CMSIS_5/CMSIS/RTOS2/RTX/Source/rtx_delay.c

/*
 * Copyright (c) 2013-2016 ARM Limited. All rights reserved.
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed under the Apache License, Version 2.0 (the License); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * -----------------------------------------------------------------------------
 *
 * Project:     CMSIS-RTOS RTX
 * Title:       Delay functions
 *
 * -----------------------------------------------------------------------------
 */

#include "rtx_lib.h"


//  ==== Service Calls ====

//  Service Calls definitions
SVC0_1(Delay,      osStatus_t, uint32_t)
SVC0_1(DelayUntil, osStatus_t, uint64_t)

/// Wait for Timeout (Time Delay).
/// \note API identical to osDelay
osStatus_t os_svcDelay (uint32_t millisec) {

  if (millisec == 0U) {
    return osOK;
  }

  os_ThreadWaitEnter(os_ThreadWaitingDelay, millisec);

  return osOK;
}

/// Wait until specified time.
/// \note API identical to osDelayUntil
osStatus_t os_svcDelayUntil (uint64_t millisec) {

  millisec -= os_Info.kernel.time;
  if (millisec >= 0xFFFFFFFFU) {
    return osError;
  }

  os_ThreadWaitEnter(os_ThreadWaitingDelay, (uint32_t)millisec);

  return osOK;
}


//  ==== Public API ====

/// Wait for Timeout (Time Delay).
osStatus_t osDelay (uint32_t millisec) {
  if (__get_IPSR() != 0U) {
    return osErrorISR;                          // Not allowed in ISR
  }
  return __svcDelay(millisec);
}

/// Wait until specified time.
osStatus_t osDelayUntil (uint64_t millisec) {
  if (__get_IPSR() != 0U) {
    return osErrorISR;                          // Not allowed in ISR
  }
  return __svcDelayUntil(millisec);
}