async: work both go and llgo

x/async/_demo/monad/monad.go

@@ -5,7 +5,6 @@ import (
 	"os"
 	"time"
 
-	"github.com/goplus/llgo/c"
 	"github.com/goplus/llgo/x/async"
 	"github.com/goplus/llgo/x/async/timeout"
 	"github.com/goplus/llgo/x/tuple"
@@ -31,10 +30,9 @@ func WriteFile(fileName string, content []byte) async.IO[error] {
 
 func sleep(i int, d time.Duration) async.IO[int] {
 	return async.Async(func(resolve func(int)) {
-		go func() {
+		async.BindIO(timeout.Timeout(d), func(async.Void) {
-			c.Usleep(c.Uint(d.Microseconds()))
 			resolve(i)
-		}()
+		})
 	})
 }
 
@@ -46,6 +44,8 @@ func main() {
 }
 
 func RunIO() {
+	println("RunIO with Await")
+
 	async.Run(func() {
 		content, err := async.Await(ReadFile("1.txt")).Get()
 		if err != nil {
@@ -62,6 +62,7 @@ func RunIO() {
 	})
 
 	// Translated to in Go+:
+	println("RunIO with BindIO")
 
 	async.Run(func() {
 		async.BindIO(ReadFile("1.txt"), func(v tuple.Tuple2[[]byte, error]) {
@@ -84,30 +85,42 @@ func RunIO() {
 }
 
 func RunAllAndRace() {
+	ms100 := 100 * time.Millisecond
+	ms200 := 200 * time.Millisecond
+	ms300 := 300 * time.Millisecond
+
+	println("Run All with Await")
+
 	async.Run(func() {
-		all := async.All(sleep(1, time.Second), sleep(2, time.Second*2), sleep(3, time.Second*3))
+		all := async.All(sleep(1, ms200), sleep(2, ms100), sleep(3, ms300))
 		async.BindIO(all, func(v []int) {
 			fmt.Printf("All: %v\n", v)
 		})
 	})
 
+	println("Run Race with Await")
+
 	async.Run(func() {
-		first := async.Race(sleep(1, time.Second), sleep(2, time.Second*2), sleep(3, time.Second*3))
+		first := async.Race(sleep(1, ms200), sleep(2, ms100), sleep(3, ms300))
 		v := async.Await(first)
 		fmt.Printf("Race: %v\n", v)
 	})
 
 	// Translated to in Go+:
 
+	println("Run All with BindIO")
+
 	async.Run(func() {
-		all := async.All(sleep(1, time.Second), sleep(2, time.Second*2), sleep(3, time.Second*3))
+		all := async.All(sleep(1, ms200), sleep(2, ms100), sleep(3, ms300))
 		async.BindIO(all, func(v []int) {
 			fmt.Printf("All: %v\n", v)
 		})
 	})
 
+	println("Run Race with BindIO")
+
 	async.Run(func() {
-		first := async.Race(sleep(1, time.Second), sleep(2, time.Second*2), sleep(3, time.Second*3))
+		first := async.Race(sleep(1, ms200), sleep(2, ms100), sleep(3, ms300))
 		async.BindIO(first, func(v int) {
 			fmt.Printf("Race: %v\n", v)
 		})
@@ -115,17 +128,21 @@ func RunAllAndRace() {
 }
 
 func RunTimeout() {
+	println("Run Timeout with Await")
+
 	async.Run(func() {
-		fmt.Printf("Start 1 second timeout\n")
+		fmt.Printf("Start 100 ms timeout\n")
-		async.Await(timeout.Timeout(1 * time.Second))
+		async.Await(timeout.Timeout(100 * time.Millisecond))
 		fmt.Printf("timeout\n")
 	})
 
 	// Translated to in Go+:
 
