INT8U OSTaskCreate (void (*task)(void *pd), void *pdata, OS_STK *ptos, INT8U prio)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
OS_STK *psp;
INT8U err;
#if OS_ARG_CHK_EN > 0
if (prio > OS_LOWEST_PRIO) { /* Make sure priority is within allowable range */
return (OS_PRIO_INVALID);
}
#endif
psp = (OS_STK *)OSTaskStkInit(task, pdata, ptos, 0); /* Initialize the task's stack */
err = OS_TCBInit(prio, psp, (OS_STK *)0, 0, 0, (void *)0, 0);
if (err == OS_NO_ERR) {
OS_ENTER_CRITICAL();
OSTaskCtr++; /* Increment the #tasks counter */
OS_EXIT_CRITICAL();
if (OSRunning == TRUE) { /* Find highest priority task if multitasking has started */
OS_Sched();
}
}
return (err);
}
void OSTimeDly (INT32U ticks)
{
INT8U y;
#if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0u;
#endif
if (OSIntNesting > 0u) { /* See if trying to call from an ISR */
return;
}
if (OSLockNesting > 0u) { /* See if called with scheduler locked */
return;
}
if (ticks > 0u) { /* 0 means no delay! */
OS_ENTER_CRITICAL();
y = OSTCBCur->OSTCBY; /* Delay current task */
/* 清除任务就绪表中的就绪状态 */
OSRdyTbl[y] &= (OS_PRIO)~OSTCBCur->OSTCBBitX;
/* 清除任务就绪分组中的就绪状态 */
if (OSRdyTbl[y] == 0u) {
OSRdyGrp &= (OS_PRIO)~OSTCBCur->OSTCBBitY;
}
/* 设置任务TCB中的延时 */
OSTCBCur->OSTCBDly = ticks; /* Load ticks in TCB */
OS_EXIT_CRITICAL();
/* 当前任务进入等待状态，进行任务调度 */
OS_Sched(); /* Find next task to run! */
}
}
INT8U OSTaskResume (INT8U prio)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
OS_TCB *ptcb;
#if OS_ARG_CHK_EN > 0
if (prio >= OS_LOWEST_PRIO) { /* Make sure task priority is valid */
return (OS_PRIO_INVALID);
}
#endif
OS_ENTER_CRITICAL();
ptcb = OSTCBPrioTbl[prio];
if (ptcb == (OS_TCB *)0) { /* Task to suspend must exist */
OS_EXIT_CRITICAL();
return (OS_TASK_RESUME_PRIO);
}
if ((ptcb->OSTCBStat & OS_STAT_SUSPEND) != OS_STAT_RDY) { /* Task must be suspended */
if (((ptcb->OSTCBStat &= ~OS_STAT_SUSPEND) == OS_STAT_RDY) && /* Remove suspension */
(ptcb->OSTCBDly == 0)) { /* Must not be delayed */
OSRdyGrp |= ptcb->OSTCBBitY; /* Make task ready to run */
OSRdyTbl[ptcb->OSTCBY] |= ptcb->OSTCBBitX;
OS_EXIT_CRITICAL();
OS_Sched();
} else {
OS_EXIT_CRITICAL();
}
return (OS_NO_ERR);
}
OS_EXIT_CRITICAL();
return (OS_TASK_NOT_SUSPENDED);
}
INT8U OSMboxPost (OS_EVENT *pevent, void *pmsg)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0;
#endif
#if OS_ARG_CHK_EN > 0
if (pevent == (OS_EVENT *)0) { /* Validate 'pevent' */
return (OS_ERR_PEVENT_NULL);
}
if (pmsg == (void *)0) { /* Make sure we are not posting a NULL pointer */
return (OS_ERR_POST_NULL_PTR);
}
#endif
if (pevent->OSEventType != OS_EVENT_TYPE_MBOX) { /* Validate event block type */
return (OS_ERR_EVENT_TYPE);
}
OS_ENTER_CRITICAL();
if (pevent->OSEventGrp != 0) { /* See if any task pending on mailbox */
/* Ready HPT waiting on event */
(void)OS_EventTaskRdy(pevent, pmsg, OS_STAT_MBOX, OS_STAT_PEND_OK);
OS_EXIT_CRITICAL();
OS_Sched(); /* Find highest priority task ready to run */
return (OS_ERR_NONE);
}
if (pevent->OSEventPtr != (void *)0) { /* Make sure mailbox doesn't already have a msg */
OS_EXIT_CRITICAL();
return (OS_ERR_MBOX_FULL);
}
pevent->OSEventPtr = pmsg; /* Place message in mailbox */
OS_EXIT_CRITICAL();
return (OS_ERR_NONE);
}
INT8U OSTimeDlyResume (INT8U prio)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
OS_TCB *ptcb;
if (prio >= OS_LOWEST_PRIO) {
return (OS_PRIO_INVALID);
}
OS_ENTER_CRITICAL();
ptcb = (OS_TCB *)OSTCBPrioTbl[prio]; /* Make sure that task exist */
if (ptcb != (OS_TCB *)0) {
if (ptcb->OSTCBDly != 0) { /* See if task is delayed */
ptcb->OSTCBDly = 0; /* Clear the time delay */
if ((ptcb->OSTCBStat & OS_STAT_SUSPEND) == OS_STAT_RDY) { /* See if task is ready to run */
OSRdyGrp |= ptcb->OSTCBBitY; /* Make task ready to run */
OSRdyTbl[ptcb->OSTCBY] |= ptcb->OSTCBBitX;
OS_EXIT_CRITICAL();
OS_Sched(); /* See if this is new highest priority */
} else {
OS_EXIT_CRITICAL(); /* Task may be suspended */
}
return (OS_NO_ERR);
} else {
OS_EXIT_CRITICAL();
