app/main: dispatch wayland events using ping(), WIP on split layout

* Dispatch ayland events with ping() API call, after having read events
  from wayland fd - in order to prevent indefinite-poll on wrongly read+
  dispatch from multiple threads (dispatcher and API call).
* Add scope trace to all API call thunks.
* Split layout advancements, still broken AF though.
* Add App1 example split layout to App layer.

Signed-off-by: Marcus Fritzsch <marcus_fritzsch@mentor.com>

1 files changed, 14 insertions, 5 deletions

diff --git a/src/main.cpp b/src/main.cpp
index d944c24..4bb53b3 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -30,7 +30,7 @@ extern "C" {
 }
 
 namespace {
-std::mutex binding_m;
+//std::mutex binding_m;
 
 struct afb_instance {
    std::unique_ptr<wl::display> display;
@@ -51,9 +51,10 @@ int afb_instance::init() {
    return this->app.init();
 }
 
-int display_event_callback(sd_event_source *evs, int /*fd*/, uint32_t events,
+int display_event_callback(sd_event_source *evs, int fd, uint32_t events,
                            void * /*data*/) {
-   std::lock_guard<std::mutex> guard(binding_m);
+   ST();
+   // std::lock_guard<std::mutex> guard(binding_m);
 
    if ((events & EPOLLHUP) != 0) {
       logerror("The compositor hung up, dying now.");
@@ -63,8 +64,16 @@ int display_event_callback(sd_event_source *evs, int /*fd*/, uint32_t events,
    }
 
    if ((events & EPOLLIN) != 0u) {
-      if (g_afb_instance->app.dispatch_events() == -1) {
-         goto error;
+      {
+         STN(display_read_events);
+         g_afb_instance->app.display->read_events();
+         g_afb_instance->app.pending_events.store(true, std::memory_order_release);
+      }
+      {
+         STN(winman_ping_api_call);
+         afb_service_call("winman", "ping", json_object_new_object(), [](void *c, int st,  json_object* j) {
+            STN(winman_ping_api_call_return);
+         }, nullptr);
       }
    }