1 /* taskstats_kern.h - kernel header for per-task statistics interface
3 * Copyright (C) Shailabh Nagar, IBM Corp. 2006
4 * (C) Balbir Singh, IBM Corp. 2006
7 #ifndef _LINUX_TASKSTATS_KERN_H
8 #define _LINUX_TASKSTATS_KERN_H
10 #include <linux/taskstats.h>
11 #include <linux/sched.h>
14 TASKSTATS_MSG_UNICAST, /* send data only to requester */
15 TASKSTATS_MSG_MULTICAST, /* send data to a group */
18 #ifdef CONFIG_TASKSTATS
19 extern kmem_cache_t *taskstats_cache;
20 extern struct mutex taskstats_exit_mutex;
22 static inline void taskstats_exit_alloc(struct taskstats **ptidstats)
24 *ptidstats = kmem_cache_zalloc(taskstats_cache, SLAB_KERNEL);
27 static inline void taskstats_exit_free(struct taskstats *tidstats)
30 kmem_cache_free(taskstats_cache, tidstats);
33 static inline void taskstats_tgid_init(struct signal_struct *sig)
35 spin_lock_init(&sig->stats_lock);
39 static inline void taskstats_tgid_alloc(struct signal_struct *sig)
41 struct taskstats *stats;
44 stats = kmem_cache_zalloc(taskstats_cache, SLAB_KERNEL);
48 spin_lock_irqsave(&sig->stats_lock, flags);
53 spin_unlock_irqrestore(&sig->stats_lock, flags);
56 kmem_cache_free(taskstats_cache, stats);
59 static inline void taskstats_tgid_free(struct signal_struct *sig)
61 struct taskstats *stats = NULL;
64 spin_lock_irqsave(&sig->stats_lock, flags);
69 spin_unlock_irqrestore(&sig->stats_lock, flags);
71 kmem_cache_free(taskstats_cache, stats);
74 extern void taskstats_exit_send(struct task_struct *, struct taskstats *, int);
75 extern void taskstats_init_early(void);
76 extern void taskstats_tgid_alloc(struct signal_struct *);
78 static inline void taskstats_exit_alloc(struct taskstats **ptidstats)
80 static inline void taskstats_exit_free(struct taskstats *ptidstats)
82 static inline void taskstats_exit_send(struct task_struct *tsk,
83 struct taskstats *tidstats,
86 static inline void taskstats_tgid_init(struct signal_struct *sig)
88 static inline void taskstats_tgid_alloc(struct signal_struct *sig)
90 static inline void taskstats_tgid_free(struct signal_struct *sig)
92 static inline void taskstats_init_early(void)
94 #endif /* CONFIG_TASKSTATS */