/* * SPDX-FileCopyrightText: 2018-2022 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 */ #ifndef __ESP_SYS_SELECT_H__ #define __ESP_SYS_SELECT_H__ /* Newlib 2.2.0 does not provide sys/select.h, and fd_set is defined in sys/types.h */ #include <sys/types.h> #ifndef fd_set #include_next <sys/select.h> #else // fd_set #include <sys/time.h> #ifdef __cplusplus extern "C" { #endif int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct timeval *timeout); #ifdef __cplusplus } // extern "C" #endif #endif // fd_set #if defined(FD_ISSET) || defined(FD_SET) || defined(FD_CLR) #undef FD_SET #undef FD_CLR #undef FD_ISSET #define __FD_SAFE_SET(n, code) do { if ((unsigned)(n) < FD_SETSIZE) { code; } } while(0) #define __FD_SAFE_GET(n, code) (((unsigned)(n) < FD_SETSIZE) ? (code) : 0) #define FD_SET(n, p) __FD_SAFE_SET(n, ((p)->fds_bits[(n) / NFDBITS] |= (1L << ((n) % NFDBITS)))) #define FD_CLR(n, p) __FD_SAFE_SET(n, ((p)->fds_bits[(n) / NFDBITS] &= ~(1L << ((n) % NFDBITS)))) #define FD_ISSET(n, p) __FD_SAFE_GET(n, ((p)->fds_bits[(n) / NFDBITS] & (1L << ((n) % NFDBITS)))) #endif // FD_ISSET || FD_SET || FD_CLR #endif //__ESP_SYS_SELECT_H__