bsd/sys/resource.h

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  31 /*
  32  * Copyright (c) 1982, 1986, 1993
  33  *      The Regents of the University of California.  All rights reserved.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  * 1. Redistributions of source code must retain the above copyright
  39  *    notice, this list of conditions and the following disclaimer.
  40  * 2. Redistributions in binary form must reproduce the above copyright
  41  *    notice, this list of conditions and the following disclaimer in the
  42  *    documentation and/or other materials provided with the distribution.
  43  * 3. All advertising materials mentioning features or use of this software
  44  *    must display the following acknowledgement:
  45  *      This product includes software developed by the University of
  46  *      California, Berkeley and its contributors.
  47  * 4. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  *
  63  *      @(#)resource.h  8.2 (Berkeley) 1/4/94
  64  */
  65
  66 #ifndef _SYS_RESOURCE_H_
  67 #define _SYS_RESOURCE_H_
  68
  69 #include <sys/appleapiopts.h>
  70 #include <sys/cdefs.h>
  71 #include <sys/_types.h>
  72
  73
  74 /* [XSI] The timeval structure shall be defined as described in
  75  * <sys/time.h>
  76  *
  77  * NB: We use __darwin_time_t and __darwin_suseconds_t here to avoid
  78  * improperly exposing time_t and suseconds_t into the namespace.
  79  */
  80 #ifndef _TIMEVAL
  81 #define _TIMEVAL
  82 struct timeval {
  83         __darwin_time_t         tv_sec;         /* seconds */
  84         __darwin_suseconds_t    tv_usec;        /* and microseconds */
  85 };
  86 #endif
  87
  88 /* The id_t type shall be defined as described in <sys/types.h> */
  89 #ifndef _ID_T
  90 #define _ID_T
  91 typedef __darwin_id_t   id_t;           /* can hold pid_t, gid_t, or uid_t */
  92 #endif
  93
  94
  95 /*
  96  * Resource limit type (low 63 bits, excluding the sign bit)
  97  */
  98 typedef __int64_t       rlim_t;
  99
 100
 101 /*****
 102  * PRIORITY
 103  */
 104
 105 /*
 106  * Possible values of the first parameter to getpriority()/setpriority(),
 107  * used to indicate the type of the second parameter.
 108  */
 109 #define PRIO_PROCESS    0               /* Second argument is a PID */
 110 #define PRIO_PGRP       1               /* Second argument is a GID */
 111 #define PRIO_USER       2               /* Second argument is a UID */
 112
 113 #ifndef _POSIX_C_SOURCE
 114 /*
 115  * Range limitations for the value of the third parameter to setpriority().
 116  */
 117 #define PRIO_MIN        -20
 118 #define PRIO_MAX        20
 119 #endif  /* !_POSIX_C_SOURCE */
 120
 121
 122
 123 /*****
 124  * RESOURCE USAGE
 125  */
 126
 127 /*
 128  * Possible values of the first parameter to getrusage(), used to indicate
 129  * the scope of the information to be returned.
 130  */
 131 #define RUSAGE_SELF     0               /* Current process information */
 132 #define RUSAGE_CHILDREN -1              /* Current process' children */
 133
 134 /*
 135  * A structure representing an accounting of resource utilization.  The
 136  * address of an instance of this structure is the second parameter to
 137  * getrusage().
 138  *
 139  * Note: All values other than ru_utime and ru_stime are implementaiton
 140  *       defined and subject to change in a future release.  Their use
 141  *       is discouraged for standards compliant programs.
 142  */
 143 struct  rusage {
 144         struct timeval ru_utime;        /* user time used */
 145         struct timeval ru_stime;        /* system time used */
 146 #ifdef _POSIX_C_SOURCE
 147         long    ru_opaque[14];          /* implementation defined */
 148 #else   /* !_POSIX_C_SOURCE */
 149         /*
 150          * Informational aliases for source compatibility with programs
 151          * that need more information than that provided by standards,
 152          * and which do not mind being OS-dependent.
 153          */
 154         long    ru_maxrss;              /* max resident set size */
 155 #define ru_first        ru_ixrss        /* internal: ruadd() range start */
 156         long    ru_ixrss;               /* integral shared memory size */
 157         long    ru_idrss;               /* integral unshared data " */
 158         long    ru_isrss;               /* integral unshared stack " */
 159         long    ru_minflt;              /* page reclaims */
 160         long    ru_majflt;              /* page faults */
 161         long    ru_nswap;               /* swaps */
 162         long    ru_inblock;             /* block input operations */
 163         long    ru_oublock;             /* block output operations */
 164         long    ru_msgsnd;              /* messages sent */
 165         long    ru_msgrcv;              /* messages received */
 166         long    ru_nsignals;            /* signals received */
 167         long    ru_nvcsw;               /* voluntary context switches */
 168         long    ru_nivcsw;              /* involuntary " */
 169 #define ru_last         ru_nivcsw       /* internal: ruadd() range end */
 170 #endif  /* !_POSIX_C_SOURCE */
 171 };
 172
 173
 174
 175 // LP64todo - should this move?
