diff options
Diffstat (limited to 'src/pmdas/linux/shm_limits.c')
| -rw-r--r-- | src/pmdas/linux/shm_limits.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/pmdas/linux/shm_limits.c b/src/pmdas/linux/shm_limits.c new file mode 100644 index 0000000..e1c80f0 --- /dev/null +++ b/src/pmdas/linux/shm_limits.c @@ -0,0 +1,43 @@ +/* + * Copyright (c) International Business Machines Corp., 2002 + * This code contributed by Mike Mason <mmlnx@us.ibm.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +#define __USE_GNU 1 /* required for IPC_INFO define */ +#include <sys/ipc.h> +#include <sys/shm.h> + +#include "pmapi.h" +#include "shm_limits.h" + +int +refresh_shm_limits(shm_limits_t *shm_limits) +{ + static int started; + static struct shminfo shminfo; + + if (!started) { + started = 1; + memset(shm_limits, 0, sizeof(shm_limits_t)); + } + + if (shmctl(0, IPC_INFO, (struct shmid_ds *) &shminfo) < 0) + return -oserror(); + + shm_limits->shmmax = shminfo.shmmax; + shm_limits->shmmin = shminfo.shmmin; + shm_limits->shmmni = shminfo.shmmni; + shm_limits->shmseg = shminfo.shmseg; + shm_limits->shmall = shminfo.shmall; + return 0; +} |