51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
/* Copyright 2018 Canaan Inc.
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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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*/
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#ifndef _POSIX_SYS_IOCTL_H
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#define _POSIX_SYS_IOCTL_H
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#include <stddef.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#define IOCPARM_MASK 0x7fU /* parameters must be < 128 bytes */
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#define IOC_VOID 0x20000000UL /* no parameters */
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#define IOC_OUT 0x40000000UL /* copy out parameters */
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#define IOC_IN 0x80000000UL /* copy in parameters */
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#define IOC_INOUT (IOC_IN | IOC_OUT) /* 0x20000000 distinguishes new & old ioctl's */
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#define _IO(x, y) (IOC_VOID | ((x) << 8) | (y))
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#define _IOR(x, y, t) (IOC_OUT | (((unsigned int)sizeof(t) & IOCPARM_MASK) << 16) | ((x) << 8) | (y))
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#define _IOW(x, y, t) (IOC_IN | (((unsigned int)sizeof(t) & IOCPARM_MASK) << 16) | ((x) << 8) | (y))
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#ifndef FIONREAD
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#define FIONREAD _IOR('f', 127, unsigned int) /* get # bytes to read */
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#endif
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#ifndef FIONBIO
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#define FIONBIO _IOW('f', 126, unsigned int) /* set/clear non-blocking i/o */
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#endif
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int ioctl(int handle, unsigned int cmd, void *argp);
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#ifdef __cplusplus
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}
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#endif
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#endif |