711 lines
19 KiB
C++
711 lines
19 KiB
C++
/*
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https://github.com/peterix/dfhack
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Copyright (c) 2009-2012 Petr Mrázek (peterix@gmail.com)
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any
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damages arising from the use of this software.
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Permission is granted to anyone to use this software for any
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purpose, including commercial applications, and to alter it and
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redistribute it freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must
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not claim that you wrote the original software. If you use this
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software in a product, an acknowledgment in the product documentation
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would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and
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must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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*/
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#include "Internal.h"
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#include "Core.h"
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#include "MemAccess.h"
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#include "PluginManager.h"
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#include "RemoteServer.h"
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#include "Console.h"
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#include "Types.h"
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#include "DataDefs.h"
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#include "MiscUtils.h"
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#include "LuaWrapper.h"
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#include "LuaTools.h"
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using namespace DFHack;
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#include <string>
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#include <vector>
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#include <map>
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using namespace std;
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#include "tinythread.h"
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using namespace tthread;
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#include <assert.h>
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struct Plugin::RefLock
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{
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RefLock()
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{
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refcount = 0;
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wakeup = new condition_variable();
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mut = new mutex();
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}
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~RefLock()
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{
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delete wakeup;
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delete mut;
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}
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void lock()
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{
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mut->lock();
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}
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void unlock()
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{
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mut->unlock();
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}
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void lock_add()
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{
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mut->lock();
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refcount ++;
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mut->unlock();
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}
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void lock_sub()
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{
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mut->lock();
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if (--refcount == 0)
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wakeup->notify_one();
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mut->unlock();
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}
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void wait()
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{
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while(refcount)
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{
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wakeup->wait(*mut);
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}
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}
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condition_variable * wakeup;
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mutex * mut;
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int refcount;
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};
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struct Plugin::RefAutolock
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{
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RefLock * lock;
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RefAutolock(RefLock * lck):lock(lck){ lock->lock(); };
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~RefAutolock(){ lock->unlock(); };
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};
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struct Plugin::RefAutoinc
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{
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RefLock * lock;
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RefAutoinc(RefLock * lck):lock(lck){ lock->lock_add(); };
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~RefAutoinc(){ lock->lock_sub(); };
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};
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struct Plugin::LuaCommand {
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Plugin *owner;
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std::string name;
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int (*command)(lua_State *state);
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LuaCommand(Plugin *owner, std::string name)
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: owner(owner), name(name), command(NULL) {}
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};
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struct Plugin::LuaFunction {
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Plugin *owner;
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std::string name;
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function_identity_base *identity;
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bool silent;
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LuaFunction(Plugin *owner, std::string name)
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: owner(owner), name(name), identity(NULL), silent(false) {}
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};
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struct Plugin::LuaEvent : public Lua::Event::Owner {
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LuaFunction handler;
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Lua::Notification *event;
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bool active;
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int count;
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LuaEvent(Plugin *owner, std::string name)
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: handler(owner,name), event(NULL), active(false), count(0)
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{
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handler.silent = true;
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}
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void on_count_changed(int new_cnt, int delta) {
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RefAutoinc lock(handler.owner->access);
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count = new_cnt;
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if (event)
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event->on_count_changed(new_cnt, delta);
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}
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void on_invoked(lua_State *state, int nargs, bool from_c) {
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RefAutoinc lock(handler.owner->access);
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if (event)
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event->on_invoked(state, nargs, from_c);
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}
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};
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Plugin::Plugin(Core * core, const std::string & filepath, const std::string & _filename, PluginManager * pm)
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{
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filename = filepath;
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parent = pm;
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name.reserve(_filename.size());
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for(size_t i = 0; i < _filename.size();i++)
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{
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char ch = _filename[i];
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if(ch == '.')
