forked from luck/tmp_suning_uos_patched
62026aedaa
All users are converted over to reinit_completion(). Remove the old macro now. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
110 lines
3.5 KiB
C
110 lines
3.5 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/completion.c for details.
|
|
*/
|
|
|
|
#include <linux/wait.h>
|
|
|
|
/*
|
|
* struct completion - structure used to maintain state for a "completion"
|
|
*
|
|
* This is the opaque structure used to maintain the state for a "completion".
|
|
* Completions currently use a FIFO to queue threads that have to wait for
|
|
* the "completion" event.
|
|
*
|
|
* See also: complete(), wait_for_completion() (and friends _timeout,
|
|
* _interruptible, _interruptible_timeout, and _killable), init_completion(),
|
|
* reinit_completion(), and macros DECLARE_COMPLETION(),
|
|
* DECLARE_COMPLETION_ONSTACK().
|
|
*/
|
|
struct completion {
|
|
unsigned int done;
|
|
wait_queue_head_t wait;
|
|
};
|
|
|
|
#define COMPLETION_INITIALIZER(work) \
|
|
{ 0, __WAIT_QUEUE_HEAD_INITIALIZER((work).wait) }
|
|
|
|
#define COMPLETION_INITIALIZER_ONSTACK(work) \
|
|
({ init_completion(&work); work; })
|
|
|
|
/**
|
|
* DECLARE_COMPLETION - declare and initialize a completion structure
|
|
* @work: identifier for the completion structure
|
|
*
|
|
* This macro declares and initializes a completion structure. Generally used
|
|
* for static declarations. You should use the _ONSTACK variant for automatic
|
|
* variables.
|
|
*/
|
|
#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:
|
|
*/
|
|
/**
|
|
* DECLARE_COMPLETION_ONSTACK - declare and initialize a completion structure
|
|
* @work: identifier for the completion structure
|
|
*
|
|
* This macro declares and initializes a completion structure on the kernel
|
|
* stack.
|
|
*/
|
|
#ifdef CONFIG_LOCKDEP
|
|
# define DECLARE_COMPLETION_ONSTACK(work) \
|
|
struct completion work = COMPLETION_INITIALIZER_ONSTACK(work)
|
|
#else
|
|
# define DECLARE_COMPLETION_ONSTACK(work) DECLARE_COMPLETION(work)
|
|
#endif
|
|
|
|
/**
|
|
* init_completion - Initialize a dynamically allocated completion
|
|
* @x: pointer to completion structure that is to be initialized
|
|
*
|
|
* This inline function will initialize a dynamically created completion
|
|
* structure.
|
|
*/
|
|
static inline void init_completion(struct completion *x)
|
|
{
|
|
x->done = 0;
|
|
init_waitqueue_head(&x->wait);
|
|
}
|
|
|
|
/**
|
|
* reinit_completion - reinitialize a completion structure
|
|
* @x: pointer to completion structure that is to be reinitialized
|
|
*
|
|
* This inline function should be used to reinitialize a completion structure so it can
|
|
* be reused. This is especially important after complete_all() is used.
|
|
*/
|
|
static inline void reinit_completion(struct completion *x)
|
|
{
|
|
x->done = 0;
|
|
}
|
|
|
|
extern void wait_for_completion(struct completion *);
|
|
extern void wait_for_completion_io(struct completion *);
|
|
extern int wait_for_completion_interruptible(struct completion *x);
|
|
extern int wait_for_completion_killable(struct completion *x);
|
|
extern unsigned long wait_for_completion_timeout(struct completion *x,
|
|
unsigned long timeout);
|
|
extern unsigned long wait_for_completion_io_timeout(struct completion *x,
|
|
unsigned long timeout);
|
|
extern long wait_for_completion_interruptible_timeout(
|
|
struct completion *x, unsigned long timeout);
|
|
extern long wait_for_completion_killable_timeout(
|
|
struct completion *x, unsigned long timeout);
|
|
extern bool try_wait_for_completion(struct completion *x);
|
|
extern bool completion_done(struct completion *x);
|
|
|
|
extern void complete(struct completion *);
|
|
extern void complete_all(struct completion *);
|
|
|
|
#endif
|