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 #if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
  72 #include <stdint.h>
  73 #endif /* __DARWIN_C_LEVEL >= __DARWIN_C_FULL */
  74
  75 #ifndef KERNEL
  76 #include <Availability.h>
  77 #endif
  78
  79 /* [XSI] The timeval structure shall be defined as described in
  80  * <sys/time.h>
  81  */
  82 #include <sys/_types/_timeval.h>
  83 #ifdef KERNEL
  84 #include <sys/_types/_user32_timeval.h>
  85 #include <sys/_types/_user64_timeval.h>
  86 #endif
  87
  88 /* The id_t type shall be defined as described in <sys/types.h> */
  89 #include <sys/_types/_id_t.h>
  90
  91
  92 /*
  93  * Resource limit type (low 63 bits, excluding the sign bit)
  94  */
  95 typedef __uint64_t      rlim_t;
  96
  97
  98 /*****
  99  * PRIORITY
 100  */
 101
 102 /*
 103  * Possible values of the first parameter to getpriority()/setpriority(),
 104  * used to indicate the type of the second parameter.
 105  */
 106 #define PRIO_PROCESS    0               /* Second argument is a PID */
 107 #define PRIO_PGRP       1               /* Second argument is a GID */
 108 #define PRIO_USER       2               /* Second argument is a UID */
 109
 110 #if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
 111 #define PRIO_DARWIN_THREAD      3               /* Second argument is always 0 (current thread) */
 112 #define PRIO_DARWIN_PROCESS     4               /* Second argument is a PID */
 113
 114 #ifdef PRIVATE
 115
 116 #define PRIO_DARWIN_GPU         5               /* Second argument is a PID */
 117
 118 #define PRIO_DARWIN_GPU_ALLOW   0x1
 119 #define PRIO_DARWIN_GPU_DENY    0x2
 120
 121 #define PRIO_DARWIN_ROLE        6               /* Second argument is a PID */
 122
 123 #define PRIO_DARWIN_ROLE_DEFAULT        0x0     /* Reset to default state */
 124 #define PRIO_DARWIN_ROLE_UI_FOCAL       0x1     /* On  screen,     focal UI */
 125 #define PRIO_DARWIN_ROLE_UI             0x2     /* On  screen UI,  focal unknown */
 126 #define PRIO_DARWIN_ROLE_NON_UI         0x3     /* Off screen, non-focal UI */
 127 #define PRIO_DARWIN_ROLE_UI_NON_FOCAL   0x4     /* On  screen, non-focal UI */
 128 #define PRIO_DARWIN_ROLE_TAL_LAUNCH     0x5     /* Throttled-launch (for OS X TAL resume) */
 129
 130 #endif /* PRIVATE */
 131
 132 /*
 133  * Range limitations for the value of the third parameter to setpriority().
 134  */
 135 #define PRIO_MIN        -20
 136 #define PRIO_MAX        20
 137
 138 /*
 139  * use PRIO_DARWIN_BG to set the current thread into "background" state
 140  * which lowers CPU, disk IO, and networking priorites until thread terminates
 141  * or "background" state is revoked
 142  */
 143 #define PRIO_DARWIN_BG 0x1000
 144
 145 /*
 146  * use PRIO_DARWIN_NONUI to restrict a process's ability to make calls to
 147  * the GPU. (deprecated)
 148  */
 149 #define PRIO_DARWIN_NONUI 0x1001
 150
 151 #endif  /* __DARWIN_C_LEVEL >= __DARWIN_C_FULL */
 152
 153
 154
 155 /*****
 156  * RESOURCE USAGE
 157  */
 158
 159 /*
 160  * Possible values of the first parameter to getrusage(), used to indicate
 161  * the scope of the information to be returned.
 162  */
 163 #define RUSAGE_SELF     0               /* Current process information */
 164 #define RUSAGE_CHILDREN -1              /* Current process' children */
 165
 166 /*
 167  * A structure representing an accounting of resource utilization.  The
 168  * address of an instance of this structure is the second parameter to
 169  * getrusage().
 170  *
 171  * Note: All values other than ru_utime and ru_stime are implementaiton
 172  *       defined and subject to change in a future release.  Their use
 173  *       is discouraged for standards compliant programs.
