OS.h and JKRDvdFile (#19)

* OS header

* JKRFile and JKRDvdFile

include/os/OS.h

@@ -0,0 +1,59 @@
+#ifndef __OS_H_
+#define __OS_H_
+
+struct OSThread {
+    u8 unkn[0x318];
+};
+
+struct OSMessageQueue {
+    u8 unkn[0x20];
+};
+
+struct OSMutex {
+    u8 unkn[24];
+};
+
+typedef void* OSMessage;
+extern "C" {
+    void OSInitMutex(OSMutex*);
+    void OSLockMutex(OSMutex*);
+    void OSUnlockMutex(OSMutex*);
+    void OSEnableScheduler(void);
+    void OSDisableScheduler(void);
+    void OSCheckActiveThreads(void);
+    void OSReport_Error(char*,...);
+    u32 OSGetSoundMode(void);
+    void OSSuspendThread(void);
+    void OSSetThreadPriority(void);
+    void OSResumeThread(void);
+    void OSGetThreadPriority(void);
+    void OSGetConsoleType(void);
+    void OSGetResetCode(void);
+    void OSAllocFromArenaLo(void);
+    void OSReportInit(void);
+    OSThread* OSGetCurrentThread(void);
+    void OSTicksToCalendarTime(void);
+
+    u32 OSGetArenaLo();
+    u32 OSGetArenaHi();
+    u32 OSInitAlloc(u32 low, u32 high, int param_3);
+    void OSSetArenaLo(u32 param_1);
+    void OSSetArenaHi(u32 param_1);
+
+    void OSGetTick(void);
+
+
+    void OSCreateThread(OSThread* thread, void* (*func)(void*), void* param,
+                    void* stack, u32 stackSize, int param_6, int param_7);
+    void OSCancelThread(OSThread* thread);
+    void OSDetachThread(OSThread* thread);
+    bool OSIsThreadSuspended(OSThread* thread);
+    bool OSIsThreadTerminated(OSThread* thread);
+    void OSInitMessageQueue(OSMessageQueue *queue, OSMessage* messages, int message_count);
+    void OSSetSwitchThreadCallback(void);
+    void OSReceiveMessage(OSMessageQueue *queue, OSMessage message, int flags);
+    void OSSendMessage(OSMessageQueue *queue, OSMessage message, int flags);
+}
+
+
+#endif