jobs: Ensure releasing event loop

The internal functions blocking threads
for implementing call_sync were not releasing
the event loop, leading to deafness of the
binder.

Include a tuto-4 that reproduce the issue
on a binder with the bug and that also shows
interesting usages of the binder.

Bug-AGL: SPEC-2161

Change-Id: I83ad4d55d721a6046e798a5e06967df4dd5a7284
Signed-off-by: Jose Bollo <jose.bollo@iot.bzh>

3 files changed, 32 insertions, 1 deletions

diff --git a/bindings/tutorial/CMakeLists.txt b/bindings/tutorial/CMakeLists.txt
index 5c19bb85..b45851fe 100644
--- a/bindings/tutorial/CMakeLists.txt
+++ b/bindings/tutorial/CMakeLists.txt
@@ -32,5 +32,6 @@ ENDMACRO(tuto)
 tuto(1 c)
 tuto(2 c)
 tuto(3 cpp)
+tuto(4 c)
 
 tuto(app1 c)
diff --git a/bindings/tutorial/tuto-4.c b/bindings/tutorial/tuto-4.c
new file mode 100644
index 00000000..cb909fd0
--- /dev/null
+++ b/bindings/tutorial/tuto-4.c
@@ -0,0 +1,29 @@
+#define AFB_BINDING_VERSION 3
+#include <afb/afb-binding.h>
+
+void hello(afb_req_t req)
+{
+	AFB_REQ_DEBUG(req, "hello world");
+	afb_req_reply(req, NULL, NULL, "hello world");
+}
+
+const afb_verb_t verbs[] = {
+	{ .verb="hello", .callback=hello },
+	{ .verb=NULL }
+};
+
+
+static int init(afb_api_t api)
+{
+	int rc = afb_api_require_api(api, "hello", 1);
+	if (!rc)
+		rc = afb_api_call_sync(api, "hello", "ping", NULL, NULL, NULL, NULL);
+	return rc;
+}
+
+const afb_binding_t afbBindingExport = {
+	.api = "tuto-4",
+	.verbs = verbs,
+	.init = init
+};
+
diff --git a/src/jobs.c b/src/jobs.c
index 4a88c303..d06d24cf 100644
--- a/src/jobs.c
+++ b/src/jobs.c
@@ -337,7 +337,7 @@ static void evloop_release()
 {
 	struct thread *nh, *ct = current_thread;
 
-	if (evloop.holder == ct) {
+	if (ct && evloop.holder == ct) {
 		nh = ct->nholder;
 		evloop.holder = nh;
 		if (nh)
@@ -397,6 +397,7 @@ static void evloop_acquire()
  */
 static void thread_enter(volatile struct thread *me)
 {
+	evloop_release();
 	/* initialize description of itself and link it in the list */
 	me->tid = pthread_self();
 	me->stop = 0;