lib/ultralib/src/io/piacs.c


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#include "macros.h"
#include "PR/os_internal.h"

#define PI_Q_BUF_LEN 1
u32 __osPiAccessQueueEnabled = 0;
static OSMesg piAccessBuf[PI_Q_BUF_LEN];
OSMesgQueue __osPiAccessQueue ALIGNED(8);

void __osPiCreateAccessQueue(void) {
    __osPiAccessQueueEnabled = 1;
    osCreateMesgQueue(&__osPiAccessQueue, piAccessBuf, PI_Q_BUF_LEN);
    osSendMesg(&__osPiAccessQueue, NULL, OS_MESG_NOBLOCK);
}

void __osPiGetAccess(void) {
    OSMesg dummyMesg;
    if (!__osPiAccessQueueEnabled) {
        __osPiCreateAccessQueue();
    }
    osRecvMesg(&__osPiAccessQueue, &dummyMesg, OS_MESG_BLOCK);
}

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