bsd/sys/resource.h

   1 /*
   2  * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_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 License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  29 /*
  30  * Copyright (c) 1982, 1986, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by the University of
  44  *      California, Berkeley and its contributors.
  45  * 4. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)resource.h  8.2 (Berkeley) 1/4/94
  62  */
  63
  64 #ifndef _SYS_RESOURCE_H_
  65 #define _SYS_RESOURCE_H_
  66
  67 #include <sys/appleapiopts.h>
  68 #include <sys/cdefs.h>
  69 #include <sys/_types.h>
  70
  71
  72 /* [XSI] The timeval structure shall be defined as described in
  73  * <sys/time.h>
  74  */
  75 #define __need_struct_timeval
  76 #ifdef KERNEL
  77 #define __need_struct_user32_timeval
  78 #define __need_struct_user64_timeval
  79 #endif
  80 #include <sys/_structs.h>
  81
  82 /* The id_t type shall be defined as described in <sys/types.h> */
  83 #ifndef _ID_T
  84 #define _ID_T
  85 typedef __darwin_id_t   id_t;           /* can hold pid_t, gid_t, or uid_t */
  86 #endif
  87
  88
  89 /*
  90  * Resource limit type (low 63 bits, excluding the sign bit)
  91  */
  92 typedef __uint64_t      rlim_t;
  93
  94
  95 /*****
  96  * PRIORITY
  97  */
  98
  99 /*
 100  * Possible values of the first parameter to getpriority()/setpriority(),
 101  * used to indicate the type of the second parameter.
 102  */
 103 #define PRIO_PROCESS    0               /* Second argument is a PID */
 104 #define PRIO_PGRP       1               /* Second argument is a GID */
 105 #define PRIO_USER       2               /* Second argument is a UID */
 106
 107 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 108 #define PRIO_DARWIN_THREAD      3               /* Second argument is always 0 (current thread) */
 109 #define PRIO_DARWIN_PROCESS     4               /* Second argument is a PID */
 110
 111 /*
 112  * Range limitations for the value of the third parameter to setpriority().
 113  */
 114 #define PRIO_MIN        -20
 115 #define PRIO_MAX        20
 116
 117 /*
 118  * use PRIO_DARWIN_BG to set the current thread into "background" state
 119  * which lowers CPU, disk IO, and networking priorites until thread terminates
 120  * or "background" state is revoked
 121  */
 122 #define PRIO_DARWIN_BG 0x1000
 123
 124 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 125
 126
 127
 128 /*****
 129  * RESOURCE USAGE
 130  */
 131
 132 /*
 133  * Possible values of the first parameter to getrusage(), used to indicate
 134  * the scope of the information to be returned.
 135  */
 136 #define RUSAGE_SELF     0               /* Current process information */
 137 #define RUSAGE_CHILDREN -1              /* Current process' children */
 138
 139 /*
 140  * A structure representing an accounting of resource utilization.  The
 141  * address of an instance of this structure is the second parameter to
 142  * getrusage().
 143  *
 144  * Note: All values other than ru_utime and ru_stime are implementaiton
 145  *       defined and subject to change in a future release.  Their use
 146  *       is discouraged for standards compliant programs.
 147  */
 148 struct  rusage {
 149         struct timeval ru_utime;        /* user time used (PL) */
 150         struct timeval ru_stime;        /* system time used (PL) */
 151 #if defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE)
 152         long    ru_opaque[14];          /* implementation defined */
 153 #else   /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 154         /*
 155          * Informational aliases for source compatibility with programs
 156          * that need more information than that provided by standards,
 157          * and which do not mind being OS-dependent.
 158          */
 159         long    ru_maxrss;              /* max resident set size (PL) */
 160 #define ru_first        ru_ixrss        /* internal: ruadd() range start */
 161         long    ru_ixrss;               /* integral shared memory size (NU) */
 162         long    ru_idrss;               /* integral unshared data (NU)  */
 163         long    ru_isrss;               /* integral unshared stack (NU) */
 164         long    ru_minflt;              /* page reclaims (NU) */
 165         long    ru_majflt;              /* page faults (NU) */
 166         long    ru_nswap;               /* swaps (NU) */
 167         long    ru_inblock;             /* block input operations (atomic) */
 168         long    ru_oublock;             /* block output operations (atomic) */
 169         long    ru_msgsnd;              /* messages sent (atomic) */
 170         long    ru_msgrcv;              /* messages received (atomic) */
 171         long    ru_nsignals;            /* signals received (atomic) */
 172         long    ru_nvcsw;               /* voluntary context switches (atomic) */
 173         long    ru_nivcsw;              /* involuntary " */
 174 #define ru_last         ru_nivcsw       /* internal: ruadd() range end */
 175 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 176 };
 177
 178
 179 #ifdef KERNEL
 180
 181 struct  user64_rusage {
 182         struct user64_timeval ru_utime; /* user time used */
 183         struct user64_timeval ru_stime; /* system time used */
 184         user64_long_t   ru_maxrss;              /* max resident set size */
 185         user64_long_t   ru_ixrss;               /* integral shared memory size */
 186         user64_long_t   ru_idrss;               /* integral unshared data " */
 187         user64_long_t   ru_isrss;               /* integral unshared stack " */
 188         user64_long_t   ru_minflt;              /* page reclaims */
 189         user64_long_t   ru_majflt;              /* page faults */
 190         user64_long_t   ru_nswap;               /* swaps */
 191         user64_long_t   ru_inblock;             /* block input operations */
 192         user64_long_t   ru_oublock;             /* block output operations */
 193         user64_long_t   ru_msgsnd;              /* messages sent */
 194         user64_long_t   ru_msgrcv;              /* messages received */
 195         user64_long_t   ru_nsignals;    /* signals received */
 196         user64_long_t   ru_nvcsw;               /* voluntary context switches */
 197         user64_long_t   ru_nivcsw;              /* involuntary " */
 198 };
 199
 200 struct  user32_rusage {
 201         struct user32_timeval ru_utime; /* user time used */
 202         struct user32_timeval ru_stime; /* system time used */
 203         user32_long_t   ru_maxrss;              /* max resident set size */
 204         user32_long_t   ru_ixrss;               /* integral shared memory size */
 205         user32_long_t   ru_idrss;               /* integral unshared data " */
 206         user32_long_t   ru_isrss;               /* integral unshared stack " */
 207         user32_long_t   ru_minflt;              /* page reclaims */
 208         user32_long_t   ru_majflt;              /* page faults */
 209         user32_long_t   ru_nswap;               /* swaps */
 210         user32_long_t   ru_inblock;             /* block input operations */
 211         user32_long_t   ru_oublock;             /* block output operations */
 212         user32_long_t   ru_msgsnd;              /* messages sent */
 213         user32_long_t   ru_msgrcv;              /* messages received */
 214         user32_long_t   ru_nsignals;    /* signals received */
 215         user32_long_t   ru_nvcsw;               /* voluntary context switches */
 216         user32_long_t   ru_nivcsw;              /* involuntary " */
 217 };
 218
 219 #endif /* KERNEL */
 220
 221
 222 /*****
 223  * RESOURCE LIMITS
 224  */
 225
 226 /*
 227  * Symbolic constants for resource limits; since all limits are representable
 228  * as a type rlim_t, we are permitted to define RLIM_SAVED_* in terms of
 229  * RLIM_INFINITY.
