kernel-ark/include/linux/completion.h
Ingo Molnar 8b3db9c542 [PATCH] lockdep: add DECLARE_COMPLETION_ONSTACK() API
lockdep needs to have the waitqueue lock initialized for on-stack waitqueues
implicitly initialized by DECLARE_COMPLETION().  Introduce the API.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-03 15:27:00 -07:00

55 lines
1.5 KiB
C

#ifndef __LINUX_COMPLETION_H
#define __LINUX_COMPLETION_H
/*
* (C) Copyright 2001 Linus Torvalds
*
* Atomic wait-for-completion handler data structures.
* See kernel/sched.c for details.
*/
#include <linux/wait.h>
struct completion {
unsigned int done;
wait_queue_head_t wait;
};
#define COMPLETION_INITIALIZER(work) \
{ 0, __WAIT_QUEUE_HEAD_INITIALIZER((work).wait) }
#define DECLARE_COMPLETION(work) \
struct completion work = COMPLETION_INITIALIZER(work)
/*
* Lockdep needs to run a non-constant initializer for on-stack
* completions - so we use the _ONSTACK() variant for those that
* are on the kernel stack:
*/
#ifdef CONFIG_LOCKDEP
# define DECLARE_COMPLETION_ONSTACK(work) \
struct completion work = ({ init_completion(&work); work; })
#else
# define DECLARE_COMPLETION_ONSTACK(work) DECLARE_COMPLETION(work)
#endif
static inline void init_completion(struct completion *x)
{
x->done = 0;
init_waitqueue_head(&x->wait);
}
extern void FASTCALL(wait_for_completion(struct completion *));
extern int FASTCALL(wait_for_completion_interruptible(struct completion *x));
extern unsigned long FASTCALL(wait_for_completion_timeout(struct completion *x,
unsigned long timeout));
extern unsigned long FASTCALL(wait_for_completion_interruptible_timeout(
struct completion *x, unsigned long timeout));
extern void FASTCALL(complete(struct completion *));
extern void FASTCALL(complete_all(struct completion *));
#define INIT_COMPLETION(x) ((x).done = 0)
#endif