mirror of https://github.com/acidanthera/audk.git
132 lines
5.5 KiB
C
132 lines
5.5 KiB
C
/* $NetBSD: callout.h,v 1.22 2005/12/11 12:25:20 christos Exp $ */
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/*-
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* Copyright (c) 2000, 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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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 the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN 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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* Copyright (c) 2000-2001 Artur Grabowski <art@openbsd.org>
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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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*
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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. 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 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SYS_CALLOUT_H_
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#define _SYS_CALLOUT_H_
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/*
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* The following funkyness is to appease gcc3's strict aliasing.
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*/
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struct callout;
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struct callout_circq {
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/* next element */
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union {
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struct callout *elem;
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struct callout_circq *list;
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} cq_next;
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/* previous element */
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union {
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struct callout *elem;
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struct callout_circq *list;
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} cq_prev;
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};
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#define cq_next_e cq_next.elem
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#define cq_prev_e cq_prev.elem
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#define cq_next_l cq_next.list
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#define cq_prev_l cq_prev.list
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struct callout {
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struct callout_circq c_list; /* linkage on queue */
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void (*c_func)(void *); /* function to call */
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void *c_arg; /* function argument */
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int c_time; /* when callout fires */
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int c_flags; /* state of this entry */
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};
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#define CALLOUT_PENDING 0x0002 /* callout is on the queue */
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#define CALLOUT_FIRED 0x0004 /* callout has fired */
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#define CALLOUT_INVOKING 0x0008 /* callout function is being invoked */
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#define CALLOUT_INITIALIZER_SETFUNC(func, arg) \
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{ {{NULL}, {NULL}}, func, arg, 0, 0 }
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#define CALLOUT_INITIALIZER CALLOUT_INITIALIZER_SETFUNC(NULL, NULL)
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#ifdef _KERNEL
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void callout_startup(void);
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void callout_init(struct callout *);
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void callout_setfunc(struct callout *, void (*)(void *), void *);
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void callout_reset(struct callout *, int, void (*)(void *), void *);
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void callout_schedule(struct callout *, int);
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void callout_stop(struct callout *);
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int callout_hardclock(void);
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#define callout_setfunc(c, f, a) \
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do { \
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(c)->c_func = (f); \
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(c)->c_arg = (a); \
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} while (/*CONSTCOND*/0)
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#define callout_pending(c) ((c)->c_flags & CALLOUT_PENDING)
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#define callout_expired(c) ((c)->c_flags & CALLOUT_FIRED)
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#define callout_active(c) ((c)->c_flags & (CALLOUT_PENDING|CALLOUT_FIRED))
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#define callout_invoking(c) ((c)->c_flags & CALLOUT_INVOKING)
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#define callout_ack(c) ((c)->c_flags &= ~CALLOUT_INVOKING)
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#endif /* _KERNEL */
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#endif /* !_SYS_CALLOUT_H_ */
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