 230  */
 231 #define RLIM_INFINITY   (((__uint64_t)1 << 63) - 1)     /* no limit */
 232 #define RLIM_SAVED_MAX  RLIM_INFINITY   /* Unrepresentable hard limit */
 233 #define RLIM_SAVED_CUR  RLIM_INFINITY   /* Unrepresentable soft limit */
 234
 235 /*
 236  * Possible values of the first parameter to getrlimit()/setrlimit(), to
 237  * indicate for which resource the operation is being performed.
 238  */
 239 #define RLIMIT_CPU      0               /* cpu time per process */
 240 #define RLIMIT_FSIZE    1               /* file size */
 241 #define RLIMIT_DATA     2               /* data segment size */
 242 #define RLIMIT_STACK    3               /* stack size */
 243 #define RLIMIT_CORE     4               /* core file size */
 244 #define RLIMIT_AS       5               /* address space (resident set size) */
 245 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 246 #define RLIMIT_RSS      RLIMIT_AS       /* source compatibility alias */
 247 #define RLIMIT_MEMLOCK  6               /* locked-in-memory address space */
 248 #define RLIMIT_NPROC    7               /* number of processes */
 249 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 250 #define RLIMIT_NOFILE   8               /* number of open files */
 251 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 252 #define RLIM_NLIMITS    9               /* total number of resource limits */
 253 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 254 #define _RLIMIT_POSIX_FLAG      0x1000  /* Set bit for strict POSIX */
 255
 256 /*
 257  * A structure representing a resource limit.  The address of an instance
 258  * of this structure is the second parameter to getrlimit()/setrlimit().
 259  */
 260 struct rlimit {
 261         rlim_t  rlim_cur;               /* current (soft) limit */
 262         rlim_t  rlim_max;               /* maximum value for rlim_cur */
 263 };
 264
 265 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 266 /* I/O type */
 267 #define IOPOL_TYPE_DISK 0
 268
 269 /* scope */
 270 #define IOPOL_SCOPE_PROCESS   0
 271 #define IOPOL_SCOPE_THREAD    1
 272
 273 /* I/O Priority */
 274 #define IOPOL_DEFAULT   0
 275 #define IOPOL_NORMAL    1
 276 #define IOPOL_PASSIVE   2
 277 #define IOPOL_THROTTLE  3
 278
 279 #ifdef PRIVATE
 280 /*
 281  * Structures for use in communicating via iopolicysys() between Lic and the
 282  * kernel.  Not to be used by uesr programs directly.
 283  */
 284
 285 /*
 286  * the command to iopolicysys()
 287  */
 288 #define IOPOL_CMD_GET           0x00000001      /* Get I/O policy */
 289 #define IOPOL_CMD_SET           0x00000002      /* Set I/O policy */
 290
 291 /*
 292  * Second parameter to iopolicysys()
 293  */
 294 struct _iopol_param_t {
 295         int iop_scope;  /* current process or a thread */
 296         int iop_iotype;
 297         int iop_policy;
 298 };
 299
 300 #endif  /* PRIVATE */
 301 #endif /* !_POSIX_C_SOURCE || _DARWIN_C_SOURCE */
 302
 303 #ifndef KERNEL
 304
 305 __BEGIN_DECLS
 306 int     getpriority(int, id_t);
 307 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 308 int     getiopolicy_np(int, int);
 309 #endif /* !_POSIX_C_SOURCE || _DARWIN_C_SOURCE */
 310 int     getrlimit(int, struct rlimit *) __DARWIN_ALIAS(getrlimit);
 311 int     getrusage(int, struct rusage *);
 312 int     setpriority(int, id_t, int);
 313 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 314 int     setiopolicy_np(int, int, int);
 315 #endif /* !_POSIX_C_SOURCE || _DARWIN_C_SOURCE */
 316 int     setrlimit(int, const struct rlimit *) __DARWIN_ALIAS(setrlimit);
 317 __END_DECLS
 318
 319 #endif  /* !KERNEL */
 320 #endif  /* !_SYS_RESOURCE_H_ */