
 # KMath
 Could be pronounced as `key-math`.
-The Kotlin MATHematics library is intended as a Kotlin-based analog to Python's `numpy` library. In contrast to `numpy` and `scipy` it is modular and has a lightweight core.
+The Kotlin MATHematics library  was initially intended as a Kotlin-based analog to Python's `numpy` library. Later we found that kotlin is much more flexible language and allows superior architecture designs. In contrast to `numpy` and `scipy` it is modular and has a lightweight core. The `numpy`-like experience could be achieved with [kmath-for-real](/kmath-for-real) extension module.
 
-## Publications
+## Publications and talks
 * [A conceptual article about context-oriented design](https://proandroiddev.com/an-introduction-context-oriented-programming-in-kotlin-2e79d316b0a2)
 * [Another article about context-oriented design](https://proandroiddev.com/diving-deeper-into-context-oriented-programming-in-kotlin-3ecb4ec38814)
 * [ACAT 2019 conference paper](https://aip.scitation.org/doi/abs/10.1063/1.5130103)
@@ -29,7 +29,7 @@ The Kotlin MATHematics library is intended as a Kotlin-based analog to Python's
 
 ## Features
 
-Actual feature list is [here](docs/features.md)
+Actual feature list is [here](/docs/features.md)
 
 * **Algebra**
     * Algebraic structures like rings, spaces and field (**TODO** add example to wiki)
@@ -68,30 +68,99 @@ can be used for a wide variety of purposes from high performance calculations to
 
 ## Modules
 
-### [kmath-core](kmath-core)
+<hr/>
- - [algebras](kmath-core/src/commonMain/kotlin/kscience/kmath/operations/Algebra.kt) : Algebraic structures: contexts and elements
- - [nd](kmath-core/src/commonMain/kotlin/kscience/kmath/structures/NDStructure.kt) : Many-dimensional structures
- - [buffers](kmath-core/src/commonMain/kotlin/kscience/kmath/structures/Buffers.kt) : One-dimensional structure
- - [expressions](kmath-core/src/commonMain/kotlin/kscience/kmath/expressions) : Functional Expressions
- - [domains](kmath-core/src/commonMain/kotlin/kscience/kmath/domains) : Domains
- - [autodif](kmath-core/src/commonMain/kotlin/kscience/kmath/misc/AutoDiff.kt) : Automatic differentiation
 
-### [kmath-coroutines](kmath-coroutines)
+* ### [examples](examples)
-### [kmath-viktor](kmath-viktor)
+> 
-### [kmath-prob](kmath-prob)
+>
-### [kmath-ast](kmath-ast)
+> **Maturity**: EXPERIMENTAL
-### [kmath-commons](kmath-commons)
+<hr/>
-### [kmath-memory](kmath-memory)
+
-### [kmath-for-real](kmath-for-real)
+* ### [kmath-ast](kmath-ast)
-### [kmath-functions](kmath-functions)
+> 
-### [kmath-dimensions](kmath-dimensions)
+>
-### [kmath-histograms](kmath-histograms)
+> **Maturity**: EXPERIMENTAL
-### [kmath-geometry](kmath-geometry)
+<hr/>
+
+* ### [kmath-commons](kmath-commons)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-core](kmath-core)
+> Core classes, algebra definitions, basic linear algebra
+>
+> **Maturity**: DEVELOPMENT
+>
+> **Features:**
+> - [algebras](kmath-core/src/commonMain/kotlin/kscience/kmath/operations/Algebra.kt) : Algebraic structures: contexts and elements
+> - [nd](kmath-core/src/commonMain/kotlin/kscience/kmath/structures/NDStructure.kt) : Many-dimensional structures
+> - [buffers](kmath-core/src/commonMain/kotlin/kscience/kmath/structures/Buffers.kt) : One-dimensional structure
+> - [expressions](kmath-core/src/commonMain/kotlin/kscience/kmath/expressions) : Functional Expressions
+> - [domains](kmath-core/src/commonMain/kotlin/kscience/kmath/domains) : Domains
+> - [autodif](kmath-core/src/commonMain/kotlin/kscience/kmath/misc/AutoDiff.kt) : Automatic differentiation
+
+<hr/>
+
+* ### [kmath-coroutines](kmath-coroutines)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-dimensions](kmath-dimensions)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-for-real](kmath-for-real)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-functions](kmath-functions)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-geometry](kmath-geometry)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-histograms](kmath-histograms)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-memory](kmath-memory)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-prob](kmath-prob)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-viktor](kmath-viktor)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
 
