forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
71 lines
1.8 KiB
71 lines
1.8 KiB
#ifndef _LINUX_FUTEX_H |
|
#define _LINUX_FUTEX_H |
|
|
|
#include <uapi/linux/futex.h> |
|
|
|
struct inode; |
|
struct mm_struct; |
|
struct task_struct; |
|
union ktime; |
|
|
|
long do_futex(u32 __user *uaddr, int op, u32 val, union ktime *timeout, |
|
u32 __user *uaddr2, u32 val2, u32 val3); |
|
|
|
extern int |
|
handle_futex_death(u32 __user *uaddr, struct task_struct *curr, int pi); |
|
|
|
/* |
|
* Futexes are matched on equal values of this key. |
|
* The key type depends on whether it's a shared or private mapping. |
|
* Don't rearrange members without looking at hash_futex(). |
|
* |
|
* offset is aligned to a multiple of sizeof(u32) (== 4) by definition. |
|
* We use the two low order bits of offset to tell what is the kind of key : |
|
* 00 : Private process futex (PTHREAD_PROCESS_PRIVATE) |
|
* (no reference on an inode or mm) |
|
* 01 : Shared futex (PTHREAD_PROCESS_SHARED) |
|
* mapped on a file (reference on the underlying inode) |
|
* 10 : Shared futex (PTHREAD_PROCESS_SHARED) |
|
* (but private mapping on an mm, and reference taken on it) |
|
*/ |
|
|
|
#define FUT_OFF_INODE 1 /* We set bit 0 if key has a reference on inode */ |
|
#define FUT_OFF_MMSHARED 2 /* We set bit 1 if key has a reference on mm */ |
|
|
|
union futex_key { |
|
struct { |
|
unsigned long pgoff; |
|
struct inode *inode; |
|
int offset; |
|
} shared; |
|
struct { |
|
unsigned long address; |
|
struct mm_struct *mm; |
|
int offset; |
|
} private; |
|
struct { |
|
unsigned long word; |
|
void *ptr; |
|
int offset; |
|
} both; |
|
}; |
|
|
|
#define FUTEX_KEY_INIT (union futex_key) { .both = { .ptr = NULL } } |
|
|
|
#ifdef CONFIG_FUTEX |
|
extern void exit_robust_list(struct task_struct *curr); |
|
extern void exit_pi_state_list(struct task_struct *curr); |
|
#ifdef CONFIG_HAVE_FUTEX_CMPXCHG |
|
#define futex_cmpxchg_enabled 1 |
|
#else |
|
extern int futex_cmpxchg_enabled; |
|
#endif |
|
#else |
|
static inline void exit_robust_list(struct task_struct *curr) |
|
{ |
|
} |
|
static inline void exit_pi_state_list(struct task_struct *curr) |
|
{ |
|
} |
|
#endif |
|
#endif
|
|
|