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Diffstat (limited to 'bits/resource.h')
| -rw-r--r-- | bits/resource.h | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/bits/resource.h b/bits/resource.h new file mode 100644 index 0000000000..2c35c12a47 --- /dev/null +++ b/bits/resource.h @@ -0,0 +1,146 @@ +/* Bit values & structures for resource limits. 4.4 BSD/generic GNU version. + Copyright (C) 1994, 1996 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* These are the values for 4.4 BSD and GNU. Earlier BSD systems have a + subset of these kinds of resource limit. In systems where `getrlimit' + and `setrlimit' are not system calls, these are the values used by the C + library to emulate them. */ + +/* Kinds of resource limit. */ +enum __rlimit_resource + { + /* Per-process CPU limit, in seconds. */ + RLIMIT_CPU, +#define RLIMIT_CPU RLIMIT_CPU + /* Largest file that can be created, in bytes. */ + RLIMIT_FSIZE, +#define RLIMIT_FSIZE RLIMIT_FSIZE + /* Maximum size of data segment, in bytes. */ + RLIMIT_DATA, +#define RLIMIT_DATA RLIMIT_DATA + /* Maximum size of stack segment, in bytes. */ + RLIMIT_STACK, +#define RLIMIT_STACK RLIMIT_STACK + /* Largest core file that can be created, in bytes. */ + RLIMIT_CORE, +#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, +#define RLIMIT_RSS RLIMIT_RSS + /* Locked-in-memory address space. */ + RLIMIT_MEMLOCK, +#define RLIMIT_MEMLOCK RLIMIT_MEMLOCK + /* Number of processes. */ + RLIMIT_NPROC, +#define RLIMIT_NPROC RLIMIT_NPROC + /* Number of open files. */ + RLIMIT_OFILE, + RLIMIT_NOFILE = RLIMIT_OFILE, /* Another name for the same thing. */ +#define RLIMIT_OFILE RLIMIT_OFILE +#define RLIMIT_NOFILE RLIMIT_NOFILE + + RLIMIT_NLIMITS, /* Number of limit flavors. */ + RLIM_NLIMITS = RLIMIT_NLIMITS, /* Traditional name for same. */ + + RLIM_INFINITY = 0x7fffffff /* Value to indicate that there is no limit. */ +#define RLIM_INFINITY RLIM_INFINITY + }; + +struct rlimit + { + /* The current (soft) limit. */ + int rlim_cur; + /* The hard limit. */ + int rlim_max; + }; + +/* Whose usage statistics do you want? */ +enum __rusage_who +/* The macro 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. */ + { + /* 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 + }; + +#include <sys/time.h> /* For `struct timeval'. */ + +/* Structure which says how much of each resource has been used. */ +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). */ + long int ru_maxrss; + /* Amount of sharing of text segment memory + with other processes (kilobyte-seconds). */ + long int ru_ixrss; + /* Amount of data segment memory used (kilobyte-seconds). */ + long int ru_idrss; + /* Amount of stack memory used (kilobyte-seconds). */ + long int ru_isrss; + /* Number of soft page faults (i.e. those serviced by reclaiming + a page from the list of pages awaiting reallocation. */ + long int ru_minflt; + /* Number of hard page faults (i.e. those that required I/O). */ + long int ru_majflt; + /* Number of times a process was swapped out of physical memory. */ + long int ru_nswap; + /* Number of input operations via the file system. Note: This + and `ru_oublock' do not include operations with the cache. */ + long int ru_inblock; + /* Number of output operations via the file system. */ + long int ru_oublock; + /* Number of IPC messages sent. */ + long int ru_msgsnd; + /* Number of IPC messages received. */ + long int ru_msgrcv; + /* Number of signals delivered. */ + long int ru_nsignals; + /* 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). */ + long int ru_nvcsw; + /* Number of involuntary context switches, i.e. a higher priority process + became runnable or the current process used up its time slice. */ + long int ru_nivcsw; + }; + +/* 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. */ + PRIO_PGRP = 1, /* WHO is a process group ID. */ + PRIO_USER = 2 /* WHO is a user ID. */ + }; |