return (OS_TIME_NOT_DLY); /* Indicate that task was not delayed */
}
}
OS_EXIT_CRITICAL();
return (OS_TASK_NOT_EXIST); /* The task does not exist */
}
INT8U OSTaskCreateExt (void (*task)(void *p_arg),
void *p_arg,
OS_STK *ptos,
INT8U prio,
INT16U id,
OS_STK *pbos,
INT32U stk_size,
void *pext,
INT16U opt)
{
OS_STK *psp;
INT8U err;
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0;
#endif
#if OS_ARG_CHK_EN > 0
if (prio > OS_LOWEST_PRIO) /* Make sure priority is within allowable range */
{
return (OS_ERR_PRIO_INVALID);
}
#endif
OS_ENTER_CRITICAL();
if (OSIntNesting > 0) /* Make sure we don't create the task from within an ISR */
{
OS_EXIT_CRITICAL();
return (OS_ERR_TASK_CREATE_ISR);
}
if (OSTCBPrioTbl[prio] == (OS_TCB *)0) /* Make sure task doesn't already exist at this priority */
{
OSTCBPrioTbl[prio] = OS_TCB_RESERVED;/* Reserve the priority to prevent others from doing ... */
/* ... the same thing until task is created. */
OS_EXIT_CRITICAL();
#if OS_TASK_STAT_STK_CHK_EN > 0
OS_TaskStkClr(pbos, stk_size, opt); /* Clear the task stack (if needed) */
#endif
psp = OSTaskStkInit(task, p_arg, ptos, opt); /* Initialize the task's stack */
err = OS_TCBInit(prio, psp, pbos, id, stk_size, pext, opt);
if (err == OS_ERR_NONE)
{
if (OSRunning == OS_TRUE) /* Find HPT if multitasking has started */
{
OS_Sched();
}
}
else
{
OS_ENTER_CRITICAL();
OSTCBPrioTbl[prio] = (OS_TCB *)0; /* Make this priority avail. to others */
OS_EXIT_CRITICAL();
}
return (err);
}
OS_EXIT_CRITICAL();
return (OS_ERR_PRIO_EXIST);
}
INT8U OSSemPost (OS_EVENT *pevent)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0;
#endif
#if OS_ARG_CHK_EN > 0
if (pevent == (OS_EVENT *)0) { /* Validate 'pevent' */
return (OS_ERR_PEVENT_NULL);
}
#endif
if (pevent->OSEventType != OS_EVENT_TYPE_SEM) { /* Validate event block type */
return (OS_ERR_EVENT_TYPE);
}
OS_ENTER_CRITICAL();
if (pevent->OSEventGrp != 0) { /* See if any task waiting for semaphore */
/* Ready HPT waiting on event */
(void)OS_EventTaskRdy(pevent, (void *)0, OS_STAT_SEM, OS_STAT_PEND_OK);
OS_EXIT_CRITICAL();
OS_Sched(); /* Find HPT ready to run */
return (OS_ERR_NONE);
}
if (pevent->OSEventCnt < 65535u) { /* Make sure semaphore will not overflow */
pevent->OSEventCnt++; /* Increment semaphore count to register event */
OS_EXIT_CRITICAL();
return (OS_ERR_NONE);
}
OS_EXIT_CRITICAL(); /* Semaphore value has reached its maximum */
return (OS_ERR_SEM_OVF);
}
// CODE_SECTION(OSTaskResume,".UserProgramCode")
INT8U OSTaskResume( INT8U prio )
{
OS_TCB *ptcb;
#if OS_CRITICAL_METHOD == 3 /* Storage for CPU status register */
OS_CPU_SR cpu_sr = 0;
#endif
#if OS_ARG_CHK_EN > 0
if ( prio >= OS_LOWEST_PRIO ) /* Make sure task priority is valid */
{
return ( OS_ERR_PRIO_INVALID );
}
#endif
OS_ENTER_CRITICAL();
ptcb = OSTCBPrioTbl[prio];
if ( ptcb == ( OS_TCB * )0 ) /* Task to suspend must exist */
{
OS_EXIT_CRITICAL();
return ( OS_ERR_TASK_RESUME_PRIO );
}
if ( ptcb == OS_TCB_RESERVED ) /* See if assigned to Mutex */
{
OS_EXIT_CRITICAL();
return ( OS_ERR_TASK_NOT_EXIST );
}
if (( ptcb->OSTCBStat & OS_STAT_SUSPEND ) != OS_STAT_RDY ) /* Task must be suspended */
{
ptcb->OSTCBStat &= ~( INT8U )OS_STAT_SUSPEND; /* Remove suspension */
if ( ptcb->OSTCBStat == OS_STAT_RDY ) /* See if task is now ready */
{
if ( ptcb->OSTCBDly == 0 )
{
OSRdyGrp |= ptcb->OSTCBBitY; /* Yes, Make task ready to run */
OSRdyTbl[ptcb->OSTCBY] |= ptcb->OSTCBBitX;
OS_EXIT_CRITICAL();
if ( OSRunning == OS_TRUE )
{
OS_Sched(); /* Find new highest priority task */
}
}
else
{
OS_EXIT_CRITICAL();
}
}
else /* Must be pending on event */
{
OS_EXIT_CRITICAL();
}
return ( OS_ERR_NONE );
}
OS_EXIT_CRITICAL();
return ( OS_ERR_TASK_NOT_SUSPENDED );
}
INT8U OSTaskCreateExt (void (*task)(void *pd),
void *pdata,
OS_STK *ptos,
INT8U prio,
INT16U id,
OS_STK *pbos,
INT32U stk_size,
void *pext,
INT16U opt)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
OS_STK *psp;
INT8U err;
#if OS_ARG_CHK_EN > 0
