69 lines
1.4 KiB
C
69 lines
1.4 KiB
C
/*
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* Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
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* All rights reserved
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* www.brocade.com
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*
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* Linux driver for Brocade Fibre Channel Host Bus Adapter.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License (GPL) Version 2 as
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* published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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/**
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* bfa_wc.h Generic wait counter.
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*/
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#ifndef __BFA_WC_H__
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#define __BFA_WC_H__
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typedef void (*bfa_wc_resume_t) (void *cbarg);
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struct bfa_wc_s {
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bfa_wc_resume_t wc_resume;
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void *wc_cbarg;
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int wc_count;
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};
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static inline void
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bfa_wc_up(struct bfa_wc_s *wc)
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{
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wc->wc_count++;
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}
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static inline void
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bfa_wc_down(struct bfa_wc_s *wc)
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{
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wc->wc_count--;
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if (wc->wc_count == 0)
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wc->wc_resume(wc->wc_cbarg);
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}
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/**
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* Initialize a waiting counter.
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*/
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static inline void
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bfa_wc_init(struct bfa_wc_s *wc, bfa_wc_resume_t wc_resume, void *wc_cbarg)
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{
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wc->wc_resume = wc_resume;
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wc->wc_cbarg = wc_cbarg;
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wc->wc_count = 0;
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bfa_wc_up(wc);
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}
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/**
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* Wait for counter to reach zero
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*/
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static inline void
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bfa_wc_wait(struct bfa_wc_s *wc)
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{
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bfa_wc_down(wc);
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}
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#endif
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