/**
* @brief Resets a @p mailbox_t object.
* @details All the waiting threads are resumed with status @p MSG_RESET and
* the queued messages are lost.
*
* @param[in] mbp the pointer to an initialized @p mailbox_t object
*
* @api
*/
void chMBReset(mailbox_t *mbp) {
chDbgCheck(mbp != NULL);
chSysLock();
mbp->mb_wrptr = mbp->mb_rdptr = mbp->mb_buffer;
chSemResetI(&mbp->mb_emptysem, mbp->mb_top - mbp->mb_buffer);
chSemResetI(&mbp->mb_fullsem, 0);
chSchRescheduleS();
chSysUnlock();
}
/**
* @brief Deactivates the CAN peripheral.
*
* @param[in] canp pointer to the @p CANDriver object
*
* @api
*/
void canStop(CANDriver *canp) {
chDbgCheck(canp != NULL, "canStop");
chSysLock();
chDbgAssert((canp->state == CAN_STOP) || (canp->state == CAN_READY),
"canStop(), #1", "invalid state");
can_lld_stop(canp);
chSemResetI(&canp->rxsem, 0);
chSemResetI(&canp->txsem, 0);
chSchRescheduleS();
canp->state = CAN_STOP;
canp->status = 0;
chSysUnlock();
}
/**
* @brief Performs a reset operation on the semaphore.
* @post After invoking this function all the threads waiting on the
* semaphore, if any, are released and the semaphore counter is set
* to the specified, non negative, value.
* @post This function does not reschedule so a call to a rescheduling
* function must be performed before unlocking the kernel. Note that
* interrupt handlers always reschedule on exit so an explicit
* reschedule must not be performed in ISRs.
*
* @param[in] sp pointer to a @p semaphore_t structure
* @param[in] n the new value of the semaphore counter. The value must
* be non-negative.
*
* @api
*/
void chSemReset(semaphore_t *sp, cnt_t n) {
chSysLock();
chSemResetI(sp, n);
chSchRescheduleS();
chSysUnlock();
}
THD_FUNCTION(test_support, arg) {
#if CH_CFG_USE_EVENTS == TRUE
thread_t *tp = (thread_t *)arg;
#else
(void)arg;
#endif
/* Initializing global resources.*/
chSemObjectInit(&gsem1, 0);
chSemObjectInit(&gsem2, 0);
while (true) {
chSysLock();
if (chSemGetCounterI(&gsem1) < 0)
chSemSignalI(&gsem1);
chSemResetI(&gsem2, 0);
chThdResumeI(>r1, MSG_OK);
#if CH_CFG_USE_EVENTS == TRUE
chEvtSignalI(tp, 0x55);
#endif
chSchRescheduleS();
chSysUnlock();
chThdSleepMilliseconds(250);
}
}
/**
* @brief Stops an ongoing conversion.
*
* @param[in] adcp pointer to the @p ADCDriver object
*/
void adcStopConversion(ADCDriver *adcp) {
chDbgCheck(adcp != NULL, "adcStopConversion");
chSysLock();
chDbgAssert((adcp->ad_state == ADC_READY) ||
(adcp->ad_state == ADC_RUNNING) ||
(adcp->ad_state == ADC_COMPLETE),
"adcStopConversion(), #1",
"invalid state");
if (adcp->ad_state == ADC_RUNNING) {
adc_lld_stop_conversion(adcp);
adcp->ad_grpp = NULL;
adcp->ad_state = ADC_READY;
chSemResetI(&adcp->ad_sem, 0);
chSchRescheduleS();
}
else
adcp->ad_state = ADC_READY;
chSysUnlock();
}
void CounterSemaphore::resetI(cnt_t n) {
chSemResetI(&sem, n);
}
inline
void Semaphore_::reset_unsafe(Count value) {
chSemResetI(&impl, value);
}
/**
* @brief Resets an output queue.
* @details All the data in the output queue is erased and lost, any waiting
* thread is resumed with status @p Q_RESET.
* @note A reset operation can be used by a low level driver in order to
* obtain immediate attention from the high level layers.
*
* @param[in] oqp pointer to an @p OutputQueue structure
*
* @iclass
*/
void chOQResetI(OutputQueue *oqp) {
oqp->q_rdptr = oqp->q_wrptr = oqp->q_buffer;
chSemResetI(&oqp->q_sem, (cnt_t)(oqp->q_top - oqp->q_buffer));
}
/**
* @brief Resets an input queue.
* @details All the data in the input queue is erased and lost, any waiting
* thread is resumed with status @p Q_RESET.
* @note A reset operation can be used by a low level driver in order to
* obtain immediate attention from the high level layers.
*
* @param[in] iqp pointer to an @p InputQueue structure
*
* @iclass
*/
void chIQResetI(InputQueue *iqp) {
iqp->q_rdptr = iqp->q_wrptr = iqp->q_buffer;
chSemResetI(&iqp->q_sem, 0);
}
