implement handler for sdl2 poll

core/sdl2/CMakeLists.txt

@@ -2,7 +2,7 @@ add_library(nf7core_sdl2)
 target_sources(nf7core_sdl2
   PRIVATE
     mod.c
-    poll.h
+    poll.priv.h
     win.c
   PUBLIC
     win.h

core/sdl2/mod.c

@@ -12,7 +12,7 @@
 #include "util/log.h"
 #include "util/malloc.h"
 
-#include "core/sdl2/poll.h"
+#include "core/sdl2/poll.priv.h"
 
 
 static atomic_uint_least32_t sdl_refcnt_ = 0;

core/sdl2/poll.priv.h

@@ -14,8 +14,10 @@ struct nf7_core_sdl2_poll {
   uv_loop_t*              uv;
 
   uv_timer_t timer;
-
   uint64_t   interval;
+
+  void* data;
+  void (*handler)(struct nf7_core_sdl2_poll*, const SDL_Event*);
 };
 
 
@@ -62,10 +64,10 @@ static void poll_del_(struct nf7_core_sdl2_poll* this) {
     return;
   }
   if (this == this->timer.data) {
+    this->handler = nullptr;
     uv_close((uv_handle_t*) &this->timer, poll_on_close_);
     return;
   }
-
   nf7_util_malloc_del(this->malloc, this);
 }
 
@@ -76,6 +78,9 @@ static void poll_on_time_(uv_timer_t* timer) {
 
   SDL_Event e;
   while (0 != SDL_PollEvent(&e)) {
+    if (nullptr != this->handler) {
+      this->handler(this, &e);
+    }
   }
 
   if (0 != uv_timer_start(&this->timer, poll_on_time_, this->interval, 0)) {