 
 ## Multi-platform support
 
-KMath is developed as a multi-platform library, which means that most of interfaces are declared in the [common module](kmath-core/src/commonMain). Implementation is also done in the common module wherever possible. In some cases, features are delegated to platform-specific implementations even if they could be done in the common module for performance reasons. Currently, the JVM is the main focus of development, however Kotlin/Native and Kotlin/JS contributions are also welcome.
+KMath is developed as a multi-platform library, which means that most of the interfaces are declared in the [common module](/kmath-core/src/commonMain). Implementation is also done in the common module wherever possible. In some cases, features are delegated to platform-specific implementations even if they could be done in the common module for performance reasons. Currently, the JVM is the main focus of development, however Kotlin/Native and Kotlin/JS contributions are also welcome.
 
 ## Performance
 

build.gradle.kts

@@ -1,15 +1,15 @@
 plugins {
-    id("ru.mipt.npm.base")
+    id("ru.mipt.npm.project")
-    id("org.jetbrains.changelog") version "0.4.0"
 }
 
-val kmathVersion by extra("0.2.0-dev-1")
+val kmathVersion by extra("0.2.0-dev-2")
 val bintrayRepo by extra("kscience")
 val githubProject by extra("kmath")
 
 allprojects {
     repositories {
         jcenter()
+        maven("https://dl.bintray.com/kotlin/kotlin-eap")
         maven("https://dl.bintray.com/kotlin/kotlinx")
         maven("https://dl.bintray.com/hotkeytlt/maven")
     }
@@ -22,79 +22,6 @@ subprojects {
     if (name.startsWith("kmath")) apply<ru.mipt.npm.gradle.KSciencePublishPlugin>()
 }
 
-/**
+readme{
- * TODO move to base plugin
+    readmeTemplate = file("docs/templates/README-TEMPLATE.md")
- */
-val generateReadme by tasks.creating {
-    group = "documentation"
-
-    fun List<Map<String, Any?>>.generateFeatureString(pathPrefix: String): String = buildString {
-        this@generateFeatureString.forEach { feature ->
-            val id by feature
-            val description by feature
-            val ref by feature
-            appendln(" - [$id]($pathPrefix$ref) : $description")
-        }
-    }
-
-    doLast {
-        val reader = groovy.json.JsonSlurper()
-        val projects = HashMap<String, Map<String, Any?>>()
-
-        project.subprojects {
-            var properties: Map<String, Any?> = mapOf(
-                "name" to this.name,
-                "group" to this.group,
-                "version" to this.version
-            )
-
-            val projectProperties = this.file("docs/kscience-module.json")
-
-            @Suppress("UNCHECKED_CAST")
-            if (projectProperties.exists()) {
-                val customProperties: Map<String, Any?> =
-                    (reader.parse(projectProperties) as? Map<String, Any?> ?: emptyMap()).withDefault { null }
-                val features: List<Map<String, Any?>>? by customProperties
-                val featureString = features?.generateFeatureString("")
-                properties = customProperties + properties + ("featuresString" to featureString)
-            }
-
-            projects[name] = properties.withDefault { null }
-
-            val readmeStub = this.file("docs/README-STUB.md")
-            if (readmeStub.exists()) {
-                val readmeFile = this.file("README.md")
-                readmeFile.writeText(
-                    groovy.text.SimpleTemplateEngine().createTemplate(readmeStub).make(properties).toString()
-                )
-            }
-        }
-
-        val rootReadmeStub = project.file("docs/README-STUB.md")
-
-        val modulesString = buildString {
-            projects.filter { it.key.startsWith("kmath") }.forEach { (name, properties) ->
-                appendln("### [$name]($name)")
-                val features: List<Map<String, Any?>>? by properties
-                if (features != null) {
-                    appendln(features!!.generateFeatureString("$name/"))
-                }
-            }
-        }
-
-        val rootReadmeProperties: Map<String, Any> = mapOf(
-            "name" to project.name,
-            "group" to project.group,
-            "version" to project.version,
-            "modulesString" to modulesString
-        )
-
-        if (rootReadmeStub.exists()) {
-            val readmeFile = project.file("README.md")
-            readmeFile.writeText(
-                groovy.text.SimpleTemplateEngine().createTemplate(rootReadmeStub).make(rootReadmeProperties).toString()
-            )
-        }
-
-    }
 }

