cgo test dir

Change-Id: Id4c17b85124c40b00e3c88b7d052c2158bfb79a5

misc/cgo/Makefile

@@ -0,0 +1,13 @@
+include $(GOROOT)/src/Make.inc
+
+TARG=camdev/ctest
+
+CGOFILES=\
+        callback.go\
+
+CGO_OFILES=\
+        callback_c.o\
+
+include $(GOROOT)/src/Make.pkg
+
+

misc/cgo/callback.go

@@ -0,0 +1,22 @@
+package ctest
+
+/*
+#include <stdlib.h>
+
+#include "cstuff.h"
+*/
+import "C"
+
+import "unsafe"
+
+//export GoFoo
+func GoFoo(c *C.char) {
+	gstr := C.GoString(c)
+	println("I AM GO", gstr)
+}
+
+func CallC(s string) {
+	cstr := C.CString(s)
+	defer C.free(unsafe.Pointer(cstr))
+	C.CFoo(cstr)
+}

misc/cgo/callback_c.c

@@ -0,0 +1,4 @@
+int CFoo(const char* c) {
+  GoFoo(c);
+}
+

misc/cgo/cstuff.h

@@ -0,0 +1 @@
+extern void CFoo(const char* c);

misc/cgo/main.go

@@ -0,0 +1,6 @@
+package main
+
+func main() {
+	CallC()
+}
+

misc/cgo/use.go

@@ -0,0 +1,10 @@
+package main
+
+import (
+	"camdev/ctest"
+)
+
+func main() {
+	ctest.CallC("foo")
+}
+