Merge pull request #504 from xushiwei/q

c.AllocaCStrs; ssa: AllocaU/ArrayAlloca/Times/AllocaCStrs; cl/_testlibc: allocacstrs; demo: sysexec

_demo/_timeout/timer.go

@@ -1,19 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"time"
-)
-
-var c chan int
-
-func handle(int) {}
-
-func main() {
-	select {
-	case m := <-c:
-		handle(m)
-	case <-time.After(10 * time.Second):
-		fmt.Println("timed out")
-	}
-}

_demo/cexec/exec.go

@@ -1,20 +1,11 @@
 package main
 
 import (
-	"runtime"
-	"unsafe"
-
 	"github.com/goplus/llgo/c"
 	"github.com/goplus/llgo/c/os"
 )
 
 func main() {
 	ls := c.Str("ls")
-	args := []*c.Char{ls, c.Str("-l"), nil}
-	if runtime.GOOS == "windows" {
-		ls = c.Str("dir")
-		args = []*c.Char{ls, nil}
-	}
-
-	os.Execvp(ls, unsafe.SliceData(args))
+	os.Execlp(ls, ls, c.Str("-l"), nil)
 }

_demo/chandemo/chan.go

@@ -1,21 +0,0 @@
-package main
-
-func main() {
-	c1 := make(chan string)
-	c2 := make(chan string, 1)
-	go func() {
-		c1 <- "ch1"
-	}()
-	go func() {
-		c2 <- "ch2"
-	}()
-
-	for i := 0; i < 2; i++ {
-		select {
-		case msg1 := <-c1:
-			println(msg1)
-		case msg2 := <-c2:
-			println(msg2)
-		}
-	}
-}

_demo/sysexec/exec.go

@@ -9,10 +9,10 @@ import (
 
 func main() {
 	ls := "ls"
-	args := []string{"ls", "-l"}
+	args := []string{ls, "-l"}
 	if runtime.GOOS == "windows" {
 		ls = "dir"
-		args = nil
+		args = []string{ls}
 	}
 	lspath, _ := exec.LookPath(ls)
 	if lspath != "" {