extra/barectf-tracepoint.h

   1 #ifndef _BARECTF_TRACEPOINT_H
   2 #define _BARECTF_TRACEPOINT_H
   3
   4 /*
   5  * The MIT License (MIT)
   6  *
   7  * Copyright (c) 2016 Philippe Proulx <pproulx@efficios.com>
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a copy
  10  * of this software and associated documentation files (the "Software"), to deal
  11  * in the Software without restriction, including without limitation the rights
  12  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  13  * copies of the Software, and to permit persons to whom the Software is
  14  * furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  25  * THE SOFTWARE.
  26  */
  27
  28 /* get prefix */
  29 #ifdef BARECTF_TRACEPOINT_PREFIX
  30 # define _BARECTF_TRACEPOINT_PREFIX BARECTF_TRACEPOINT_PREFIX
  31 #else
  32 # ifdef _BARECTF_PREFIX
  33 #  define _BARECTF_TRACEPOINT_PREFIX _BARECTF_PREFIX
  34 # else
  35 #  error You need to define BARECTF_TRACEPOINT_PREFIX in order to use this header.
  36 # endif
  37 #endif
  38
  39 /* get stream name to use */
  40 #ifdef BARECTF_TRACEPOINT_STREAM
  41 # define _BARECTF_TRACEPOINT_STREAM BARECTF_TRACEPOINT_STREAM
  42 #else
  43 # ifdef _BARECTF_DEFAULT_STREAM
  44 #  define _BARECTF_TRACEPOINT_STREAM _BARECTF_DEFAULT_STREAM
  45 # else
  46 #  error You need to define BARECTF_TRACEPOINT_STREAM in order to use this header.
  47 # endif
  48 #endif
  49
  50 /* get context to use */
  51 #ifndef BARECTF_TRACEPOINT_CTX
  52 # error You need to define BARECTF_TRACEPOINT_CTX in order to use this header.
  53 #endif
  54
  55 /*
  56  * Combines 6 token. Inspired by __TP_COMBINE_TOKENS4() in
  57  * <lttng/tracepoint.h>. See sections 6.10.3 and 6.10.3.1 of
  58  * ISO/IEC 9899:1999.
  59  */
  60 #define __COMBINE_TOKENS6(_a, _b, _c, _d, _e, _f) \
  61         _a ## _b ## _c ## _d ## _e ## _f
  62 #define _COMBINE_TOKENS6(_a, _b, _c, _d, _e, _f) \
  63         __COMBINE_TOKENS6(_a, _b, _c, _d, _e, _f)
  64
  65 /* tracepoint() used by the user */
  66 #undef tracepoint
  67 #define tracepoint(_prov_name, _tp_name, ...) \
  68         _COMBINE_TOKENS6(_BARECTF_TRACEPOINT_PREFIX, _BARECTF_TRACEPOINT_STREAM, _trace_, _prov_name, _, _tp_name)(BARECTF_TRACEPOINT_CTX, ##__VA_ARGS__)
  69
  70 #endif /* _BARECTF_TRACEPOINT_H */