c4e20cad00
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
136 lines
4.4 KiB
C
136 lines
4.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (c) 1994, Henrik Vestergaard Draboel
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* All rights reserved.
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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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* 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 the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Henrik Vestergaard Draboel.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_PRIORITY_H_
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#define _SYS_PRIORITY_H_
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/*
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* Process priority specifications.
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*/
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/*
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* Priority classes.
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*/
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#define PRI_ITHD 1 /* Interrupt thread. */
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#define PRI_REALTIME 2 /* Real time process. */
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#define PRI_TIMESHARE 3 /* Time sharing process. */
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#define PRI_IDLE 4 /* Idle process. */
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/*
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* PRI_FIFO is POSIX.1B SCHED_FIFO.
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*/
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#define PRI_FIFO_BIT 8
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#define PRI_FIFO (PRI_FIFO_BIT | PRI_REALTIME)
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#define PRI_BASE(P) ((P) & ~PRI_FIFO_BIT)
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#define PRI_IS_REALTIME(P) (PRI_BASE(P) == PRI_REALTIME)
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#define PRI_NEED_RR(P) ((P) != PRI_FIFO)
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/*
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* Priorities. Note that with 64 run queues, differences less than 4 are
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* insignificant.
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*/
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/*
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* Priorities range from 0 to 255, but differences of less then 4 (RQ_PPQ)
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* are insignificant. Ranges are as follows:
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*
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* Interrupt threads: 0 - 47
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* Realtime user threads: 48 - 79
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* Top half kernel threads: 80 - 119
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* Time sharing user threads: 120 - 223
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* Idle user threads: 224 - 255
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*
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* XXX If/When the specific interrupt thread and top half thread ranges
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* disappear, a larger range can be used for user processes.
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*/
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#define PRI_MIN (0) /* Highest priority. */
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#define PRI_MAX (255) /* Lowest priority. */
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#define PRI_MIN_ITHD (PRI_MIN)
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#define PRI_MAX_ITHD (PRI_MIN_REALTIME - 1)
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#define PI_REALTIME (PRI_MIN_ITHD + 0)
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#define PI_AV (PRI_MIN_ITHD + 4)
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#define PI_NET (PRI_MIN_ITHD + 8)
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#define PI_DISK (PRI_MIN_ITHD + 12)
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#define PI_TTY (PRI_MIN_ITHD + 16)
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#define PI_DULL (PRI_MIN_ITHD + 20)
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#define PI_SOFT (PRI_MIN_ITHD + 24)
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#define PI_SWI(x) (PI_SOFT + (x) * RQ_PPQ)
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#define PRI_MIN_REALTIME (48)
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#define PRI_MAX_REALTIME (PRI_MIN_KERN - 1)
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#define PRI_MIN_KERN (80)
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#define PRI_MAX_KERN (PRI_MIN_TIMESHARE - 1)
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#define PSWP (PRI_MIN_KERN + 0)
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#define PVM (PRI_MIN_KERN + 4)
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#define PINOD (PRI_MIN_KERN + 8)
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#define PRIBIO (PRI_MIN_KERN + 12)
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#define PVFS (PRI_MIN_KERN + 16)
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#define PZERO (PRI_MIN_KERN + 20)
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#define PSOCK (PRI_MIN_KERN + 24)
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#define PWAIT (PRI_MIN_KERN + 28)
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#define PLOCK (PRI_MIN_KERN + 32)
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#define PPAUSE (PRI_MIN_KERN + 36)
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#define PRI_MIN_TIMESHARE (120)
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#define PRI_MAX_TIMESHARE (PRI_MIN_IDLE - 1)
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#define PUSER (PRI_MIN_TIMESHARE)
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#define PRI_MIN_IDLE (224)
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#define PRI_MAX_IDLE (PRI_MAX)
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#ifdef _KERNEL
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/* Other arguments for kern_yield(9). */
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#define PRI_USER -2 /* Change to current user priority. */
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#define PRI_UNCHANGED -1 /* Do not change priority. */
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#endif
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struct priority {
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u_char pri_class; /* Scheduling class. */
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u_char pri_level; /* Normal priority level. */
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u_char pri_native; /* Priority before propagation. */
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u_char pri_user; /* User priority based on p_cpu and p_nice. */
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};
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#endif /* !_SYS_PRIORITY_H_ */
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