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/*
* plugin-load.cc
* Copyright 2007-2013 William Pitcock and John Lindgren
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions, and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions, and the following disclaimer in the documentation
* provided with the distribution.
*
* This software is provided "as is" and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising from
* the use of this software.
*/
#include "plugins-internal.h"
#include <assert.h>
#include <errno.h>
#include <pthread.h>
#include <string.h>
#include <sys/stat.h>
#include <glib/gstdio.h>
#include <gmodule.h>
#include "audstrings.h"
#include "internal.h"
#include "plugin.h"
#include "runtime.h"
static const char * plugin_dir_list[] = {
"Transport",
"Container",
"Input",
"Output",
"Effect",
"General",
"Visualization"
};
struct LoadedModule {
Plugin * header;
GModule * module;
};
static Index<LoadedModule> loaded_modules;
bool plugin_check_flags (int version)
{
switch (aud_get_mainloop_type ())
{
case MainloopType::GLib: version &= ~_AUD_PLUGIN_GLIB_ONLY; break;
case MainloopType::Qt: version &= ~_AUD_PLUGIN_QT_ONLY; break;
}
return ! (version & 0xffff0000);
}
Plugin * plugin_load (const char * filename)
{
AUDINFO ("Loading plugin: %s.\n", filename);
GModule * module = g_module_open (filename, G_MODULE_BIND_LOCAL);
if (! module)
{
AUDERR ("%s could not be loaded: %s\n", filename, g_module_error ());
return nullptr;
}
Plugin * header;
if (! g_module_symbol (module, "aud_plugin_instance", (void * *) & header))
header = nullptr;
if (! header || header->magic != _AUD_PLUGIN_MAGIC)
{
AUDERR ("%s is not a valid Audacious plugin.\n", filename);
g_module_close (module);
return nullptr;
}
/* flags are stored in high 16 bits of version field */
if ((header->version & 0xffff) < _AUD_PLUGIN_VERSION_MIN ||
(header->version & 0xffff) > _AUD_PLUGIN_VERSION)
{
AUDERR ("%s is not compatible with this version of Audacious.\n", filename);
g_module_close (module);
return nullptr;
}
if (plugin_check_flags (header->version) &&
(header->type == PluginType::Transport ||
header->type == PluginType::Playlist ||
header->type == PluginType::Input ||
header->type == PluginType::Effect))
{
if (! header->init ())
{
AUDERR ("%s failed to initialize.\n", filename);
g_module_close (module);
return nullptr;
}
}
loaded_modules.append (header, module);
return header;
}
static void plugin_unload (LoadedModule & loaded)
{
if (plugin_check_flags (loaded.header->version) &&
(loaded.header->type == PluginType::Transport ||
loaded.header->type == PluginType::Playlist ||
loaded.header->type == PluginType::Input ||
loaded.header->type == PluginType::Effect))
{
loaded.header->cleanup ();
}
#ifndef VALGRIND_FRIENDLY
g_module_close (loaded.module);
#endif
}
/******************************************************************/
static bool scan_plugin_func (const char * path, const char * basename, void * data)
{
if (! str_has_suffix_nocase (basename, PLUGIN_SUFFIX))
return false;
GStatBuf st;
if (g_stat (path, & st) < 0)
{
AUDERR ("Unable to stat %s: %s\n", path, strerror (errno));
return false;
}
if (S_ISREG (st.st_mode))
plugin_register (path, st.st_mtime);
return false;
}
static void scan_plugins (const char * path)
{
dir_foreach (path, scan_plugin_func, nullptr);
}
void plugin_system_init ()
{
assert (g_module_supported ());
plugin_registry_load ();
const char * path = aud_get_path (AudPath::PluginDir);
for (const char * dir : plugin_dir_list)
scan_plugins (filename_build ({path, dir}));
plugin_registry_prune ();
}
void plugin_system_cleanup ()
{
plugin_registry_save ();
for (LoadedModule & loaded : loaded_modules)
plugin_unload (loaded);
loaded_modules.clear ();
}
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