+	println("Run Timeout with BindIO")
+
 	async.Run(func() {
-		fmt.Printf("Start 1 second timeout\n")
+		fmt.Printf("Start 100 ms timeout\n")
-		async.BindIO(timeout.Timeout(1*time.Second), func(async.Void) {
+		async.BindIO(timeout.Timeout(100*time.Millisecond), func(async.Void) {
 			fmt.Printf("timeout\n")
 		})
 	})

x/async/async.go

@@ -17,11 +17,7 @@
 package async
 
 import (
-	"context"
-	"unsafe"
 	_ "unsafe"
-
-	"github.com/goplus/llgo/c/libuv"
 )
 
 type Void = [0]byte
@@ -30,16 +26,13 @@ type Future[T any] func() T
 
 type IO[T any] func(e *AsyncContext) Future[T]
 
-type Chain[T any] func(callback func(T))
+type AsyncContext struct {
-
+	*Executor
-func (f Future[T]) Do(callback func(T)) {
+	complete func()
-	callback(f())
 }
 
-type AsyncContext struct {
+func (ctx *AsyncContext) Complete() {
-	context.Context
+	ctx.complete()
-	*Executor
-	Complete func()
 }
 
 func Async[T any](fn func(resolve func(T))) IO[T] {
@@ -53,93 +46,9 @@ func Async[T any](fn func(resolve func(T))) IO[T] {
 		})
 		return func() T {
 			if !done {
-				panic("AsyncIO: Future accessed before completion")
+				panic("async.Async: Future accessed before completion")
 			}
 			return result
 		}
 	}
 }
-
-type bindAsync struct {
-	libuv.Async
-	cb func()
-}
-
-func BindIO[T any](call IO[T], callback func(T)) {
-	loop := Exec().L
-	a := &bindAsync{}
-	loop.Async(&a.Async, func(p *libuv.Async) {
-		(*bindAsync)(unsafe.Pointer(p)).cb()
-	})
-	ctx := &AsyncContext{
-		Context:  context.Background(),
-		Executor: Exec(),
-		Complete: func() {
-			a.Async.Send()
-		},
-	}
-	f := call(ctx)
-	a.cb = func() {
-		a.Async.Close(nil)
-		result := f()
-		callback(result)
-	}
-}
-
-// -----------------------------------------------------------------------------
-
-func Await[T1 any](call IO[T1]) (ret T1) {
-	ch := make(chan struct{})
-	f := call(&AsyncContext{
-		Context:  context.Background(),
-		Executor: Exec(),
-		Complete: func() {
-			close(ch)
-		},
-	})
-	<-ch
-	return f()
-}
-
-func Race[T1 any](calls ...IO[T1]) IO[T1] {
-	return Async(func(resolve func(T1)) {
-		done := false
-		for _, call := range calls {
-			var f Future[T1]
-			f = call(&AsyncContext{
-				Context:  context.Background(),
-				Executor: Exec(),
-				Complete: func() {
-					if done {
-						return
-					}
-					done = true
-					resolve(f())
-				},
-			})
-		}
-	})
-}
-
-func All[T1 any](calls ...IO[T1]) IO[[]T1] {
-	return Async(func(resolve func([]T1)) {
-		n := len(calls)
-		results := make([]T1, n)
-		done := 0
-		for i, call := range calls {
-			i := i
-			var f Future[T1]
-			f = call(&AsyncContext{
-				Context:  context.Background(),
-				Executor: Exec(),
-				Complete: func() {
-					results[i] = f()
-					done++
-					if done == n {
-						resolve(results)
-					}
-				},
-			})
-		}
-	})
-}

