Embed the SDL2 libraries into vendor:sdl2

vendor/sdl2/sdl_mutex.odin

@@ -0,0 +1,44 @@
+package sdl2
+
+import "core:c"
+
+when ODIN_OS == "windows" do foreign import lib "SDL2.lib"
+when ODIN_OS == "linux"   do foreign import lib "system:SDL2"
+when ODIN_OS == "darwin"  do foreign import lib "system:SDL2"
+when ODIN_OS == "freebsd" do foreign import lib "system:SDL2"
+
+MUTEX_TIMEDOUT :: 1;
+MUTEX_MAXWAIT  :: ~u32(0);
+
+mutex :: struct {};
+
+semaphore :: struct {};
+sem :: semaphore;
+
+cond :: struct {};
+
+mutexP :: LockMutex;
+mutexV :: UnlockMutex;
+
+@(default_calling_convention="c", link_prefix="SDL_")
+foreign lib {
+	CreateMutex  :: proc() -> ^mutex ---
+	LockMutex    :: proc(m: ^mutex) -> c.int ---
+	TryLockMutex :: proc(m: ^mutex) -> c.int ---
+	UnlockMutex  :: proc(m: ^mutex) -> c.int ---
+	DestroyMutex :: proc(m: ^mutex) ---
+
+	CreateSemaphore  :: proc(initial_value: u32) -> ^sem ---
+	DestroySemaphore :: proc(s: ^sem) ---
+	SemWait          :: proc(s: ^sem) -> c.int ---
+	SemTryWait       :: proc(s: ^sem) -> c.int ---
+	SemWaitTimeout   :: proc(s: ^sem, ms: u32) -> c.int ---
+	SemValue         :: proc(s: ^sem) -> u32 ---
+
+	CreateCond      :: proc() -> ^cond ---
+	DestroyCond     :: proc(cv: ^cond) ---
+	CondSignal      :: proc(cv: ^cond) -> c.int ---
+	CondBroadcast   :: proc(cv: ^cond) -> c.int ---
+	CondWait        :: proc(cv: ^cond, m: ^mutex) -> c.int ---
+	CondWaitTimeout :: proc(cv: ^cond, m: ^mutex, ms: u32) -> c.int ---
+}