C++ (Cpp) max_lld_get_transmit_descriptor Exemples

Exemple #1

Fichier : mac.c Projet : dienbk7x/STM32-mini-demo

/**
 * @brief   Allocates a transmission descriptor.
 * @details One of the available transmission descriptors is locked and
 *          returned. If a descriptor is not currently available then the
 *          invoking thread is queued until one is freed.
 *
 * @param[in] macp      pointer to the @p MACDriver object
 * @param[out] tdp      pointer to a @p MACTransmitDescriptor structure
 * @param[in] time      the number of ticks before the operation timeouts,
 *                      the following special values are allowed:
 *                      - @a TIME_IMMEDIATE immediate timeout.
 *                      - @a TIME_INFINITE no timeout.
 *                      .
 * @return              The operation status.
 * @retval RDY_OK       the descriptor was obtained.
 * @retval RDY_TIMEOUT  the operation timed out, descriptor not initialized.
 */
msg_t macWaitTransmitDescriptor(MACDriver *macp,
                                MACTransmitDescriptor *tdp,
                                systime_t time) {
  msg_t msg;

  while (((msg = max_lld_get_transmit_descriptor(macp, tdp)) != RDY_OK) &&
         (time > 0)) {
    chSysLock();
    systime_t now = chTimeNow();
    if ((msg = chSemWaitTimeoutS(&macp->md_tdsem, time)) == RDY_TIMEOUT)
      break;
    if (time != TIME_INFINITE)
      time -= (chTimeNow() - now);
    chSysUnlock();
  }
  return msg;
}

Exemple #2

Fichier : mac.c Projet : jesstheaussie/Arduino-1

/**
 * @brief   Allocates a transmission descriptor.
 * @details One of the available transmission descriptors is locked and
 *          returned. If a descriptor is not currently available then the
 *          invoking thread is queued until one is freed.
 *
 * @param[in] macp      pointer to the @p MACDriver object
 * @param[out] tdp      pointer to a @p MACTransmitDescriptor structure
 * @param[in] time      the number of ticks before the operation timeouts,
 *                      the following special values are allowed:
 *                      - @a TIME_IMMEDIATE immediate timeout.
 *                      - @a TIME_INFINITE no timeout.
 *                      .
 * @return              The operation status.
 * @retval RDY_OK       the descriptor was obtained.
 * @retval RDY_TIMEOUT  the operation timed out, descriptor not initialized.
 *
 * @api
 */
msg_t macWaitTransmitDescriptor(MACDriver *macp,
                                MACTransmitDescriptor *tdp,
                                systime_t time) {
    msg_t msg;

    chDbgCheck((macp != NULL) && (tdp != NULL), "macWaitTransmitDescriptor");
    chDbgAssert(macp->state == MAC_ACTIVE, "macWaitTransmitDescriptor(), #1",
                "not active");

    while (((msg = max_lld_get_transmit_descriptor(macp, tdp)) != RDY_OK) &&
            (time > 0)) {
        chSysLock();
        systime_t now = chTimeNow();
        if ((msg = chSemWaitTimeoutS(&macp->tdsem, time)) == RDY_TIMEOUT) {
            chSysUnlock();
            break;
        }
        if (time != TIME_INFINITE)
            time -= (chTimeNow() - now);
        chSysUnlock();
    }
    return msg;
}