shareLib.h

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/*************************************************************************\
* Copyright (c) 2012 UChicago Argonne LLC, as Operator of Argonne
*     National Laboratory.
* Copyright (c) 2002 The Regents of the University of California, as
*     Operator of Los Alamos National Laboratory.
* SPDX-License-Identifier: EPICS
* EPICS BASE is distributed subject to a Software License Agreement found
* in file LICENSE that is included with this distribution.
\*************************************************************************/
#undef epicsShareExtern
#undef epicsShareDef
#undef epicsShareClass
#undef epicsShareFunc
#undef epicsShareAPI
#undef READONLY

#if defined(_WIN32) || defined(__CYGWIN__)
/*
 * Check if EPICS_BUILD_DLL or EPICS_CALL_DLL defined and use the dllimport/
 * dllexport keywords if this is a shared library build of base under WIN32.
 */

#   if defined(epicsExportSharedSymbols)
#       if defined(EPICS_BUILD_DLL)
#           define epicsShareExtern __declspec(dllexport) extern
#           define epicsShareClass  __declspec(dllexport)
#           define epicsShareFunc   __declspec(dllexport)
#       else
#           define epicsShareExtern extern
#           define epicsShareClass
#           define epicsShareFunc
#       endif
#   else
#       if defined(EPICS_CALL_DLL)
#           define epicsShareExtern __declspec(dllimport) extern
#           define epicsShareClass  __declspec(dllimport)
#           define epicsShareFunc   __declspec(dllimport)
#       else
#           define epicsShareExtern extern
#           define epicsShareClass
#           define epicsShareFunc
#       endif
#   endif
#   define epicsShareDef
#   define epicsShareAPI __stdcall /* function removes arguments */
#   define READONLY const

#elif __GNUC__ >= 4
/*
 * See http://gcc.gnu.org/wiki/Visibility
 * For these to work, gcc must be given the flag
 *     -fvisibility=hidden
 * and g++ the flags
 *     -fvisibility=hidden -fvisibility-inlines-hidden
 */

#   define epicsShareExtern __attribute__ ((visibility("default"))) extern
#   define epicsShareClass __attribute__ ((visibility("default")))
#   define epicsShareFunc __attribute__ ((visibility("default")))

#   define epicsShareDef
#   define epicsShareAPI
#   if defined(__STDC__) || defined (__cplusplus)
#       define READONLY const
#   else
#       define READONLY
#   endif

/*
 * if its the old VAX C Compiler (not DEC C)
 */
#elif defined(VAXC)

    /*
     * VAXC creates FORTRAN common blocks when
     * we use "extern int fred"/"int fred=4". Therefore,
     * the initialization is not loaded unless we
     * call a function in that object module.
     *
     * DEC CXX does not have this problem.
     * We suspect (but do not know) that DEC C
     *  also does not have this problem.
     */
#   define epicsShareExtern globalref
#   define epicsShareDef globaldef
#   define READONLY const
#   define epicsShareClass
#   define epicsShareFunc
#   define epicsShareAPI

#else

/* else => no import/export specifiers */

#   define epicsShareExtern extern
#   define epicsShareAPI
#   define epicsShareClass
#   define epicsShareDef

#   define epicsShareFunc
#   if defined(__STDC__) || defined (__cplusplus)
#       define READONLY const
#   else
#       define READONLY
#   endif

#endif

#ifndef INLINE_defs_EPICS
#define INLINE_defs_EPICS
#   ifndef __cplusplus
#       if defined (__GNUC__)
#           define INLINE static __inline__
#       elif defined (_MSC_VER)
#           define INLINE __inline
#       elif defined (_SUNPRO_C)
#           pragma error_messages (off, E_EXTERN_PRIOR_REDECL_STATIC)
#           define INLINE static
#       else
#           define INLINE static
#       endif
#   endif /* ifndef __cplusplus */
#endif /* ifdef INLINE_defs_EPICS */