Implement new syscall package.

Calls to library functions now use entersyscall and
exitsyscall as appropriate.  This is a first step toward
multiplexing goroutines onto threads.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@180345 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 21 insertions, 0 deletions

diff --git a/libgo/go/syscall/libcall_waitpid.go b/libgo/go/syscall/libcall_waitpid.go
new file mode 100644
index 00000000000..014446307e3
--- /dev/null
+++ b/libgo/go/syscall/libcall_waitpid.go
@@ -0,0 +1,21 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// For systems with the waitpid library call.
+
+package syscall
+
+//sys	waitpid(pid Pid_t, status *int, options int) (wpid Pid_t, errno int)
+//waitpid(pid Pid_t, status *int, options int) Pid_t
+
+func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, errno int) {
+	var status int
+	r, err := waitpid(Pid_t(pid), &status, options)
+	wpid = int(r)
+	errno = err
+	if wstatus != nil {
+		*wstatus = WaitStatus(status)
+	}
+	return
+}