 174  */
 175 struct  rusage {
 176         struct timeval ru_utime;        /* user time used (PL) */
 177         struct timeval ru_stime;        /* system time used (PL) */
 178 #if __DARWIN_C_LEVEL < __DARWIN_C_FULL
 179         long    ru_opaque[14];          /* implementation defined */
 180 #else
 181         /*
 182          * Informational aliases for source compatibility with programs
 183          * that need more information than that provided by standards,
 184          * and which do not mind being OS-dependent.
 185          */
 186         long    ru_maxrss;              /* max resident set size (PL) */
 187 #define ru_first        ru_ixrss        /* internal: ruadd() range start */
 188         long    ru_ixrss;               /* integral shared memory size (NU) */
 189         long    ru_idrss;               /* integral unshared data (NU)  */
 190         long    ru_isrss;               /* integral unshared stack (NU) */
 191         long    ru_minflt;              /* page reclaims (NU) */
 192         long    ru_majflt;              /* page faults (NU) */
 193         long    ru_nswap;               /* swaps (NU) */
 194         long    ru_inblock;             /* block input operations (atomic) */
 195         long    ru_oublock;             /* block output operations (atomic) */
 196         long    ru_msgsnd;              /* messages sent (atomic) */
 197         long    ru_msgrcv;              /* messages received (atomic) */
 198         long    ru_nsignals;            /* signals received (atomic) */
 199         long    ru_nvcsw;               /* voluntary context switches (atomic) */
 200         long    ru_nivcsw;              /* involuntary " */
 201 #define ru_last         ru_nivcsw       /* internal: ruadd() range end */
 202 #endif  /* __DARWIN_C_LEVEL >= __DARWIN_C_FULL */
 203 };
 204
 205 #if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
 206 /*
 207  * Flavors for proc_pid_rusage().
 208  */
 209 #define RUSAGE_INFO_V0  0
 210 #define RUSAGE_INFO_V1  1
 211 #define RUSAGE_INFO_V2  2
 212 #define RUSAGE_INFO_V3  3
 213 #define RUSAGE_INFO_V4  4
 214 #define RUSAGE_INFO_CURRENT     RUSAGE_INFO_V4
 215
 216 typedef void *rusage_info_t;
 217
 218 struct rusage_info_v0 {
 219         uint8_t  ri_uuid[16];
 220         uint64_t ri_user_time;
 221         uint64_t ri_system_time;
 222         uint64_t ri_pkg_idle_wkups;
 223         uint64_t ri_interrupt_wkups;
 224         uint64_t ri_pageins;
 225         uint64_t ri_wired_size;
 226         uint64_t ri_resident_size;
 227         uint64_t ri_phys_footprint;
 228         uint64_t ri_proc_start_abstime;
 229         uint64_t ri_proc_exit_abstime;
 230 };
 231
 232 struct rusage_info_v1 {
 233         uint8_t  ri_uuid[16];
 234         uint64_t ri_user_time;
 235         uint64_t ri_system_time;
 236         uint64_t ri_pkg_idle_wkups;
 237         uint64_t ri_interrupt_wkups;
 238         uint64_t ri_pageins;
 239         uint64_t ri_wired_size;
 240         uint64_t ri_resident_size;
 241         uint64_t ri_phys_footprint;
 242         uint64_t ri_proc_start_abstime;
 243         uint64_t ri_proc_exit_abstime;
 244         uint64_t ri_child_user_time;
 245         uint64_t ri_child_system_time;
 246         uint64_t ri_child_pkg_idle_wkups;
 247         uint64_t ri_child_interrupt_wkups;
 248         uint64_t ri_child_pageins;
 249         uint64_t ri_child_elapsed_abstime;
 250 };
 251
 252 struct rusage_info_v2 {
 253         uint8_t  ri_uuid[16];
 254         uint64_t ri_user_time;
 255         uint64_t ri_system_time;
 256         uint64_t ri_pkg_idle_wkups;
 257         uint64_t ri_interrupt_wkups;
 258         uint64_t ri_pageins;
 259         uint64_t ri_wired_size;
 260         uint64_t ri_resident_size;
 261         uint64_t ri_phys_footprint;
 262         uint64_t ri_proc_start_abstime;
 263         uint64_t ri_proc_exit_abstime;
 264         uint64_t ri_child_user_time;
 265         uint64_t ri_child_system_time;
 266         uint64_t ri_child_pkg_idle_wkups;
 267         uint64_t ri_child_interrupt_wkups;
