/**
* @brief Performs a wait operation on a semaphore.
*
* @param[in] sp pointer to a @p Semaphore structure
* @return A message specifying how the invoking thread has been
* released from the semaphore.
* @retval RDY_OK if the thread has not stopped on the semaphore or the
* semaphore has been signaled.
* @retval RDY_RESET if the semaphore has been reset using @p chSemReset().
*
* @api
*/
msg_t chSemWait(Semaphore *sp) {
msg_t msg;
chSysLock();
msg = chSemWaitS(sp);
chSysUnlock();
return msg;
}
/**
* @brief Gains exclusive access to the ILI9341 module.
* @details This function tries to gain ownership to the ILI9341 module, if the
* module is already being used then the invoking thread is queued.
* @pre In order to use this function the option
* @p ILI9341_USE_MUTUAL_EXCLUSION must be enabled.
* @pre ILI9341 is ready.
*
* @param[in] driverp pointer to the @p ILI9341Driver object
*
* @sclass
*/
void ili9341AcquireBusS(ILI9341Driver *driverp) {
osalDbgCheckClassS();
osalDbgCheck(driverp == &ILI9341D1);
osalDbgAssert(driverp->state == ILI9341_READY, "not ready");
#if (TRUE == CH_CFG_USE_MUTEXES)
chMtxLockS(&driverp->lock);
#else
chSemWaitS(&driverp->lock);
#endif
}
msg_t CounterSemaphore::waitS(void) {
return chSemWaitS(&sem);
}
inline
void Semaphore_::wait_unsafe() {
chSemWaitS(&impl);
}