c/pthread

_demo/thread/thd.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/pthread"
+)
+
+var key pthread.Key
+
+func main() {
+	key.Create(nil)
+	key.Set(c.Pointer(c.Str("main value\n")))
+
+	var thd pthread.Thread
+	pthread.Create(&thd, nil, func(arg c.Pointer) c.Pointer {
+		key.Set(c.Pointer(c.Str("thread value\n")))
+		c.Printf(c.Str("Hello, thread\nTLS: %s"), key.Get())
+		return c.Pointer(c.Str("Back to main\n"))
+	}, nil)
+
+	var retval c.Pointer
+	pthread.Join(thd, &retval)
+
+	c.Printf(c.Str("%sTLS: %s"), retval, key.Get())
+}

c/pthread/pthread.go

@@ -0,0 +1,160 @@
+/*
+ * 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 pthread
+
+import (
+	_ "unsafe"
+
+	"github.com/goplus/llgo/c"
+)
+
+const (
+	LLGoPackage = "decl"
+)
+
+func __noop__() c.Int {
+	return 0
+}
+
+// -----------------------------------------------------------------------------
+
+type aThread struct {
+	Unused [8]byte
+}
+
+// Thread represents a POSIX thread.
+type Thread = *aThread
+
+// The pthread_create() function starts a new thread in the calling
+// process.  The new thread starts execution by invoking
+// start_routine(); arg is passed as the sole argument of
+// start_routine().
+//
+// The new thread terminates in one of the following ways:
+//
+//   - It calls pthread_exit(3), specifying an exit status value that
+//     is available to another thread in the same process that calls
+//     pthread_join(3).
+//
+//   - It returns from start_routine().  This is equivalent to
+//     calling pthread_exit(3) with the value supplied in the return
+//     statement.
+//
+//   - It is canceled (see pthread_cancel(3)).
+//
+//   - Any of the threads in the process calls exit(3), or the main
+//     thread performs a return from main().  This causes the
+//     termination of all threads in the process.
+//
+// On success, pthread_create() returns 0; on error, it returns an
+// error number, and the contents of *thread are undefined.
+//
+// See https://man7.org/linux/man-pages/man3/pthread_create.3.html
+//
+//go:linkname Create C.pthread_create
+func Create(pthread *Thread, attr *Attr, routine func(c.Pointer) c.Pointer, arg c.Pointer) c.Int
+
+// The pthread_join() function waits for the thread specified by
+// thread to terminate.  If that thread has already terminated, then
+// pthread_join() returns immediately.  The thread specified by
+// thread must be joinable.
+//
+// If retval is not NULL, then pthread_join() copies the exit status
+// of the target thread (i.e., the value that the target thread
+// supplied to pthread_exit(3)) into the location pointed to by
+// retval.  If the target thread was canceled, then PTHREAD_CANCELED
+// is placed in the location pointed to by retval.
+//
+// If multiple threads simultaneously try to join with the same
+// thread, the results are undefined.  If the thread calling
+// pthread_join() is canceled, then the target thread will remain
+// joinable (i.e., it will not be detached).
+//
+// See https://man7.org/linux/man-pages/man3/pthread_join.3.html
+//
+//go:linkname Join C.pthread_join
+func Join(thread Thread, retval *c.Pointer) c.Int
+
+// The pthread_exit() function terminates the calling thread and
+// returns a value via retval that (if the thread is joinable) is
+// available to another thread in the same process that calls
+// pthread_join(3).
+//
+// See https://man7.org/linux/man-pages/man3/pthread_exit.3.html
+//
+//go:linkname Exit C.pthread_exit
+func Exit(retval c.Pointer)
+
+// The pthread_cancel() function sends a cancelation request to the
+// thread thread.
+//
+// See https://man7.org/linux/man-pages/man3/pthread_cancel.3.html
+//
+//go:linkname Cancel C.pthread_cancel
+func Cancel(thread Thread) c.Int
+
+// -----------------------------------------------------------------------------
+
+// Attr represents a POSIX thread attributes.
+type Attr struct {
+	Detached byte
+	SsSp     *c.Char
+	SsSize   uintptr
+}
+
+// llgo:link (*Attr).Init C.pthread_attr_init
+func (attr *Attr) Init() c.Int { return 0 }
+
+// llgo:link (*Attr).Destroy C.pthread_attr_destroy
+func (attr *Attr) Destroy() c.Int { return 0 }
+
+// llgo:link (*Attr).GetDetached C.pthread_attr_getdetachstate
+func (attr *Attr) GetDetached(detached *c.Int) c.Int { return 0 }
+
+// llgo:link (*Attr).SetDetached C.pthread_attr_setdetachstate
+func (attr *Attr) SetDetached(detached c.Int) c.Int { return 0 }
+
+// llgo:link (*Attr).GetStackSize C.pthread_attr_getstacksize
+func (attr *Attr) GetStackSize(stackSize *uintptr) c.Int { return 0 }
+
+// llgo:link (*Attr).SetStackSize C.pthread_attr_setstacksize
+func (attr *Attr) SetStackSize(stackSize uintptr) c.Int { return 0 }
+
+// llgo:link (*Attr).GetStackAddr C.pthread_attr_getstackaddr
+func (attr *Attr) GetStackAddr(stackAddr *c.Pointer) c.Int { return 0 }
+
+// llgo:link (*Attr).SetStackAddr C.pthread_attr_setstackaddr
+func (attr *Attr) SetStackAddr(stackAddr c.Pointer) c.Int { return 0 }
+
+// -----------------------------------------------------------------------------
+// Thread Local Storage
+
+type Key c.Uint
+
+// llgo:link (*Key).Create C.pthread_key_create
+func (key *Key) Create(destructor func(c.Pointer)) c.Int { return 0 }
+
+// llgo:link Key.Delete C.pthread_key_delete
+func (key Key) Delete() c.Int { return 0 }
+
+// llgo:link Key.Get C.pthread_getspecific
+func (key Key) Get() c.Pointer { return nil }
+
+// llgo:link Key.Set C.pthread_setspecific
+func (key Key) Set(value c.Pointer) c.Int { return __noop__() }
+
+// -----------------------------------------------------------------------------

