oot/include/ultra64/message.h

#ifndef ULTRA64_MESSAGE_H
#define ULTRA64_MESSAGE_H

#define OS_MESG_NOBLOCK         0
#define OS_MESG_BLOCK           1

#define OS_NUM_EVENTS           15

#define OS_EVENT_SW1            0     /* CPU SW1 interrupt */
#define OS_EVENT_SW2            1     /* CPU SW2 interrupt */
#define OS_EVENT_CART           2     /* Cartridge interrupt: used by rmon */
#define OS_EVENT_COUNTER        3     /* Counter int: used by VI/Timer Mgr */
#define OS_EVENT_SP             4     /* SP task done interrupt */
#define OS_EVENT_SI             5     /* SI (controller) interrupt */
#define OS_EVENT_AI             6     /* AI interrupt */
#define OS_EVENT_VI             7     /* VI interrupt: used by VI/Timer Mgr */
#define OS_EVENT_PI             8     /* PI interrupt: used by PI Manager */
#define OS_EVENT_DP             9     /* DP full sync interrupt */
#define OS_EVENT_CPU_BREAK      10    /* CPU breakpoint: used by rmon */
#define OS_EVENT_SP_BREAK       11    /* SP breakpoint:  used by rmon */
#define OS_EVENT_FAULT          12    /* CPU fault event: used by rmon */
#define OS_EVENT_THREADSTATUS   13    /* CPU thread status: used by rmon */
#define OS_EVENT_PRENMI         14    /* Pre NMI interrupt */

#ifdef _LANGUAGE_C

#include "thread.h"

typedef void* OSMesg;
typedef u32 OSEvent;

typedef struct OSMesgQueue {
    /* 0x00 */ OSThread* mtqueue;
    /* 0x04 */ OSThread* fullqueue;
    /* 0x08 */ s32 validCount;
    /* 0x0C */ s32 first;
    /* 0x10 */ s32 msgCount;
    /* 0x14 */ OSMesg* msg;
} OSMesgQueue; // size = 0x18

/* Get count of valid messages in queue */
#define MQ_GET_COUNT(mq)    ((mq)->validCount)

/* Determine if message queue is empty or full */
#define MQ_IS_EMPTY(mq)     (MQ_GET_COUNT(mq) == 0)
#define MQ_IS_FULL(mq)      (MQ_GET_COUNT(mq) >= (mq)->msgCount)

#else

// OSMesgQueue struct member offsets

#define MQ_MTQUEUE      0x00
#define MQ_FULLQUEUE    0x04
#define MQ_VALIDCOUNT   0x08
#define MQ_FIRST        0x0C
#define MQ_MSGCOUNT     0x10
#define MQ_MSG          0x14

#endif

#endif