/*
 * 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:
 *
 *	The list array may contain NULL elements which shall be ignored.
 *
 * method:
 *
 *	- Open a file for writing
 *	- Create an lio list with NULL elements
 *	- submit list to lio_listio
 *	- Check that NULL elements are ignored
 *
 */

#define _XOPEN_SOURCE 600
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <aio.h>

#include "posixtest.h"

#define TNAME "lio_listio/4-1.c"

#define NUM_AIOCBS	10
#define BUF_SIZE	1024

int num_received	= 0;
int received_all	= 0;

void
sigrt1_handler(int signum, siginfo_t *info, void *context)
{
	num_received++;
}

void
sigrt2_handler(int signum, siginfo_t *info, void *context)
{
	received_all = 1;
}

int main()
{
	char tmpfname[256];
	int fd;

	struct aiocb *aiocbs[NUM_AIOCBS];
	char *bufs;
	struct sigaction action;
	struct sigevent event;
	int errors = 0;
	int ret;
	int err;
	int i;

#if _POSIX_ASYNCHRONOUS_IO != 200112L
	exit(PTS_UNSUPPORTED);
#endif

	snprintf(tmpfname, sizeof(tmpfname), "/tmp/pts_lio_listio_4_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));
		exit(PTS_UNRESOLVED);
	}

	unlink(tmpfname);

	bufs = (char *) malloc (NUM_AIOCBS*BUF_SIZE);

	if (bufs == NULL) {
		printf (TNAME " Error at malloc(): %s\n", strerror (errno));
		close (fd);
		exit(PTS_UNRESOLVED);
	}

	/* Put NULL elements in list */
	for (i=0; i<NUM_AIOCBS; i++)
		aiocbs[i] = NULL;

	/* Queue up a bunch of aio writes */
	for (i=1; i<NUM_AIOCBS-1; i++) {

		if (i == 3)
			continue;

		aiocbs[i] = (struct aiocb *)malloc(sizeof(struct aiocb));
		memset(aiocbs[i], 0, sizeof(struct aiocb));

		aiocbs[i]->aio_fildes = fd;
		aiocbs[i]->aio_offset = 0;
		aiocbs[i]->aio_buf = &bufs[i*BUF_SIZE];
		aiocbs[i]->aio_nbytes = BUF_SIZE;
		aiocbs[i]->aio_lio_opcode = LIO_WRITE;

		/* Use SIRTMIN+1 for individual completions */
		aiocbs[i]->aio_sigevent.sigev_notify = SIGEV_SIGNAL;
		aiocbs[i]->aio_sigevent.sigev_signo = SIGRTMIN+1;
		aiocbs[i]->aio_sigevent.sigev_value.sival_int = i;
	}

	/* Use SIGRTMIN+2 for list completion */
	event.sigev_notify = SIGEV_SIGNAL;
	event.sigev_signo = SIGRTMIN+2;
	event.sigev_value.sival_ptr = NULL;

	/* Setup handler for individual operation completion */
	action.sa_sigaction = sigrt1_handler;
	sigemptyset(&action.sa_mask);
	action.sa_flags = SA_SIGINFO|SA_RESTART;
	sigaction(SIGRTMIN+1, &action, NULL);

	/* Setup handler for list completion */
	action.sa_sigaction = sigrt2_handler;
	sigemptyset(&action.sa_mask);
	action.sa_flags = SA_SIGINFO|SA_RESTART;
	sigaction(SIGRTMIN+2, &action, NULL);

	/* Submit request list */
	ret = lio_listio(LIO_NOWAIT, aiocbs, NUM_AIOCBS, &event);

	if (ret) {
		printf(TNAME " Error at lio_listio() %d: %s\n", errno, strerror(errno));
		for (i=1; i<NUM_AIOCBS-1; i++) {
			if (i == 3)
				continue;
			free (aiocbs[i]);
		}
		free (bufs);
		close (fd);
		exit (PTS_FAIL);
	}

	/* Wait until list completion */
	while (received_all == 0)
		sleep (1);

	/* Check we only received NUM_AIOCBS-3 notifications */
	if (num_received != NUM_AIOCBS-3) {
		printf(TNAME " Error did not receive the right number of notifications\n");
		for (i=1; i<NUM_AIOCBS-1; i++) {
			if (i == 3)
				continue;
			free (aiocbs[i]);
		}
		free (bufs);
		close (fd);
		exit (PTS_FAIL);
	}



	/* Check return code and free things */
	for (i=1; i<NUM_AIOCBS-1; i++) {
		if (i == 3)
			continue;

	  	err = aio_error(aiocbs[i]);
		ret = aio_return(aiocbs[i]);

		if ((err != 0) && (ret != BUF_SIZE)) {
			printf(TNAME " req %d: error = %d - return = %d\n", i, err, ret);
			errors++;
		}

		free (aiocbs[i]);
	}

	free (bufs);

	close(fd);

	if (errors != 0)
		exit (PTS_FAIL);

	printf (TNAME " PASSED\n");

	return PTS_PASS;
}
