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Release 4.7 include/linux/rtmutex.h

Directory: include/linux
/*
 * RT Mutexes: blocking mutual exclusion locks with PI support
 *
 * started by Ingo Molnar and Thomas Gleixner:
 *
 *  Copyright (C) 2004-2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
 *  Copyright (C) 2006, Timesys Corp., Thomas Gleixner <tglx@timesys.com>
 *
 * This file contains the public data structure and API definitions.
 */

#ifndef __LINUX_RT_MUTEX_H

#define __LINUX_RT_MUTEX_H

#include <linux/linkage.h>
#include <linux/rbtree.h>
#include <linux/spinlock_types.h>

extern int max_lock_depth; /* for sysctl */

/**
 * The rt_mutex structure
 *
 * @wait_lock:  spinlock to protect the structure
 * @waiters:    rbtree root to enqueue waiters in priority order
 * @waiters_leftmost: top waiter
 * @owner:      the mutex owner
 */

struct rt_mutex {
	
raw_spinlock_t		wait_lock;
	
struct rb_root          waiters;
	
struct rb_node          *waiters_leftmost;
	
struct task_struct	*owner;
#ifdef CONFIG_DEBUG_RT_MUTEXES
	
int			save_state;
	

const char 		*name, *file;
	
int			line;
	
void			*magic;
#endif
};

struct rt_mutex_waiter;
struct hrtimer_sleeper;

#ifdef CONFIG_DEBUG_RT_MUTEXES
 extern int rt_mutex_debug_check_no_locks_freed(const void *from,
						unsigned long len);
 extern void rt_mutex_debug_check_no_locks_held(struct task_struct *task);
#else
 
static inline int rt_mutex_debug_check_no_locks_freed(const void *from, unsigned long len) { return 0; }

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ingo molnaringo molnar19100.00%1100.00%
Total19100.00%1100.00%

# define rt_mutex_debug_check_no_locks_held(task) do { } while (0) #endif #ifdef CONFIG_DEBUG_RT_MUTEXES # define __DEBUG_RT_MUTEX_INITIALIZER(mutexname) \ , .name = #mutexname, .file = __FILE__, .line = __LINE__ # define rt_mutex_init(mutex) __rt_mutex_init(mutex, __func__) extern void rt_mutex_debug_task_free(struct task_struct *tsk); #else # define __DEBUG_RT_MUTEX_INITIALIZER(mutexname) # define rt_mutex_init(mutex) __rt_mutex_init(mutex, NULL) # define rt_mutex_debug_task_free(t) do { } while (0) #endif #define __RT_MUTEX_INITIALIZER(mutexname) \ { .wait_lock = __RAW_SPIN_LOCK_UNLOCKED(mutexname.wait_lock) \ , .waiters = RB_ROOT \ , .owner = NULL \ __DEBUG_RT_MUTEX_INITIALIZER(mutexname)} #define DEFINE_RT_MUTEX(mutexname) \ struct rt_mutex mutexname = __RT_MUTEX_INITIALIZER(mutexname) /** * rt_mutex_is_locked - is the mutex locked * @lock: the mutex to be queried * * Returns 1 if the mutex is locked, 0 if unlocked. */
static inline int rt_mutex_is_locked(struct rt_mutex *lock) { return lock->owner != NULL; }

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ingo molnaringo molnar19100.00%1100.00%
Total19100.00%1100.00%

extern void __rt_mutex_init(struct rt_mutex *lock, const char *name); extern void rt_mutex_destroy(struct rt_mutex *lock); extern void rt_mutex_lock(struct rt_mutex *lock); extern int rt_mutex_lock_interruptible(struct rt_mutex *lock); extern int rt_mutex_timed_lock(struct rt_mutex *lock, struct hrtimer_sleeper *timeout); extern int rt_mutex_trylock(struct rt_mutex *lock); extern void rt_mutex_unlock(struct rt_mutex *lock); #endif

Overall Contributors

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ingo molnaringo molnar28294.00%228.57%
peter zijlstrapeter zijlstra103.33%114.29%
dave youngdave young51.67%114.29%
harvey harrisonharvey harrison10.33%114.29%
robert p. j. dayrobert p. j. day10.33%114.29%
thomas gleixnerthomas gleixner10.33%114.29%
Total300100.00%7100.00%
Directory: include/linux
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