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 21 #define COMPLETION_INITIALIZER_ONSTACK(work) \ 22 ({ init_completion(&work); work; }) 23 24 #define DECLARE_COMPLETION(work) \ 25 struct completion work = COMPLETION_INITIALIZER(work) 26 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) \ 34 struct completion work = COMPLETION_INITIALIZER_ONSTACK(work) 35 #else 36 # define DECLARE_COMPLETION_ONSTACK(work) DECLARE_COMPLETION(work) 37 #endif 38 39 static inline void init_completion(struct completion *x) 40 { 41 x->done = 0; 42 init_waitqueue_head(&x->wait); 43 } 44 45 extern void FASTCALL(wait_for_completion(struct completion *)); 46 extern int FASTCALL(wait_for_completion_interruptible(struct completion *x)); 47 extern unsigned long FASTCALL(wait_for_completion_timeout(struct completion *x, 48 unsigned long timeout)); 49 extern unsigned long FASTCALL(wait_for_completion_interruptible_timeout( 50 struct completion *x, unsigned long timeout)); 51 52 extern void FASTCALL(complete(struct completion *)); 53 extern void FASTCALL(complete_all(struct completion *)); 54 55 #define INIT_COMPLETION(x) ((x).done = 0) 56 57 #endif 58