if (prio > OS_LOWEST_PRIO) { /* Make sure priority is within allowable range */
return (OS_PRIO_INVALID);
}
#endif
OS_ENTER_CRITICAL();
if (OSTCBPrioTbl[prio] == (OS_TCB *)0) { /* Make sure task doesn't already exist at this priority */
OSTCBPrioTbl[prio] = (OS_TCB *)1; /* Reserve the priority to prevent others from doing ... */
/* ... the same thing until task is created. */
OS_EXIT_CRITICAL();
if (((opt & OS_TASK_OPT_STK_CHK) != 0x0000) || /* See if stack checking has been enabled */
((opt & OS_TASK_OPT_STK_CLR) != 0x0000)) { /* See if stack needs to be cleared */
#if OS_STK_GROWTH == 1
(void)memset(pbos, 0, stk_size * sizeof(OS_STK));
#else
(void)memset(ptos, 0, stk_size * sizeof(OS_STK));
#endif
}
psp = (OS_STK *)OSTaskStkInit(task, pdata, ptos, opt); /* Initialize the task's stack */
err = OS_TCBInit(prio, psp, pbos, id, stk_size, pext, opt);
if (err == OS_NO_ERR) {
OS_ENTER_CRITICAL();
OSTaskCtr++; /* Increment the #tasks counter */
OS_EXIT_CRITICAL();
if (OSRunning == TRUE) { /* Find HPT if multitasking has started */
OS_Sched();
}
} else {
OS_ENTER_CRITICAL();
OSTCBPrioTbl[prio] = (OS_TCB *)0; /* Make this priority avail. to others */
OS_EXIT_CRITICAL();
}
return (err);
}
OS_EXIT_CRITICAL();
return (OS_PRIO_EXIST);
}
void *OSQPend (OS_EVENT *pevent, INT16U timeout, INT8U *err)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
void *msg;
OS_Q *pq;
if (OSIntNesting > 0) { /* See if called from ISR ... */
*err = OS_ERR_PEND_ISR; /* ... can't PEND from an ISR */
return ((void *)0);
}
#if OS_ARG_CHK_EN > 0
if (pevent == (OS_EVENT *)0) { /* Validate 'pevent' */
*err = OS_ERR_PEVENT_NULL;
return ((void *)0);
}
if (pevent->OSEventType != OS_EVENT_TYPE_Q) {/* Validate event block type */
*err = OS_ERR_EVENT_TYPE;
return ((void *)0);
}
#endif
OS_ENTER_CRITICAL();
pq = (OS_Q *)pevent->OSEventPtr; /* Point at queue control block */
if (pq->OSQEntries > 0) { /* See if any messages in the queue */
msg = *pq->OSQOut++; /* Yes, extract oldest message from the queue */
pq->OSQEntries--; /* Update the number of entries in the queue */
if (pq->OSQOut == pq->OSQEnd) { /* Wrap OUT pointer if we are at the end of the queue */
pq->OSQOut = pq->OSQStart;
}
OS_EXIT_CRITICAL();
*err = OS_NO_ERR;
return (msg); /* Return message received */
}
OSTCBCur->OSTCBStat |= OS_STAT_Q; /* Task will have to pend for a message to be posted */
OSTCBCur->OSTCBDly = timeout; /* Load timeout into TCB */
OS_EventTaskWait(pevent); /* Suspend task until event or timeout occurs */
OS_EXIT_CRITICAL();
OS_Sched(); /* Find next highest priority task ready to run */
OS_ENTER_CRITICAL();
if (OSTCBCur->OSTCBStat & OS_STAT_Q) { /* Was task readied because of a timeout? */
OS_EventTO(pevent); /* Yes */
OS_EXIT_CRITICAL();
*err = OS_TIMEOUT; /* Indicate a timeout occured */
return ((void *)0); /* No message received */
}
msg = OSTCBCur->OSTCBMsg;/* No, Extract message from TCB (Put there by QPost) */
OSTCBCur->OSTCBMsg = (void *)0;
OSTCBCur->OSTCBStat = OS_STAT_RDY;
OSTCBCur->OSTCBEventPtr = (OS_EVENT *)0; /* No longer waiting for event */
OS_EXIT_CRITICAL();
*err = OS_NO_ERR;
return (msg); /* Return message received */
}
INT8U OSQPostOpt (OS_EVENT *pevent,
void *pmsg,
INT8U opt)
{
OS_Q *pq;
#if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0u;
#endif
#if OS_ARG_CHK_EN > 0u
if (pevent == (OS_EVENT *)0) { /* Validate 'pevent' */
return (OS_ERR_PEVENT_NULL);
}
#endif
if (pevent->OSEventType != OS_EVENT_TYPE_Q) { /* Validate event block type */
return (OS_ERR_EVENT_TYPE);
}
OS_ENTER_CRITICAL();
if (pevent->OSEventGrp != 0x00u) { /* See if any task pending on queue */
if ((opt & OS_POST_OPT_BROADCAST) != 0x00u) { /* Do we need to post msg to ALL waiting tasks ? */
while (pevent->OSEventGrp != 0u) { /* Yes, Post to ALL tasks waiting on queue */
(void)OS_EventTaskRdy(pevent, pmsg, OS_STAT_Q, OS_STAT_PEND_OK);
}
} else { /* No, Post to HPT waiting on queue */
(void)OS_EventTaskRdy(pevent, pmsg, OS_STAT_Q, OS_STAT_PEND_OK);
}