docs/templates/ARTIFACT-TEMPLATE.md

@@ -0,0 +1,37 @@
+> #### Artifact:
+>
+> This module artifact: `${group}:${name}:${version}`.
+>
+> Bintray release version:        [ ![Download](https://api.bintray.com/packages/mipt-npm/kscience/${name}/images/download.svg) ](https://bintray.com/mipt-npm/kscience/${name}/_latestVersion)
+>
+> Bintray development version:    [ ![Download](https://api.bintray.com/packages/mipt-npm/dev/${name}/images/download.svg) ](https://bintray.com/mipt-npm/dev/${name}/_latestVersion)
+>
+> **Gradle:**
+>
+> ```gradle
+> repositories {
+>     maven { url "https://dl.bintray.com/kotlin/kotlin-eap" }
+>     maven { url 'https://dl.bintray.com/mipt-npm/kscience' }
+>     maven { url 'https://dl.bintray.com/mipt-npm/dev' }
+>     maven { url 'https://dl.bintray.com/hotkeytlt/maven' }
+
+> }
+> 
+> dependencies {
+>     implementation '${group}:${name}:${version}'
+> }
+> ```
+> **Gradle Kotlin DSL:**
+>
+> ```kotlin
+> repositories {
+>     maven("https://dl.bintray.com/kotlin/kotlin-eap")
+>     maven("https://dl.bintray.com/mipt-npm/kscience")
+>     maven("https://dl.bintray.com/mipt-npm/dev")
+>     maven("https://dl.bintray.com/hotkeytlt/maven")
+> }
+> 
+> dependencies {
+>     implementation("${group}:${name}:${version}")
+> }
+> ```

docs/templates/README-TEMPLATE.md

@@ -9,9 +9,9 @@ Bintray-dev:    [ ![Download](https://api.bintray.com/packages/mipt-npm/dev/kmat
 
 # KMath
 Could be pronounced as `key-math`.
-The Kotlin MATHematics library is intended as a Kotlin-based analog to Python's `numpy` library. In contrast to `numpy` and `scipy` it is modular and has a lightweight core.
+The Kotlin MATHematics library  was initially intended as a Kotlin-based analog to Python's `numpy` library. Later we found that kotlin is much more flexible language and allows superior architecture designs. In contrast to `numpy` and `scipy` it is modular and has a lightweight core. The `numpy`-like experience could be achieved with [kmath-for-real](/kmath-for-real) extension module.
 
-## Publications
+## Publications and talks
 * [A conceptual article about context-oriented design](https://proandroiddev.com/an-introduction-context-oriented-programming-in-kotlin-2e79d316b0a2)
 * [Another article about context-oriented design](https://proandroiddev.com/diving-deeper-into-context-oriented-programming-in-kotlin-3ecb4ec38814)
 * [ACAT 2019 conference paper](https://aip.scitation.org/doi/abs/10.1063/1.5130103)
@@ -29,7 +29,7 @@ The Kotlin MATHematics library is intended as a Kotlin-based analog to Python's
 
 ## Features
 
-Actual feature list is [here](docs/features.md)
+Actual feature list is [here](/docs/features.md)
 
 * **Algebra**
     * Algebraic structures like rings, spaces and field (**TODO** add example to wiki)
@@ -68,11 +68,11 @@ can be used for a wide variety of purposes from high performance calculations to
 
