Asynchronous I/O library

Dimitry Snezhkov — Wed, 30 Apr 2003 17:13:22 GMT

Hello,

I am receiving the following message when trying to link
a program containing calls
to asynchronous I/O operations on HP-UX 11.0

# /usr/bin/cc wr.c
/usr/ccs/bin/ld: Unsatisfied symbols:
aio_write (first referenced in wr.o) (code)

Where on HP-UX is the async I/O library?

Here's a piece of my code :

#include
#include
#include

#define FILESZ ( 1024 * 1024 *64 )
main(){
struct aiocb aio;
void *buf;
time_t time1, time2;
int err,cnt =2;

buf = ( void * )malloc(FILESZ);
aio.aio_fildes=open("/tmp/file",O_WRONLY);
aio.aio_buf = buf;
aio.aio_offset=0;
aio.aio_nbytes=FILESZ;
aio.aio_reqprio=0;

time(&time1);
err = aio_write(&aio);
while (( err = aio_error(&aio)) == EINPROGRESS){
sleep(1);
}
time(&time2);
printf("The I/O took %d seconds\n", time2-time1 );

}

Thanks a lot for any pointers.

Dimitry.

Re: Asynchronous I/O library

Umapathy S — Wed, 30 Apr 2003 17:19:43 GMT

from the man page

aio_write(2) aio_write(2)

To use this function, link in the realtime library by specifying -lrt
on the compiler or linker command line.

Just end with -lrt when linking. This will do.

HTH
Umapathy

Re: Asynchronous I/O library

Dimitry Snezhkov — Wed, 30 Apr 2003 17:33:33 GMT

Fixed.

thanks a lot

topic Asynchronous I/O library in Operating System - HP-UX

Asynchronous I/O library

Re: Asynchronous I/O library

Re: Asynchronous I/O library