x/async/async_go.go

@@ -0,0 +1,91 @@
+//go:build !llgo
+// +build !llgo
+
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package async
+
+import "sync"
+
+func BindIO[T any](call IO[T], callback func(T)) {
+	callback(Await(call))
+}
+
+func Await[T1 any](call IO[T1]) (ret T1) {
+	ch := make(chan struct{})
+	f := call(&AsyncContext{
+		Executor: Exec(),
+		complete: func() {
+			close(ch)
+		},
+	})
+	<-ch
+	return f()
+}
+
+// -----------------------------------------------------------------------------
+
+func Race[T1 any](calls ...IO[T1]) IO[T1] {
+	return Async(func(resolve func(T1)) {
+		ch := make(chan int, len(calls))
+		futures := make([]Future[T1], len(calls))
+		for i, call := range calls {
+			i := i
+			call := call
+			go func() {
+				f := call(&AsyncContext{
+					Executor: Exec(),
+					complete: func() {
+						defer func() {
+							_ = recover()
+						}()
+						ch <- i
+					},
+				})
+				futures[i] = f
+			}()
+		}
+		i := <-ch
+		close(ch)
+		resolve(futures[i]())
+	})
+}
+
+func All[T1 any](calls ...IO[T1]) IO[[]T1] {
+	return Async(func(resolve func([]T1)) {
+		n := len(calls)
+		results := make([]T1, n)
+		futures := make([]Future[T1], n)
+		wg := sync.WaitGroup{}
+		wg.Add(n)
+		for i, call := range calls {
+			i := i
+			f := call(&AsyncContext{
+				Executor: Exec(),
+				complete: func() {
+					wg.Done()
+				},
+			})
+			futures[i] = f
+		}
+		wg.Wait()
+		for i, f := range futures {
+			results[i] = f()
+		}
+		resolve(results)
+	})
+}

x/async/async_llgo.go

@@ -0,0 +1,113 @@
+//go:build llgo
+// +build llgo
+
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package async
+
+import (
+	"sync/atomic"
+	"unsafe"
+
+	"github.com/goplus/llgo/c/libuv"
+)
+
+type bindAsync struct {
+	libuv.Async
+	cb func()
+}
+
+func BindIO[T any](call IO[T], callback func(T)) {
+	loop := Exec().L
+	a := &bindAsync{}
+	loop.Async(&a.Async, func(p *libuv.Async) {
+		(*bindAsync)(unsafe.Pointer(p)).cb()
+	})
+	done := atomic.Bool{}
+	ctx := &AsyncContext{
+		Executor: Exec(),
+		complete: func() {
+			done.Store(true)
+			a.Async.Send()
+		},
+	}
+	f := call(ctx)
+	called := false
+	a.cb = func() {
+		if called {
+			return
+		}
+		a.Async.Close(nil)
+		result := f()
+		callback(result)
+	}
+	// don't delay the callback if the future is already done
+	if done.Load() {
+		called = true
+		a.cb()
+	}
+}
+
+func Await[T1 any](call IO[T1]) (ret T1) {
+	BindIO(call, func(v T1) {
+		ret = v
+	})
+	return
+}
+
+// -----------------------------------------------------------------------------
+
+func Race[T1 any](calls ...IO[T1]) IO[T1] {
+	return Async(func(resolve func(T1)) {
+		done := false
+		for _, call := range calls {
+			var f Future[T1]
+			f = call(&AsyncContext{
+				Executor: Exec(),
+				complete: func() {
+					if done {
+						return
+					}
+					done = true
+					resolve(f())
+				},
+			})
+		}
+	})
+}
+
+func All[T1 any](calls ...IO[T1]) IO[[]T1] {
+	return Async(func(resolve func([]T1)) {
+		n := len(calls)
+		results := make([]T1, n)
+		done := 0
+		for i, call := range calls {
+			i := i
+			var f Future[T1]
+			f = call(&AsyncContext{
+				Executor: Exec(),
+				complete: func() {
+					results[i] = f()
+					done++
+					if done == n {
+						resolve(results)
+					}
+				},
+			})
+		}
+	})
+}

x/async/executor_go.go

@@ -0,0 +1,33 @@
+//go:build !llgo
+// +build !llgo
+
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package async
+
+var exec = &Executor{}
+
+type Executor struct {
+}
+
+func Exec() *Executor {
+	return exec
+}
+
+func Run(fn func()) {
+	fn()
+}

