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51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
// Copyright 2018 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_SYS_SELECT_H__
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#define __ESP_SYS_SELECT_H__
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/* Newlib 2.2.0 does not provide sys/select.h, and fd_set is defined in sys/types.h */
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#include <sys/types.h>
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#ifndef fd_set
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#include_next <sys/select.h>
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#else // fd_set
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#include <sys/time.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct timeval *timeout);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // fd_set
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#if defined(FD_ISSET) || defined(FD_SET) || defined(FD_CLR)
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#undef FD_SET
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#undef FD_CLR
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#undef FD_ISSET
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#define __FD_SAFE_SET(n, code) do { if ((unsigned)(n) < FD_SETSIZE) { code; } } while(0)
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#define __FD_SAFE_GET(n, code) (((unsigned)(n) < FD_SETSIZE) ? (code) : 0)
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#define FD_SET(n, p) __FD_SAFE_SET(n, ((p)->fds_bits[(n) / NFDBITS] |= (1L << ((n) % NFDBITS))))
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#define FD_CLR(n, p) __FD_SAFE_SET(n, ((p)->fds_bits[(n) / NFDBITS] &= ~(1L << ((n) % NFDBITS))))
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#define FD_ISSET(n, p) __FD_SAFE_GET(n, ((p)->fds_bits[(n) / NFDBITS] & (1L << ((n) % NFDBITS))))
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#endif // FD_ISSET || FD_SET || FD_CLR
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#endif //__ESP_SYS_SELECT_H__
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