include/linux/taskstats_kern.h

   1 /* taskstats_kern.h - kernel header for per-task statistics interface
   2  *
   3  * Copyright (C) Shailabh Nagar, IBM Corp. 2006
   4  *           (C) Balbir Singh,   IBM Corp. 2006
   5  */
   6
   7 #ifndef _LINUX_TASKSTATS_KERN_H
   8 #define _LINUX_TASKSTATS_KERN_H
   9
  10 #include <linux/taskstats.h>
  11 #include <linux/sched.h>
  12
  13 enum {
  14         TASKSTATS_MSG_UNICAST,          /* send data only to requester */
  15         TASKSTATS_MSG_MULTICAST,        /* send data to a group */
  16 };
  17
  18 #ifdef CONFIG_TASKSTATS
  19 extern kmem_cache_t *taskstats_cache;
  20 extern struct mutex taskstats_exit_mutex;
  21
  22 static inline void taskstats_exit_alloc(struct taskstats **ptidstats,
  23                                         struct taskstats **ptgidstats)
  24 {
  25         *ptidstats = kmem_cache_zalloc(taskstats_cache, SLAB_KERNEL);
  26         *ptgidstats = kmem_cache_zalloc(taskstats_cache, SLAB_KERNEL);
  27 }
  28
  29 static inline void taskstats_exit_free(struct taskstats *tidstats,
  30                                         struct taskstats *tgidstats)
  31 {
  32         if (tidstats)
  33                 kmem_cache_free(taskstats_cache, tidstats);
  34         if (tgidstats)
  35                 kmem_cache_free(taskstats_cache, tgidstats);
  36 }
  37
  38 extern void taskstats_exit_send(struct task_struct *, struct taskstats *,
  39                                 struct taskstats *);
  40 extern void taskstats_init_early(void);
  41
  42 #else
  43 static inline void taskstats_exit_alloc(struct taskstats **ptidstats,
  44                                         struct taskstats **ptgidstats)
  45 {}
  46 static inline void taskstats_exit_free(struct taskstats *ptidstats,
  47                                         struct taskstats *ptgidstats)
  48 {}
  49 static inline void taskstats_exit_send(struct task_struct *tsk,
  50                                         struct taskstats *tidstats,
  51                                         struct taskstats *tgidstats)
  52 {}
  53 static inline void taskstats_init_early(void)
  54 {}
  55 #endif /* CONFIG_TASKSTATS */
  56
  57 #endif
  58