[retro-gtk] debug: Add retro_debug()

[Adrien Plazas <aplazas src gnome org>]

commit 152c44d3dc2793e369a0c8ea7fe24a6d24b8f341
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sat Dec 19 08:47:37 2020 +0100

    debug: Add retro_debug()
    
    This will simplify logging debug information.

 shared/retro-debug-private.h | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/shared/retro-debug-private.h b/shared/retro-debug-private.h
index e70da9f..70ae804 100644
--- a/shared/retro-debug-private.h
+++ b/shared/retro-debug-private.h
@@ -12,4 +12,10 @@ G_BEGIN_DECLS
 
 gboolean retro_is_debug (void);
 
+#define retro_debug(...) \
+  G_STMT_START { \
+    if (G_UNLIKELY (retro_is_debug ())) \
+      g_debug (__VA_ARGS__); \
+  } G_STMT_END
+
 G_END_DECLS