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/*
* Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
* All rights reserved.
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the sendmail distribution.
*/
#include <sm/gen.h>
SM_RCSID("@(#)$Sendmail: t-shm.c,v 1.15 2001/08/27 23:00:05 gshapiro Exp $")
#include <stdio.h>
#if SM_CONF_SHM
# include <stdlib.h>
# include <unistd.h>
# include <sys/wait.h>
# include <sm/heap.h>
# include <sm/string.h>
# include <sm/test.h>
# include <sm/shm.h>
# define SHMSIZE 1024
# define SHM_MAX 6400000
# define T_SHMKEY 21
/*
** SHMINTER -- interactive testing of shared memory
**
** Parameters:
** owner -- create segment.
**
** Returns:
** 0 on success
** < 0 on failure.
*/
int shminter __P((bool));
int
shminter(owner)
bool owner;
{
int *shm, shmid;
int i, j, t;
shm = (int *) sm_shmstart(T_SHMKEY, SHMSIZE, 0, &shmid, owner);
if (shm == (int *) 0)
{
perror("shminit failed");
return -1;
}
while ((t = getchar()) != EOF)
{
switch (t)
{
case 'c':
*shm = 0;
break;
case 'i':
++*shm;
break;
case 'd':
--*shm;
break;
case 's':
sleep(1);
break;
case 'l':
t = *shm;
for (i = 0; i < SHM_MAX; i++)
{
j += i;
++*shm;
}
if (*shm != SHM_MAX + t)
fprintf(stderr, "error: %d != %d\n",
*shm, SHM_MAX + t);
break;
case 'v':
printf("shmval: %d\n", *shm);
break;
}
}
return sm_shmstop((void *) shm, shmid, owner);
}
/*
** SHMBIG -- testing of shared memory
**
** Parameters:
** owner -- create segment.
** size -- size of segment.
**
** Returns:
** 0 on success
** < 0 on failure.
*/
int shmbig __P((bool, int));
int
shmbig(owner, size)
bool owner;
int size;
{
int *shm, shmid;
int i;
shm = (int *) sm_shmstart(T_SHMKEY, size, 0, &shmid, owner);
if (shm == (int *) 0)
{
perror("shminit failed");
return -1;
}
for (i = 0; i < size / sizeof(int); i++)
shm[i] = i;
for (i = 0; i < size / sizeof(int); i++)
{
if (shm[i] != i)
{
fprintf(stderr, "failed at %d: %d", i, shm[i]);
}
}
return sm_shmstop((void *) shm, shmid, owner);
}
/*
** SHMTEST -- test of shared memory
**
** Parameters:
** owner -- create segment.
**
** Returns:
** 0 on success
** < 0 on failure.
*/
# define MAX_CNT 10
int
shmtest(owner)
int owner;
{
int *shm, shmid;
int cnt = 0;
shm = (int *) sm_shmstart(T_SHMKEY, SHMSIZE, 0, &shmid, owner);
if (shm == (int *) 0)
{
perror("shminit failed");
return -1;
}
if (owner)
{
int r;
*shm = 1;
while (*shm == 1 && cnt++ < MAX_CNT)
sleep(1);
SM_TEST(cnt <= MAX_CNT);
/* release and re-acquire the segment */
r = sm_shmstop((void *) shm, shmid, owner);
SM_TEST(r == 0);
shm = (int *) sm_shmstart(T_SHMKEY, SHMSIZE, 0, &shmid, owner);
SM_TEST(shm != (int *) 0);
}
else
{
while (*shm != 1 && cnt++ < MAX_CNT)
sleep(1);
SM_TEST(cnt <= MAX_CNT);
*shm = 2;
/* wait a momemt so the segment is still in use */
sleep(2);
}
return sm_shmstop((void *) shm, shmid, owner);
}
int
main(argc, argv)
int argc;
char *argv[];
{
bool interactive = false;
bool owner = false;
int big = -1;
int ch;
int r = 0;
int status;
extern char *optarg;
# define OPTIONS "b:io"
while ((ch = getopt(argc, argv, OPTIONS)) != -1)
{
switch ((char) ch)
{
case 'b':
big = atoi(optarg);
break;
case 'i':
interactive = true;
break;
case 'o':
owner = true;
break;
default:
break;
}
}
if (interactive)
r = shminter(owner);
else if (big > 0)
r = shmbig(true, big);
else
{
pid_t pid;
if ((pid = fork()) < 0)
{
perror("fork failed\n");
return -1;
}
sm_test_begin(argc, argv, "test shared memory");
if (pid == 0)
{
/* give the parent the chance to setup data */
sleep(1);
r = shmtest(false);
}
else
{
r = shmtest(true);
(void) wait(&status);
}
SM_TEST(r == 0);
return sm_test_end();
}
return r;
}
#else /* SM_CONF_SHM */
int
main(argc, argv)
int argc;
char *argv[];
{
printf("No support for shared memory configured on this machine\n");
return 0;
}
#endif /* SM_CONF_SHM */
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