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1da177e4 LT |
1 | #ifndef __LINUX_COMPLETION_H |
2 | #define __LINUX_COMPLETION_H | |
3 | ||
4 | /* | |
5 | * (C) Copyright 2001 Linus Torvalds | |
6 | * | |
7 | * Atomic wait-for-completion handler data structures. | |
8 | * See kernel/sched.c for details. | |
9 | */ | |
10 | ||
11 | #include <linux/wait.h> | |
12 | ||
13 | struct completion { | |
14 | unsigned int done; | |
15 | wait_queue_head_t wait; | |
16 | }; | |
17 | ||
18 | #define COMPLETION_INITIALIZER(work) \ | |
19 | { 0, __WAIT_QUEUE_HEAD_INITIALIZER((work).wait) } | |
20 | ||
f86bf9b7 IM |
21 | #define COMPLETION_INITIALIZER_ONSTACK(work) \ |
22 | ({ init_completion(&work); work; }) | |
23 | ||
1da177e4 LT |
24 | #define DECLARE_COMPLETION(work) \ |
25 | struct completion work = COMPLETION_INITIALIZER(work) | |
26 | ||
8b3db9c5 IM |
27 | /* |
28 | * Lockdep needs to run a non-constant initializer for on-stack | |
29 | * completions - so we use the _ONSTACK() variant for those that | |
30 | * are on the kernel stack: | |
31 | */ | |
32 | #ifdef CONFIG_LOCKDEP | |
33 | # define DECLARE_COMPLETION_ONSTACK(work) \ | |
f86bf9b7 | 34 | struct completion work = COMPLETION_INITIALIZER_ONSTACK(work) |
8b3db9c5 IM |
35 | #else |
36 | # define DECLARE_COMPLETION_ONSTACK(work) DECLARE_COMPLETION(work) | |
37 | #endif | |
38 | ||
1da177e4 LT |
39 | static inline void init_completion(struct completion *x) |
40 | { | |
41 | x->done = 0; | |
42 | init_waitqueue_head(&x->wait); | |
43 | } | |
44 | ||
b15136e9 IM |
45 | extern void wait_for_completion(struct completion *); |
46 | extern int wait_for_completion_interruptible(struct completion *x); | |
47 | extern unsigned long wait_for_completion_timeout(struct completion *x, | |
48 | unsigned long timeout); | |
49 | extern unsigned long wait_for_completion_interruptible_timeout( | |
50 | struct completion *x, unsigned long timeout); | |
51 | ||
52 | extern void complete(struct completion *); | |
53 | extern void complete_all(struct completion *); | |
1da177e4 LT |
54 | |
55 | #define INIT_COMPLETION(x) ((x).done = 0) | |
56 | ||
57 | #endif |