testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/7-1.c

/*
 * Copyright (c) 2004, Bull SA. All rights reserved.
 * Created by:  Laurent.Vivier@bull.net
 * This file is licensed under the GPL license.  For the full content
 * of this license, see the COPYING file at the top level of this 
 * source tree.
 */

/*
 * assertion:
 *
 *	aio_cancel() shall return AIO_NOTCANCELED if at least one of the
 *	requested operations cannot be canceled because it is in progress.
 *
 * method:
 *
 *	queue a lot of aio_write() to a given file descriptor
 *	then cancel all operation belonging to this file descriptor
 *	check result of each operation:
 *	- if aio_error() is EINPROGRESS and aio_cancel() is not AIO_NOTCANCELED
 *	  result is failed
 *	- if aio_error() is succes (0) and aio_cancel() is AIO_NOTCANCELED
 *	  result is susccess
 *	- otherwise result is unresolved
 *
 */

#define _XOPEN_SOURCE 600
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <aio.h>

#include "posixtest.h"

#define TNAME "aio_cancel/7-1.c"

#define BUF_NB		128
#define BUF_SIZE	1024

int main()
{
	char tmpfname[256];
	int fd;
	struct aiocb *aiocb[BUF_NB];
	int i;
	int in_progress;
	int gret;

#if _POSIX_ASYNCHRONOUS_IO != 200112L
	return PTS_UNSUPPORTED;
#endif

	snprintf(tmpfname, sizeof(tmpfname), "/tmp/pts_aio_cancel_7_1_%d", 
		  getpid());
	unlink(tmpfname);
	fd = open(tmpfname, O_CREAT | O_RDWR | O_EXCL,
		  S_IRUSR | S_IWUSR);
	if (fd == -1)
	{
		printf(TNAME " Error at open(): %s\n",
		       strerror(errno));
		return PTS_UNRESOLVED;
	}

	unlink(tmpfname);

	/* create AIO req */

	for (i = 0; i < BUF_NB; i++)
	{
		aiocb[i] = malloc(sizeof(struct aiocb));
		if (aiocb[i] == NULL)
		{
			printf(TNAME " Error at malloc(): %s\n",
		       		strerror(errno));
			return PTS_UNRESOLVED;
		}
		aiocb[i]->aio_fildes = fd;
		aiocb[i]->aio_buf = malloc(BUF_SIZE);
		if (aiocb[i]->aio_buf == NULL)
		{
			printf(TNAME " Error at malloc(): %s\n",
		       		strerror(errno));
			return PTS_UNRESOLVED;
		}
		aiocb[i]->aio_nbytes = BUF_SIZE;
		aiocb[i]->aio_offset = 0;
		aiocb[i]->aio_sigevent.sigev_notify = SIGEV_NONE;

		if (aio_write(aiocb[i]) == -1)
		{
			printf(TNAME " loop %d: Error at aio_write(): %s\n",
			       i, strerror(errno));
			return PTS_FAIL;
		}
	}

	/* try to cancel all
	 * we hope to have enough time to cancel at least one
	 */

	gret = aio_cancel(fd, NULL);
	if (gret == -1)
	{
		printf(TNAME " Error at aio_cancel(): %s\n",
		       strerror(errno));
		return PTS_FAIL;
	}

	close(fd);

	do {
		in_progress = 0;
		for (i = 0; i < BUF_NB; i++)
		{
			int ret;

			ret = (aio_error(aiocb[i]));

			if (ret == -1)
			{
				printf(TNAME " Error at aio_error(): %s\n",
		       			strerror(errno));
				return PTS_FAIL;
			}
			else if (ret == EINPROGRESS)
			{
				/* at this point, all operations should be:
				 *    canceled
				 * or in progress 
				 *    with aio_cancel() == AIO_NOTCANCELED
				 */

				if (gret != AIO_NOTCANCELED)
				{
					printf(TNAME " Error at aio_error(): %s\n", strerror(errno));
					return PTS_FAIL;
				}

				in_progress = 1;
			}
			else if (ret == 0)
			{
				/* we seek one not canceled and check why.
				 * (perhaps) it has not been canceled
				 * because it was in progress
				 * during the cancel operation
				 */

				if (gret == AIO_NOTCANCELED)
				{
					printf ("Test PASSED\n");
					return PTS_PASS;
				}
			}
		}
	} while (in_progress);

	return PTS_UNRESOLVED;
}