esp-idf/components/newlib/platform_include/sys/poll.h

49 wiersze
1.9 KiB
C

// Copyright 2018-2019 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef _ESP_PLATFORM_SYS_POLL_H_
#define _ESP_PLATFORM_SYS_POLL_H_
#define POLLIN (1u << 0) /* data other than high-priority may be read without blocking */
#define POLLRDNORM (1u << 1) /* normal data may be read without blocking */
#define POLLRDBAND (1u << 2) /* priority data may be read without blocking */
#define POLLPRI (POLLRDBAND) /* high-priority data may be read without blocking */
// Note: POLLPRI is made equivalent to POLLRDBAND in order to fit all these events into one byte
#define POLLOUT (1u << 3) /* normal data may be written without blocking */
#define POLLWRNORM (POLLOUT) /* equivalent to POLLOUT */
#define POLLWRBAND (1u << 4) /* priority data my be written */
#define POLLERR (1u << 5) /* some poll error occurred */
#define POLLHUP (1u << 6) /* file descriptor was "hung up" */
#define POLLNVAL (1u << 7) /* the specified file descriptor is invalid */
#ifdef __cplusplus
extern "C" {
#endif
struct pollfd {
int fd; /* The descriptor. */
short events; /* The event(s) is/are specified here. */
short revents; /* Events found are returned here. */
};
typedef unsigned int nfds_t;
int poll(struct pollfd *fds, nfds_t nfds, int timeout);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // _ESP_PLATFORM_SYS_POLL_H_