 ## Modules
 
-$modulesString
+$modules
 
 ## Multi-platform support
 
-KMath is developed as a multi-platform library, which means that most of interfaces are declared in the [common module](kmath-core/src/commonMain). Implementation is also done in the common module wherever possible. In some cases, features are delegated to platform-specific implementations even if they could be done in the common module for performance reasons. Currently, the JVM is the main focus of development, however Kotlin/Native and Kotlin/JS contributions are also welcome.
+KMath is developed as a multi-platform library, which means that most of the interfaces are declared in the [common module](/kmath-core/src/commonMain). Implementation is also done in the common module wherever possible. In some cases, features are delegated to platform-specific implementations even if they could be done in the common module for performance reasons. Currently, the JVM is the main focus of development, however Kotlin/Native and Kotlin/JS contributions are also welcome.
 
 ## Performance
 

examples/build.gradle.kts

@@ -3,8 +3,8 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 plugins {
     java
     kotlin("jvm")
-    kotlin("plugin.allopen") version "1.4.20-dev-3898-14"
+    kotlin("plugin.allopen")
-    id("kotlinx.benchmark") version "0.2.0-dev-20"
+    id("kotlinx.benchmark")
 }
 
 allOpen.annotation("org.openjdk.jmh.annotations.State")
@@ -26,7 +26,7 @@ dependencies {
     implementation(project(":kmath-prob"))
     implementation(project(":kmath-viktor"))
     implementation(project(":kmath-dimensions"))
-    implementation("org.jetbrains.kotlinx:kotlinx-io-jvm:0.2.0-npm-dev-6")
+    implementation("org.jetbrains.kotlinx:kotlinx-io:0.2.0-npm-dev-11")
     implementation("org.jetbrains.kotlinx:kotlinx.benchmark.runtime:0.2.0-dev-20")
     "benchmarksCompile"(sourceSets.main.get().output + sourceSets.main.get().compileClasspath) //sourceSets.main.output + sourceSets.main.runtimeClasspath
 }
@@ -34,9 +34,8 @@ dependencies {
 // Configure benchmark
 benchmark {
     // Setup configurations
-    targets
+    targets.register("benchmarks")
     // This one matches sourceSet name above
-        .register("benchmarks")
 
     configurations.register("fast") {
         warmups = 5 // number of warmup iterations

gradle.properties

@@ -0,0 +1,9 @@
+kotlin.code.style=official
+kotlin.parallel.tasks.in.project=true
+kotlin.mpp.enableGranularSourceSetsMetadata=true
+kotlin.native.enableDependencyPropagation=false
+kotlin.mpp.stability.nowarn=true
+
+org.gradle.jvmargs=-XX:MaxMetaspaceSize=512m
+org.gradle.parallel=true
+systemProp.org.gradle.internal.publish.checksums.insecure=true

kmath-commons/src/main/kotlin/kscience/kmath/commons/expressions/DiffExpression.kt

@@ -94,7 +94,7 @@ public class DiffExpression(public val function: DerivativeStructureField.() ->
      * TODO make result [DiffExpression]
      */
     public fun derivative(orders: Map<String, Int>): Expression<Double> = Expression { arguments ->
-        (DerivativeStructureField(orders.values.max() ?: 0, arguments)) { function().deriv(orders) }
+        (DerivativeStructureField(orders.values.maxOrNull() ?: 0, arguments)) { function().deriv(orders) }
     }
 
     //TODO add gradient and maybe other vector operators

kmath-core/README.md

@@ -1,6 +1,7 @@
 # The Core Module (`kmath-core`)
 
 The core features of KMath:
+
  - [algebras](src/commonMain/kotlin/kscience/kmath/operations/Algebra.kt) : Algebraic structures: contexts and elements
  - [nd](src/commonMain/kotlin/kscience/kmath/structures/NDStructure.kt) : Many-dimensional structures
  - [buffers](src/commonMain/kotlin/kscience/kmath/structures/Buffers.kt) : One-dimensional structure
@@ -10,15 +11,20 @@ The core features of KMath:
 