x/async/executor_llgo.go

@@ -1,3 +1,6 @@
+//go:build llgo
+// +build llgo
+
 /*
  * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
  *
@@ -56,4 +59,5 @@ func Run(fn func()) {
 	fn()
 	exec.Run()
 	loop.Close()
+	setExec(nil)
 }

x/async/timeout/timeout_go.go

@@ -0,0 +1,35 @@
+//go:build !llgo
+// +build !llgo
+
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package timeout
+
+import (
+	"time"
+
+	"github.com/goplus/llgo/x/async"
+)
+
+func Timeout(d time.Duration) async.IO[async.Void] {
+	return async.Async(func(resolve func(async.Void)) {
+		go func() {
+			time.Sleep(d)
+			resolve(async.Void{})
+		}()
+	})
+}

x/async/timeout/timeout_llgo.go

@@ -0,0 +1,44 @@
+//go:build llgo
+// +build llgo
+
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package timeout
+
+import (
+	"time"
+
+	"github.com/goplus/llgo/c/libuv"
+	"github.com/goplus/llgo/x/async"
+	"github.com/goplus/llgo/x/cbind"
+)
+
+func Timeout(d time.Duration) async.IO[async.Void] {
+	return async.Async(func(resolve func(async.Void)) {
+		t, _ := cbind.Bind[libuv.Timer](func() {
+			resolve(async.Void{})
+		})
+		r := libuv.InitTimer(async.Exec().L, t)
+		if r != 0 {
+			panic("InitTimer failed")
+		}
+		r = t.Start(cbind.Callback[libuv.Timer], uint64(d/time.Millisecond), 0)
+		if r != 0 {
+			panic("Start failed")
+		}
+	})
+}

x/cbind/buf.go

@@ -0,0 +1,12 @@
+package cbind
+
+import "unsafe"
+
+type slice struct {
+	data unsafe.Pointer
+	len  int
+}
+
+func GoBytes(buf *int8, n int) []byte {
+	return *(*[]byte)(unsafe.Pointer(&slice{unsafe.Pointer(buf), n}))
+}

x/cbind/cbind.go

@@ -16,7 +16,21 @@
 
 package cbind
 
-import "unsafe"
+import (
+	"unsafe"
+)
+
+// llgo:type C
+type Cb[T any] func(*T)
+
+// llgo:type C
+type Cb1[T any, A any] func(*T, A)
+
+// llgo:type C
+type Cb2[T any, A any, B any] func(*T, A, B)
+
+// llgo:type C
+type Cb3[T any, A any, B any, C any] func(*T, A, B, C)
 
 type bind[Base any] struct {
 	b  Base
@@ -38,50 +52,75 @@ type bind3[Base any, A any, B any, C any] struct {
 	fn func(A, B, C)
 }
 
-func callback[Base any](b *Base) {
+func Callback[Base any](b *Base) {
 	bind := (*bind[Base])(unsafe.Pointer(b))
 	bind.fn()
 }
 
-func callback1[Base any, A any](b *Base, a A) {
+func Callback1[Base any, A any](b *Base, a A) {
 	bind := (*bind1[Base, A])(unsafe.Pointer(b))
 	bind.fn(a)
 }
 
-func callback2[Base any, A any, B any](b *Base, a A, c B) {
+func Callback2[Base any, A any, B any](b *Base, a A, c B) {
 	bind := (*bind2[Base, A, B])(unsafe.Pointer(b))
 	bind.fn(a, c)
 }
 
-func callback3[Base any, A any, B any, C any](b *Base, a A, c B, d C) {
+func Callback3[Base any, A any, B any, C any](b *Base, a A, c B, d C) {
 	bind := (*bind3[Base, A, B, C])(unsafe.Pointer(b))
 	bind.fn(a, c, d)
 }
 
