001b8e986e
is a very rough cut supporting only open/close/read/write for char devices for the time being. It also takes some extra liberties in error value processing wrt. to the request-response protocol, but that will be fixed later. On the bright side, I haven't managed to crash my test kernel in several hours with this anymore, so it can be considered extra-stable ... All in all this is remarkably similar to puffs from multiple angles (well, actually, big surprise there) and these two will share more and more code in the future. The hardest part, coming up with the name, was done by agc. I'm not exactly sure what "pud" is supposed to stand for, but if my British is anything close to par, I understand that "pud" over there can stand for just about anything, so it's a safe bet.
69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/* $NetBSD: pud_sys.h,v 1.1 2007/11/20 18:47:06 pooka Exp $ */
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/*
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* Copyright (c) 2007 Antti Kantee. All Rights Reserved.
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*
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* Development of this software was supported by the
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* Research Foundation of Helsinki University of Technology
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* 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 OR
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* 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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#ifndef _DEV_PUD_PUDSYS_H_
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#define _DEV_PUD_PUDSYS_H_
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#include <dev/putter/putter_sys.h>
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#include <dev/pud/pud_msgif.h>
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struct pud_touser {
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struct pud_req *pt_pdr;
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kcondvar_t pt_cv;
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TAILQ_ENTRY(pud_touser) pt_entries;
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};
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struct pud_dev {
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dev_t pd_dev;
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struct putter_instance *pd_pi;
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kmutex_t pd_mtx;
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TAILQ_HEAD(,pud_touser) pd_waitq_req;
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TAILQ_HEAD(,pud_touser) pd_waitq_resp;
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kcondvar_t pd_waitq_req_cv;
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size_t pd_waitcount;
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kcondvar_t pd_draincv;
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LIST_ENTRY(pud_dev) pd_entries;
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uint64_t pd_nextreq;
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};
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int pud_config(int, int, int);
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int pud_request(dev_t, void *, size_t, int, int);
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struct pud_dev *pud_dev2pud(dev_t);
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#endif /* _DEV_PUD_PUDSYS_H_ */
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