sys/dev/tprof/tprof.h

   1 /*      $NetBSD: tprof.h,v 1.3 2009/03/11 13:48:47 yamt Exp $   */
   2
   3 /*-
   4  * Copyright (c)2008,2009 YAMAMOTO Takashi,
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #ifndef _DEV_TPROF_TPROF_H_
  30 #define _DEV_TPROF_TPROF_H_
  31
  32 typedef struct tprof_backend_cookie tprof_backend_cookie_t;
  33
  34 typedef struct tprof_backend_ops {
  35         uint64_t (*tbo_estimate_freq)(void);    /* samples per second */
  36         int (*tbo_start)(tprof_backend_cookie_t *);
  37         void (*tbo_stop)(tprof_backend_cookie_t *);
  38 } tprof_backend_ops_t;
  39
  40 #define TPROF_BACKEND_VERSION   2
  41 int tprof_backend_register(const char *, const tprof_backend_ops_t *, int);
  42 int tprof_backend_unregister(const char *);
  43
  44 typedef struct {
  45         uintptr_t tfi_pc;
  46 } tprof_frame_info_t;
  47
  48 void tprof_sample(tprof_backend_cookie_t *, const tprof_frame_info_t *);
  49
  50 #endif /* _DEV_TPROF_TPROF_H_ */