OS_EXIT_CRITICAL();
if ((opt & OS_POST_OPT_NO_SCHED) == 0u) { /* See if scheduler needs to be invoked */
OS_Sched(); /* Find highest priority task ready to run */
}
return (OS_ERR_NONE);
}
pq = (OS_Q *)pevent->OSEventPtr; /* Point to queue control block */
if (pq->OSQEntries >= pq->OSQSize) { /* Make sure queue is not full */
OS_EXIT_CRITICAL();
return (OS_ERR_Q_FULL);
}
if ((opt & OS_POST_OPT_FRONT) != 0x00u) { /* Do we post to the FRONT of the queue? */
if (pq->OSQOut == pq->OSQStart) { /* Yes, Post as LIFO, Wrap OUT pointer if we ... */
pq->OSQOut = pq->OSQEnd; /* ... are at the 1st queue entry */
}
pq->OSQOut--;
*pq->OSQOut = pmsg; /* Insert message into queue */
} else { /* No, Post as FIFO */
*pq->OSQIn++ = pmsg; /* Insert message into queue */
if (pq->OSQIn == pq->OSQEnd) { /* Wrap IN ptr if we are at end of queue */
pq->OSQIn = pq->OSQStart;
}
}
pq->OSQEntries++; /* Update the nbr of entries in the queue */
OS_EXIT_CRITICAL();
return (OS_ERR_NONE);
}
void *OSMboxPend (OS_EVENT *pevent, INT16U timeout, INT8U *err)
{
void *msg;
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0;
#endif
#if OS_ARG_CHK_EN > 0
if (err == (INT8U *)0) { /* Validate 'err' */
return ((void *)0);
}
if (pevent == (OS_EVENT *)0) { /* Validate 'pevent' */
*err = OS_ERR_PEVENT_NULL;
return ((void *)0);
}
#endif
if (pevent->OSEventType != OS_EVENT_TYPE_MBOX) { /* Validate event block type */
*err = OS_ERR_EVENT_TYPE;
return ((void *)0);
}
if (OSIntNesting > 0) { /* See if called from ISR ... */
*err = OS_ERR_PEND_ISR; /* ... can't PEND from an ISR */
return ((void *)0);
}
OS_ENTER_CRITICAL();
msg = pevent->OSEventPtr;
if (msg != (void *)0) { /* See if there is already a message */
pevent->OSEventPtr = (void *)0; /* Clear the mailbox */
OS_EXIT_CRITICAL();
*err = OS_NO_ERR;
return (msg); /* Return the message received (or NULL) */
}
OSTCBCur->OSTCBStat |= OS_STAT_MBOX; /* Message not available, task will pend */
OSTCBCur->OSTCBPendTO = FALSE;
OSTCBCur->OSTCBDly = timeout; /* Load timeout in TCB */
OS_EventTaskWait(pevent); /* Suspend task until event or timeout occurs */
OS_EXIT_CRITICAL();
OS_Sched(); /* Find next highest priority task ready to run */
OS_ENTER_CRITICAL();
if (OSTCBCur->OSTCBPendTO == TRUE) { /* See if we were given the message */
OS_EventTO(pevent); /* Timed out, Make task ready */
OS_EXIT_CRITICAL();
*err = OS_TIMEOUT; /* Indicate that a timeout occured */
return ((void *)0); /* Return a NULL message */
}
msg = OSTCBCur->OSTCBMsg;
OSTCBCur->OSTCBMsg = (void *)0; /* Yes, clear message received */
OSTCBCur->OSTCBStat = OS_STAT_RDY;
OSTCBCur->OSTCBEventPtr = (OS_EVENT *)0; /* No longer waiting for event */
OS_EXIT_CRITICAL();
*err = OS_NO_ERR;
return (msg); /* Return the message received */
}
INT8U OSSemPendAbort (OS_EVENT *pevent,
INT8U opt,
INT8U *perr)
{
INT8U nbr_tasks;
#if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0u;
#endif
#ifdef OS_SAFETY_CRITICAL
if (perr == (INT8U *)0) {
OS_SAFETY_CRITICAL_EXCEPTION();
return (0u);
}
#endif
#if OS_ARG_CHK_EN > 0u
if (pevent == (OS_EVENT *)0) { /* Validate 'pevent' */
*perr = OS_ERR_PEVENT_NULL;
return (0u);
}
#endif
if (pevent->OSEventType != OS_EVENT_TYPE_SEM) { /* Validate event block type */
*perr = OS_ERR_EVENT_TYPE;
return (0u);
}
OS_ENTER_CRITICAL();
if (pevent->OSEventGrp != 0u) { /* See if any task waiting on semaphore? */
nbr_tasks = 0u;
switch (opt) {
case OS_PEND_OPT_BROADCAST: /* Do we need to abort ALL waiting tasks? */
while (pevent->OSEventGrp != 0u) { /* Yes, ready ALL tasks waiting on semaphore */
(void)OS_EventTaskRdy(pevent, (void *)0, OS_STAT_SEM, OS_STAT_PEND_ABORT);
nbr_tasks++;
}
break;
case OS_PEND_OPT_NONE:
default: /* No, ready HPT waiting on semaphore */
(void)OS_EventTaskRdy(pevent, (void *)0, OS_STAT_SEM, OS_STAT_PEND_ABORT);
nbr_tasks++;
break;
}
OS_EXIT_CRITICAL();
OS_Sched(); /* Find HPT ready to run */
*perr = OS_ERR_PEND_ABORT;
return (nbr_tasks);
}
OS_EXIT_CRITICAL();
*perr = OS_ERR_NONE;
