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authorMax Horn2006-10-07 00:31:33 +0000
committerMax Horn2006-10-07 00:31:33 +0000
commit8d82ffd31b1b85f94f5ef3a17a5a51ae5855990d (patch)
tree4c407f207370a71e4a39ecaf19cb2c6a022b977c /backends/plugins/dc
parent26e4e1680050448ad85693d7be5cb07abdeab89c (diff)
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Added plugin providers for Win32 and DC
svn-id: r24149
Diffstat (limited to 'backends/plugins/dc')
-rw-r--r--backends/plugins/dc/dc-provider.cpp130
-rw-r--r--backends/plugins/dc/dc-provider.h42
2 files changed, 172 insertions, 0 deletions
diff --git a/backends/plugins/dc/dc-provider.cpp b/backends/plugins/dc/dc-provider.cpp
new file mode 100644
index 0000000000..bf7a607d99
--- /dev/null
+++ b/backends/plugins/dc/dc-provider.cpp
@@ -0,0 +1,130 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2001 Ludvig Strigeus
+ * Copyright (C) 2001-2006 The ScummVM project
+ *
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+
+ * This program 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#if defined(DYNAMIC_MODULES) && defined(__DC__)
+
+#include "backends/plugins/dc/dc-provider.h"
+#include "backends/plugins/dynamic-plugin.h"
+#include "common/fs.h"
+
+#include "dcloader.h"
+#define PLUGIN_DIRECTORY "/"
+#define PLUGIN_PREFIX ""
+#define PLUGIN_SUFFIX ".PLG"
+
+
+class DCPlugin : public DynamicPlugin {
+protected:
+ void *_dlHandle;
+ Common::String _filename;
+
+ virtual VoidFunc findSymbol(const char *symbol) {
+ void *func = dlsym(_dlHandle, symbol);
+ if (!func)
+ warning("Failed loading symbol '%s' from plugin '%s' (%s)", symbol, _filename.c_str(), dlerror());
+
+ // FIXME HACK: This is a HACK to circumvent a clash between the ISO C++
+ // standard and POSIX: ISO C++ disallows casting between function pointers
+ // and data pointers, but dlsym always returns a void pointer. For details,
+ // see e.g. <http://www.trilithium.com/johan/2004/12/problem-with-dlsym/>.
+ assert(sizeof(VoidFunc) == sizeof(func));
+ VoidFunc tmp;
+ memcpy(&tmp, &func, sizeof(VoidFunc));
+ return tmp;
+ }
+
+public:
+ DCPlugin(const Common::String &filename)
+ : _dlHandle(0), _filename(filename) {}
+
+ bool loadPlugin() {
+ assert(!_dlHandle);
+ _dlHandle = dlopen(_filename.c_str(), RTLD_LAZY);
+
+ if (!_dlHandle) {
+ warning("Failed loading plugin '%s' (%s)", _filename.c_str(), dlerror());
+ return false;
+ }
+
+ bool ret = DynamicPlugin::loadPlugin();
+
+ if (ret)
+ dlforgetsyms(_dlHandle);
+
+ return ret;
+ }
+ void unloadPlugin() {
+ if (_dlHandle) {
+ if (dlclose(_dlHandle) != 0)
+ warning("Failed unloading plugin '%s' (%s)", _filename.c_str(), dlerror());
+ }
+ }
+};
+
+
+DCPluginProvider::DCPluginProvider() {
+}
+
+DCPluginProvider::~DCPluginProvider() {
+}
+
+PluginList DCPluginProvider::getPlugins() {
+ PluginList pl;
+
+
+ // Load dynamic plugins
+ // TODO... this is right now just a nasty hack.
+ // This should search one or multiple directories for all plugins it can
+ // find (to this end, we maybe should use a special prefix/suffix; e.g.
+ // instead of libscumm.so, use scumm.engine or scumm.plugin etc.).
+ //
+ // The list of directories to search could be e.g.:
+ // User specified (via config file), ".", "./plugins", "$(prefix)/lib".
+ //
+ // We also need to add code which ensures what we are looking at is
+ // a) a ScummVM engine and b) matches the version of the executable.
+ // Hence one more symbol should be exported by plugins which returns
+ // the "ABI" version the plugin was built for, and we can compare that
+ // to the ABI version of the executable.
+
+ // Load all plugins.
+ // Scan for all plugins in this directory
+ FilesystemNode dir(PLUGIN_DIRECTORY);
+ FSList files;
+ if (!dir.listDir(files, FilesystemNode::kListFilesOnly)) {
+ error("Couldn't open plugin directory '%s'", PLUGIN_DIRECTORY);
+ }
+
+ for (FSList::const_iterator i = files.begin(); i != files.end(); ++i) {
+ Common::String name(i->name());
+ if (name.hasPrefix(PLUGIN_PREFIX) && name.hasSuffix(PLUGIN_SUFFIX)) {
+ pl.push_back(new DCPlugin(i->path()));
+ }
+ }
+
+
+ return pl;
+}
+
+
+#endif // defined(DYNAMIC_MODULES) && defined(__DC__)
diff --git a/backends/plugins/dc/dc-provider.h b/backends/plugins/dc/dc-provider.h
new file mode 100644
index 0000000000..fd1c053c21
--- /dev/null
+++ b/backends/plugins/dc/dc-provider.h
@@ -0,0 +1,42 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2001 Ludvig Strigeus
+ * Copyright (C) 2001-2006 The ScummVM project
+ *
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+
+ * This program 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef BACKENDS_PLUGINS_DC_H
+#define BACKENDS_PLUGINS_DC_H
+
+#include "common/stdafx.h"
+#include "base/plugins.h"
+
+#if defined(DYNAMIC_MODULES) && defined(__DC__)
+
+class DCPluginProvider : public PluginProvider {
+public:
+ DCPluginProvider();
+ ~DCPluginProvider();
+
+ virtual PluginList getPlugins();
+};
+
+#endif // defined(DYNAMIC_MODULES) && defined(__DC__)
+
+#endif