system service: deliver initial AppContent entitlement updates through shared queue

src/libs/libSystemService.cpp

@@ -7,9 +7,12 @@
 #include "libs/dialog.h"
 #include "libs/errno.h"
 #include "libs/libs.h"
+#include "libs/systemService.h"
 #include "loader/symbolDatabase.h"
 
 #include <cstring>
+#include <deque>
+#include <mutex>
 
 namespace Libs {
 
@@ -70,6 +73,14 @@ struct SystemServiceEvent {
 	uint8_t data[8192];
 };
 
+static std::mutex          g_event_mutex;
+static std::deque<int32_t> g_events;
+
+void NotifyEntitlementUpdate() {
+	std::scoped_lock lock(g_event_mutex);
+	g_events.push_back(0x10000003); // SCE_SYSTEM_SERVICE_EVENT_ENTITLEMENT_UPDATE
+}
+
 struct SystemServiceDisplaySafeAreaInfo {
 	float   ratio;
 	uint8_t reserved[128];
@@ -153,7 +164,14 @@ static int KYTY_SYSV_ABI SystemServiceReceiveEvent(SystemServiceEvent* event) {
 	event->event_type = -1;
 	std::memset(event->data, 0, sizeof(event->data));
 
-	return SYSTEM_SERVICE_ERROR_NO_EVENT;
+	std::scoped_lock lock(g_event_mutex);
+	if (g_events.empty()) {
+		return SYSTEM_SERVICE_ERROR_NO_EVENT;
+	}
+	event->event_type = g_events.front();
+	g_events.pop_front();
+	LOGF("\t SystemService event = 0x%08x\n", static_cast<uint32_t>(event->event_type));
+	return OK;
 }
 
 static int KYTY_SYSV_ABI SystemServiceGetStatus(SystemServiceStatus* status) {
@@ -167,6 +185,10 @@ static int KYTY_SYSV_ABI SystemServiceGetStatus(SystemServiceStatus* status) {
 	*status                            = SystemServiceStatus();
 	status->is_system_ui_overlaid      = dialog.active;
 	status->is_in_background_execution = dialog.background;
+	{
+		std::scoped_lock lock(g_event_mutex);
+		status->event_num = static_cast<int32_t>(g_events.size());
+	}
 
 	return OK;
 }