The following example illustrates how the aio_error() and aio_return() functions can be used.
// icx aio_sample4.c
// aio_sample4.exe
#include <aio.h>
#include <stdio.h>
typedef struct aiocb aiocb_t;
aiocb_t my_aio;
#define IC_AIO_DATA_INIT(_aio, _fd, _dat, _len, _off)\
{memset(&_aio, 0, sizeof(_aio)); \
_aio.aio_fildes = _fd; \
_aio.aio_buf = _dat; \
_aio.aio_nbytes = _len; \
_aio.aio_offset = _off;}
int main()
{
static struct aiocb aio;
static struct aiocb *aio_list[] = {&aio};
int ret;
char *dat = "Hello from Ex-3\n";
HANDLE fd = CreateFile("dat",
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ,
NULL,
OPEN_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL);
/* Data initialization and asynchronously writing */
IC_AIO_DATA_INIT(aio, fd, dat, strlen(dat), 0);
aio_write(&aio) ;
ret = aio_error(&aio);
if ( ret == EINPROGRESS ) {
fprintf(stderr, "ERRNO=%d STR=%s\n", ret, strerror(ret));
ret = aio_suspend(aio_list, 1, NULL);
if (ret == -1) return errno;
}
else if (ret) return ret;
ret = aio_error(&aio);
if (ret) return ret;
ret = aio_return(&aio);
printf("ret=%d\n", ret);
return 0;
}
> ./a.out
ERRNO=996 STR=Unknown error
> type dat
Hello from Ex-3