1 /* 2 * SPDX-FileCopyrightText: 2018-2022 Espressif Systems (Shanghai) CO LTD 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #ifndef _ESP_PLATFORM_SYS_POLL_H_ 8 #define _ESP_PLATFORM_SYS_POLL_H_ 9 10 #define POLLIN (1u << 0) /* data other than high-priority may be read without blocking */ 11 #define POLLRDNORM (1u << 1) /* normal data may be read without blocking */ 12 #define POLLRDBAND (1u << 2) /* priority data may be read without blocking */ 13 #define POLLPRI (POLLRDBAND) /* high-priority data may be read without blocking */ 14 // Note: POLLPRI is made equivalent to POLLRDBAND in order to fit all these events into one byte 15 #define POLLOUT (1u << 3) /* normal data may be written without blocking */ 16 #define POLLWRNORM (POLLOUT) /* equivalent to POLLOUT */ 17 #define POLLWRBAND (1u << 4) /* priority data my be written */ 18 #define POLLERR (1u << 5) /* some poll error occurred */ 19 #define POLLHUP (1u << 6) /* file descriptor was "hung up" */ 20 #define POLLNVAL (1u << 7) /* the specified file descriptor is invalid */ 21 22 #ifdef __cplusplus 23 extern "C" { 24 #endif 25 26 struct pollfd { 27 int fd; /* The descriptor. */ 28 short events; /* The event(s) is/are specified here. */ 29 short revents; /* Events found are returned here. */ 30 }; 31 32 typedef unsigned int nfds_t; 33 34 int poll(struct pollfd *fds, nfds_t nfds, int timeout); 35 36 #ifdef __cplusplus 37 } // extern "C" 38 #endif 39 40 #endif // _ESP_PLATFORM_SYS_POLL_H_ 41
