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