From 37128bfd43a3d86d270c09e34f18fe4df48c6b35 Mon Sep 17 00:00:00 2001
From: Vaxry <43317083+vaxerski@users.noreply.github.com>
Date: Mon, 21 Aug 2023 19:36:09 +0200
Subject: internal: Wayland Protocol impl improvements (#2944)

---
 src/protocols/WaylandProtocol.cpp | 60 ++++++++++++++++++++++++++++++++-------
 1 file changed, 49 insertions(+), 11 deletions(-)

(limited to 'src/protocols/WaylandProtocol.cpp')

diff --git a/src/protocols/WaylandProtocol.cpp b/src/protocols/WaylandProtocol.cpp
index b5acffea..1ddf6f4b 100644
--- a/src/protocols/WaylandProtocol.cpp
+++ b/src/protocols/WaylandProtocol.cpp
@@ -1,7 +1,12 @@
 #include "WaylandProtocol.hpp"
 #include "../Compositor.hpp"
 
-CWaylandResource::CWaylandResource(wl_client* client, const wl_interface* wlInterface, uint32_t version, uint32_t id, bool destroyInDestructor) {
+static void resourceDestroyNotify(wl_listener* listener, void* data) {
+    CWaylandResource* pResource = wl_container_of(listener, pResource, m_liResourceDestroy);
+    pResource->markDefunct();
+}
+
+CWaylandResource::CWaylandResource(wl_client* client, const wl_interface* wlInterface, uint32_t version, uint32_t id) {
     m_pWLResource = wl_resource_create(client, wlInterface, version, id);
 
     if (!m_pWLResource) {
@@ -9,21 +14,42 @@ CWaylandResource::CWaylandResource(wl_client* client, const wl_interface* wlInte
         return;
     }
 
-    m_pWLClient            = client;
-    m_bDestroyInDestructor = destroyInDestructor;
+    wl_resource_set_user_data(m_pWLResource, this);
+
+    m_pWLClient = client;
 
-    Debug::log(LOG, "[wl res %lx] created", m_pWLResource);
+    wl_list_init(&m_liResourceDestroy.link);
+    m_liResourceDestroy.notify = resourceDestroyNotify;
+    wl_resource_add_destroy_listener(m_pWLResource, &m_liResourceDestroy);
+
+    Debug::log(TRACE, "[wl res %lx] created", m_pWLResource);
+}
+
+void CWaylandResource::markDefunct() {
+    if (m_bDefunct)
+        return;
+
+    Debug::log(TRACE, "[wl res %lx] now defunct", m_pWLResource);
+    m_bDefunct = true;
 }
 
 CWaylandResource::~CWaylandResource() {
-    if (m_pWLResource && m_bDestroyInDestructor)
-        wl_resource_destroy(m_pWLResource);
+    const bool DESTROY = m_pWLResource && !m_bDefunct;
 
-    Debug::log(LOG, "[wl res %lx] destroyed (wl_resource_destroy %s)", m_pWLResource, (m_pWLResource && m_bDestroyInDestructor ? "sent" : "not sent"));
+    wl_list_remove(&m_liResourceDestroy.link);
+    wl_list_init(&m_liResourceDestroy.link);
+
+    if (m_pWLResource)
+        wl_resource_set_user_data(m_pWLResource, nullptr);
+
+    Debug::log(TRACE, "[wl res %lx] destroying (wl_resource_destroy will be %s)", m_pWLResource, (DESTROY ? "sent" : "not sent"));
+
+    if (DESTROY)
+        wl_resource_destroy(m_pWLResource);
 }
 
 bool CWaylandResource::good() {
-    return resource();
+    return m_pWLResource && !m_bDefunct;
 }
 
 wl_resource* CWaylandResource::resource() {
@@ -31,19 +57,31 @@ wl_resource* CWaylandResource::resource() {
 }
 
 uint32_t CWaylandResource::version() {
+    RASSERT(good(), "Attempted to call version() on a bad resource");
+
     return wl_resource_get_version(m_pWLResource);
 }
 
-void CWaylandResource::setImplementation(const void* impl, void* data, wl_resource_destroy_func_t df) {
+void CWaylandResource::setImplementation(const void* impl, wl_resource_destroy_func_t df) {
+    RASSERT(good(), "Attempted to call setImplementation() on a bad resource");
     RASSERT(!m_bImplementationSet, "Wayland Resource %lx already has an implementation, cannot re-set!", m_pWLResource);
 
-    wl_resource_set_implementation(m_pWLResource, impl, data, df);
+    wl_resource_set_implementation(m_pWLResource, impl, this, df);
 
-    Debug::log(LOG, "[wl res %lx] set impl to %lx", m_pWLResource, impl);
+    Debug::log(TRACE, "[wl res %lx] set impl to %lx", m_pWLResource, impl);
 
     m_bImplementationSet = true;
 }
 
+void CWaylandResource::setData(void* data) {
+    Debug::log(TRACE, "[wl res %lx] set data to %lx", m_pWLResource, data);
+    m_pData = data;
+}
+
+void* CWaylandResource::data() {
+    return m_pData;
+}
+
 static void bindManagerInternal(wl_client* client, void* data, uint32_t ver, uint32_t id) {
     ((IWaylandProtocol*)data)->bindManager(client, data, ver, id);
 }
-- 
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