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implement POSIX asynchronous io

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some features are not yet supported, and only minimal testing has been
performed. should be considered experimental at this point.
This commit is contained in:
Rich Felker
2011-09-09 01:07:38 -04:00
parent 96cea94ad2
commit b4de6f93ae
8 changed files with 398 additions and 0 deletions
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60
include/aio.h Normal file
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#ifndef _AIO_H
#define _AIO_H
#ifdef __cplusplus
extern "C" {
#endif
#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
#include <signal.h>
#include <time.h>
#define __NEED_ssize_t
#define __NEED_off_t
#include <bits/alltypes.h>
struct aiocb {
int aio_filedes, aio_lio_opcode, aio_reqprio;
volatile void *aio_buf;
size_t aio_nbytes;
struct sigevent aio_sigevent;
void *__td;
int __lock[2];
int __err;
ssize_t __ret;
off_t aio_offset;
void *__next, *__prev;
char __dummy4[32-2*sizeof(void *)];
};
#define AIO_CANCELED 0
#define AIO_NOTCANCELED 1
#define AIO_ALLDONE 2
#define LIO_READ 0
#define LIO_WRITE 1
#define LIO_NOP 2
#define LIO_WAIT 0
#define LIO_NOWAIT 1
int aio_read(struct aiocb *);
int aio_write(struct aiocb *);
int aio_error(struct aiocb *);
ssize_t aio_return(struct aiocb *);
int aio_cancel(int, struct aiocb *);
int aio_suspend(struct aiocb *const [], int, const struct timespec *);
int aio_fsync(int, struct aiocb *);
int lio_listio(int, struct aiocb *const [], int, struct sigevent *);
#endif
#ifdef __cplusplus
}
#endif
#endif