 
 > #### Artifact:
+>
 > This module artifact: `kscience.kmath:kmath-core:0.2.0-dev-1`.
 >
+> Bintray release version:        [ ![Download](https://api.bintray.com/packages/mipt-npm/kscience/kmath-core/images/download.svg) ](https://bintray.com/mipt-npm/kscience/kmath-core/_latestVersion)
+>
+> Bintray development version:    [ ![Download](https://api.bintray.com/packages/mipt-npm/dev/kmath-core/images/download.svg) ](https://bintray.com/mipt-npm/dev/kmath-core/_latestVersion)
+>
 > **Gradle:**
 >
 > ```gradle
 > repositories {
 >     maven { url 'https://dl.bintray.com/mipt-npm/kscience' }
 >     maven { url 'https://dl.bintray.com/mipt-npm/dev' }
->     maven { url https://dl.bintray.com/hotkeytlt/maven' }
+>     maven { url 'https://dl.bintray.com/hotkeytlt/maven' }
 > }
 > 
 > dependencies {

kmath-core/build.gradle.kts

@@ -1,7 +1,46 @@
-plugins { id("ru.mipt.npm.mpp") }
+plugins {
+    id("ru.mipt.npm.mpp")
+    id("ru.mipt.npm.native")
+}
 
 kotlin.sourceSets.commonMain {
     dependencies {
         api(project(":kmath-memory"))
     }
 }
+
+readme {
+    description = "Core classes, algebra definitions, basic linear algebra"
+    maturity = ru.mipt.npm.gradle.Maturity.DEVELOPMENT
+    propertyByTemplate("artifact", rootProject.file("docs/templates/ARTIFACT-TEMPLATE.md"))
+    feature(
+        id = "algebras",
+        description = "Algebraic structures: contexts and elements",
+        ref = "src/commonMain/kotlin/kscience/kmath/operations/Algebra.kt"
+    )
+    feature(
+        id = "nd",
+        description = "Many-dimensional structures",
+        ref = "src/commonMain/kotlin/kscience/kmath/structures/NDStructure.kt"
+    )
+    feature(
+        id = "buffers",
+        description = "One-dimensional structure",
+        ref = "src/commonMain/kotlin/kscience/kmath/structures/Buffers.kt"
+    )
+    feature(
+        id = "expressions",
+        description = "Functional Expressions",
+        ref = "src/commonMain/kotlin/kscience/kmath/expressions"
+    )
+    feature(
+        id = "domains",
+        description = "Domains",
+        ref = "src/commonMain/kotlin/kscience/kmath/domains"
+    )
+    feature(
+        id = "autodif",
+        description = "Automatic differentiation",
+        ref = "src/commonMain/kotlin/kscience/kmath/misc/AutoDiff.kt"
+    )
+}

kmath-core/docs/README-STUB.md

@@ -1,34 +0,0 @@
-# The Core Module (`kmath-core`)
-
-The core features of KMath:
-$featuresString
-
-> #### Artifact:
-> This module artifact: `$group:kmath-core:$version`.
-> 
-> **Gradle:**
->
-> ```gradle
-> repositories {
->     maven { url 'https://dl.bintray.com/mipt-npm/kscience' }
->     maven { url 'https://dl.bintray.com/mipt-npm/dev' }
->     maven { url https://dl.bintray.com/hotkeytlt/maven' }
-> }
-> 
-> dependencies {
->     implementation '$group:kmath-core:$version'
-> }
-> ```
-> **Gradle Kotlin DSL:**
->
-> ```kotlin
-> repositories {
->     maven("https://dl.bintray.com/mipt-npm/kscience")
->     maven("https://dl.bintray.com/mipt-npm/dev")
->     maven("https://dl.bintray.com/hotkeytlt/maven")
-> }
-> 
-> dependencies {
->     implementation("$group:kmath-core:$version")
-> }
-> ```

