| Rasesh Mody | 8b230ed | 2010-08-23 20:24:12 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Linux network driver for Brocade Converged Network Adapter. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License (GPL) Version 2 as |
| 6 | * published by the Free Software Foundation |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | */ |
| 13 | /* |
| 14 | * Copyright (c) 2005-2010 Brocade Communications Systems, Inc. |
| 15 | * All rights reserved |
| 16 | * www.brocade.com |
| 17 | */ |
| 18 | |
| 19 | /** |
| 20 | * @file bfa_wc.h Generic wait counter. |
| 21 | */ |
| 22 | |
| 23 | #ifndef __BFA_WC_H__ |
| 24 | #define __BFA_WC_H__ |
| 25 | |
| 26 | typedef void (*bfa_wc_resume_t) (void *cbarg); |
| 27 | |
| 28 | struct bfa_wc { |
| 29 | bfa_wc_resume_t wc_resume; |
| 30 | void *wc_cbarg; |
| 31 | int wc_count; |
| 32 | }; |
| 33 | |
| 34 | static inline void |
| 35 | bfa_wc_up(struct bfa_wc *wc) |
| 36 | { |
| 37 | wc->wc_count++; |
| 38 | } |
| 39 | |
| 40 | static inline void |
| 41 | bfa_wc_down(struct bfa_wc *wc) |
| 42 | { |
| 43 | wc->wc_count--; |
| 44 | if (wc->wc_count == 0) |
| 45 | wc->wc_resume(wc->wc_cbarg); |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Initialize a waiting counter. |
| 50 | */ |
| 51 | static inline void |
| 52 | bfa_wc_init(struct bfa_wc *wc, bfa_wc_resume_t wc_resume, void *wc_cbarg) |
| 53 | { |
| 54 | wc->wc_resume = wc_resume; |
| 55 | wc->wc_cbarg = wc_cbarg; |
| 56 | wc->wc_count = 0; |
| 57 | bfa_wc_up(wc); |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Wait for counter to reach zero |
| 62 | */ |
| 63 | static inline void |
| 64 | bfa_wc_wait(struct bfa_wc *wc) |
| 65 | { |
| 66 | bfa_wc_down(wc); |
| 67 | } |
| 68 | |
| 69 | #endif |