added separate thread for sdl stuff, to be able to pass messages

1 files changed, 27 insertions, 0 deletions

diff --git a/threading.c b/threading.c
new file mode 100644
index 00000000..c5d5a6c8
--- /dev/null
+++ b/threading.c
@@ -0,0 +1,27 @@
+#include <SDL/SDL.h>
+#include <SDL/SDL_thread.h>
+#include "threading.h"
+
+void thread_start (void (*fn)(uintptr_t ctx), uintptr_t ctx) {
+    if (!SDL_CreateThread ((int (*)(void*))fn, (void*)ctx)) {
+        printf ("SDL_CreateThread failed!\n");
+    }
+}
+uintptr_t mutex_create (void) {
+    SDL_mutex *mtx = SDL_CreateMutex ();
+    if (!mtx) {
+        printf ("SDL_CreateMutex failed!\n");
+    }
+    return (uintptr_t)mtx;
+}
+void mutex_free (uintptr_t mtx) {
+    SDL_mutexP ((SDL_mutex*)mtx); // grant that no thread does processing now
+    SDL_DestroyMutex ((SDL_mutex*)mtx);
+}
+int mutex_lock (uintptr_t mtx) {
+    return SDL_mutexP ((SDL_mutex*)mtx);
+}
+int mutex_unlock (uintptr_t mtx) {
+    return SDL_mutexV ((SDL_mutex*)mtx);
+}
+