src/libultra/io/piacs.c


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#include "array_count.h"
#include "ultra64.h"

u32 __osPiAccessQueueEnabled = false;
static OSMesg piAccessBuf[1];
OSMesgQueue __osPiAccessQueue;

void __osPiCreateAccessQueue(void) {
    __osPiAccessQueueEnabled = true;
    osCreateMesgQueue(&__osPiAccessQueue, piAccessBuf, ARRAY_COUNT(piAccessBuf));
    osSendMesg(&__osPiAccessQueue, NULL, OS_MESG_NOBLOCK);
}

void __osPiGetAccess(void) {
    OSMesg msg;

    if (!__osPiAccessQueueEnabled) {
        __osPiCreateAccessQueue();
    }

    osRecvMesg(&__osPiAccessQueue, &msg, OS_MESG_BLOCK);
}

void __osPiRelAccess(void) {
    osSendMesg(&__osPiAccessQueue, NULL, OS_MESG_NOBLOCK);
}