| Shailabh Nagar | ca74e92 | 2006-07-14 00:24:36 -0700 | [diff] [blame^] | 1 | /* delayacct.h - per-task delay accounting |
| 2 | * |
| 3 | * Copyright (C) Shailabh Nagar, IBM Corp. 2006 |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 13 | * the GNU General Public License for more details. |
| 14 | * |
| 15 | */ |
| 16 | |
| 17 | #ifndef _LINUX_DELAYACCT_H |
| 18 | #define _LINUX_DELAYACCT_H |
| 19 | |
| 20 | #include <linux/sched.h> |
| 21 | |
| 22 | #ifdef CONFIG_TASK_DELAY_ACCT |
| 23 | |
| 24 | extern int delayacct_on; /* Delay accounting turned on/off */ |
| 25 | extern kmem_cache_t *delayacct_cache; |
| 26 | extern void delayacct_init(void); |
| 27 | extern void __delayacct_tsk_init(struct task_struct *); |
| 28 | extern void __delayacct_tsk_exit(struct task_struct *); |
| 29 | |
| 30 | static inline void delayacct_set_flag(int flag) |
| 31 | { |
| 32 | if (current->delays) |
| 33 | current->delays->flags |= flag; |
| 34 | } |
| 35 | |
| 36 | static inline void delayacct_clear_flag(int flag) |
| 37 | { |
| 38 | if (current->delays) |
| 39 | current->delays->flags &= ~flag; |
| 40 | } |
| 41 | |
| 42 | static inline void delayacct_tsk_init(struct task_struct *tsk) |
| 43 | { |
| 44 | /* reinitialize in case parent's non-null pointer was dup'ed*/ |
| 45 | tsk->delays = NULL; |
| 46 | if (unlikely(delayacct_on)) |
| 47 | __delayacct_tsk_init(tsk); |
| 48 | } |
| 49 | |
| 50 | static inline void delayacct_tsk_exit(struct task_struct *tsk) |
| 51 | { |
| 52 | if (tsk->delays) |
| 53 | __delayacct_tsk_exit(tsk); |
| 54 | } |
| 55 | |
| 56 | #else |
| 57 | static inline void delayacct_set_flag(int flag) |
| 58 | {} |
| 59 | static inline void delayacct_clear_flag(int flag) |
| 60 | {} |
| 61 | static inline void delayacct_init(void) |
| 62 | {} |
| 63 | static inline void delayacct_tsk_init(struct task_struct *tsk) |
| 64 | {} |
| 65 | static inline void delayacct_tsk_exit(struct task_struct *tsk) |
| 66 | {} |
| 67 | #endif /* CONFIG_TASK_DELAY_ACCT */ |
| 68 | |
| 69 | #endif |