lttng-clock.h

   1 /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
   2  *
   3  * lttng-clock.h
   4  *
   5  * Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  */
   7
   8 #ifndef _LTTNG_CLOCK_H
   9 #define _LTTNG_CLOCK_H
  10
  11 #include <linux/module.h>
  12
  13 #define LTTNG_MODULES_UUID_STR_LEN      37
  14
  15 struct lttng_trace_clock {
  16         u64 (*read64)(void);
  17         u64 (*freq)(void);
  18         int (*uuid)(char *uuid);
  19         const char *(*name)(void);
  20         const char *(*description)(void);
  21 };
  22
  23 int lttng_clock_register_plugin(struct lttng_trace_clock *ltc,
  24                 struct module *mod);
  25 void lttng_clock_unregister_plugin(struct lttng_trace_clock *ltc,
  26                 struct module *mod);
  27
  28 #endif /* _LTTNG_TRACE_CLOCK_H */