 268         uint64_t ri_child_pageins;
 269         uint64_t ri_child_elapsed_abstime;
 270         uint64_t ri_diskio_bytesread;
 271         uint64_t ri_diskio_byteswritten;
 272 };
 273
 274 struct rusage_info_v3 {
 275         uint8_t  ri_uuid[16];
 276         uint64_t ri_user_time;
 277         uint64_t ri_system_time;
 278         uint64_t ri_pkg_idle_wkups;
 279         uint64_t ri_interrupt_wkups;
 280         uint64_t ri_pageins;
 281         uint64_t ri_wired_size;
 282         uint64_t ri_resident_size;
 283         uint64_t ri_phys_footprint;
 284         uint64_t ri_proc_start_abstime;
 285         uint64_t ri_proc_exit_abstime;
 286         uint64_t ri_child_user_time;
 287         uint64_t ri_child_system_time;
 288         uint64_t ri_child_pkg_idle_wkups;
 289         uint64_t ri_child_interrupt_wkups;
 290         uint64_t ri_child_pageins;
 291         uint64_t ri_child_elapsed_abstime;
 292         uint64_t ri_diskio_bytesread;
 293         uint64_t ri_diskio_byteswritten;
 294         uint64_t ri_cpu_time_qos_default;
 295         uint64_t ri_cpu_time_qos_maintenance;
 296         uint64_t ri_cpu_time_qos_background;
 297         uint64_t ri_cpu_time_qos_utility;
 298         uint64_t ri_cpu_time_qos_legacy;
 299         uint64_t ri_cpu_time_qos_user_initiated;
 300         uint64_t ri_cpu_time_qos_user_interactive;
 301         uint64_t ri_billed_system_time;
 302         uint64_t ri_serviced_system_time;
 303 };
 304
 305 struct rusage_info_v4 {
 306         uint8_t  ri_uuid[16];
 307         uint64_t ri_user_time;
 308         uint64_t ri_system_time;
 309         uint64_t ri_pkg_idle_wkups;
 310         uint64_t ri_interrupt_wkups;
 311         uint64_t ri_pageins;
 312         uint64_t ri_wired_size;
 313         uint64_t ri_resident_size;
 314         uint64_t ri_phys_footprint;
 315         uint64_t ri_proc_start_abstime;
 316         uint64_t ri_proc_exit_abstime;
 317         uint64_t ri_child_user_time;
 318         uint64_t ri_child_system_time;
 319         uint64_t ri_child_pkg_idle_wkups;
 320         uint64_t ri_child_interrupt_wkups;
 321         uint64_t ri_child_pageins;
 322         uint64_t ri_child_elapsed_abstime;
 323         uint64_t ri_diskio_bytesread;
 324         uint64_t ri_diskio_byteswritten;
 325         uint64_t ri_cpu_time_qos_default;
 326         uint64_t ri_cpu_time_qos_maintenance;
 327         uint64_t ri_cpu_time_qos_background;
 328         uint64_t ri_cpu_time_qos_utility;
 329         uint64_t ri_cpu_time_qos_legacy;
 330         uint64_t ri_cpu_time_qos_user_initiated;
 331         uint64_t ri_cpu_time_qos_user_interactive;
 332         uint64_t ri_billed_system_time;
 333         uint64_t ri_serviced_system_time;
 334         uint64_t ri_logical_writes;
 335         uint64_t ri_lifetime_max_phys_footprint;
 336         uint64_t ri_instructions;
 337         uint64_t ri_cycles;
 338         uint64_t ri_billed_energy;
 339         uint64_t ri_serviced_energy;
 340         // We're reserving 2 counters for future extension
 341         uint64_t ri_unused[2];
 342 };
 343
 344 typedef struct rusage_info_v4 rusage_info_current;
 345
 346 #endif /* __DARWIN_C_LEVEL >= __DARWIN_C_FULL */
 347
 348 #ifdef KERNEL
 349
 350 struct rusage_superset {
 351         struct rusage                   ru;
 352         rusage_info_current     ri;
 353 };
 354
 355 struct rusage_info_child {
 356         uint64_t ri_child_user_time;
 357         uint64_t ri_child_system_time;
 358         uint64_t ri_child_pkg_idle_wkups;
 359         uint64_t ri_child_interrupt_wkups;
 360         uint64_t ri_child_pageins;
 361         uint64_t ri_child_elapsed_abstime;
 362 };
 363
 364 struct  user64_rusage {
 365         struct user64_timeval ru_utime; /* user time used */
 366         struct user64_timeval ru_stime; /* system time used */
 367         user64_long_t   ru_maxrss;              /* max resident set size */
 368         user64_long_t   ru_ixrss;               /* integral shared memory size */
 369         user64_long_t   ru_idrss;               /* integral unshared data " */