return (0u); /* No tasks waiting on semaphore */
}
// CODE_SECTION(OSTimeDlyResume,".UserProgramCode")
INT8U OSTimeDlyResume( INT8U prio )
{
OS_TCB *ptcb;
#if OS_CRITICAL_METHOD == 3 /* Storage for CPU status register */
OS_CPU_SR cpu_sr = 0;
#endif
if ( prio >= OS_LOWEST_PRIO )
{
return ( OS_ERR_PRIO_INVALID );
}
OS_ENTER_CRITICAL();
ptcb = OSTCBPrioTbl[prio]; /* Make sure that task exist */
if ( ptcb == ( OS_TCB * )0 )
{
OS_EXIT_CRITICAL();
return ( OS_ERR_TASK_NOT_EXIST ); /* The task does not exist */
}
if ( ptcb == OS_TCB_RESERVED )
{
OS_EXIT_CRITICAL();
return ( OS_ERR_TASK_NOT_EXIST ); /* The task does not exist */
}
if ( ptcb->OSTCBDly == 0 ) /* See if task is delayed */
{
OS_EXIT_CRITICAL();
return ( OS_ERR_TIME_NOT_DLY ); /* Indicate that task was not delayed */
}
ptcb->OSTCBDly = 0; /* Clear the time delay */
if (( ptcb->OSTCBStat & OS_STAT_PEND_ANY ) != OS_STAT_RDY )
{
ptcb->OSTCBStat &= ~OS_STAT_PEND_ANY; /* Yes, Clear status flag */
ptcb->OSTCBStatPend = OS_STAT_PEND_TO; /* Indicate PEND timeout */
}
else
{
ptcb->OSTCBStatPend = OS_STAT_PEND_OK;
}
if (( ptcb->OSTCBStat & OS_STAT_SUSPEND ) == OS_STAT_RDY ) /* Is task suspended? */
{
OSRdyGrp |= ptcb->OSTCBBitY; /* No, Make ready */
OSRdyTbl[ptcb->OSTCBY] |= ptcb->OSTCBBitX;
OS_EXIT_CRITICAL();
OS_Sched(); /* See if this is new highest priority */
}
else
{
OS_EXIT_CRITICAL(); /* Task may be suspended */
}
return ( OS_ERR_NONE );
}
void OSSemPend (OS_EVENT *pevent, INT16U timeout, INT8U *err)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0;
#endif
#if OS_ARG_CHK_EN > 0
if (err == (INT8U *)0) { /* Validate 'err' */
return;
}
if (pevent == (OS_EVENT *)0) { /* Validate 'pevent' */
*err = OS_ERR_PEVENT_NULL;
return;
}
#endif
if (pevent->OSEventType != OS_EVENT_TYPE_SEM) { /* Validate event block type */
*err = OS_ERR_EVENT_TYPE;
return;
}
if (OSIntNesting > 0) { /* See if called from ISR ... */
*err = OS_ERR_PEND_ISR; /* ... can't PEND from an ISR */
return;
}
if (OSLockNesting > 0) { /* See if called with scheduler locked ... */
*err = OS_ERR_PEND_LOCKED; /* ... can't PEND when locked */
return;
}
OS_ENTER_CRITICAL();
if (pevent->OSEventCnt > 0) { /* If sem. is positive, resource available ... */
pevent->OSEventCnt--; /* ... decrement semaphore only if positive. */
OS_EXIT_CRITICAL();
*err = OS_NO_ERR;
return;
}
/* Otherwise, must wait until event occurs */
OSTCBCur->OSTCBStat |= OS_STAT_SEM; /* Resource not available, pend on semaphore */
OSTCBCur->OSTCBPendTO = OS_FALSE;
OSTCBCur->OSTCBDly = timeout; /* Store pend timeout in TCB */
OS_EventTaskWait(pevent); /* Suspend task until event or timeout occurs */
OS_EXIT_CRITICAL();
OS_Sched(); /* Find next highest priority task ready */
OS_ENTER_CRITICAL();
if (OSTCBCur->OSTCBPendTO == OS_TRUE) { /* See if we timedout */
OS_EventTO(pevent);
OS_EXIT_CRITICAL();
*err = OS_TIMEOUT; /* Indicate that didn't get event within TO */
return;
}
OSTCBCur->OSTCBEventPtr = (OS_EVENT *)0;
OS_EXIT_CRITICAL();
*err = OS_NO_ERR;
}
void OSTimeDly (UINT16 ticks)
{
if (ticks > 0) { /* 0 means no delay! */
OS_ENTER_CRITICAL();
if ((OSRdyTbl[OSTCBCur->OSTCBY] &= ~OSTCBCur->OSTCBBitX) == 0) { /* Delay current task */
OSRdyGrp &= ~OSTCBCur->OSTCBBitY;
}
OSTCBCur->OSTCBDly = ticks; /* Load ticks in TCB */
OS_EXIT_CRITICAL();
OS_Sched(); /* Find next task to run! */
}
}
INT8U OSTaskSuspend (INT8U prio)
{
BOOLEAN self;
OS_TCB *ptcb;
INT8U y;
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0;
#endif
#if OS_ARG_CHK_EN > 0
if (prio == OS_TASK_IDLE_PRIO) { /* Not allowed to suspend idle task */
return (OS_ERR_TASK_SUSPEND_IDLE);
}
if (prio >= OS_LOWEST_PRIO) { /* Task priority valid ? */
if (prio != OS_PRIO_SELF) {
return (OS_ERR_PRIO_INVALID);
}
}
#endif
OS_ENTER_CRITICAL();
if (prio == OS_PRIO_SELF) { /* See if suspend SELF */
prio = OSTCBCur->OSTCBPrio;
self = OS_TRUE;
} else if (prio == OSTCBCur->OSTCBPrio) { /* See if suspending self */
self = OS_TRUE;
} else {
self = OS_FALSE; /* No suspending another task */