kmath-core/docs/README-TEMPLATE.md

@@ -0,0 +1,7 @@
+# The Core Module (`kmath-core`)
+
+The core features of KMath:
+
+${features}
+
+${artifact}

kmath-core/docs/kscience-module.json

@@ -1,36 +0,0 @@
-{
-  "description": "Core classes, algebra definitions, basic linear algebra",
-  "maturity": "development",
-  "features": [
-    {
-      "id": "algebras",
-      "description": "Algebraic structures: contexts and elements",
-      "ref": "src/commonMain/kotlin/kscience/kmath/operations/Algebra.kt"
-    },
-    {
-      "id": "nd",
-      "description": "Many-dimensional structures",
-      "ref": "src/commonMain/kotlin/kscience/kmath/structures/NDStructure.kt"
-    },
-    {
-      "id": "buffers",
-      "description": "One-dimensional structure",
-      "ref": "src/commonMain/kotlin/kscience/kmath/structures/Buffers.kt"
-    },
-    {
-      "id": "expressions",
-      "description": "Functional Expressions",
-      "ref": "src/commonMain/kotlin/kscience/kmath/expressions"
-    },
-    {
-      "id": "domains",
-      "description": "Domains",
-      "ref": "src/commonMain/kotlin/kscience/kmath/domains"
-    },
-    {
-      "id": "autodif",
-      "description": "Automatic differentiation",
-      "ref": "src/commonMain/kotlin/kscience/kmath/misc/AutoDiff.kt"
-    }
-  ]
-}

kmath-core/src/commonMain/kotlin/kscience/kmath/operations/Complex.kt

@@ -1,11 +1,11 @@
 package kscience.kmath.operations
 
+import kscience.kmath.memory.MemoryReader
+import kscience.kmath.memory.MemorySpec
+import kscience.kmath.memory.MemoryWriter
 import kscience.kmath.structures.Buffer
 import kscience.kmath.structures.MemoryBuffer
 import kscience.kmath.structures.MutableBuffer
-import kscience.memory.MemoryReader
-import kscience.memory.MemorySpec
-import kscience.memory.MemoryWriter
 import kotlin.math.*
 
 /**

kmath-core/src/commonMain/kotlin/kscience/kmath/structures/MemoryBuffer.kt

@@ -1,6 +1,6 @@
 package kscience.kmath.structures
 
-import kscience.memory.*
+import kscience.kmath.memory.*
 
 /**
  * A non-boxing buffer over [Memory] object.

kmath-core/src/commonMain/kotlin/kscience/kmath/structures/NDAlgebra.kt

@@ -4,6 +4,7 @@ import kscience.kmath.operations.Complex
 import kscience.kmath.operations.Field
 import kscience.kmath.operations.Ring
 import kscience.kmath.operations.Space
+import kotlin.native.concurrent.ThreadLocal
 
 /**
  * An exception is thrown when the expected ans actual shape of NDArray differs
@@ -115,6 +116,7 @@ public interface NDField<T, F : Field<T>, N : NDStructure<T>> : Field<N>, NDRing
 
     public operator fun T.div(arg: N): N = map(arg) { divide(it, this@div) }
 
+    @ThreadLocal
     public companion object {
         private val realNDFieldCache: MutableMap<IntArray, RealNDField> = hashMapOf()
 

kmath-core/src/commonMain/kotlin/kscience/kmath/structures/NDStructure.kt

@@ -1,6 +1,7 @@
 package kscience.kmath.structures
 
 import kotlin.jvm.JvmName
+import kotlin.native.concurrent.ThreadLocal
 import kotlin.reflect.KClass
 
 /**
@@ -230,6 +231,7 @@ public class DefaultStrides private constructor(override val shape: IntArray) :
 
     override fun hashCode(): Int = shape.contentHashCode()
 
+    @ThreadLocal
     public companion object {
         private val defaultStridesCache = HashMap<IntArray, Strides>()
 

kmath-core/src/commonTest/kotlin/kscience/kmath/operations/ComplexTest.kt

@@ -2,6 +2,7 @@ package kscience.kmath.operations
 
 import kotlin.test.Test
 import kotlin.test.assertEquals
+import kotlin.test.assertTrue
 
 internal class ComplexTest {
     @Test
@@ -13,7 +14,7 @@ internal class ComplexTest {
 