 370         user64_long_t   ru_isrss;               /* integral unshared stack " */
 371         user64_long_t   ru_minflt;              /* page reclaims */
 372         user64_long_t   ru_majflt;              /* page faults */
 373         user64_long_t   ru_nswap;               /* swaps */
 374         user64_long_t   ru_inblock;             /* block input operations */
 375         user64_long_t   ru_oublock;             /* block output operations */
 376         user64_long_t   ru_msgsnd;              /* messages sent */
 377         user64_long_t   ru_msgrcv;              /* messages received */
 378         user64_long_t   ru_nsignals;    /* signals received */
 379         user64_long_t   ru_nvcsw;               /* voluntary context switches */
 380         user64_long_t   ru_nivcsw;              /* involuntary " */
 381 };
 382
 383 struct  user32_rusage {
 384         struct user32_timeval ru_utime; /* user time used */
 385         struct user32_timeval ru_stime; /* system time used */
 386         user32_long_t   ru_maxrss;              /* max resident set size */
 387         user32_long_t   ru_ixrss;               /* integral shared memory size */
 388         user32_long_t   ru_idrss;               /* integral unshared data " */
 389         user32_long_t   ru_isrss;               /* integral unshared stack " */
 390         user32_long_t   ru_minflt;              /* page reclaims */
 391         user32_long_t   ru_majflt;              /* page faults */
 392         user32_long_t   ru_nswap;               /* swaps */
 393         user32_long_t   ru_inblock;             /* block input operations */
 394         user32_long_t   ru_oublock;             /* block output operations */
 395         user32_long_t   ru_msgsnd;              /* messages sent */
 396         user32_long_t   ru_msgrcv;              /* messages received */
 397         user32_long_t   ru_nsignals;    /* signals received */
 398         user32_long_t   ru_nvcsw;               /* voluntary context switches */
 399         user32_long_t   ru_nivcsw;              /* involuntary " */
 400 };
 401
 402 #endif /* KERNEL */
 403
 404
 405 /*****
 406  * RESOURCE LIMITS
 407  */
 408
 409 /*
 410  * Symbolic constants for resource limits; since all limits are representable
 411  * as a type rlim_t, we are permitted to define RLIM_SAVED_* in terms of
 412  * RLIM_INFINITY.
 413  */
 414 #define RLIM_INFINITY   (((__uint64_t)1 << 63) - 1)     /* no limit */
 415 #define RLIM_SAVED_MAX  RLIM_INFINITY   /* Unrepresentable hard limit */
 416 #define RLIM_SAVED_CUR  RLIM_INFINITY   /* Unrepresentable soft limit */
 417
 418 /*
 419  * Possible values of the first parameter to getrlimit()/setrlimit(), to
 420  * indicate for which resource the operation is being performed.
 421  */
 422 #define RLIMIT_CPU      0               /* cpu time per process */
 423 #define RLIMIT_FSIZE    1               /* file size */
 424 #define RLIMIT_DATA     2               /* data segment size */
 425 #define RLIMIT_STACK    3               /* stack size */
 426 #define RLIMIT_CORE     4               /* core file size */
 427 #define RLIMIT_AS       5               /* address space (resident set size) */
 428 #if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
 429 #define RLIMIT_RSS      RLIMIT_AS       /* source compatibility alias */
 430 #define RLIMIT_MEMLOCK  6               /* locked-in-memory address space */
 431 #define RLIMIT_NPROC    7               /* number of processes */
 432 #endif  /* __DARWIN_C_LEVEL >= __DARWIN_C_FULL */
 433 #define RLIMIT_NOFILE   8               /* number of open files */
 434 #if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
 435 #define RLIM_NLIMITS    9               /* total number of resource limits */
 436 #endif  /* __DARWIN_C_LEVEL >= __DARWIN_C_FULL */
 437 #define _RLIMIT_POSIX_FLAG      0x1000  /* Set bit for strict POSIX */
 438
 439 /*
 440  * A structure representing a resource limit.  The address of an instance
 441  * of this structure is the second parameter to getrlimit()/setrlimit().
