3 files changed, 132 insertions, 0 deletions
diff --git a/include/nitro/OS_context_shared.h b/include/nitro/OS_context_shared.h
new file mode 100644
index 00000000..3ec722eb
--- /dev/null
+++ b/include/nitro/OS_context_shared.h
@@ -0,0 +1,25 @@
+#ifndef GUARD_OS_CONTEXT_SHARED_H
+#define GUARD_OS_CONTEXT_SHARED_H
+
+#include "nitro/types.h"
+
+typedef struct CPContext {
+    u64 div_numer;
+    u64 div_denom;
+    u64 sqrt;
+    u16 div_mode;
+    u16 sqrt_mode;
+} CPContext;
+
+typedef struct OSContext
+{
+    u32 cpsr;
+    u32 r[13];
+    u32 sp;
+    u32 lr;
+    u32 pc_plus4;
+    u32 sp_svc;
+    CPContext cp_context;
+} OSContext;
+
+#endif
diff --git a/include/nitro/OS_mutex_shared.h b/include/nitro/OS_mutex_shared.h
new file mode 100644
index 00000000..bd181f55
--- /dev/null
+++ b/include/nitro/OS_mutex_shared.h
@@ -0,0 +1,14 @@
+#ifndef GUARD_OS_SHARED_MUTEX_H
+#define GUARD_OS_SHARED_MUTEX_H
+
+#include "nitro/types.h"
+#include "nitro/OS_thread_shared.h"
+
+struct OSMutex {
+    OSThreadQueue queue;
+    OSThread *thread;
+    s32 count;
+    OSMutexLink link;
+};
+
+#endif
diff --git a/include/nitro/OS_thread_shared.h b/include/nitro/OS_thread_shared.h
new file mode 100644
index 00000000..5855ee21
--- /dev/null
+++ b/include/nitro/OS_thread_shared.h
@@ -0,0 +1,93 @@
+#ifndef GUARD_OS_THREAD_SHARED_H
+#define GUARD_OS_THREAD_SHARED_H
+
+#include "nitro/types.h"
+#include "nitro/OS_context_shared.h"
+
+typedef struct OSiAlarm OSAlarm;
+
+typedef struct _OSThread OSThread;
+
+typedef struct _OSThreadQueue OSThreadQueue;
+typedef struct _OSThreadLink OSThreadLink;
+typedef struct _OSMutexQueue OSMutexQueue;
+typedef struct _OSMutexLink OSMutexLink;
+typedef struct OSMutex OSMutex;
+
+struct _OSThreadQueue
+{
+    OSThread *head;
+    OSThread *tail;
+};
+
+struct _OSThreadLink
+{
+    OSThread *prev;
+    OSThread *next;
+};
+
+struct _OSMutexQueue
+{
+    OSMutex *head;
+    OSMutex *tail;
+};
+
+struct _OSMutexLink
+{
+    OSMutex *next;
+    OSMutex *prev;
+};
+
+typedef struct OSThreadInfo {
+    u16 isNeedRescheduling;
+    u16 irqDepth;
+    OSThread* current;
+    OSThread* list;
+    void* switchCallback; // type: OSSwitchThreadCallback
+} OSThreadInfo;
+
+typedef enum {
+    OS_THREAD_STATE_WAITING = 0,
+    OS_THREAD_STATE_READY = 1,
+    OS_THREAD_STATE_TERMINATED = 2
+} OSThreadState;
+
+typedef void (*OSSwitchThreadCallback) (OSThread *from, OSThread *to);
+
+typedef void (*OSThreadDestructor) (void *);
+
+struct _OSThread
+{
+    OSContext context;
+    OSThreadState state;
+    OSThread *next;
+    u32 id;
+    u32 priority;
+    void *profiler;
+
+    OSThreadQueue *queue;
+    OSThreadLink link;
+
+    OSMutex *mutex;
+    OSMutexQueue mutexQueue;
+
+    u32 stackTop;
+    u32 stackBottom;
+    u32 stackWarningOffset;
+
+    OSThreadQueue joinQueue;
+
+    void *specific[3];
+    OSAlarm *alarmForSleep;
+    OSThreadDestructor destructor;
+    void *userParameter;
+
+    u32 systemErrno;
+};
+
+static inline void OS_InitThreadQueue(OSThreadQueue * queue)
+{
+    queue->head = queue->tail = NULL;
+}
+
+#endif