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#include "OS_message.h"
#include "function_target.h"
#include "OS_system.h"
#include "OS_thread.h"
ARM_FUNC void OS_InitMessageQueue(OSMessageQueue *mq, OSMessage *msgArray, s32 msgCount)
{
OS_InitThreadQueue(&mq->queueSend);
OS_InitThreadQueue(&mq->queueReceive);
mq->msgArray = msgArray;
mq->msgCount = msgCount;
mq->firstIndex = 0;
mq->usedCount = 0;
}
ARM_FUNC BOOL OS_SendMessage(OSMessageQueue *mq, OSMessage msg, s32 flags)
{
OSIntrMode enabled = OS_DisableInterrupts();
while (mq->msgCount <= mq->usedCount)
{
if (!(flags & OS_MESSAGE_BLOCK))
{
(void)OS_RestoreInterrupts(enabled);
return FALSE;
}
else
{
OS_SleepThread(&mq->queueSend);
}
}
s32 lastIndex = (mq->firstIndex + mq->usedCount) % mq->msgCount;
mq->msgArray[lastIndex] = msg;
mq->usedCount++;
OS_WakeupThread(&mq->queueReceive);
(void)OS_RestoreInterrupts(enabled);
return TRUE;
}
ARM_FUNC BOOL OS_ReceiveMessage(OSMessageQueue *mq, OSMessage *msg, s32 flags)
{
OSIntrMode enabled = OS_DisableInterrupts();
while (mq->usedCount == 0)
{
if (!(flags & OS_MESSAGE_BLOCK))
{
(void)OS_RestoreInterrupts(enabled);
return FALSE;
}
else
{
OS_SleepThread(&mq->queueReceive);
}
}
if (msg != NULL)
{
*msg = mq->msgArray[mq->firstIndex];
}
mq->firstIndex = (mq->firstIndex + 1) % mq->msgCount;
mq->usedCount--;
OS_WakeupThread(&mq->queueSend);
(void)OS_RestoreInterrupts(enabled);
return TRUE;
}
ARM_FUNC BOOL OS_JamMessage(OSMessageQueue *mq, OSMessage msg, s32 flags)
{
OSIntrMode enabled = OS_DisableInterrupts();
while (mq->msgCount <= mq->usedCount)
{
if (!(flags & OS_MESSAGE_BLOCK))
{
(void)OS_RestoreInterrupts(enabled);
return FALSE;
}
else
{
OS_SleepThread(&mq->queueSend);
}
}
mq->firstIndex = (mq->firstIndex + mq->msgCount - 1) % mq->msgCount;
mq->msgArray[mq->firstIndex] = msg;
mq->usedCount++;
OS_WakeupThread(&mq->queueReceive);
(void)OS_RestoreInterrupts(enabled);
return TRUE;
}
ARM_FUNC BOOL OS_ReadMessage(OSMessageQueue *mq, OSMessage *msg, s32 flags)
{
OSIntrMode enabled = OS_DisableInterrupts();
while (mq->usedCount == 0)
{
if (!(flags & OS_MESSAGE_BLOCK))
{
(void)OS_RestoreInterrupts(enabled);
return FALSE;
}
else
{
OS_SleepThread(&mq->queueReceive);
}
}
if (msg != NULL)
{
*msg = mq->msgArray[mq->firstIndex];
}
(void)OS_RestoreInterrupts(enabled);
return TRUE;
}
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