 442  */
 443 struct rlimit {
 444         rlim_t  rlim_cur;               /* current (soft) limit */
 445         rlim_t  rlim_max;               /* maximum value for rlim_cur */
 446 };
 447
 448 #if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
 449 /*
 450  * proc_rlimit_control()
 451  *
 452  * Resource limit flavors
 453  */
 454 #define RLIMIT_WAKEUPS_MONITOR          0x1 /* Configure the wakeups monitor. */
 455 #define RLIMIT_CPU_USAGE_MONITOR        0x2 /* Configure the CPU usage monitor. */
 456 #define RLIMIT_THREAD_CPULIMITS         0x3 /* Configure a blocking, per-thread, CPU limits. */
 457
 458 /*
 459  * Flags for wakeups monitor control.
 460  */
 461 #define WAKEMON_ENABLE                  0x01
 462 #define WAKEMON_DISABLE                 0x02
 463 #define WAKEMON_GET_PARAMS              0x04
 464 #define WAKEMON_SET_DEFAULTS            0x08
 465 #define WAKEMON_MAKE_FATAL              0x10 /* Configure the task so that violations are fatal. */
 466 /*
 467  * Flags for CPU usage monitor control.
 468  */
 469 #define CPUMON_MAKE_FATAL               0x1000
 470
 471 struct proc_rlimit_control_wakeupmon {
 472         uint32_t wm_flags;
 473         int32_t wm_rate;
 474 };
 475
 476 #if PRIVATE
 477 /*
 478  * Flags for I/O monitor control.
 479  */
 480 #define IOMON_ENABLE                    0x01
 481 #define IOMON_DISABLE                   0x02
 482
 483 #endif /* PRIVATE */
 484
 485
 486 /* I/O type */
 487 #define IOPOL_TYPE_DISK 0
 488 #if PRIVATE
 489 #define IOPOL_TYPE_VFS_HFS_CASE_SENSITIVITY 1
 490 #endif
 491
 492 /* scope */
 493 #define IOPOL_SCOPE_PROCESS   0
 494 #define IOPOL_SCOPE_THREAD    1
 495 #define IOPOL_SCOPE_DARWIN_BG 2
 496
 497 /* I/O Priority */
 498 #define IOPOL_DEFAULT           0
 499 #define IOPOL_IMPORTANT         1
 500 #define IOPOL_PASSIVE           2
 501 #define IOPOL_THROTTLE          3
 502 #define IOPOL_UTILITY           4
 503 #define IOPOL_STANDARD          5
 504
 505 /* compatibility with older names */
 506 #define IOPOL_APPLICATION       IOPOL_STANDARD
 507 #define IOPOL_NORMAL            IOPOL_IMPORTANT
 508
 509 #if PRIVATE
 510 #define IOPOL_VFS_HFS_CASE_SENSITIVITY_DEFAULT  0
 511 #define IOPOL_VFS_HFS_CASE_SENSITIVITY_FORCE_CASE_SENSITIVE     1
 512 #endif
 513
 514 #ifdef PRIVATE
 515 /*
 516  * Structures for use in communicating via iopolicysys() between Libc and the
 517  * kernel.  Not to be used by user programs directly.
 518  */
 519
 520 /*
 521  * the command to iopolicysys()
 522  */
 523 #define IOPOL_CMD_GET           0x00000001      /* Get I/O policy */
 524 #define IOPOL_CMD_SET           0x00000002      /* Set I/O policy */
 525
 526 /*
 527  * Second parameter to iopolicysys()
 528  */
 529 struct _iopol_param_t {
 530         int iop_scope;  /* current process or a thread */
 531         int iop_iotype;
 532         int iop_policy;
 533 };
 534
 535 #endif  /* PRIVATE */
 536 #endif /* __DARWIN_C_LEVEL >= __DARWIN_C_FULL */
 537
 538 #ifndef KERNEL
 539
 540 __BEGIN_DECLS
 541 int     getpriority(int, id_t);
 542 #if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
 543 int     getiopolicy_np(int, int) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
 544 #endif /* __DARWIN_C_LEVEL >= __DARWIN_C_FULL */
 545 int     getrlimit(int, struct rlimit *) __DARWIN_ALIAS(getrlimit);
 546 int     getrusage(int, struct rusage *);
 547 int     setpriority(int, id_t, int);
 548 #if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
 549 int     setiopolicy_np(int, int, int) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
 550 #endif /* __DARWIN_C_LEVEL >= __DARWIN_C_FULL */
 551 int     setrlimit(int, const struct rlimit *) __DARWIN_ALIAS(setrlimit);
 552 __END_DECLS
 553
 554 #endif  /* !KERNEL */
 555 #endif  /* !_SYS_RESOURCE_H_ */