Initial commit: Go 1.23 release state

src/cmd/cgo/internal/testcarchive/testdata/libgo4/libgo4.go

@@ -0,0 +1,55 @@
+// Copyright 2015 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.
+
+package main
+
+/*
+#include <signal.h>
+#include <pthread.h>
+
+// Raise SIGIO.
+static void CRaiseSIGIO(pthread_t* p) {
+	pthread_kill(*p, SIGIO);
+}
+*/
+import "C"
+
+import (
+	"os"
+	"os/signal"
+	"sync/atomic"
+	"syscall"
+)
+
+var sigioCount int32
+
+// Catch SIGIO.
+//
+//export GoCatchSIGIO
+func GoCatchSIGIO() {
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, syscall.SIGIO)
+	go func() {
+		for range c {
+			atomic.AddInt32(&sigioCount, 1)
+		}
+	}()
+}
+
+// Raise SIGIO.
+//
+//export GoRaiseSIGIO
+func GoRaiseSIGIO(p *C.pthread_t) {
+	C.CRaiseSIGIO(p)
+}
+
+// Return the number of SIGIO signals seen.
+//
+//export SIGIOCount
+func SIGIOCount() C.int {
+	return C.int(atomic.LoadInt32(&sigioCount))
+}
+
+func main() {
+}