125 lines
5.0 KiB
C
125 lines
5.0 KiB
C
/****************************************************************************
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* include/sys/resource.h
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_SYS_RESOURCE_H
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#define __INCLUDE_SYS_RESOURCE_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <sys/types.h>
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#include <sys/time.h>
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#include <stdint.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Possible values of the 'which' argument of getpriority() and
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* setpriority()
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*/
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#define PRIO_PROCESS 1 /* 'who' argument is a process ID */
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#define PRIO_PGRP 2 /* 'who' argument is a process group ID */
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#define PRIO_USER 3 /* 'who' argument is a user ID */
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/* Possible values of the 'who' parameter of getrusage(): */
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#define RUSAGE_SELF 0 /* Returns information about the current
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* process */
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#define RUSAGE_CHILDREN 1 /* Returns information about children of
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* the current process */
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/* Possible values for the resource argument of getrlimit() and setrlimit(): */
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#define RLIMIT_CORE 1 /* Limit on size of core dump file */
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#define RLIMIT_CPU 2 /* Limit on CPU time per process. */
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#define RLIMIT_DATA 3 /* Limit on data segment size */
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#define RLIMIT_FSIZE 4 /* Limit on file size */
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#define RLIMIT_NOFILE 5 /* Limit on number of open files */
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#define RLIMIT_STACK 6 /* Limit on stack size */
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#define RLIMIT_AS 7 /* Limit on address space size */
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/* The following symbolic constants are defined. Each is a value of type
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* rlim_t.
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*
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* On implementations where all resource limits are representable in an
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* object of type rlim_t, RLIM_SAVED_MAX and RLIM_SAVED_CUR need not be
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* distinct from RLIM_INFINITY.
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*/
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#define RLIM_INFINITY UINT32_MAX /* No limit */
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#define RLIM_SAVED_MAX UINT32_MAX /* Unrepresentable saved hard limit */
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#define RLIM_SAVED_CUR UINT32_MAX /* Unrepresentable saved soft limit */
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/****************************************************************************
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* Type Definitions
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****************************************************************************/
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/* All resource limits are represented with this type. It must be an unsigned
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* integral type.
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*/
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typedef uint32_t rlim_t;
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/* Minimal, compliant rlimit structure */
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struct rlimit
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{
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rlim_t rlim_cur; /* The current (soft) limit */
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rlim_t rlim_max; /* The hard limit */
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};
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/* Minimal, compliant rusage structure */
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struct rusage
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{
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struct timeval ru_utime; /* User time used */
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struct timeval ru_stime; /* System time used */
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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int getpriority(int which, id_t who);
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int getrlimit(int resource, FAR struct rlimit *rlp);
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int getrusage(int who, FAR struct rusage *r_usage);
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int setpriority(int which, id_t who, int value);
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int setrlimit(int resource, FAR const struct rlimit *rlp);
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#endif /* __INCLUDE_SYS_RESOURCE_H */
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