| Current File : //usr/include/bits/resource.h |
/* Bit values & structures for resource limits. Linux version.
Copyright (C) 1994-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _SYS_RESOURCE_H
# error "Never use <bits/resource.h> directly; include <sys/resource.h> instead."
#endif
#include <bits/types.h>
/* Transmute defines to enumerations. The macro re-definitions are
necessary because some programs want to test for operating system
features with #ifdef RUSAGE_SELF. In ISO C the reflexive
definition is a no-op. */
/* Kinds of resource limit. */
enum __rlimit_resource
{
/* Per-process CPU limit, in seconds. */
RLIMIT_CPU = 0,
#define RLIMIT_CPU RLIMIT_CPU
/* Largest file that can be created, in bytes. */
RLIMIT_FSIZE = 1,
#define RLIMIT_FSIZE RLIMIT_FSIZE
/* Maximum size of data segment, in bytes. */
RLIMIT_DATA = 2,
#define RLIMIT_DATA RLIMIT_DATA
/* Maximum size of stack segment, in bytes. */
RLIMIT_STACK = 3,
#define RLIMIT_STACK RLIMIT_STACK
/* Largest core file that can be created, in bytes. */
RLIMIT_CORE = 4,
#define RLIMIT_CORE RLIMIT_CORE
/* Largest resident set size, in bytes.
This affects swapping; processes that are exceeding their
resident set size will be more likely to have physical memory
taken from them. */
__RLIMIT_RSS = 5,
#define RLIMIT_RSS __RLIMIT_RSS
/* Number of open files. */
RLIMIT_NOFILE = 7,
__RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same. */
#define RLIMIT_NOFILE RLIMIT_NOFILE
#define RLIMIT_OFILE __RLIMIT_OFILE
/* Address space limit. */
RLIMIT_AS = 9,
#define RLIMIT_AS RLIMIT_AS
/* Number of processes. */
__RLIMIT_NPROC = 6,
#define RLIMIT_NPROC __RLIMIT_NPROC
/* Locked-in-memory address space. */
__RLIMIT_MEMLOCK = 8,
#define RLIMIT_MEMLOCK __RLIMIT_MEMLOCK
/* Maximum number of file locks. */
__RLIMIT_LOCKS = 10,
#define RLIMIT_LOCKS __RLIMIT_LOCKS
/* Maximum number of pending signals. */
__RLIMIT_SIGPENDING = 11,
#define RLIMIT_SIGPENDING __RLIMIT_SIGPENDING
/* Maximum bytes in POSIX message queues. */
__RLIMIT_MSGQUEUE = 12,
#define RLIMIT_MSGQUEUE __RLIMIT_MSGQUEUE
/* Maximum nice priority allowed to raise to.
Nice levels 19 .. -20 correspond to 0 .. 39
values of this resource limit. */
__RLIMIT_NICE = 13,
#define RLIMIT_NICE __RLIMIT_NICE
/* Maximum realtime priority allowed for non-priviledged
processes. */
__RLIMIT_RTPRIO = 14,
#define RLIMIT_RTPRIO __RLIMIT_RTPRIO
/* Maximum CPU time in µs that a process scheduled under a real-time
scheduling policy may consume without making a blocking system
call before being forcibly descheduled. */
__RLIMIT_RTTIME = 15,
#define RLIMIT_RTTIME __RLIMIT_RTTIME
__RLIMIT_NLIMITS = 16,
__RLIM_NLIMITS = __RLIMIT_NLIMITS
#define RLIMIT_NLIMITS __RLIMIT_NLIMITS
#define RLIM_NLIMITS __RLIM_NLIMITS
};
/* Value to indicate that there is no limit. */
#ifndef __USE_FILE_OFFSET64
# define RLIM_INFINITY ((__rlim_t) -1)
#else
# define RLIM_INFINITY 0xffffffffffffffffuLL
#endif
#ifdef __USE_LARGEFILE64
# define RLIM64_INFINITY 0xffffffffffffffffuLL
#endif
/* We can represent all limits. */
#define RLIM_SAVED_MAX RLIM_INFINITY
#define RLIM_SAVED_CUR RLIM_INFINITY
/* Type for resource quantity measurement. */
#ifndef __USE_FILE_OFFSET64
typedef __rlim_t rlim_t;
#else
typedef __rlim64_t rlim_t;
#endif
#ifdef __USE_LARGEFILE64
typedef __rlim64_t rlim64_t;
#endif
struct rlimit
{
/* The current (soft) limit. */
rlim_t rlim_cur;
/* The hard limit. */
rlim_t rlim_max;
};
#ifdef __USE_LARGEFILE64
struct rlimit64
{
/* The current (soft) limit. */
rlim64_t rlim_cur;
/* The hard limit. */
rlim64_t rlim_max;
};
#endif
/* Whose usage statistics do you want? */
enum __rusage_who
{
/* The calling process. */
RUSAGE_SELF = 0,
#define RUSAGE_SELF RUSAGE_SELF
/* All of its terminated child processes. */
RUSAGE_CHILDREN = -1
#define RUSAGE_CHILDREN RUSAGE_CHILDREN
#ifdef __USE_GNU
,
/* The calling thread. */
RUSAGE_THREAD = 1
# define RUSAGE_THREAD RUSAGE_THREAD
/* Name for the same functionality on Solaris. */
# define RUSAGE_LWP RUSAGE_THREAD
#endif
};
#define __need_timeval
