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/*
** dlfcn.c -- limited implementation of posix dynamic loading functions
*/
/*
* Copyright (C) 2003 the Free Software Foundation, Inc.
*
* This file is part of GAWK, the GNU implementation of the
* AWK Programming Language.
*
* GAWK is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GAWK is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <dlfcn.h>
#include <errno.h>
#include <windows.h>
/* open the library file. We currently ignore flags. */
void *dlopen(const char * libname, int flags)
{
HMODULE libH;
/* if libname is specified, we need to load a library of that name */
if (libname) {
libH = LoadLibrary(libname);
}
/* otherwise, we're supposed to return a handle to global symbol
* information, which includes the executable and all libraries loaded
* with RTLD_GLOBAL. For our purposes, it doesn't really matter, so
* we simply return the handle to the .exe */
else {
libH = GetModuleHandle(NULL);
}
return (void *)libH;
}
/* don't need the library any more */
int dlclose(void * libH)
{
int rc;
if (FreeLibrary((HMODULE)libH)) {
rc = 0;
}
else {
rc = -1;
}
return rc;
}
/* find the symbol */
void *dlsym(void * /*restrict*/ libH, const char * /*restrict*/ fnName)
{
return (void *)GetProcAddress((HMODULE)libH, fnName);
}
char *dlerror(void)
{
static char errbuf[1024];
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), errbuf, sizeof(errbuf), NULL);
return errbuf;
}
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