owner-nrf52sdk/nRF5_SDK_15.3.0/components/iot/socket/api/unistd.h

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/**@file unistd.h
 *
 * @defgroup iot_posix_unistd POSIX operating system API
 * @ingroup iot_sdk_socket
 * @{
 * @brief POSIX standard functions.
 */
#ifndef SOCKET_UNISTD_H__
#define SOCKET_UNISTD_H__

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @brief POSIX sleep function.
 *
 * @note Uses busy looping nrf_delay.
 *
 * @param[in] seconds The number of seconds to sleep.
 *
 * @return The number of seconds slept.
 */
unsigned int sleep(unsigned int seconds);

/**
 * @brief POSIX usleep function.
 *
 * @note Uses busy looping nrf_delay.
 *
 * @param[in] useconds The number of microseconds to sleep.
 *
 * @return The number of microseconds slept.
 */
unsigned int usleep(unsigned int useconds);

#ifdef __cplusplus
}
#endif

#endif // SOCKET_UNISTD_H__

/**@} */