}
ptcb = OSTCBPrioTbl[prio];
if (ptcb == (OS_TCB *)0) { /* Task to suspend must exist */
OS_EXIT_CRITICAL();
return (OS_ERR_TASK_SUSPEND_PRIO);
}
if (ptcb == OS_TCB_RESERVED) { /* See if assigned to Mutex */
OS_EXIT_CRITICAL();
return (OS_ERR_TASK_NOT_EXIST);
}
y = ptcb->OSTCBY;
OSRdyTbl[y] &= ~ptcb->OSTCBBitX; /* Make task not ready */
if (OSRdyTbl[y] == 0) {
OSRdyGrp &= ~ptcb->OSTCBBitY;
}
ptcb->OSTCBStat |= OS_STAT_SUSPEND; /* Status of task is 'SUSPENDED' */
OS_EXIT_CRITICAL();
if (self == OS_TRUE) { /* Context switch only if SELF */
OS_Sched(); /* Find new highest priority task */
}
return (OS_ERR_NONE);
}
INT8U OSMboxPendAbort (OS_EVENT *pevent, INT8U opt, INT8U *err)
{
INT8U nbr_tasks;
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0;
#endif
#if OS_ARG_CHK_EN > 0
if (err == (INT8U *)0) { /* Validate 'err' */
return (0);
}
if (pevent == (OS_EVENT *)0) { /* Validate 'pevent' */
*err = OS_ERR_PEVENT_NULL;
return (0);
}
#endif
if (pevent->OSEventType != OS_EVENT_TYPE_MBOX) { /* Validate event block type */
*err = OS_ERR_EVENT_TYPE;
return (0);
}
OS_ENTER_CRITICAL();
if (pevent->OSEventGrp != 0) { /* See if any task waiting on mailbox? */
nbr_tasks = 0;
switch (opt) {
case OS_PEND_OPT_BROADCAST: /* Do we need to abort ALL waiting tasks? */
while (pevent->OSEventGrp != 0) { /* Yes, ready ALL tasks waiting on mailbox */
(void)OS_EventTaskRdy(pevent, (void *)0, OS_STAT_MBOX, OS_STAT_PEND_ABORT);
nbr_tasks++;
}
break;
case OS_PEND_OPT_NONE: /* No, ready HPT waiting on mailbox */
default:
(void)OS_EventTaskRdy(pevent, (void *)0, OS_STAT_MBOX, OS_STAT_PEND_ABORT);
nbr_tasks++;
break;
}
OS_EXIT_CRITICAL();
OS_Sched(); /* Find HPT ready to run */
*err = OS_ERR_PEND_ABORT;
return (nbr_tasks);
}
OS_EXIT_CRITICAL();
*err = OS_ERR_NONE;
return (0); /* No tasks waiting on mailbox */
}
INT8U OSMboxPost (OS_EVENT *pevent, void *msg)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0;
#endif
#if OS_ARG_CHK_EN > 0
if (pevent == (OS_EVENT *)0) /* Validate 'pevent' */
{
return (OS_ERR_PEVENT_NULL);
}
if (msg == (void *)0) /* Make sure we are not posting a NULL pointer */
{
return (OS_ERR_POST_NULL_PTR);
}
#endif
// 事件类型是邮箱?
if (pevent->OSEventType != OS_EVENT_TYPE_MBOX) /* Validate event block type */
{
return (OS_ERR_EVENT_TYPE);
}
OS_ENTER_CRITICAL();
// 有任务正在等待该邮箱?
if (pevent->OSEventGrp != 0) /* See if any task pending on mailbox */
{
// 使最高优先级任务进入就绪态。
(void)OS_EventTaskRdy(pevent, msg, OS_STAT_MBOX); /* Ready HPT waiting on event */
OS_EXIT_CRITICAL();
// 找出优先级最高的任务并进行任务切换
OS_Sched(); /* Find highest priority task ready to run */
return (OS_NO_ERR);
}
// 没有任务在等待信号量:
// 邮箱不是空的?
if (pevent->OSEventPtr != (void *)0) /* Make sure mailbox doesn't already have a msg */
{
OS_EXIT_CRITICAL();
return (OS_MBOX_FULL);
}
// 将消息放进邮箱
pevent->OSEventPtr = msg; /* Place message in mailbox */
OS_EXIT_CRITICAL();
return (OS_NO_ERR);
}
INT8U OSMboxPostOpt (OS_EVENT *pevent, void *msg, INT8U opt)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0;
#endif
#if OS_ARG_CHK_EN > 0
if (pevent == (OS_EVENT *)0) { /* Validate 'pevent' */
return (OS_ERR_PEVENT_NULL);
}
if (msg == (void *)0) { /* Make sure we are not posting a NULL pointer */
return (OS_ERR_POST_NULL_PTR);
}
#endif
if (pevent->OSEventType != OS_EVENT_TYPE_MBOX) { /* Validate event block type */
return (OS_ERR_EVENT_TYPE);
}
OS_ENTER_CRITICAL();
if (pevent->OSEventGrp != 0) { /* See if any task pending on mailbox */
if ((opt & OS_POST_OPT_BROADCAST) != 0x00) { /* Do we need to post msg to ALL waiting tasks ? */
while (pevent->OSEventGrp != 0) { /* Yes, Post to ALL tasks waiting on mailbox */
// 从等待列表中找出使最高优先级任务（Highest Priority Task – HPT），并将其置于就绪态。
(void)OS_EventTaskRdy(pevent, msg, OS_STAT_MBOX);
}
}
else
{
// 从等待列表中找出使最高优先级任务（Highest Priority Task – HPT），并将其置于就绪态。
(void)OS_EventTaskRdy(pevent, msg, OS_STAT_MBOX); /* No, Post to HPT waiting on mbox */
}
OS_EXIT_CRITICAL();
if ((opt & OS_POST_OPT_NO_SCHED) == 0) {
