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#include <dolphin/os.h>
void OSInitMessageQueue(OSMessageQueue* mq, OSMessage* msgArray, s32 msgCount) {
OSInitThreadQueue(&mq->queueSend);
OSInitThreadQueue(&mq->queueReceive);
mq->msgArray = msgArray;
mq->msgCount = msgCount;
mq->firstIndex = 0;
mq->usedCount = 0;
}
BOOL OSSendMessage(OSMessageQueue* mq, OSMessage msg, s32 flags) {
BOOL enabled;
s32 lastIndex;
enabled = OSDisableInterrupts();
while (mq->msgCount <= mq->usedCount) {
if (!(flags & OS_MESSAGE_BLOCK)) {
OSRestoreInterrupts(enabled);
return FALSE;
} else {
OSSleepThread(&mq->queueSend);
}
}
lastIndex = (mq->firstIndex + mq->usedCount) % mq->msgCount;
mq->msgArray[lastIndex] = msg;
mq->usedCount++;
OSWakeupThread(&mq->queueReceive);
OSRestoreInterrupts(enabled);
return TRUE;
}
BOOL OSReceiveMessage(OSMessageQueue* mq, OSMessage* msg, s32 flags) {
BOOL enabled;
enabled = OSDisableInterrupts();
while (mq->usedCount == 0) {
if (!(flags & OS_MESSAGE_BLOCK)) {
OSRestoreInterrupts(enabled);
return FALSE;
} else {
OSSleepThread(&mq->queueReceive);
}
}
if (msg != NULL) {
*msg = mq->msgArray[mq->firstIndex];
}
mq->firstIndex = (mq->firstIndex + 1) % mq->msgCount;
mq->usedCount--;
OSWakeupThread(&mq->queueSend);
OSRestoreInterrupts(enabled);
return TRUE;
}
BOOL OSJamMessage(OSMessageQueue* mq, OSMessage msg, s32 flags) {
BOOL enabled;
enabled = OSDisableInterrupts();
while (mq->msgCount <= mq->usedCount)
{
if (!(flags & OS_MESSAGE_BLOCK)) {
OSRestoreInterrupts(enabled);
return FALSE;
} else {
OSSleepThread(&mq->queueSend);
}
}
mq->firstIndex = (mq->firstIndex + mq->msgCount - 1) % mq->msgCount;
mq->msgArray[mq->firstIndex] = msg;
mq->usedCount++;
OSWakeupThread(&mq->queueReceive);
OSRestoreInterrupts(enabled);
return TRUE;
}
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