| 1 | /*
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| 2 | ** dlfcn.c -- limited implementation of posix dynamic loading functions
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| 3 | */
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| 4 |
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| 5 | /*
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| 6 | * Copyright (C) 2003 the Free Software Foundation, Inc.
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| 7 | *
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| 8 | * This file is part of GAWK, the GNU implementation of the
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| 9 | * AWK Programming Language.
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| 10 | *
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| 11 | * GAWK is free software; you can redistribute it and/or modify
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| 12 | * it under the terms of the GNU General Public License as published by
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| 13 | * the Free Software Foundation; either version 2 of the License, or
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| 14 | * (at your option) any later version.
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| 15 | *
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| 16 | * GAWK is distributed in the hope that it will be useful,
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| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | * GNU General Public License for more details.
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| 20 | *
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| 21 | * You should have received a copy of the GNU General Public License
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| 22 | * along with this program; if not, write to the Free Software
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| 23 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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| 24 | */
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| 25 |
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| 26 | #include <dlfcn.h>
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| 27 | #include <errno.h>
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| 28 | #include <windows.h>
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| 29 |
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| 30 | /* open the library file. We currently ignore flags. */
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| 31 | void *dlopen(const char * libname, int flags)
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| 32 | {
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| 33 | HMODULE libH;
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| 34 |
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| 35 |
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| 36 | /* if libname is specified, we need to load a library of that name */
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| 37 | if (libname) {
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| 38 | libH = LoadLibrary(libname);
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| 39 | }
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| 40 |
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| 41 | /* otherwise, we're supposed to return a handle to global symbol
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| 42 | * information, which includes the executable and all libraries loaded
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| 43 | * with RTLD_GLOBAL. For our purposes, it doesn't really matter, so
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| 44 | * we simply return the handle to the .exe */
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| 45 | else {
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| 46 | libH = GetModuleHandle(NULL);
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| 47 | }
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| 48 |
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| 49 | return (void *)libH;
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| 50 | }
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| 51 |
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| 52 |
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| 53 | /* don't need the library any more */
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| 54 | int dlclose(void * libH)
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| 55 | {
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| 56 | int rc;
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| 57 |
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| 58 | if (FreeLibrary((HMODULE)libH)) {
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| 59 | rc = 0;
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| 60 | }
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| 61 | else {
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| 62 | rc = -1;
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| 63 | }
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| 64 |
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| 65 | return rc;
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| 66 | }
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| 67 |
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| 68 | /* find the symbol */
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| 69 | void *dlsym(void * /*restrict*/ libH, const char * /*restrict*/ fnName)
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| 70 | {
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| 71 | return (void *)GetProcAddress((HMODULE)libH, fnName);
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| 72 | }
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| 73 |
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| 74 | char *dlerror(void)
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| 75 | {
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| 76 | static char errbuf[1024];
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| 77 |
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| 78 | FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(),
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| 79 | MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), errbuf, sizeof(errbuf), NULL);
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| 80 |
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| 81 | return errbuf;
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| 82 | }
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| 83 |
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| 84 |
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