cregit-Linux how code gets into the kernel

Release 4.7 include/linux/completion.h

Directory: include/linux
#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); }

Contributors

PersonTokensPropCommitsCommitProp
linus torvaldslinus torvalds26100.00%1100.00%
Total26100.00%1100.00%

/** * 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; }

Contributors

PersonTokensPropCommitsCommitProp
wolfram sangwolfram sang18100.00%1100.00%
Total18100.00%1100.00%

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

Overall Contributors

PersonTokensPropCommitsCommitProp
ingo molnaringo molnar8935.04%538.46%
linus torvaldslinus torvalds7328.74%17.69%
vladimir davydovvladimir davydov249.45%17.69%
wolfram sangwolfram sang218.27%17.69%
david chinnerdavid chinner207.87%17.69%
sage weilsage weil145.51%17.69%
matthew wilcoxmatthew wilcox103.94%17.69%
randy dunlaprandy dunlap20.79%17.69%
peter zijlstrapeter zijlstra10.39%17.69%
Total254100.00%13100.00%
Directory: include/linux
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