1 // Copyright 2018 Espressif Systems (Shanghai) PTE LTD 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef __ESP_SYS_SELECT_H__ 16 #define __ESP_SYS_SELECT_H__ 17 18 /* Newlib 2.2.0 does not provide sys/select.h, and fd_set is defined in sys/types.h */ 19 #include <sys/types.h> 20 #ifndef fd_set 21 #include_next <sys/select.h> 22 #else // fd_set 23 #include <sys/time.h> 24 25 #ifdef __cplusplus 26 extern "C" { 27 #endif 28 29 int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct timeval *timeout); 30 31 #ifdef __cplusplus 32 } // extern "C" 33 #endif 34 35 #endif // fd_set 36 37 #if defined(FD_ISSET) || defined(FD_SET) || defined(FD_CLR) 38 #undef FD_SET 39 #undef FD_CLR 40 #undef FD_ISSET 41 42 #define __FD_SAFE_SET(n, code) do { if ((unsigned)(n) < FD_SETSIZE) { code; } } while(0) 43 #define __FD_SAFE_GET(n, code) (((unsigned)(n) < FD_SETSIZE) ? (code) : 0) 44 45 #define FD_SET(n, p) __FD_SAFE_SET(n, ((p)->fds_bits[(n) / NFDBITS] |= (1L << ((n) % NFDBITS)))) 46 #define FD_CLR(n, p) __FD_SAFE_SET(n, ((p)->fds_bits[(n) / NFDBITS] &= ~(1L << ((n) % NFDBITS)))) 47 #define FD_ISSET(n, p) __FD_SAFE_GET(n, ((p)->fds_bits[(n) / NFDBITS] & (1L << ((n) % NFDBITS)))) 48 #endif // FD_ISSET || FD_SET || FD_CLR 49 50 #endif //__ESP_SYS_SELECT_H__ 51