include/lttng/ust-api-compat.h

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright (C) 2021 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  *
   6  * LTTng-UST API compatibility header
   7  */
   8
   9 #ifndef _LTTNG_UST_API_COMPAT_H
  10 #define _LTTNG_UST_API_COMPAT_H
  11
  12 /*
  13  * In order to disable compatibility API for a range of soname major
  14  * versions, define LTTNG_UST_COMPAT_API_VERSION to the oldest major
  15  * version API for which to provide compatibility.
  16  *
  17  * If LTTNG_UST_COMPAT_API_VERSION is undefined, API compatibility for
  18  * all API versions is provided.
  19  * If LTTNG_UST_COMPAT_API_VERSION is defined to N, API compatibility
  20  * for soname N or higher is provided, leaving out (not compiling)
  21  * compatibility for soname lower than N.
  22  */
  23
  24 #ifndef LTTNG_UST_COMPAT_API_VERSION
  25 #define LTTNG_UST_COMPAT_API_VERSION 0
  26 #endif
  27
  28 #define LTTNG_UST_COMPAT_API(major)     \
  29         (LTTNG_UST_COMPAT_API_VERSION <= (major))
  30
  31 #endif /* _LTTNG_UST_API_COMPAT_H */