initial commit

2024-08-18 02:50:11 -06:00
commit c6f61bffb0
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+/*
+ * SPDX-FileCopyrightText: 2018-2024 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__