消息邮箱发送（扩展）

#if OS_MBOX_POST_OPT_EN > 0u
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 > 0uif (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);}#endifif (pevent->OSEventType != OS_EVENT_TYPE_MBOX)    /* Validate event block type                     */{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);
}
#endif

从消息邮箱获取/无等待

#if OS_MBOX_ACCEPT_EN > 0u
void  *OSMboxAccept (OS_EVENT *pevent)
{void      *pmsg;
#if OS_CRITICAL_METHOD == 3u                              /* Allocate storage for CPU status register  */OS_CPU_SR  cpu_sr = 0u;
#endif
#if OS_ARG_CHK_EN > 0uif (pevent == (OS_EVENT *)0)                          /* Validate 'pevent'                         */{return ((void *)0);}#endifif (pevent->OSEventType != OS_EVENT_TYPE_MBOX)        /* Validate event block type                 */{return ((void *)0);}OS_ENTER_CRITICAL();pmsg               = pevent->OSEventPtr;pevent->OSEventPtr = (void *)0;                       /* Clear the mailbox                         */OS_EXIT_CRITICAL();return (pmsg);                                        /* Return the message received (or NULL)     */
}
#endif

消息邮箱状态查询

#if OS_MBOX_QUERY_EN > 0u
INT8U  OSMboxQuery (OS_EVENT      *pevent,OS_MBOX_DATA  *p_mbox_data)
{INT8U       i;OS_PRIO    *psrc;OS_PRIO    *pdest;
#if OS_CRITICAL_METHOD == 3u                               /* Allocate storage for CPU status register */OS_CPU_SR   cpu_sr = 0u;
#endif
#if OS_ARG_CHK_EN > 0uif (pevent == (OS_EVENT *)0)                           /* Validate 'pevent'                        */{return (OS_ERR_PEVENT_NULL);}if (p_mbox_data == (OS_MBOX_DATA *)0)                  /* Validate 'p_mbox_data'                   */{return (OS_ERR_PDATA_NULL);}#endifif (pevent->OSEventType != OS_EVENT_TYPE_MBOX)         /* Validate event block type                */{return (OS_ERR_EVENT_TYPE);}OS_ENTER_CRITICAL();p_mbox_data->OSEventGrp = pevent->OSEventGrp;          /* Copy message mailbox wait list           */psrc                    = &pevent->OSEventTbl[0];pdest                   = &p_mbox_data->OSEventTbl[0];for (i = 0u; i < OS_EVENT_TBL_SIZE; i++){*pdest++ = *psrc++;}p_mbox_data->OSMsg = pevent->OSEventPtr;               /* Get message from mailbox                 */OS_EXIT_CRITICAL();return (OS_ERR_NONE);
}
#endif 

消息邮箱中断等待

#if OS_MBOX_PEND_ABORT_EN > 0u
INT8U  OSMboxPendAbort (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_CRITICALif (perr == (INT8U *)0){OS_SAFETY_CRITICAL_EXCEPTION();return (0u);}#endif
#if OS_ARG_CHK_EN > 0uif (pevent == (OS_EVENT *)0)                           /* Validate 'pevent'                        */{*perr = OS_ERR_PEVENT_NULL;return (0u);}#endifif (pevent->OSEventType != OS_EVENT_TYPE_MBOX)         /* Validate event block type                */{*perr = OS_ERR_EVENT_TYPE;return (0u);}OS_ENTER_CRITICAL();if (pevent->OSEventGrp != 0u)                          /* See if any task waiting on mailbox?      */{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 mailbox  */{(void)OS_EventTaskRdy (pevent, (void *)0, OS_STAT_MBOX, OS_STAT_PEND_ABORT);nbr_tasks++;}break;case OS_PEND_OPT_NONE:default:                                       /* No,  ready HPT       waiting on mailbox  */(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                    */*perr = OS_ERR_PEND_ABORT;return (nbr_tasks);}OS_EXIT_CRITICAL();*perr = OS_ERR_NONE;return (0u);                                           /* No tasks waiting on mailbox              */
}
#endif

用邮箱作为二值信号量（无）

用邮箱实现延时（无）