163 lines
4.7 KiB
C
163 lines
4.7 KiB
C
/*
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dllinit.c - DLL initialization code
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Copyright (c) 2002 - 2004 dbjh
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#if defined __CYGWIN__ && defined DLOPEN
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#include <cygwin/cygwin_dll.h>
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DECLARE_CYGWIN_DLL(DllMain);
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#endif
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#include <stdio.h>
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#include <string.h>
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#include "libdiscmage.h"
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#if defined __CYGWIN__ || defined _WIN32
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#include <windows.h>
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#ifdef __cplusplus
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extern "C" BOOL WINAPI DllMain (HINSTANCE h, DWORD reason, LPVOID ptr);
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#endif
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/*
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When this function is explicitly specified as entry point (for example by
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using the option /ENTRY of link.exe) printf() does not produce output when
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called from this function.
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*/
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BOOL WINAPI
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DllMain (HINSTANCE h, DWORD reason, LPVOID ptr)
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{
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(void) ptr; // warning remover
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switch (reason)
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{
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case DLL_PROCESS_ATTACH:
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DisableThreadLibraryCalls ((HMODULE) h);
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break;
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case DLL_PROCESS_DETACH:
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break;
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case DLL_THREAD_ATTACH:
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break;
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case DLL_THREAD_DETACH:
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break;
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}
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return TRUE;
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}
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#elif defined DJGPP
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#include "dxedll_pub.h" // for st_symbol_t
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#include "dxedll_priv.h" // must be included after headers
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#include "map.h" // of external libraries!
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int dxe_init (void);
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void *dxe_symbol (char *symbol_name);
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st_symbol_t import_export =
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{
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dxe_init, dxe_symbol, sizeof (st_symbol_t),
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL,
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{0, NULL, NULL, 0, 0, 0, NULL, 0}, {0, NULL, NULL, 0, 0, 0, NULL, 0},
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{0, NULL, NULL, 0, 0, 0, NULL, 0}, NULL, NULL, NULL, 0
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};
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st_map_t *symbol;
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int
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dxe_init (void)
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{
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symbol = map_create (17);
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symbol->cmp_key = (int (*) (void *, void *)) strcmp; // How beautiful! ;-)
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symbol = map_put (symbol, "dm_get_version", dm_get_version);
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symbol = map_put (symbol, "dm_get_version_s", dm_get_version_s);
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symbol = map_put (symbol, "dm_set_gauge", dm_set_gauge);
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symbol = map_put (symbol, "dm_open", dm_open);
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symbol = map_put (symbol, "dm_reopen", dm_reopen);
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symbol = map_put (symbol, "dm_fdopen", dm_fdopen);
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symbol = map_put (symbol, "dm_close", dm_close);
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symbol = map_put (symbol, "dm_nfo", dm_nfo);
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symbol = map_put (symbol, "dm_read", dm_read);
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symbol = map_put (symbol, "dm_write", dm_write);
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symbol = map_put (symbol, "dm_disc_read", dm_disc_read);
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symbol = map_put (symbol, "dm_disc_write", dm_disc_write);
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symbol = map_put (symbol, "dm_toc_read", dm_toc_read);
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symbol = map_put (symbol, "dm_toc_write", dm_toc_write);
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symbol = map_put (symbol, "dm_cue_read", dm_cue_read);
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symbol = map_put (symbol, "dm_cue_write", dm_cue_write);
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symbol = map_put (symbol, "dm_rip", dm_rip);
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return 0;
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}
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/*
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Normally, the code that uses a dynamic library knows what it wants, i.e., it
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searches for specific symbol names. So, for a program that uses a DXE the
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code could look something like:
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void *handle;
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int (*function1) (int);
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handle = open_module (MODULE_NAME);
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function1 = ((st_symbol_t *) handle)->function1;
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However, by adding a symbol loading function, st_symbol_t doesn't have to be
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updated if the DXE should export more or other symbols, which makes using a
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DXE less error prone. Changing st_symbol_t would also require a recompile of
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the code that uses the DXE (which is a *bad* thing).
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A symbol loading function also makes an "extension API" a bit more elegant,
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because the extension functions needn't be hardcoded in st_symbol_t;
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*/
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void *
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dxe_symbol (char *symbol_name)
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{
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return map_get (symbol, symbol_name);
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}
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#elif defined __unix__
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// The functions _init() and _fini() seem to be reserved on GNU/Linux
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#if 0
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void _init (void)
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{
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}
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void _fini (void)
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{
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}
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#endif
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#endif
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