6c8f7fc3ba
. add all sys/sys headers not already present to help compiling . take netbsd dirent.h and struct dirent; main result is introducing d_type and d_namlen that have to be set by getdents() in all FS code implementing it . d_off is gone . alignment of the struct has become 8 bytes instead of 4 . remove _MAX_BLOCK_SIZE, _MIN_BLOCK_SIZE, _STATIC_BLOCK_SIZE . libminlib: cleanup unused yet duplicate code . mfs: throw out the long-broken v1, v2 support . new test for dirent contents filled by getdents() Change-Id: I1459755c7ba5e5d1c9396d3a587ce6e63ddc283e
127 lines
3.9 KiB
C
127 lines
3.9 KiB
C
/* $NetBSD: aio.h,v 1.12 2012/01/07 19:48:19 christos Exp $ */
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/*
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* Copyright (c) 2007, Mindaugas Rasiukevicius <rmind at NetBSD org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _SYS_AIO_H_
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#define _SYS_AIO_H_
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#include <sys/types.h>
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#include <sys/signal.h>
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/* Returned by aio_cancel() */
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#define AIO_CANCELED 0x1
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#define AIO_NOTCANCELED 0x2
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#define AIO_ALLDONE 0x3
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/* LIO opcodes */
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#define LIO_NOP 0x0
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#define LIO_WRITE 0x1
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#define LIO_READ 0x2
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/* LIO modes */
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#define LIO_NOWAIT 0x0
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#define LIO_WAIT 0x1
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/*
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* Asynchronous I/O structure.
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* Defined in the Base Definitions volume of IEEE Std 1003.1-2001 .
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*/
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struct aiocb {
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off_t aio_offset; /* File offset */
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volatile void *aio_buf; /* I/O buffer in process space */
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size_t aio_nbytes; /* Length of transfer */
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int aio_fildes; /* File descriptor */
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int aio_lio_opcode; /* LIO opcode */
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int aio_reqprio; /* Request priority offset */
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struct sigevent aio_sigevent; /* Signal to deliver */
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/* Internal kernel variables */
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int _state; /* State of the job */
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int _errno; /* Error value */
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ssize_t _retval; /* Return value */
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};
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/* Internal kernel data */
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#ifdef _KERNEL
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/* Default limits of allowed AIO operations */
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#define AIO_LISTIO_MAX 512
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#define AIO_MAX AIO_LISTIO_MAX * 16
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#include <sys/condvar.h>
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#include <sys/lwp.h>
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#include <sys/mutex.h>
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#include <sys/pool.h>
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#include <sys/queue.h>
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/* Operations (as flags) */
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#define AIO_LIO 0x00
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#define AIO_READ 0x01
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#define AIO_WRITE 0x02
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#define AIO_SYNC 0x04
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#define AIO_DSYNC 0x08
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/* Job states */
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#define JOB_NONE 0x0
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#define JOB_WIP 0x1
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#define JOB_DONE 0x2
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/* Structure of AIO job */
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struct aio_job {
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int aio_op; /* Operation code */
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struct aiocb aiocbp; /* AIO data structure */
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void *aiocb_uptr; /* User-space pointer for identification of job */
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TAILQ_ENTRY(aio_job) list;
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struct lio_req *lio;
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};
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/* LIO structure */
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struct lio_req {
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u_int refcnt; /* Reference counter */
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struct sigevent sig; /* Signal of lio_listio() calls */
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};
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/* Structure of AIO data for process */
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struct aioproc {
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kmutex_t aio_mtx; /* Protects the entire structure */
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kcondvar_t aio_worker_cv; /* Signals on a new job */
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kcondvar_t done_cv; /* Signals when the job is done */
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struct aio_job *curjob; /* Currently processing AIO job */
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unsigned int jobs_count; /* Count of the jobs */
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TAILQ_HEAD(, aio_job) jobs_queue;/* Queue of the AIO jobs */
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struct lwp *aio_worker; /* AIO worker thread */
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};
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extern u_int aio_listio_max;
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/* Prototypes */
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void aio_print_jobs(void (*)(const char *, ...) __printflike(1, 2));
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int aio_suspend1(struct lwp *, struct aiocb **, int, struct timespec *);
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#endif /* _KERNEL */
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#endif /* _SYS_AIO_H_ */
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