feat: Enable wasm compilation.

Author: scottmarchant

Package.swift

@@ -13,28 +13,30 @@ let package = Package(
         .library(name: "AsyncKit", targets: ["AsyncKit"]),
     ],
     dependencies: [
-        .package(url: "https://github.com/apple/swift-nio.git", from: "2.61.0"),
+        .package(url: "https://github.com/apple/swift-nio.git", from: "2.89.0"),
         .package(url: "https://github.com/apple/swift-log.git", from: "1.5.3"),
         .package(url: "https://github.com/apple/swift-collections.git", from: "1.0.5"),
         .package(url: "https://github.com/apple/swift-algorithms.git", from: "1.1.0"),
+        .package(url: "https://github.com/PassiveLogic/swift-dispatch-async.git", from: "0.0.1"),
     ],
     targets: [
         .target(
             name: "AsyncKit",
             dependencies: [
                 .product(name: "Logging", package: "swift-log"),
                 .product(name: "NIOCore", package: "swift-nio"),
-                .product(name: "NIOEmbedded", package: "swift-nio"),
-                .product(name: "NIOPosix", package: "swift-nio"),
                 .product(name: "Collections", package: "swift-collections"),
                 .product(name: "Algorithms", package: "swift-algorithms"),
+                .product(name: "DispatchAsync", package: "swift-dispatch-async", condition: .when(platforms: [.wasi]))
             ],
             swiftSettings: swiftSettings
         ),
         .testTarget(
             name: "AsyncKitTests",
             dependencies: [
                 .target(name: "AsyncKit"),
+                .product(name: "NIOEmbedded", package: "swift-nio"),
+                .product(name: "NIOPosix", package: "swift-nio"),
             ],
             swiftSettings: swiftSettings
         ),

Sources/AsyncKit/ConnectionPool/EventLoopGroupConnectionPool.swift

@@ -1,4 +1,8 @@
+#if canImport(Dispatch)
 import Dispatch
+#elseif canImport(DispatchAsync)
+import DispatchAsync
+#endif
 import NIOConcurrencyHelpers
 import NIOCore
 import struct Logging.Logger
@@ -280,6 +284,7 @@ public final class EventLoopGroupConnectionPool<Source> where Source: Connection
         }
     }
 
+    #if !os(WASI)
     /// Closes the connection pool.
     ///
     /// All available connections will be closed immediately. Any connections still in use will be
@@ -312,6 +317,7 @@ public final class EventLoopGroupConnectionPool<Source> where Source: Connection
             }
         }
     }
+    #endif  // !os(WASI)
 
     /// Closes the connection pool.
     ///

Sources/AsyncKit/Exports.swift

@@ -1,6 +1,12 @@
+#if canImport(NIOEmbedded)
 @_documentation(visibility: internal) @_exported import class NIOEmbedded.EmbeddedEventLoop
+#endif
 @_documentation(visibility: internal) @_exported import protocol NIOCore.EventLoop
 @_documentation(visibility: internal) @_exported import protocol NIOCore.EventLoopGroup
 @_documentation(visibility: internal) @_exported import class NIOCore.EventLoopFuture
 @_documentation(visibility: internal) @_exported import struct NIOCore.EventLoopPromise
+#if canImport(NIOPosix)
 @_documentation(visibility: internal) @_exported import class NIOPosix.MultiThreadedEventLoopGroup
+#elseif canImport(NIOAsyncRuntime)
+@_documentation(visibility: internal) @_exported import class NIOAsyncRuntime.MultiThreadedEventLoopGroup
+#endif

Tests/AsyncKitTests/ConnectionPoolTests.swift

@@ -4,6 +4,7 @@ import Logging
 import NIOConcurrencyHelpers
 import NIOCore
 import NIOEmbedded
+import class NIOPosix.MultiThreadedEventLoopGroup
 import XCTest
 
 final class ConnectionPoolTests: AsyncKitTestCase {