From 869c528ee82fc8c2e2877d67521e26c3a2ca47ca Mon Sep 17 00:00:00 2001
From: Kazumasa Mitsunari <knimitz@witz-inc.co.jp>
Date: Fri, 22 Dec 2017 12:28:21 +0900
Subject: [PATCH] Enable an application re-launch

When an application dies after requestSurface,
the application can't be launched because
Window Manager doesn't know the application is dead and doesn't
clean up its database.

In other case, when Mixer app dies due to pulse audio crash
just before Window Manager handles surface memory,
the connection between weston and Window Manager is dead.

So add following
* Add context setting with window manager clients.
  Terminate the context and clean up WM database
  if a client application is dead.
* Add layout_commit() after add surfaces to layer.

[PatchSet 2]
* Add layout_commit() after add surfaces to layer
  in api_request_surface

Bug-AGL: SPEC-1086

Change-Id: I6ecae2606ac644e49a3383ba849390f8c235f187
Signed-off-by: Kazumasa Mitsunari <knimitz@witz-inc.co.jp>
---
 src/app.cpp  |  3 ++-
 src/main.cpp | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 56 insertions(+), 1 deletion(-)

diff --git a/src/app.cpp b/src/app.cpp
index 74a114d..337b0ac 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -629,7 +629,7 @@ void App::surface_created(uint32_t surface_id) {
 
    this->controller->layers[*layer_id]->add_surface(
       this->controller->surfaces[surface_id].get());
-
+   this->layout_commit();
    // activate the main_surface right away
    /*if (surface_id == static_cast<unsigned>(this->layers.main_surface)) {
       HMI_DEBUG("wm", "Activating main_surface (%d)", surface_id);
@@ -736,6 +736,7 @@ char const *App::api_request_surface(char const *drawing_name,
 
    this->controller->layers[*lid]->add_surface(
        this->controller->surfaces[sid].get());
+   this->layout_commit();
 
    return nullptr;
 }
diff --git a/src/main.cpp b/src/main.cpp
index e8ae75a..0197c3c 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -30,6 +30,13 @@ extern "C" {
 #include <systemd/sd-event.h>
 }
 
+typedef struct wmClientCtxt{
+    std::string name;
+    wmClientCtxt(const char* appName){
+        name = appName;
+    }
+} wmClientCtxt;
+
 struct afb_instance {
    std::unique_ptr<wl::display> display;
    wm::App app;
@@ -149,6 +156,30 @@ int binding_init() noexcept {
    return -1;
 }
 
+static bool checkFirstReq(afb_req req){
+    wmClientCtxt* ctxt = (wmClientCtxt*)afb_req_context_get(req);
+    return (ctxt) ? false : true;
+}
+
+static void cbRemoveClientCtxt(void* data){
+    wmClientCtxt* ctxt = (wmClientCtxt*)data;
+    if(ctxt == nullptr){
+        return;
+    }
+    HMI_DEBUG("wm","remove app %s", ctxt->name.c_str());
+    // Lookup surfaceID and remove it because App is dead.
+    auto pSid = g_afb_instance->app.id_alloc.lookup(ctxt->name.c_str());
+    if(pSid){
+        auto sid = *pSid;
+        g_afb_instance->app.id_alloc.remove_id(sid);
+        g_afb_instance->app.layers.remove_surface(sid);
+        g_afb_instance->app.controller->sprops.erase(sid);
+        g_afb_instance->app.controller->surfaces.erase(sid);
+        HMI_DEBUG("wm", "delete surfaceID %d", sid);
+    }
+    delete ctxt;
+}
+
 void windowmanager_requestsurface(afb_req req) noexcept {
    std::lock_guard<std::mutex> guard(binding_m);
    #ifdef ST
@@ -166,7 +197,30 @@ void windowmanager_requestsurface(afb_req req) noexcept {
        return;
    }
 
+   /* Create Security Context */
+   bool isFirstReq = checkFirstReq(req);
+   if(!isFirstReq){
+       wmClientCtxt* ctxt = (wmClientCtxt*)afb_req_context_get(req);
+       HMI_DEBUG("wm", "You're %s.", ctxt->name.c_str());
+       if(ctxt->name != std::string(a_drawing_name)){
+           afb_req_fail_f(req, "failed", "Dont request with other name: %s for now", a_drawing_name);
+           HMI_DEBUG("wm", "Don't request with other name: %s for now", a_drawing_name);
+           return;
+       }
+   }
+
    auto ret = g_afb_instance->app.api_request_surface(a_drawing_name);
+
+   if(isFirstReq){
+       wmClientCtxt* ctxt = new wmClientCtxt(a_drawing_name);
+       HMI_DEBUG("wm", "create session for %s", ctxt->name.c_str());
+       afb_req_session_set_LOA(req, 1);
+       afb_req_context_set(req, ctxt, cbRemoveClientCtxt);
+   }
+   else{
+       HMI_DEBUG("wm", "session already created for %s", a_drawing_name);
+   }
+
    if (ret.is_err()) {
       afb_req_fail(req, "failed", ret.unwrap_err());
       return;
-- 
2.16.6