ssa/expr.go

@@ -892,32 +892,8 @@ func (b Builder) InlineCall(fn Expr, args ...Expr) (ret Expr) {
 //	t2 = println(t0, t1)
 //	t4 = t3()
 func (b Builder) Call(fn Expr, args ...Expr) (ret Expr) {
-	return b.Do(Call, fn, args...)
-}
-
-type DoAction int
-
-const (
-	Call DoAction = iota
-	Go
-	Defer
-)
-
-// Do call a function with an action.
-func (b Builder) Do(da DoAction, fn Expr, args ...Expr) (ret Expr) {
 	if debugInstr {
-		var b bytes.Buffer
-		name := fn.impl.Name()
-		if name == "" {
-			name = "closure"
-		}
-		fmt.Fprint(&b, "Do ", da, " ", fn.kind, " ", fn.raw.Type, " ", name)
-		sep := ": "
-		for _, arg := range args {
-			fmt.Fprint(&b, sep, arg.impl)
-			sep = ", "
-		}
-		log.Println(b.String())
+		logCall("Call", fn, args)
 	}
 	var kind = fn.kind
 	if kind == vkPyFuncRef {
@@ -948,6 +924,40 @@ func (b Builder) Do(da DoAction, fn Expr, args ...Expr) (ret Expr) {
 	return
 }
 
+func logCall(da string, fn Expr, args []Expr) {
+	var b bytes.Buffer
+	name := fn.impl.Name()
+	if name == "" {
+		name = "closure"
+	}
+	fmt.Fprint(&b, da, " ", fn.kind, " ", fn.raw.Type, " ", name)
+	sep := ": "
+	for _, arg := range args {
+		fmt.Fprint(&b, sep, arg.impl)
+		sep = ", "
+	}
+	log.Println(b.String())
+}
+
+type DoAction int
+
+const (
+	Call DoAction = iota
+	Go
+	Defer
+)
+
+// Do call a function with an action.
+func (b Builder) Do(da DoAction, fn Expr, args ...Expr) (ret Expr) {
+	switch da {
+	case Call:
+		return b.Call(fn, args...)
+	case Go:
+		b.Go(fn, args...)
+	}
+	return
+}
+
 // The Range instruction yields an iterator over the domain and range
 // of X, which must be a string or map.
 //

ssa/stmt_builder.go

@@ -142,6 +142,21 @@ func (b Builder) Unreachable() {
 	b.impl.CreateUnreachable()
 }
 
+// The Go instruction creates a new goroutine and calls the specified
+// function within it.
+//
+// Example printed form:
+//
+//	go println(t0, t1)
+//	go t3()
+//	go invoke t5.Println(...t6)
+func (b Builder) Go(fn Expr, args ...Expr) {
+	if debugInstr {
+		logCall("Go", fn, args)
+	}
+	b.Call(fn, args...)
+}
+
 // Return emits a return instruction.
 func (b Builder) Return(results ...Expr) {
 	if debugInstr {