wrapper/perf.h

   1 #ifndef _LTTNG_WRAPPER_PERF_H
   2 #define _LTTNG_WRAPPER_PERF_H
   3
   4 /*
   5  * wrapper/perf.h
   6  *
   7  * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; only
  12  * version 2.1 of the License.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #include <linux/perf_event.h>
  25
  26 #ifdef CONFIG_PERF_EVENTS
  27
  28 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0))
  29 static inline struct perf_event *
  30 wrapper_perf_event_create_kernel_counter(struct perf_event_attr *attr,
  31                                 int cpu,
  32                                 struct task_struct *task,
  33                                 perf_overflow_handler_t callback)
  34 {
  35         return perf_event_create_kernel_counter(attr, cpu, task, callback, NULL);
  36 }
  37 #else /* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)) */
  38
  39 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37))
  40 static inline struct perf_event *
  41 wrapper_perf_event_create_kernel_counter(struct perf_event_attr *attr,
  42                                 int cpu,
  43                                 struct task_struct *task,
  44                                 perf_overflow_handler_t callback)
  45 {
  46         return perf_event_create_kernel_counter(attr, cpu, task, callback);
  47 }
  48 #else /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) */
  49 static inline struct perf_event *
  50 wrapper_perf_event_create_kernel_counter(struct perf_event_attr *attr,
  51                                 int cpu,
  52                                 struct task_struct *task,
  53                                 perf_overflow_handler_t callback)
  54 {
  55         pid_t pid;
  56
  57         if (!task)
  58                 pid = -1;
  59         else
  60                 pid = task->pid;
  61
  62         return perf_event_create_kernel_counter(attr, cpu, pid, callback);
  63 }
  64
  65 #endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) */
  66
  67 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36))
  68 #define local64_read(l)         atomic64_read(l)
  69 #endif
  70
  71 #endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)) */
  72
  73 #endif /* CONFIG_PERF_EVENTS */
  74
  75 #endif /* _LTTNG_WRAPPER_PERF_H */