95 lines
3.5 KiB
C
95 lines
3.5 KiB
C
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/*
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* dlfcn.h
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*
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* Public interface declarations for (approximately) POSIX conforming
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* dlopen(), dlsym(), dlclose(), and dlerror() API functions.
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*
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* $Id: dlfcn.h,v 82d2db93e4de 2014/11/11 18:13:14 keithmarshall $
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*
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* Written by Keith Marshall <keithmarshall@users.sourceforge.net>
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* Copyright (C) 2014, MinGW.org Project
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*
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice, this permission notice, and the following
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* disclaimer shall be included in all copies or substantial portions of
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* the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OF OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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*/
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#ifndef _DLFCN_H
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#define _DLFCN_H 1
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#pragma GCC system_header
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#include <_mingw.h>
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/* POSIX requires the following four definitions. Our implementation
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* (currently) does not support the behaviour associated with RTLD_LAZY;
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* if specified, it is simply ignored; RTLD_NOW behaviour will prevail.
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*/
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#define RTLD_NOW 0
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#define RTLD_LAZY 1
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#define RTLD_GLOBAL 2
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#define RTLD_LOCAL 4
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/* POSIX does not yet require the following pair, but reserves them for
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* future capabilities; they will be used in contexts where a DLL module
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* handle is expected, so we reserve values of suitable type, which are
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* unlikely to ever occur as real module handles in practice.
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*/
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#define RTLD_DEFAULT (void *)(-1)
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#define RTLD_NEXT (void *)(-3)
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/* The four dlfcn API functions, dlopen(), dlsym(), dlerror(), and dlclose(),
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* are each defined privately, and made publicly accessible via corresponding
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* function pointers, within the following publicly visible structure.
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*/
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_EXTERN_C struct __dlfcn__
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{ void *(*dlopen)( const char *, int );
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void *(*dlsym)( void *__restrict__, const char *__restrict__ );
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char *(*dlerror)( void );
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int (*dlclose)( void * );
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} __mingw_dlfcn;
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/* Declare the public API for each of these functions...
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*/
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_BEGIN_C_DECLS
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/* In any event, we always declare prototypes for all four functions.
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*/
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void * dlopen( const char *, int );
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void * dlsym( void *__restrict__, const char *__restrict__ );
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int dlclose( void * );
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char * dlerror( void );
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__CRT_ALIAS __LIBIMPL__(( FUNCTION = dlopen ))
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void *dlopen( const char *__name, int __mode )
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{ return __mingw_dlfcn.dlopen( __name, __mode ); }
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__CRT_ALIAS __LIBIMPL__(( FUNCTION = dlsym ))
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void *dlsym( void *__restrict__ __module, const char *__restrict__ __name )
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{ return __mingw_dlfcn.dlsym( __module, __name ); }
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__CRT_ALIAS __LIBIMPL__(( FUNCTION = dlclose ))
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int dlclose( void *__module ){ return __mingw_dlfcn.dlclose( __module ); }
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__CRT_ALIAS __LIBIMPL__(( FUNCTION = dlerror ))
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char *dlerror( void ){ return __mingw_dlfcn.dlerror(); }
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_END_C_DECLS
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#endif /* _DLFCN_H: $RCSfile: dlfcn.h,v $: end of file */
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