#include <bits/time.h> /* For `struct timeval'. */
/* Structure which says how much of each resource has been used. */
/* The purpose of all the unions is to have the kernel-compatible layout
while keeping the API type as 'long int', and among machines where
__syscall_slong_t is not 'long int', this only does the right thing
for little-endian ones, like x32. */
struct rusage
{
/* Total amount of user time used. */
struct timeval ru_utime;
/* Total amount of system time used. */
struct timeval ru_stime;
/* Maximum resident set size (in kilobytes). */
__extension__ union
{
long int ru_maxrss;
__syscall_slong_t __ru_maxrss_word;
};
/* Amount of sharing of text segment memory
with other processes (kilobyte-seconds). */
/* Maximum resident set size (in kilobytes). */
__extension__ union
{
long int ru_ixrss;
__syscall_slong_t __ru_ixrss_word;
};
/* Amount of data segment memory used (kilobyte-seconds). */
__extension__ union
{
long int ru_idrss;
__syscall_slong_t __ru_idrss_word;
};
/* Amount of stack memory used (kilobyte-seconds). */
__extension__ union
{
long int ru_isrss;
__syscall_slong_t __ru_isrss_word;
};
/* Number of soft page faults (i.e. those serviced by reclaiming
a page from the list of pages awaiting reallocation. */
__extension__ union
{
long int ru_minflt;
__syscall_slong_t __ru_minflt_word;
};
/* Number of hard page faults (i.e. those that required I/O). */
__extension__ union
{
long int ru_majflt;
__syscall_slong_t __ru_majflt_word;
};
/* Number of times a process was swapped out of physical memory. */
__extension__ union
{
long int ru_nswap;
__syscall_slong_t __ru_nswap_word;
};
/* Number of input operations via the file system. Note: This
and `ru_oublock' do not include operations with the cache. */
__extension__ union
{
long int ru_inblock;
__syscall_slong_t __ru_inblock_word;
};
/* Number of output operations via the file system. */
__extension__ union
{
long int ru_oublock;
__syscall_slong_t __ru_oublock_word;
};
/* Number of IPC messages sent. */
__extension__ union
{
long int ru_msgsnd;
__syscall_slong_t __ru_msgsnd_word;
};
/* Number of IPC messages received. */
__extension__ union
{
long int ru_msgrcv;
__syscall_slong_t __ru_msgrcv_word;
};
/* Number of signals delivered. */
__extension__ union
{
long int ru_nsignals;
__syscall_slong_t __ru_nsignals_word;
};
/* Number of voluntary context switches, i.e. because the process
gave up the process before it had to (usually to wait for some
resource to be available). */
__extension__ union
{
long int ru_nvcsw;
__syscall_slong_t __ru_nvcsw_word;
};
/* Number of involuntary context switches, i.e. a higher priority process
became runnable or the current process used up its time slice. */
__extension__ union
{
long int ru_nivcsw;
__syscall_slong_t __ru_nivcsw_word;
};
};
/* Priority limits. */
#define PRIO_MIN -20 /* Minimum priority a process can have. */
#define PRIO_MAX 20 /* Maximum priority a process can have. */
/* The type of the WHICH argument to `getpriority' and `setpriority',
indicating what flavor of entity the WHO argument specifies. */
enum __priority_which
{
PRIO_PROCESS = 0, /* WHO is a process ID. */
#define PRIO_PROCESS PRIO_PROCESS
PRIO_PGRP = 1, /* WHO is a process group ID. */
#define PRIO_PGRP PRIO_PGRP
PRIO_USER = 2 /* WHO is a user ID. */
#define PRIO_USER PRIO_USER
};
__BEGIN_DECLS
#ifdef __USE_GNU
/* Modify and return resource limits of a process atomically. */
# ifndef __USE_FILE_OFFSET64
extern int prlimit (__pid_t __pid, enum __rlimit_resource __resource,
const struct rlimit *__new_limit,
struct rlimit *__old_limit) __THROW;
# else
# ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (prlimit, (__pid_t __pid,
enum __rlimit_resource __resource,
const struct rlimit *__new_limit,
struct rlimit *__old_limit), prlimit64);
# else
# define prlimit prlimit64
# endif
# endif
# ifdef __USE_LARGEFILE64
extern int prlimit64 (__pid_t __pid, enum __rlimit_resource __resource,
const struct rlimit64 *__new_limit,
struct rlimit64 *__old_limit) __THROW;
# endif
#endif
__END_DECLS