esp-idf/components/newlib/sysconf.c

/*
 * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <unistd.h>
#include <errno.h>
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"

#define CPU_NUM portNUM_PROCESSORS

long sysconf(int arg)
{
    switch (arg) {
    case _SC_NPROCESSORS_CONF:
    case _SC_NPROCESSORS_ONLN:
        return CPU_NUM;
    default:
        errno = EINVAL;
        return -1;
    }
}