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break;
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name.append(1,ch);
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}
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plugin_lib = 0;
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plugin_init = 0;
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plugin_shutdown = 0;
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plugin_status = 0;
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plugin_onupdate = 0;
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plugin_onstatechange = 0;
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plugin_rpcconnect = 0;
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state = PS_UNLOADED;
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access = new RefLock();
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}
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Plugin::~Plugin()
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{
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if(state == PS_LOADED)
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{
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unload(Core::getInstance().getConsole());
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}
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delete access;
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}
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bool Plugin::load(color_ostream &con)
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{
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{
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RefAutolock lock(access);
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if(state == PS_LOADED)
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{
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return true;
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}
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else if(state != PS_UNLOADED)
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{
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return false;
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}
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state = PS_LOADING;
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}
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// enter suspend
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CoreSuspender suspend;
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// open the library, etc
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DFLibrary * plug = OpenPlugin(filename.c_str());
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if(!plug)
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{
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con.printerr("Can't load plugin %s\n", filename.c_str());
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RefAutolock lock(access);
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state = PS_BROKEN;
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return false;
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}
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const char ** plug_name =(const char ** ) LookupPlugin(plug, "name");
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const char ** plug_version =(const char ** ) LookupPlugin(plug, "version");
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if(!plug_name || !plug_version)
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{
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con.printerr("Plugin %s has no name or version.\n", filename.c_str());
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ClosePlugin(plug);
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RefAutolock lock(access);
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state = PS_BROKEN;
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return false;
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}
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if(strcmp(DFHACK_VERSION, *plug_version) != 0)
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{
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con.printerr("Plugin %s was not built for this version of DFHack.\n"
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"Plugin: %s, DFHack: %s\n", *plug_name, *plug_version, DFHACK_VERSION);
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ClosePlugin(plug);
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RefAutolock lock(access);
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state = PS_BROKEN;
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return false;
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}
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RefAutolock lock(access);
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plugin_init = (command_result (*)(color_ostream &, std::vector <PluginCommand> &)) LookupPlugin(plug, "plugin_init");
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if(!plugin_init)
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{
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con.printerr("Plugin %s has no init function.\n", filename.c_str());
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ClosePlugin(plug);
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state = PS_BROKEN;
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return false;
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}
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plugin_status = (command_result (*)(color_ostream &, std::string &)) LookupPlugin(plug, "plugin_status");
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plugin_onupdate = (command_result (*)(color_ostream &)) LookupPlugin(plug, "plugin_onupdate");
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plugin_shutdown = (command_result (*)(color_ostream &)) LookupPlugin(plug, "plugin_shutdown");
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plugin_onstatechange = (command_result (*)(color_ostream &, state_change_event)) LookupPlugin(plug, "plugin_onstatechange");
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plugin_rpcconnect = (RPCService* (*)(color_ostream &)) LookupPlugin(plug, "plugin_rpcconnect");
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plugin_eval_ruby = (command_result (*)(color_ostream &, const char*)) LookupPlugin(plug, "plugin_eval_ruby");
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index_lua(plug);
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this->name = *plug_name;
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plugin_lib = plug;
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commands.clear();
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if(plugin_init(con,commands) == CR_OK)
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{
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state = PS_LOADED;
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parent->registerCommands(this);
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return true;
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}
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else
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{
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con.printerr("Plugin %s has failed to initialize properly.\n", filename.c_str());
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reset_lua();
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ClosePlugin(plugin_lib);
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state = PS_BROKEN;
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return false;
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}
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}
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bool Plugin::unload(color_ostream &con)
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{
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// get the mutex
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access->lock();
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// if we are actually loaded
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if(state == PS_LOADED)
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{
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// notify the plugin about an attempt to shutdown
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if (plugin_onstatechange &&
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plugin_onstatechange(con, SC_BEGIN_UNLOAD) == CR_NOT_FOUND)
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{
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con.printerr("Plugin %s has refused to be unloaded.\n", name.c_str());
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access->unlock();
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return false;
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}
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// wait for all calls to finish
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access->wait();
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state = PS_UNLOADING;
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access->unlock();
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// enter suspend
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CoreSuspender suspend;
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access->lock();
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// notify plugin about shutdown, if it has a shutdown function
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command_result cr = CR_OK;
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if(plugin_shutdown)
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cr = plugin_shutdown(con);
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// cleanup...