 176 #ifdef KERNEL
 177 #include <machine/types.h>      /* user_time_t */
 178
 179 /* LP64 version of struct timeval.  time_t is a long and must grow when
 180  * we're dealing with a 64-bit process.
 181  * WARNING - keep in sync with struct timeval
 182  */
 183
 184 struct user_rusage_timeval {
 185         user_time_t             tv_sec;         /* seconds */
 186         __darwin_suseconds_t    tv_usec __attribute((aligned(8)));      /* and microseconds */
 187 };
 188 struct  user_rusage {
 189         struct user_rusage_timeval ru_utime;    /* user time used */
 190         struct user_rusage_timeval ru_stime;    /* system time used */
 191         user_long_t     ru_maxrss;              /* max resident set size */
 192         user_long_t     ru_ixrss;               /* integral shared memory size */
 193         user_long_t     ru_idrss;               /* integral unshared data " */
 194         user_long_t     ru_isrss;               /* integral unshared stack " */
 195         user_long_t     ru_minflt;              /* page reclaims */
 196         user_long_t     ru_majflt;              /* page faults */
 197         user_long_t     ru_nswap;               /* swaps */
 198         user_long_t     ru_inblock;             /* block input operations */
 199         user_long_t     ru_oublock;             /* block output operations */
 200         user_long_t     ru_msgsnd;              /* messages sent */
 201         user_long_t     ru_msgrcv;              /* messages received */
 202         user_long_t     ru_nsignals;    /* signals received */
 203         user_long_t     ru_nvcsw;               /* voluntary context switches */
 204         user_long_t     ru_nivcsw;              /* involuntary " */
 205 };
 206
 207 #endif // KERNEL
 208
 209
 210 /*****
 211  * RESOURCE LIMITS
 212  */
 213
 214 /*
 215  * Symbolic constants for resource limits; since all limits are representable
 216  * as a type rlim_t, we are permitted to define RLIM_SAVED_* in terms of
 217  * RLIM_INFINITY.
 218  */
 219 #define RLIM_INFINITY   (((__uint64_t)1 << 63) - 1)     /* no limit */
 220 #define RLIM_SAVED_MAX  RLIM_INFINITY   /* Unrepresentable hard limit */
 221 #define RLIM_SAVED_CUR  RLIM_INFINITY   /* Unrepresentable soft limit */
 222
 223 /*
 224  * Possible values of the first parameter to getrlimit()/setrlimit(), to
 225  * indicate for which resource the operation is being performed.
 226  */
 227 #define RLIMIT_CPU      0               /* cpu time per process, in ms */
 228 #define RLIMIT_FSIZE    1               /* file size */
 229 #define RLIMIT_DATA     2               /* data segment size */
 230 #define RLIMIT_STACK    3               /* stack size */
 231 #define RLIMIT_CORE     4               /* core file size */
 232 #define RLIMIT_AS       5               /* address space (resident set size) */
 233 #ifndef _POSIX_C_SOURCE
 234 #define RLIMIT_RSS      RLIMIT_AS       /* source compatibility alias */
 235 #define RLIMIT_MEMLOCK  6               /* locked-in-memory address space */
 236 #define RLIMIT_NPROC    7               /* number of processes */
 237 #endif  /* !_POSIX_C_SOURCE */
 238 #define RLIMIT_NOFILE   8               /* number of open files */
 239 #ifndef _POSIX_C_SOURCE
 240 #define RLIM_NLIMITS    9               /* total number of resource limits */
 241 #endif  /* !_POSIX_C_SOURCE */
 242
 243 /*
 244  * A structure representing a resource limit.  The address of an instance
 245  * of this structure is the second parameter to getrlimit()/setrlimit().
 246  */
 247 struct rlimit {
 248         rlim_t  rlim_cur;               /* current (soft) limit */
 249         rlim_t  rlim_max;               /* maximum value for rlim_cur */
 250 };
 251
 252
 253 #ifndef KERNEL
 254
 255 __BEGIN_DECLS
 256 int     getpriority(int, id_t);
 257 int     getrlimit(int, struct rlimit *);
 258 int     getrusage(int, struct rusage *);
 259 int     setpriority(int, id_t, int);
 260 int     setrlimit(int, const struct rlimit *);
 261 __END_DECLS
 262
 263 #endif  /* !KERNEL */
 264 #endif  /* !_SYS_RESOURCE_H_ */