-func Bind[T any](call func()) (p *T, fn func(*T)) {
+/**
+ * Bind[N] binds a Go function to a C callback function.
+ *
+ * Example:
+ *
+ * timer, cb := cbind.Bind[libuv.Timer](func() {
+ * 	 println("hello")
+ * })
+ * libuv.InitTimer(async.Exec().L, timer)
+ * timer.Start(cb, 1000, 0)
+ *
+ * TODO(lijie): fn isn't a C func-ptr, it's closure, should fix the LLGo compiler.
+ * See: https://github.com/goplus/llgo/issues/766
+ *
+ * Workaround:
+ *
+ * timer, _ := cbind.Bind[libuv.Timer](func() {
+ * 	 println("hello")
+ * })
+ * libuv.InitTimer(async.Exec().L, timer)
+ * timer.Start(cbind.Callback[libuv.Timer], 1000, 0)
+ *
+ * @param call The Go function to bind.
+ * @return The data pointer and the C callback function.
+ */
+func Bind[T any](call func()) (p *T, fn Cb[T]) {
 	bb := &bind[T]{fn: func() { call() }}
 	p = (*T)(unsafe.Pointer(bb))
-	fn = callback[T]
+	fn = Callback[T]
 	return
 }
 
-func Bind1[T any, A any](call func(A)) (p *T, fn func(*T, A)) {
+func Bind1[T any, A any](call func(A)) (p *T, fn Cb1[T, A]) {
 	bb := &bind1[T, A]{fn: func(a A) { call(a) }}
 	p = (*T)(unsafe.Pointer(bb))
-	fn = callback1[T, A]
+	fn = Callback1[T, A]
 	return
 }
 
-func Bind2[T any, A any, B any](call func(A, B)) (p *T, fn func(*T, A, B)) {
+func Bind2[T any, A any, B any](call func(A, B)) (p *T, fn Cb2[T, A, B]) {
 	bb := &bind2[T, A, B]{fn: func(a A, b B) { call(a, b) }}
 	p = (*T)(unsafe.Pointer(bb))
-	fn = callback2[T, A, B]
+	fn = Callback2[T, A, B]
 	return
 }
 
-func Bind3[T any, A any, B any, C any](call func(A, B, C), a A, b B, c C) (p *T, fn func(*T, A, B, C)) {
+func Bind3[T any, A any, B any, C any](call func(A, B, C), a A, b B, c C) (p *T, fn Cb3[T, A, B, C]) {
 	bb := &bind3[T, A, B, C]{fn: func(a A, b B, c C) { call(a, b, c) }}
 	p = (*T)(unsafe.Pointer(bb))
-	fn = callback3[T, A, B, C]
+	fn = Callback3[T, A, B, C]
 	return
 }

x/io/io.go

@@ -1,3 +1,6 @@
+//go:build llgo
+// +build llgo
+
 /*
  * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
  *
@@ -29,7 +32,7 @@ import (
 )
 
 type Tcp struct {
-	tcp *libuv.Tcp
+	tcp libuv.Tcp
 }
 
 type libuvError libuv.Errno
@@ -40,8 +43,8 @@ func (e libuvError) Error() string {
 }
 
 func NewTcp() *Tcp {
-	t := &Tcp{&libuv.Tcp{}}
+	t := &Tcp{}
-	libuv.InitTcp(async.Exec().L, t.tcp)
+	libuv.InitTcp(async.Exec().L, &t.tcp)
 	return t
 }
 
@@ -52,41 +55,40 @@ func (t *Tcp) Bind(addr *net.SockAddr, flags uint) error {
 	return nil
 }
 
-func (t *Tcp) Listen(backlog int, cb libuv.ConnectionCb) error {
+func (t *Tcp) Listen(backlog int, cb func(server *libuv.Stream, status c.Int)) error {
-	if res := (*libuv.Stream)(t.tcp).Listen(c.Int(backlog), cb); res != 0 {
+	if res := (*libuv.Stream)(&t.tcp).Listen(c.Int(backlog), cb); res != 0 {
 		return libuvError(res)
 	}
 	return nil
 }
 
