diff --git a/components/newlib/platform_include/sys/select.h b/components/newlib/platform_include/sys/select.h index ca7e4a4a28f..cc6429bd910 100644 --- a/components/newlib/platform_include/sys/select.h +++ b/components/newlib/platform_include/sys/select.h @@ -34,4 +34,17 @@ int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct #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__