[config] loop in the notifier thread and reload configuration file if it is changed

src/notify.cpp

@@ -10,19 +10,24 @@ pthread_t fileChange;
 #define EVENT_BUF_LEN     ( 1024 * ( EVENT_SIZE + 16 ) )
 
 void *fileChanged(void *params_void){
-    overlay_params *params = reinterpret_cast<overlay_params *>(params_void);
+    notify_thread *nt = reinterpret_cast<notify_thread *>(params_void);
     int length, i = 0;
     int fd;
     int wd;
     char buffer[EVENT_BUF_LEN];
     fd = inotify_init();
-    wd = inotify_add_watch( fd, config_file_path.c_str(), IN_MODIFY);
-    length = read( fd, buffer, EVENT_BUF_LEN );
-    while (i < length) {
-        struct inotify_event *event =
-            (struct inotify_event *) &buffer[i];
-        i += EVENT_SIZE + event->len;
+    wd = inotify_add_watch( fd, nt->params->config_file_path.c_str(), IN_MODIFY);
+    while (!nt->quit) {
+        length = read( fd, buffer, EVENT_BUF_LEN );
+        while (i < length) {
+            struct inotify_event *event =
+                (struct inotify_event *) &buffer[i];
+            i += EVENT_SIZE + event->len;
+            if (event->mask & IN_MODIFY)
+                parse_overlay_config(nt->params, getenv("MANGOHUD_CONFIG"));
+        }
+        i = 0;
+        printf("File Changed\n");
     }
-    printf("File Changed\n");
     return NULL;
 }

src/notify.h

@@ -1,5 +1,11 @@
 #include <thread>
 #include "overlay_params.h"
 
+struct notify_thread
+{
+    overlay_params *params = nullptr;
+    bool quit = false;
+};
+
 extern pthread_t fileChange;
 extern void *fileChanged(void *params_void);

src/overlay.cpp

@@ -83,6 +83,8 @@ struct instance_data {
 
    /* Dumping of frame stats to a file has been enabled and started. */
    bool capture_started;
+
+   notify_thread notifier;
 };
 
 /* Mapped from VkDevice */
@@ -2612,7 +2614,8 @@ static VkResult overlay_CreateInstance(
    instance_data_map_physical_devices(instance_data, true);
 
    parse_overlay_config(&instance_data->params, getenv("MANGOHUD_CONFIG"));
-   pthread_create(&fileChange, NULL, &fileChanged, &instance_data->params);
+   instance_data->notifier.params = &instance_data->params;
+   pthread_create(&fileChange, NULL, &fileChanged, &instance_data->notifier);
 
    init_cpu_stats(instance_data->params);
 
@@ -2635,6 +2638,7 @@ static void overlay_DestroyInstance(
    struct instance_data *instance_data = FIND(struct instance_data, instance);
    instance_data_map_physical_devices(instance_data, false);
    instance_data->vtable.DestroyInstance(instance, pAllocator);
+   instance_data->notifier.quit = true;
    destroy_instance_data(instance_data);
 }