     @Test
     fun reciprocal() {
-        assertEquals(Complex(0.5, -0.0), 2.toComplex().reciprocal)
+        assertTrue { (Complex(0.5, -0.0) - 2.toComplex().reciprocal).r < 1e-10}
     }
 
     @Test

kmath-dimensions/build.gradle.kts

@@ -1,4 +1,7 @@
-plugins { id("ru.mipt.npm.mpp") }
+plugins {
+    id("ru.mipt.npm.mpp")
+    id("ru.mipt.npm.native")
+}
 
 description = "A proof of concept module for adding type-safe dimensions to structures"
 

kmath-dimensions/src/nativeMain/kotlin/kscience/kmath/dimensions/dimNative.kt

@@ -0,0 +1,20 @@
+package kscience.kmath.dimensions
+
+import kotlin.native.concurrent.ThreadLocal
+import kotlin.reflect.KClass
+
+@ThreadLocal
+private val dimensionMap: MutableMap<UInt, Dimension> = hashMapOf(1u to D1, 2u to D2, 3u to D3)
+
+@Suppress("UNCHECKED_CAST")
+public actual fun <D : Dimension> Dimension.Companion.resolve(type: KClass<D>): D = dimensionMap
+    .entries
+    .map(MutableMap.MutableEntry<UInt, Dimension>::value)
+    .find { it::class == type } as? D
+    ?: error("Can't resolve dimension $type")
+
+public actual fun Dimension.Companion.of(dim: UInt): Dimension = dimensionMap.getOrPut(dim) {
+    object : Dimension {
+        override val dim: UInt get() = dim
+    }
+}

kmath-memory/build.gradle.kts

@@ -1 +1,4 @@
-plugins { id("ru.mipt.npm.mpp") }
+plugins {
+    id("ru.mipt.npm.mpp")
+    id("ru.mipt.npm.native")
+}

kmath-memory/src/commonMain/kotlin/kscience/kmath/memory/Memory.kt

@@ -1,4 +1,4 @@
-package kscience.memory
+package kscience.kmath.memory
 
 import kotlin.contracts.InvocationKind
 import kotlin.contracts.contract

kmath-memory/src/commonMain/kotlin/kscience/kmath/memory/MemorySpec.kt

@@ -1,4 +1,4 @@
-package kscience.memory
+package kscience.kmath.memory
 
 /**
  * A specification to read or write custom objects with fixed size in bytes.

