make runtime compatible with wasm

runtime/internal/lib/syscall/syscall_nonwasm.go

@@ -0,0 +1,57 @@
+//go:build !wasm
+
+package syscall
+
+import (
+	c "github.com/goplus/llgo/runtime/internal/clite"
+	"github.com/goplus/llgo/runtime/internal/clite/os"
+	"github.com/goplus/llgo/runtime/internal/clite/syscall"
+)
+
+type Rlimit syscall.Rlimit
+
+func Getrlimit(which int, lim *Rlimit) (err error) {
+	ret := os.Getrlimit(c.Int(which), (*syscall.Rlimit)(lim))
+	if ret == 0 {
+		return nil
+	}
+	return Errno(ret)
+}
+
+func setrlimit(which int, lim *Rlimit) (err error) {
+	ret := os.Setrlimit(c.Int(which), (*syscall.Rlimit)(lim))
+	if ret == 0 {
+		return nil
+	}
+	return Errno(ret)
+}
+
+func wait4(pid int, wstatus *c.Int, options int, rusage *syscall.Rusage) (wpid int, err error) {
+	ret := os.Wait4(os.PidT(pid), wstatus, c.Int(options), rusage)
+	if ret >= 0 {
+		return int(ret), nil
+	}
+	return 0, Errno(os.Errno())
+}
+
+func fork() (uintptr, Errno) {
+	ret := os.Fork()
+	if ret >= 0 {
+		return uintptr(ret), Errno(0)
+	}
+	return 0, Errno(os.Errno())
+}
+
+func Pipe(p []int) (err error) {
+	if len(p) != 2 {
+		return Errno(syscall.EINVAL)
+	}
+	var q [2]c.Int
+	ret := os.Pipe(&q)
+	if ret == 0 {
+		p[0] = int(q[0])
+		p[1] = int(q[1])
+		return nil
+	}
+	return Errno(ret)
+}