satip-axe/kernel/drivers/scsi/bfa/include/cs/bfa_wc.h
2015-03-26 17:24:57 +01:00

69 lines
1.4 KiB
C

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