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reset_lua();
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parent->unregisterCommands(this);
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commands.clear();
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if(cr == CR_OK)
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{
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ClosePlugin(plugin_lib);
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state = PS_UNLOADED;
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access->unlock();
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return true;
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}
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else
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{
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con.printerr("Plugin %s has failed to shutdown!\n",name.c_str());
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state = PS_BROKEN;
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access->unlock();
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return false;
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}
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}
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else if(state == PS_UNLOADED)
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{
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access->unlock();
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return true;
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}
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access->unlock();
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return false;
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}
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bool Plugin::reload(color_ostream &out)
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{
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if(state != PS_LOADED)
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return false;
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if(!unload(out))
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return false;
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if(!load(out))
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return false;
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return true;
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}
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command_result Plugin::invoke(color_ostream &out, const std::string & command, std::vector <std::string> & parameters)
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{
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Core & c = Core::getInstance();
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command_result cr = CR_NOT_IMPLEMENTED;
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access->lock_add();
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if(state == PS_LOADED)
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{
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for (size_t i = 0; i < commands.size();i++)
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{
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PluginCommand &cmd = commands[i];
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if(cmd.name == command)
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{
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// running interactive things from some other source than the console would break it
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if(!out.is_console() && cmd.interactive)
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cr = CR_NEEDS_CONSOLE;
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else if (cmd.guard)
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{
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// Execute hotkey commands in a way where they can
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// expect their guard conditions to be matched,
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// so as to avoid duplicating checks.
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// This means suspending the core beforehand.
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CoreSuspender suspend(&c);
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df::viewscreen *top = c.getTopViewscreen();
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if (!cmd.guard(top))
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{
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out.printerr("Could not invoke %s: unsuitable UI state.\n", command.c_str());
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cr = CR_WRONG_USAGE;
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}
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else
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{
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cr = cmd.function(out, parameters);
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}
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}
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else
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{
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cr = cmd.function(out, parameters);
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}
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if (cr == CR_WRONG_USAGE && !cmd.usage.empty())
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out << "Usage:\n" << cmd.usage << flush;
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break;
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}
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}
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}
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access->lock_sub();
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return cr;
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}
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bool Plugin::can_invoke_hotkey(const std::string & command, df::viewscreen *top )
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{
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Core & c = Core::getInstance();
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bool cr = false;
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access->lock_add();
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if(state == PS_LOADED)
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{
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for (size_t i = 0; i < commands.size();i++)
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{
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PluginCommand &cmd = commands[i];
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if(cmd.name == command)
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{
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if (cmd.interactive)
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cr = false;
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else if (cmd.guard)
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cr = cmd.guard(top);
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else
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cr = Gui::default_hotkey(top);
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break;
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}
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}
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}
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access->lock_sub();
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return cr;
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}
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command_result Plugin::on_update(color_ostream &out)
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{
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command_result cr = CR_NOT_IMPLEMENTED;
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access->lock_add();
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if(state == PS_LOADED && plugin_onupdate)
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{
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cr = plugin_onupdate(out);
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Lua::Core::Reset(out, "plugin_onupdate");
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}
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access->lock_sub();
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return cr;
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}
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command_result Plugin::on_state_change(color_ostream &out, state_change_event event)
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{
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command_result cr = CR_NOT_IMPLEMENTED;
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access->lock_add();
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if(state == PS_LOADED && plugin_onstatechange)
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{
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cr = plugin_onstatechange(out, event);
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Lua::Core::Reset(out, "plugin_onstatechange");
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}
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access->lock_sub();
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return cr;
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}
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RPCService *Plugin::rpc_connect(color_ostream &out)
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{
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RPCService *rv = NULL;
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access->lock_add();
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if(state == PS_LOADED && plugin_rpcconnect)
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{
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rv = plugin_rpcconnect(out);