 func (t *Tcp) Accept() (client *Tcp, err error) {
-	tcp := &libuv.Tcp{}
+	tcp := &Tcp{}
-	if res := libuv.InitTcp(async.Exec().L, tcp); res != 0 {
+	if res := libuv.InitTcp(async.Exec().L, &tcp.tcp); res != 0 {
 		return nil, libuvError(res)
 	}
-	if res := (*libuv.Stream)(t.tcp).Accept((*libuv.Stream)(client.tcp)); res != 0 {
+	if res := (*libuv.Stream)(&t.tcp).Accept((*libuv.Stream)(&tcp.tcp)); res != 0 {
 		return nil, libuvError(res)
 	}
-	return &Tcp{tcp}, nil
+	return tcp, nil
 }
 
 func Connect(addr *net.SockAddr) async.IO[tuple.Tuple2[*Tcp, error]] {
 	return async.Async(func(resolve func(tuple.Tuple2[*Tcp, error])) {
-		tcp := &libuv.Tcp{}
+		tcp := &Tcp{}
-		if res := libuv.InitTcp(async.Exec().L, tcp); res != 0 {
+		if res := libuv.InitTcp(async.Exec().L, &tcp.tcp); res != 0 {
 			resolve(tuple.T2[*Tcp, error]((*Tcp)(nil), libuvError(res)))
 			return
 		}
-		req, cb := cbind.Bind1[libuv.Connect](func(status c.Int) {
+		req, _ := cbind.Bind1[libuv.Connect](func(status c.Int) {
 			if status != 0 {
 				resolve(tuple.T2[*Tcp, error]((*Tcp)(nil), libuvError(libuv.Errno(status))))
-			} else {
-				resolve(tuple.T2[*Tcp, error](&Tcp{tcp}, nil))
 			}
 		})
-		if res := libuv.TcpConnect(req, tcp, addr, cb); res != 0 {
+		if res := libuv.TcpConnect(req, &tcp.tcp, addr, cbind.Callback1[libuv.Connect, c.Int]); res != 0 {
 			resolve(tuple.T2[*Tcp, error]((*Tcp)(nil), libuvError(res)))
 		}
+		resolve(tuple.T2[*Tcp, error](tcp, nil))
 	})
 }
 
@@ -95,23 +97,14 @@ func allocBuffer(handle *libuv.Handle, suggestedSize uintptr, buf *libuv.Buf) {
 	buf.Len = suggestedSize
 }
 
-type slice struct {
-	data unsafe.Pointer
-	len  int
-}
-
-func goBytes(buf *int8, n int) []byte {
-	return *(*[]byte)(unsafe.Pointer(&slice{unsafe.Pointer(buf), n}))
-}
-
 func (t *Tcp) Read() async.IO[tuple.Tuple2[[]byte, error]] {
 	return func(ctx *async.AsyncContext) async.Future[tuple.Tuple2[[]byte, error]] {
 		var result tuple.Tuple2[[]byte, error]
 		var done bool
-		tcp := (*libuv.Stream)(t.tcp)
+		tcp := (*libuv.Stream)(&t.tcp)
-		libuv.ReadStart(tcp, allocBuffer, func(client *libuv.Stream, nread c.Long, buf *libuv.Buf) {
+		tcp.StartRead(allocBuffer, func(client *libuv.Stream, nread c.Long, buf *libuv.Buf) {
 			if nread > 0 {
-				result = tuple.T2[[]byte, error](goBytes(buf.Base, int(nread)), nil)
+				result = tuple.T2[[]byte, error](cbind.GoBytes(buf.Base, int(nread)), nil)
 			} else if nread < 0 {
 				result = tuple.T2[[]byte, error](nil, libuvError(libuv.Errno(nread)))
 			} else {
@@ -129,6 +122,6 @@ func (t *Tcp) Read() async.IO[tuple.Tuple2[[]byte, error]] {
 	}
 }
 
-func (t *Tcp) Close(cb libuv.CloseCb) {
+func (t *Tcp) Close() {
-	(*libuv.Handle)(unsafe.Pointer(t.tcp)).Close(cb)
+	(*libuv.Handle)(unsafe.Pointer(&t.tcp)).Close(nil)
 }