kmath-memory/src/jsMain/kotlin/kscience/kmath/memory/DataViewMemory.kt

@@ -1,4 +1,4 @@
-package kscience.memory
+package kscience.kmath.memory
 
 import org.khronos.webgl.ArrayBuffer
 import org.khronos.webgl.DataView

kmath-memory/src/jvmMain/kotlin/kscience/kmath/memory/ByteBufferMemory.kt

@@ -1,4 +1,4 @@
-package kscience.memory
+package kscience.kmath.memory
 
 import java.io.IOException
 import java.nio.ByteBuffer

kmath-memory/src/nativeMain/kotlin/kscience/kmath/memory/NativeMemory.kt

@@ -0,0 +1,93 @@
+package kscience.kmath.memory
+
+@PublishedApi
+internal class NativeMemory(
+    val array: ByteArray,
+    val startOffset: Int = 0,
+    override val size: Int = array.size
+) : Memory {
+    @Suppress("NOTHING_TO_INLINE")
+    private inline fun position(o: Int): Int = startOffset + o
+
+    override fun view(offset: Int, length: Int): Memory {
+        require(offset >= 0) { "offset shouldn't be negative: $offset" }
+        require(length >= 0) { "length shouldn't be negative: $length" }
+        require(offset + length <= size) { "Can't view memory outside the parent region." }
+        return NativeMemory(array, position(offset), length)
+    }
+
+    override fun copy(): Memory {
+        val copy = array.copyOfRange(startOffset, startOffset + size)
+        return NativeMemory(copy)
+    }
+
+    private val reader: MemoryReader = object : MemoryReader {
+        override val memory: Memory get() = this@NativeMemory
+
+        override fun readDouble(offset: Int) = array.getDoubleAt(position(offset))
+
+        override fun readFloat(offset: Int) = array.getFloatAt(position(offset))
+
+        override fun readByte(offset: Int) = array[position(offset)]
+
+        override fun readShort(offset: Int) = array.getShortAt(position(offset))
+
+        override fun readInt(offset: Int) = array.getIntAt(position(offset))
+
+        override fun readLong(offset: Int) = array.getLongAt(position(offset))
+
+        override fun release() {
+            // does nothing on JVM
+        }
+    }
+
+    override fun reader(): MemoryReader = reader
+
+    private val writer: MemoryWriter = object : MemoryWriter {
+        override val memory: Memory get() = this@NativeMemory
+
+        override fun writeDouble(offset: Int, value: Double) {
+            array.setDoubleAt(position(offset), value)
+        }
+
+        override fun writeFloat(offset: Int, value: Float) {
+            array.setFloatAt(position(offset), value)
+        }
+
+        override fun writeByte(offset: Int, value: Byte) {
+            array.set(position(offset), value)
+        }
+
+        override fun writeShort(offset: Int, value: Short) {
+            array.setShortAt(position(offset), value)
+        }
+
+        override fun writeInt(offset: Int, value: Int) {
+            array.setIntAt(position(offset), value)
+        }
+
+        override fun writeLong(offset: Int, value: Long) {
+            array.setLongAt(position(offset), value)
+        }
+
+        override fun release() {
+            // does nothing on JVM
+        }
+    }
+
+    override fun writer(): MemoryWriter = writer
+}
+
+/**
+ * Wraps a [Memory] around existing [ByteArray]. This operation is unsafe since the array is not copied
+ * and could be mutated independently from the resulting [Memory].
+ */
+public actual fun Memory.Companion.wrap(array: ByteArray): Memory = NativeMemory(array)
+
+/**
+ * Allocates the most effective platform-specific memory.
+ */
+public actual fun Memory.Companion.allocate(length: Int): Memory {
+    val array = ByteArray(length)
+    return NativeMemory(array)
+}

settings.gradle.kts

@@ -1,15 +1,4 @@
 pluginManagement {
-    val toolsVersion = "0.6.0"
-
-    plugins {
-        id("kotlinx.benchmark") version "0.2.0-dev-20"
-        id("ru.mipt.npm.base") version toolsVersion
-        id("ru.mipt.npm.mpp") version toolsVersion
-        id("ru.mipt.npm.jvm") version toolsVersion
-        id("ru.mipt.npm.publish") version toolsVersion
-        kotlin("plugin.allopen")
-    }
-
     repositories {
         mavenLocal()
         jcenter()
@@ -20,6 +9,19 @@ pluginManagement {
         maven("https://dl.bintray.com/kotlin/kotlinx")
         maven("https://dl.bintray.com/kotlin/kotlin-dev/")
     }
+
+    val toolsVersion = "0.6.1-dev-1.4.20-M1"
+    val kotlinVersion = "1.4.20-M1"
+
+    plugins {
+        id("kotlinx.benchmark") version "0.2.0-dev-20"
+        id("ru.mipt.npm.project") version toolsVersion
+        id("ru.mipt.npm.mpp") version toolsVersion
+        id("ru.mipt.npm.jvm") version toolsVersion
+        id("ru.mipt.npm.publish") version toolsVersion
+        kotlin("jvm")  version kotlinVersion
+        kotlin("plugin.allopen") version kotlinVersion
+    }
 }
 
 rootProject.name = "kmath"
@@ -34,7 +36,6 @@ include(
     ":kmath-commons",
     ":kmath-viktor",
     ":kmath-prob",
-//    ":kmath-io",
     ":kmath-dimensions",
     ":kmath-for-real",
     ":kmath-geometry",