83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
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/* aio.h: Support for Posix asynchronous i/o routines.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _AIO_H
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#define _AIO_H
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#include <sys/features.h>
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#include <sys/queue.h>
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#include <sys/signal.h>
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#include <sys/types.h>
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#include <limits.h> // for AIO_LISTIO_MAX, AIO_MAX, and AIO_PRIO_DELTA_MAX
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/* defines for return value of aio_cancel() */
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#define AIO_ALLDONE 0
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#define AIO_CANCELED 1
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#define AIO_NOTCANCELED 2
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/* defines for 'mode' argument of lio_listio() */
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#define LIO_NOWAIT 0
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#define LIO_WAIT 1
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/* defines for 'aio_lio_opcode' element of struct aiocb */
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#define LIO_NOP 0
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#define LIO_READ 1
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#define LIO_WRITE 2
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* struct __liocb is Cygwin-specific */
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struct __liocb {
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volatile uint32_t lio_count;
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struct sigevent *lio_sigevent;
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};
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/* struct __wincb is Cygwin-specific */
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struct __wincb {
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int32_t status; /* These two fields must be first... */
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uintptr_t info; /* ...and must be adjacent, in this order */
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void *event;
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};
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/* struct aiocb is defined by Posix */
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struct aiocb {
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/* these elements of aiocb are Cygwin-specific */
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TAILQ_ENTRY(aiocb) aio_chain;
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struct __liocb *aio_liocb;
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struct __wincb aio_wincb;
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ssize_t aio_rbytes;
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int aio_errno;
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/* the remaining elements of aiocb are defined by Posix */
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int aio_lio_opcode;
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int aio_reqprio; /* Not yet implemented; must be zero */
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int aio_fildes;
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volatile void *aio_buf;
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size_t aio_nbytes;
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off_t aio_offset;
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struct sigevent aio_sigevent;
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};
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/* function prototypes as defined by Posix */
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int aio_cancel (int, struct aiocb *);
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int aio_error (const struct aiocb *);
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int aio_fsync (int, struct aiocb *);
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int aio_read (struct aiocb *);
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ssize_t aio_return (struct aiocb *);
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int aio_suspend (const struct aiocb *const [], int,
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const struct timespec *);
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int aio_write (struct aiocb *);
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int lio_listio (int, struct aiocb *__restrict const [__restrict], int,
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struct sigevent *__restrict);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _AIO_H */
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