wrapper/perf.h

   1 /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
   2  *
   3  * wrapper/perf.h
   4  *
   5  * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  */
   7
   8 #ifndef _LTTNG_WRAPPER_PERF_H
   9 #define _LTTNG_WRAPPER_PERF_H
  10
  11 #include <linux/perf_event.h>
  12
  13 #ifdef CONFIG_PERF_EVENTS
  14
  15 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0))
  16 static inline struct perf_event *
  17 wrapper_perf_event_create_kernel_counter(struct perf_event_attr *attr,
  18                                 int cpu,
  19                                 struct task_struct *task,
  20                                 perf_overflow_handler_t callback)
  21 {
  22         return perf_event_create_kernel_counter(attr, cpu, task, callback, NULL);
  23 }
  24 #else /* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)) */
  25
  26 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37))
  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);
  34 }
  35 #else /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) */
  36 static inline struct perf_event *
  37 wrapper_perf_event_create_kernel_counter(struct perf_event_attr *attr,
  38                                 int cpu,
  39                                 struct task_struct *task,
  40                                 perf_overflow_handler_t callback)
  41 {
  42         pid_t pid;
  43
  44         if (!task)
  45                 pid = -1;
  46         else
  47                 pid = task->pid;
  48
  49         return perf_event_create_kernel_counter(attr, cpu, pid, callback);
  50 }
  51
  52 #endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) */
  53
  54 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36))
  55 #define local64_read(l)         atomic64_read(l)
  56 #endif
  57
  58 #endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)) */
  59
  60 #endif /* CONFIG_PERF_EVENTS */
  61
  62 #endif /* _LTTNG_WRAPPER_PERF_H */