OS_Sched(); /* Find HPT ready to run */
}
return (OS_NO_ERR);
}
if (pevent->OSEventPtr != (void *)0) { /* Make sure mailbox doesn't already have a msg */
OS_EXIT_CRITICAL();
return (OS_MBOX_FULL);
}
pevent->OSEventPtr = msg; /* Place message in mailbox */
OS_EXIT_CRITICAL();
return (OS_NO_ERR);
}
void OSTimeDly (INT16U ticks)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
if (ticks > 0) { /* 0 means no delay! */
OS_ENTER_CRITICAL();
if ((OSRdyTbl[OSTCBCur->OSTCBY] &= ~OSTCBCur->OSTCBBitX) == 0) { /* Delay current task */
OSRdyGrp &= ~OSTCBCur->OSTCBBitY;
}
OSTCBCur->OSTCBDly = ticks; /* Load ticks in TCB */
OS_EXIT_CRITICAL();
OS_Sched(); /* Find next task to run! */
}
}
INT8U OSQPostFront (OS_EVENT *pevent,
void *pmsg)
{
OS_Q *pq;
#if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0u;
#endif
#if OS_ARG_CHK_EN > 0u
if (pevent == (OS_EVENT *)0) /* Validate 'pevent' */
{
return (OS_ERR_PEVENT_NULL);
}
#endif
if (pevent->OSEventType != OS_EVENT_TYPE_Q) /* Validate event block type */
{
return (OS_ERR_EVENT_TYPE);
}
OS_ENTER_CRITICAL();
if (pevent->OSEventGrp != 0u) /* See if any task pending on queue */
{
/* Ready highest priority task waiting on event */
(void)OS_EventTaskRdy(pevent, pmsg, OS_STAT_Q, OS_STAT_PEND_OK);
OS_EXIT_CRITICAL();
OS_Sched(); /* Find highest priority task ready to run */
return (OS_ERR_NONE);
}
pq = (OS_Q *)pevent->OSEventPtr; /* Point to queue control block */
if (pq->OSQEntries >= pq->OSQSize) /* Make sure queue is not full */
{
OS_EXIT_CRITICAL();
return (OS_ERR_Q_FULL);
}
if (pq->OSQOut == pq->OSQStart) /* Wrap OUT ptr if we are at the 1st queue entry */
{
pq->OSQOut = pq->OSQEnd;
}
pq->OSQOut--;
*pq->OSQOut = pmsg; /* Insert message into queue */
pq->OSQEntries++; /* Update the nbr of entries in the queue */
OS_EXIT_CRITICAL();
return (OS_ERR_NONE);
}
INT8U OSMboxPostOpt (OS_EVENT *pevent,
void *pmsg,
INT8U opt)
{
#if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0u;
#endif
#if OS_ARG_CHK_EN > 0u
if (pevent == (OS_EVENT *)0) { /*事件控制块指针是否有效 */
return (OS_ERR_PEVENT_NULL);
}
if (pmsg == (void *)0) { /* Make sure we are not posting a NULL pointer */
return (OS_ERR_POST_NULL_PTR);
}
#endif
if (pevent->OSEventType != OS_EVENT_TYPE_MBOX) { /* 事件控制块类型是否有效 */
return (OS_ERR_EVENT_TYPE);
}
OS_ENTER_CRITICAL();
if (pevent->OSEventGrp != 0u) { /* See if any task pending on mailbox */
if ((opt & OS_POST_OPT_BROADCAST) != 0x00u) { /* Do we need to post msg to ALL waiting tasks ? */
while (pevent->OSEventGrp != 0u) { /* Yes, Post to ALL tasks waiting on mailbox */
(void)OS_EventTaskRdy(pevent, pmsg, OS_STAT_MBOX, OS_STAT_PEND_OK);
}
} else { /* No, Post to HPT waiting on mbox */
(void)OS_EventTaskRdy(pevent, pmsg, OS_STAT_MBOX, OS_STAT_PEND_OK);
}
OS_EXIT_CRITICAL();
if ((opt & OS_POST_OPT_NO_SCHED) == 0u) { /* See if scheduler needs to be invoked */
OS_Sched(); /* Find HPT ready to run */
}
return (OS_ERR_NONE);
}
if (pevent->OSEventPtr != (void *)0) { /* Make sure mailbox doesn't already have a msg */
OS_EXIT_CRITICAL();
return (OS_ERR_MBOX_FULL);
}
pevent->OSEventPtr = pmsg; /* Place message in mailbox */
OS_EXIT_CRITICAL();
return (OS_ERR_NONE);
}
void OSTimeDly (INT32U ticks)
{
OS_CPU_SR cpu_sr = 0u;
if (OSIntNesting > 0u) { /* See if trying to call from an ISR */
return;
}
if (OSLockNesting > 0u) { /* See if called with scheduler locked */
return;
}
if (ticks > 0u) { /* 0 means no delay! */
OS_ENTER_CRITICAL();
OSTaskRdy&= ~(1<<OSTCBCur->OSTCBPrio);
OSTCBCur->OSTCBDly = ticks; /* Load ticks in TCB */
OS_EXIT_CRITICAL();
OS_Sched(); /* Find next task to run! */
}
}
// 释放信号量
INT8U OSSemPost (OS_EVENT *pevent)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0;
#endif
#if OS_ARG_CHK_EN > 0
if (pevent == (OS_EVENT *)0) /* Validate 'pevent' */
{
return (OS_ERR_PEVENT_NULL);
}
#endif
// 检查事件类型是信号量
if (pevent->OSEventType != OS_EVENT_TYPE_SEM) /* Validate event block type */
{
return (OS_ERR_EVENT_TYPE);
}
OS_ENTER_CRITICAL();
// 有任务正在等待该信号量?
