76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/****************************************************************************
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* include/sys/eventfd.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __INCLUDE_SYS_EVENTFD_H
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#define __INCLUDE_SYS_EVENTFD_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdint.h>
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#include <fcntl.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define EFD_NONBLOCK O_NONBLOCK
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#define EFD_SEMAPHORE O_BINARY
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#define EFD_CLOEXEC O_CLOEXEC
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/* Get device minor number */
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#define EFD_FIOC_MINOR FIOC_MINOR
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/****************************************************************************
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* Public Type Declarations
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****************************************************************************/
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/* Type for event counter */
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typedef uint32_t eventfd_t;
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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int eventfd(unsigned int count, int flags);
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int eventfd_read(int fd, FAR eventfd_t *value);
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int eventfd_write(int fd, eventfd_t value);
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int eventfd_get_minor(int fd);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __INCLUDE_SYS_EVENTFD_H */
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