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Release 4.12 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 <>
 *  Copyright (C) 2006, Timesys Corp., Thomas Gleixner <>
 * 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;
int			save_state;

const char 		*name, *file;
int			line;
void			*magic;

struct rt_mutex_waiter;
struct hrtimer_sleeper;

 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);
static inline int rt_mutex_debug_check_no_locks_freed(const void *from, unsigned long len) { return 0; }


Ingo Molnar19100.00%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; }


Ingo Molnar19100.00%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

Ingo Molnar28294.00%228.57%
Peter Zijlstra103.33%114.29%
Dave Young51.67%114.29%
Harvey Harrison10.33%114.29%
Thomas Gleixner10.33%114.29%
Robert P. J. Day10.33%114.29%
Directory: include/linux
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