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 #if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,0,99))
  27 static inline struct perf_event *
  28 wrapper_perf_event_create_kernel_counter(struct perf_event_attr *attr,
  29                                 int cpu,
  30                                 struct task_struct *task,
  31                                 perf_overflow_handler_t callback)
  32 {
  33         return perf_event_create_kernel_counter(attr, cpu, task, callback, NULL);
  34 }
  35 #else /* defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,0,99)) */
  36
  37 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36))
  38 static inline struct perf_event *
  39 wrapper_perf_event_create_kernel_counter(struct perf_event_attr *attr,
  40                                 int cpu,
  41                                 struct task_struct *task,
  42                                 perf_overflow_handler_t callback)
  43 {
  44         return perf_event_create_kernel_counter(attr, cpu, task, callback);
  45 }
  46 #else /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)) */
  47 static inline struct perf_event *
  48 wrapper_perf_event_create_kernel_counter(struct perf_event_attr *attr,
  49                                 int cpu,
  50                                 struct task_struct *task,
  51                                 perf_overflow_handler_t callback)
  52 {
  53         pid_t pid;
  54
  55         if (!task)
  56                 pid = -1;
  57         else
  58                 pid = task->pid;
  59
  60         return perf_event_create_kernel_counter(attr, cpu, pid, callback);
  61 }
  62
  63 #define local64_read(l)         atomic64_read(l)
  64 #endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)) */
  65
  66 #endif /* defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,0,99)) */
  67
  68 #endif /* _LTTNG_WRAPPER_PERF_H */