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