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}
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if (rv)
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{
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// Retain the access reference
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assert(!rv->holder);
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services.push_back(rv);
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rv->holder = this;
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return rv;
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}
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else
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{
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access->lock_sub();
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return NULL;
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}
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}
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void Plugin::detach_connection(RPCService *svc)
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{
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int idx = linear_index(services, svc);
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assert(svc->holder == this && idx >= 0);
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vector_erase_at(services, idx);
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access->lock_sub();
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}
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Plugin::plugin_state Plugin::getState() const
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{
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return state;
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}
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void Plugin::index_lua(DFLibrary *lib)
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{
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if (auto cmdlist = (CommandReg*)LookupPlugin(lib, "plugin_lua_commands"))
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{
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for (; cmdlist->name; ++cmdlist)
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{
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auto &cmd = lua_commands[cmdlist->name];
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if (!cmd) cmd = new LuaCommand(this,cmdlist->name);
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cmd->command = cmdlist->command;
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}
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}
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if (auto funlist = (FunctionReg*)LookupPlugin(lib, "plugin_lua_functions"))
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{
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for (; funlist->name; ++funlist)
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{
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auto &cmd = lua_functions[funlist->name];
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if (!cmd) cmd = new LuaFunction(this,funlist->name);
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cmd->identity = funlist->identity;
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}
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}
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if (auto evlist = (EventReg*)LookupPlugin(lib, "plugin_lua_events"))
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{
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for (; evlist->name; ++evlist)
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{
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auto &cmd = lua_events[evlist->name];
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if (!cmd) cmd = new LuaEvent(this,evlist->name);
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cmd->handler.identity = evlist->event->get_handler();
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cmd->event = evlist->event;
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if (cmd->active)
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{
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cmd->event->bind(Lua::Core::State, cmd);
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if (cmd->count > 0)
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cmd->event->on_count_changed(cmd->count, 0);
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}
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}
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}
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}
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void Plugin::reset_lua()
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{
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for (auto it = lua_commands.begin(); it != lua_commands.end(); ++it)
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it->second->command = NULL;
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for (auto it = lua_functions.begin(); it != lua_functions.end(); ++it)
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it->second->identity = NULL;
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for (auto it = lua_events.begin(); it != lua_events.end(); ++it)
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{
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it->second->handler.identity = NULL;
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it->second->event = NULL;
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}
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}
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int Plugin::lua_cmd_wrapper(lua_State *state)
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{
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auto cmd = (LuaCommand*)lua_touserdata(state, lua_upvalueindex(1));
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RefAutoinc lock(cmd->owner->access);
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if (!cmd->command)
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luaL_error(state, "plugin command %s() has been unloaded",
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(cmd->owner->name+"."+cmd->name).c_str());
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return Lua::CallWithCatch(state, cmd->command, cmd->name.c_str());
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}
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int Plugin::lua_fun_wrapper(lua_State *state)
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{
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auto cmd = (LuaFunction*)lua_touserdata(state, UPVAL_CONTAINER_ID);
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RefAutoinc lock(cmd->owner->access);
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if (!cmd->identity)
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{
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if (cmd->silent)
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return 0;
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luaL_error(state, "plugin function %s() has been unloaded",
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(cmd->owner->name+"."+cmd->name).c_str());
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}
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return LuaWrapper::method_wrapper_core(state, cmd->identity);
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}
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void Plugin::open_lua(lua_State *state, int table)
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{
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table = lua_absindex(state, table);
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RefAutolock lock(access);
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for (auto it = lua_commands.begin(); it != lua_commands.end(); ++it)
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{
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lua_pushlightuserdata(state, it->second);
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lua_pushcclosure(state, lua_cmd_wrapper, 1);
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lua_setfield(state, table, it->first.c_str());
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}
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|
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for (auto it = lua_functions.begin(); it != lua_functions.end(); ++it)
|
|
{
|
|
push_function(state, it->second);
|
|
lua_setfield(state, table, it->first.c_str());
|
|
}
|
|
|
|
if (Lua::IsCoreContext(state))
|
|
{
|
|
for (auto it = lua_events.begin(); it != lua_events.end(); ++it)
|
|
{
|
|
Lua::Event::Make(state, it->second, it->second);
|
|
|
|
push_function(state, &it->second->handler);
|
|
Lua::Event::SetPrivateCallback(state, -2);
|
|
|
|
it->second->active = true;
|
|
if (it->second->event)
|
|
it->second->event->bind(Lua::Core::State, it->second);
|
|
|
|
lua_setfield(state, table, it->first.c_str());
|
|
}
|
|
}
|
|
}
|
|
|
|
void Plugin::push_function(lua_State *state, LuaFunction *fn)
|
|
{
|
|
lua_rawgetp(state, LUA_REGISTRYINDEX, &LuaWrapper::DFHACK_TYPETABLE_TOKEN);
|
|
lua_pushlightuserdata(state, NULL);
|
|
lua_pushfstring(state, "%s.%s()", name.c_str(), fn->name.c_str());
|
|
lua_pushlightuserdata(state, fn);
|
|
lua_pushcclosure(state, lua_fun_wrapper, 4);
|
|
}
|
|
|
|
PluginManager::PluginManager(Core * core)
|
|
{
|
|
#ifdef LINUX_BUILD
|
|
string path = core->getHackPath() + "plugins/";
|
|
const string searchstr = ".plug.so";
|
|
#else
|
|
string path = core->getHackPath() + "plugins\\";
|
|
const string searchstr = ".plug.dll";
|
|
#endif
|
|
cmdlist_mutex = new mutex();
|
|
eval_ruby = NULL;
|
|
vector <string> filez;
|
|
getdir(path, filez);
|
|
for(size_t i = 0; i < filez.size();i++)
|
|
{
|
|
if(hasEnding(filez[i],searchstr))
|
|
{
|
|
Plugin * p = new Plugin(core, path + filez[i], filez[i], this);
|
|
all_plugins.push_back(p);
|
|
// make all plugins load by default (until a proper design emerges).
