1/* 2 * Copyright (c) 2005-2009 Brocade Communications Systems, Inc. 3 * All rights reserved 4 * www.brocade.com 5 * 6 * Linux driver for Brocade Fibre Channel Host Bus Adapter. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License (GPL) Version 2 as 10 * published by the Free Software Foundation 11 * 12 * This program is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 */ 17 18/** 19 * bfa_wc.h Generic wait counter. 20 */ 21 22#ifndef __BFA_WC_H__ 23#define __BFA_WC_H__ 24 25typedef void (*bfa_wc_resume_t) (void *cbarg); 26 27struct bfa_wc_s { 28 bfa_wc_resume_t wc_resume; 29 void *wc_cbarg; 30 int wc_count; 31}; 32 33static inline void 34bfa_wc_up(struct bfa_wc_s *wc) 35{ 36 wc->wc_count++; 37} 38 39static inline void 40bfa_wc_down(struct bfa_wc_s *wc) 41{ 42 wc->wc_count--; 43 if (wc->wc_count == 0) 44 wc->wc_resume(wc->wc_cbarg); 45} 46 47/** 48 * Initialize a waiting counter. 49 */ 50static inline void 51bfa_wc_init(struct bfa_wc_s *wc, bfa_wc_resume_t wc_resume, void *wc_cbarg) 52{ 53 wc->wc_resume = wc_resume; 54 wc->wc_cbarg = wc_cbarg; 55 wc->wc_count = 0; 56 bfa_wc_up(wc); 57} 58 59/** 60 * Wait for counter to reach zero 61 */ 62static inline void 63bfa_wc_wait(struct bfa_wc_s *wc) 64{ 65 bfa_wc_down(wc); 66} 67 68#endif 69