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
  21 static inline void taskstats_exit_alloc(struct taskstats **ptidstats,
  22                                         struct taskstats **ptgidstats)
  23 {
  24         *ptidstats = kmem_cache_zalloc(taskstats_cache, SLAB_KERNEL);
  25         *ptgidstats = kmem_cache_zalloc(taskstats_cache, SLAB_KERNEL);
  26 }
  27
  28 static inline void taskstats_exit_free(struct taskstats *tidstats,
  29                                         struct taskstats *tgidstats)
  30 {
  31         if (tidstats)
  32                 kmem_cache_free(taskstats_cache, tidstats);
  33         if (tgidstats)
  34                 kmem_cache_free(taskstats_cache, tgidstats);
  35 }
  36
  37 extern void taskstats_exit_send(struct task_struct *, struct taskstats *,
  38                                 struct taskstats *);
  39 extern void taskstats_init_early(void);
  40
  41 #else
  42 static inline void taskstats_exit_alloc(struct taskstats **ptidstats,
  43                                         struct taskstats **ptgidstats)
  44 {}
  45 static inline void taskstats_exit_free(struct taskstats *ptidstats,
  46                                         struct taskstats *ptgidstats)
  47 {}
  48 static inline void taskstats_exit_send(struct task_struct *tsk,
  49                                         struct taskstats *tidstats,
  50                                         struct taskstats *tgidstats)
  51 {}
  52 static inline void taskstats_init_early(void)
  53 {}
  54 #endif /* CONFIG_TASKSTATS */
  55
  56 #endif
  57