runtime: convert sigqueue to Go
LGTM=rsc
R=golang-codereviews, rsc
CC=golang-codereviews, khr
https://golang.org/cl/132090043
diff --git a/src/pkg/runtime/sigqueue.go b/src/pkg/runtime/sigqueue.go
new file mode 100644
index 0000000..5976e57
--- /dev/null
+++ b/src/pkg/runtime/sigqueue.go
@@ -0,0 +1,42 @@
+// 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.
+
+// This file implements runtime support for signal handling.
+
+package runtime
+
+func signal_recv() (m uint32) {
+ for {
+ mp := acquirem()
+ onM(&signal_recv_m)
+ ok := mp.scalararg[0] != 0
+ m = uint32(mp.scalararg[1])
+ releasem(mp)
+ if ok {
+ return
+ }
+ gonotetsleepg(&signote, -1)
+ gonoteclear(&signote)
+ }
+}
+
+func signal_enable(s uint32) {
+ mp := acquirem()
+ mp.scalararg[0] = uint(s)
+ onM(&signal_enable_m)
+ releasem(mp)
+}
+
+func signal_disable(s uint32) {
+ mp := acquirem()
+ mp.scalararg[0] = uint(s)
+ onM(&signal_disable_m)
+ releasem(mp)
+}
+
+var (
+ signal_recv_m,
+ signal_enable_m,
+ signal_disable_m mFunction
+)
