/* ----------------------------------------------------------------------------
 * Copyright (c) Huawei Technologies Co., Ltd. 2013-2019. All rights reserved.
 * Description: Error
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice,this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice,this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * --------------------------------------------------------------------------- */
/* ----------------------------------------------------------------------------
 * Notice of Export Control Law
 * ===============================================
 * Huawei LiteOS may be subject to applicable export control laws and regulations,
 * which might include those applicable to Huawei LiteOS of U.S. and the country
 * in which you are located.
 * Import, export and usage of Huawei LiteOS in any manner by you shall be in
 * compliance with such applicable export control laws and regulations.
 * --------------------------------------------------------------------------- */

#include "errno.h"
#include "los_errno.h"
#include "los_task.h"

int errno_array[LOSCFG_BASE_CORE_TSK_CONFIG + 1];

/* the specific errno get or set in interrupt service routine */
static int errno_isr;

void set_errno(int err_code) {
  /* errno can not be set to 0 as posix standard */
  if (err_code == 0)
    return;

  if (OS_INT_INACTIVE)
    errno_array[LOS_CurTaskIDGet()] = err_code;
  else
    errno_isr = err_code;
}

int get_errno(void) {
  if (OS_INT_INACTIVE)
    return errno_array[LOS_CurTaskIDGet()];
  else
    return errno_isr;
}

int *__errno_location(void) {
  if (OS_INT_INACTIVE)
    return &errno_array[LOS_CurTaskIDGet()];
  else
    return &errno_isr;
}

volatile int *__os_errno(void) {
  if (OS_INT_INACTIVE)
    return (volatile int *)(&errno_array[LOS_CurTaskIDGet()]);
  else
    return (volatile int *)(&errno_isr);
}