if (pevent->OSEventGrp != 0) /* See if any task waiting for semaphore*/
{
// 从等待列表中找出使最高优先级任务（Highest Priority Task – HPT），并将其置于就绪态。
(void)OS_EventTaskRdy(pevent, (void *)0, OS_STAT_SEM); /* Ready HPT waiting on event */
OS_EXIT_CRITICAL();
// 找出优先级最高的任务并进行任务切换
OS_Sched(); /* Find HPT ready to run */
return (OS_NO_ERR);
}
// 没有任务在等待信号量
if (pevent->OSEventCnt < 65535u) /* Make sure semaphore will not overflow */
{
// 计算器加一
pevent->OSEventCnt++; /* Increment semaphore count to register event */
OS_EXIT_CRITICAL();
return (OS_NO_ERR);
}
OS_EXIT_CRITICAL(); /* Semaphore value has reached its maximum */
return (OS_SEM_OVF);
}
INT8U OSTaskResume (INT8U prio)
{
OS_TCB *ptcb;
#if OS_CRITICAL_METHOD == 3 /* Storage for CPU status register */
OS_CPU_SR cpu_sr;
cpu_sr = 0; /* Prevent compiler warning */
#endif
#if OS_ARG_CHK_EN > 0
if (prio >= OS_LOWEST_PRIO) { /* Make sure task priority is valid */
return (OS_PRIO_INVALID);
}
#endif
OS_ENTER_CRITICAL();
ptcb = OSTCBPrioTbl[prio];
if (ptcb == (OS_TCB *)0) { /* Task to suspend must exist */
OS_EXIT_CRITICAL();
return (OS_TASK_RESUME_PRIO);
}
if (ptcb == (OS_TCB *)1) { /* See if assigned to Mutex */
OS_EXIT_CRITICAL();
return (OS_TASK_NOT_EXIST);
}
if ((ptcb->OSTCBStat & OS_STAT_SUSPEND) != OS_STAT_RDY) { /* Task must be suspended */
ptcb->OSTCBStat &= ~OS_STAT_SUSPEND; /* Remove suspension */
if (ptcb->OSTCBStat == OS_STAT_RDY) { /* See if task is now ready */
if (ptcb->OSTCBDly == 0) {
OSRdyGrp |= ptcb->OSTCBBitY; /* Yes, Make task ready to run */
OSRdyTbl[ptcb->OSTCBY] |= ptcb->OSTCBBitX;
OS_EXIT_CRITICAL();
OS_Sched();
} else {
OS_EXIT_CRITICAL();
}
} else { /* Must be pending on event */
OS_EXIT_CRITICAL();
}
return (OS_NO_ERR);
}
OS_EXIT_CRITICAL();
return (OS_TASK_NOT_SUSPENDED);
}
INT8U OSTaskSuspend (INT8U prio)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
BOOLEAN self;
OS_TCB *ptcb;
#if OS_ARG_CHK_EN > 0
if (prio == OS_IDLE_PRIO) { /* Not allowed to suspend idle task */
return (OS_TASK_SUSPEND_IDLE);
}
if (prio >= OS_LOWEST_PRIO && prio != OS_PRIO_SELF) { /* Task priority valid ? */
return (OS_PRIO_INVALID);
}
#endif
OS_ENTER_CRITICAL();
if (prio == OS_PRIO_SELF) { /* See if suspend SELF */
prio = OSTCBCur->OSTCBPrio;
self = TRUE;
} else if (prio == OSTCBCur->OSTCBPrio) { /* See if suspending self */
self = TRUE;
} else {
self = FALSE; /* No suspending another task */
}
ptcb = OSTCBPrioTbl[prio];
if (ptcb == (OS_TCB *)0) { /* Task to suspend must exist */
OS_EXIT_CRITICAL();
return (OS_TASK_SUSPEND_PRIO);
}
if ((OSRdyTbl[ptcb->OSTCBY] &= ~ptcb->OSTCBBitX) == 0x00) { /* Make task not ready */
OSRdyGrp &= ~ptcb->OSTCBBitY;
}
ptcb->OSTCBStat |= OS_STAT_SUSPEND; /* Status of task is 'SUSPENDED' */
OS_EXIT_CRITICAL();
if (self == TRUE) { /* Context switch only if SELF */
OS_Sched();
}
return (OS_NO_ERR);
}
INT8U OSTaskCreate (void (*task)(void *p_arg), void *p_arg, OS_STK *ptos, INT8U prio)
{
OS_STK *psp;
INT8U err;
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0;
#endif
#if OS_ARG_CHK_EN > 0
if (prio > OS_LOWEST_PRIO) { /* Make sure priority is within allowable range */
return (OS_ERR_PRIO_INVALID);
}
#endif
OS_ENTER_CRITICAL();
if (OSIntNesting > 0) { /* Make sure we don't create the task from within an ISR */
OS_EXIT_CRITICAL();
return (OS_ERR_TASK_CREATE_ISR);
}
if (OSTCBPrioTbl[prio] == (OS_TCB *)0) { /* Make sure task doesn't already exist at this priority */
OSTCBPrioTbl[prio] = OS_TCB_RESERVED;/* Reserve the priority to prevent others from doing ... */
/* ... the same thing until task is created. */
OS_EXIT_CRITICAL();
psp = OSTaskStkInit(task, p_arg, ptos, 0); /* Initialize the task's stack */
err = OS_TCBInit(prio, psp, (OS_STK *)0, 0, 0, (void *)0, 0);
if (err == OS_ERR_NONE) {
if (OSRunning == OS_TRUE) { /* Find highest priority task if multitasking has started */
OS_Sched();
}
} else {
OS_ENTER_CRITICAL();
OSTCBPrioTbl[prio] = (OS_TCB *)0;/* Make this priority available to others */
OS_EXIT_CRITICAL();
}
return (err);
}
OS_EXIT_CRITICAL();
return (OS_ERR_PRIO_EXIST);
}
void OSTimeDly (INT16U ticks)
{
INT8U y;
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
cpu_sr = 0; /* Prevent compiler warning */
#endif
if (ticks > 0) { /* 0 means no delay! */
OS_ENTER_CRITICAL();
y = OSTCBCur->OSTCBY; /* Delay current task */
OSRdyTbl[y] &= ~OSTCBCur->OSTCBBitX;
if (OSRdyTbl[y] == 0) {
OSRdyGrp &= ~OSTCBCur->OSTCBBitY;
}
OSTCBCur->OSTCBDly = ticks; /* Load ticks in TCB */
OS_EXIT_CRITICAL();
OS_Sched(); /* Find next task to run! */
}
}
void OSTimeDly (INT16U ticks)
{
INT8U y;
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0;
#endif
if (OSIntNesting > 0) { /* See if trying to call from an ISR */
return;
}
if (ticks > 0) { /* 0 means no delay! */
OS_ENTER_CRITICAL();
y = OSTCBCur->OSTCBY; /* Delay current task */
OSRdyTbl[y] &= ~OSTCBCur->OSTCBBitX;
if (OSRdyTbl[y] == 0) {
OSRdyGrp &= ~OSTCBCur->OSTCBBitY;
}
OSTCBCur->OSTCBDly = ticks; /* Load ticks in TCB */
OS_EXIT_CRITICAL();
OS_Sched(); /* Find next task to run! */
}
}