Commit | Line | Data |
---|---|---|
ca74e92b SN |
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 |