FreeBSD/Linux Kernel Cross Reference
sys/sys/resourcevar.h

     /*      $OpenBSD: resourcevar.h,v 1.25 2022/03/18 14:45:39 visa Exp $   */
     /*      $NetBSD: resourcevar.h,v 1.12 1995/11/22 23:01:53 cgd Exp $     */
     
     /*
      * Copyright (c) 1991, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)resourcevar.h       8.3 (Berkeley) 2/22/94
     */
    
    #ifndef _SYS_RESOURCEVAR_H_
    #define _SYS_RESOURCEVAR_H_
    
    #include <sys/refcnt.h>
    #include <sys/timeout.h>
    
    /*
     * Kernel shareable process resource limits.  Because this structure
     * is moderately large but changes infrequently, it is shared
     * copy-on-write after forks.
     */
    struct plimit {
            struct  rlimit pl_rlimit[RLIM_NLIMITS];
            struct  refcnt pl_refcnt;
    };
    
    /* add user profiling from AST */
    #define ADDUPROF(p)                                                     \
    do {                                                                    \
            atomic_clearbits_int(&(p)->p_flag, P_OWEUPC);                   \
            addupc_task((p), (p)->p_prof_addr, (p)->p_prof_ticks);          \
            (p)->p_prof_ticks = 0;                                          \
    } while (0)
    
    #ifdef _KERNEL
    
    #include <lib/libkern/libkern.h>        /* for KASSERT() */
    
    void     addupc_intr(struct proc *, u_long);
    void     addupc_task(struct proc *, u_long, u_int);
    void     tuagg_unlocked(struct process *, struct proc *);
    void     tuagg(struct process *, struct proc *);
    struct tusage;
    void     calctsru(struct tusage *, struct timespec *, struct timespec *,
                struct timespec *);
    void     calcru(struct tusage *, struct timeval *, struct timeval *,
                struct timeval *);
    void     lim_startup(struct plimit *);
    void     lim_free(struct plimit *);
    void     lim_fork(struct process *, struct process *);
    struct plimit *lim_read_enter(void);
    
    /*
     * Finish read access to resource limits.
     */
    static inline void
    lim_read_leave(struct plimit *limit)
    {
            /* nothing */
    }
    
    /*
     * Get the value of the resource limit in current process.
     */
    static inline rlim_t
    lim_cur(int which)
    {
            struct plimit *limit;
            rlim_t val;
    
            KASSERT(which >= 0 && which < RLIM_NLIMITS);
    
            limit = lim_read_enter();
            val = limit->pl_rlimit[which].rlim_cur;
            lim_read_leave(limit);
           return (val);
   }
   
   rlim_t   lim_cur_proc(struct proc *, int);
   
   void     ruadd(struct rusage *, struct rusage *);
   void     rucheck(void *);
   #endif
   #endif  /* !_SYS_RESOURCEVAR_H_ */

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