|
|
p->load(core->getConsole());
|
|
}
|
|
}
|
|
}
|
|
|
|
PluginManager::~PluginManager()
|
|
{
|
|
for(size_t i = 0; i < all_plugins.size();i++)
|
|
{
|
|
delete all_plugins[i];
|
|
}
|
|
all_plugins.clear();
|
|
delete cmdlist_mutex;
|
|
}
|
|
|
|
Plugin *PluginManager::getPluginByName (const std::string & name)
|
|
{
|
|
for(size_t i = 0; i < all_plugins.size(); i++)
|
|
{
|
|
if(name == all_plugins[i]->name)
|
|
return all_plugins[i];
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
Plugin *PluginManager::getPluginByCommand(const std::string &command)
|
|
{
|
|
tthread::lock_guard<tthread::mutex> lock(*cmdlist_mutex);
|
|
map <string, Plugin *>::iterator iter = belongs.find(command);
|
|
if (iter != belongs.end())
|
|
return iter->second;
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
// FIXME: handle name collisions...
|
|
command_result PluginManager::InvokeCommand(color_ostream &out, const std::string & command, std::vector <std::string> & parameters)
|
|
{
|
|
Plugin *plugin = getPluginByCommand(command);
|
|
return plugin ? plugin->invoke(out, command, parameters) : CR_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
bool PluginManager::CanInvokeHotkey(const std::string &command, df::viewscreen *top)
|
|
{
|
|
Plugin *plugin = getPluginByCommand(command);
|
|
return plugin ? plugin->can_invoke_hotkey(command, top) : true;
|
|
}
|
|
|
|
void PluginManager::OnUpdate(color_ostream &out)
|
|
{
|
|
for(size_t i = 0; i < all_plugins.size(); i++)
|
|
{
|
|
all_plugins[i]->on_update(out);
|
|
}
|
|
}
|
|
|
|
void PluginManager::OnStateChange(color_ostream &out, state_change_event event)
|
|
{
|
|
for(size_t i = 0; i < all_plugins.size(); i++)
|
|
{
|
|
all_plugins[i]->on_state_change(out, event);
|
|
}
|
|
}
|
|
|
|
// FIXME: doesn't check name collisions!
|
|
void PluginManager::registerCommands( Plugin * p )
|
|
{
|
|
cmdlist_mutex->lock();
|
|
vector <PluginCommand> & cmds = p->commands;
|
|
for(size_t i = 0; i < cmds.size();i++)
|
|
{
|
|
belongs[cmds[i].name] = p;
|
|
}
|
|
if (p->plugin_eval_ruby)
|
|
eval_ruby = p->plugin_eval_ruby;
|
|
cmdlist_mutex->unlock();
|
|
}
|
|
|
|
// FIXME: doesn't check name collisions!
|
|
void PluginManager::unregisterCommands( Plugin * p )
|
|
{
|
|
cmdlist_mutex->lock();
|
|
vector <PluginCommand> & cmds = p->commands;
|
|
for(size_t i = 0; i < cmds.size();i++)
|
|
{
|
|
belongs.erase(cmds[i].name);
|
|
}
|
|
if (p->plugin_eval_ruby)
|
|
eval_ruby = NULL;
|
|
cmdlist_mutex->unlock();
|
|
}
|