mirror of
https://github.com/alliedmodders/metamod-source.git
synced 2024-11-29 11:24:19 +01:00
373 lines
7.0 KiB
C++
373 lines
7.0 KiB
C++
/* ======== SourceMM ========
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* Copyright (C) 2004-2005 Metamod:Source Development Team
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* No warranties of any kind
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*
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* License: zlib/libpng
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*
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* Author(s): David "BAILOPAN" Anderson
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* ============================
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*/
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#include "CPlugin.h"
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#include "CSmmAPI.h"
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#include "sourcemm.h"
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/**
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* @brief Implements functions from CPlugin.h
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* @file CPlugin.cpp
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*/
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using namespace SourceMM;
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CPluginManager g_PluginMngr;
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CPluginManager::CPluginManager()
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{
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m_LastId = Pl_MinId;
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m_AllLoaded = false;
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}
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CPluginManager::~CPluginManager()
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{
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if (m_Plugins.size())
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{
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UnloadAll();
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m_Plugins.clear();
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}
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}
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CPluginManager::CPlugin::CPlugin() : m_Lib(NULL), m_API(NULL), m_Id(0), m_Source(0)
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{
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memset(&fac_list, 0, sizeof(factories));
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}
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PluginId CPluginManager::Load(const char *file, PluginId source, bool &already, char *error, size_t maxlen)
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{
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PluginIter i;
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already = false;
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//Check if we're about to reload an old plugin
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for (i=m_Plugins.begin(); i!=m_Plugins.end(); i++)
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{
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if ( (*i) && (*i)->m_File.compare(file)==0 )
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{
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if ( (*i)->m_Status < Pl_Paused )
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{
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//Attempt to load the plugin again
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already = true;
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i = m_Plugins.erase(i);
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} else {
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//No need to load it
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already = true;
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return (*i)->m_Id;
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}
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}
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}
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CPlugin *pl = _Load(file, source, error, maxlen);
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if (!pl)
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return Pl_BadLoad;
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return pl->m_Id;
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}
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CPluginManager::CPlugin *CPluginManager::FindById(PluginId id)
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{
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PluginIter i;
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for (i=m_Plugins.begin(); i!=m_Plugins.end(); i++)
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{
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if ( (*i)->m_Id == id )
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return (*i);
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}
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return NULL;
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}
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void CPluginManager::SetAllLoaded()
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{
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m_AllLoaded = true;
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PluginIter i;
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for (i=m_Plugins.begin(); i!=m_Plugins.end(); i++)
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{
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if ( (*i) && (*i)->m_Status == Pl_Running && (*i)->m_API )
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{
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//004 is when we added this callback
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if ( (*i)->m_API->GetApiVersion() >= 004 )
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{
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(*i)->m_API->AllPluginsLoaded();
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}
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}
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}
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}
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bool CPluginManager::Pause(PluginId id, char *error, size_t maxlen)
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{
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CPlugin *pl = FindById(id);
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if (!pl)
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{
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snprintf(error, maxlen, "Plugin id not found");
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return false;
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}
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return _Pause(pl, error, maxlen);
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}
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bool CPluginManager::Unpause(PluginId id, char *error, size_t maxlen)
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{
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CPlugin *pl = FindById(id);
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if (!pl)
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{
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snprintf(error, maxlen, "Plugin id not found");
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return false;
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}
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return _Unpause(pl, error, maxlen);
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}
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bool CPluginManager::Unload(PluginId id, bool force, char *error, size_t maxlen)
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{
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CPlugin *pl = FindById(id);
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if (!pl)
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{
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snprintf(error, maxlen, "Plugin %d not found", id);
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return false;
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}
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return _Unload(pl, force, error, maxlen);
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}
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CPluginManager::CPlugin *CPluginManager::_Load(const char *file, PluginId source, char *error, size_t maxlen)
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{
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FILE *fp;
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CPlugin *pl;
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pl = new CPlugin();
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*error = '\0';
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//Add plugin to list
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pl->m_Id = m_LastId;
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pl->m_File.assign(file);
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m_Plugins.push_back(pl);
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m_LastId++;
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//Check if the file even exists
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fp = fopen(file, "r");
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if (!fp)
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{
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if (error)
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snprintf(error, maxlen, "File not found: %s", file);
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pl->m_Status = Pl_NotFound;
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} else {
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fclose(fp);
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fp = NULL;
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//Load the file
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pl->m_Lib = dlmount(file);
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if (!pl->m_Lib)
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{
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if (error)
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snprintf(error, maxlen, "%s", dlerror());
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pl->m_Status = Pl_Error;
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} else {
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CreateInterfaceFn pfn = reinterpret_cast<CreateInterfaceFn>(dlsym(pl->m_Lib, PL_EXPOSURE_C));
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if (!pfn)
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{
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if (error)
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snprintf(error, maxlen, "Function %s not found", PL_EXPOSURE_C);
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pl->m_Status = Pl_Error;
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} else {
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pl->m_API = static_cast<ISmmPlugin *>((pfn)(PLAPI_NAME, NULL));
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if (!pl->m_API)
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{
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if (error)
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snprintf(error, maxlen, "Failed to get API");
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pl->m_Status = Pl_Error;
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} else {
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if (pl->m_API->GetApiVersion() < PLAPI_MIN_VERSION)
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{
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if (error)
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snprintf(error, maxlen, "Plugin API %d is out of date with required minimum (%d)", pl->m_API->GetApiVersion(), PLAPI_MIN_VERSION);
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pl->m_Status = Pl_Error;
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} else {
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if (pl->m_API->Load(pl->m_Id, static_cast<ISmmAPI *>(&g_SmmAPI), &(pl->fac_list), error, maxlen))
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{
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pl->m_Status = Pl_Running;
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if (m_AllLoaded)
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{
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//API 004 is when we added this callback
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if (pl->m_API->GetApiVersion() >= 4)
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pl->m_API->AllPluginsLoaded();
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}
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} else {
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pl->m_Status = Pl_Refused;
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}
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}
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}
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}
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}
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}
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if (pl->m_Lib && (pl->m_Status < Pl_Paused))
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{
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dlclose(pl->m_Lib);
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pl->m_Lib = NULL;
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pl->m_API = NULL;
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}
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return pl;
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}
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bool CPluginManager::_Unload(CPluginManager::CPlugin *pl, bool force, char *error, size_t maxlen)
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{
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if (error)
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*error = '\0';
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if (pl->m_API && pl->m_Lib)
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{
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//Note, we'll always tell the plugin it will be unloading...
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if (pl->m_API->Unload(error, maxlen) || force)
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{
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//Make sure to detach it from sourcehook!
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g_SourceHook.UnloadPlugin(pl->m_Id);
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//Clean up the DLL
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dlclose(pl->m_Lib);
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pl->m_Lib = NULL;
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pl->m_API = NULL;
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//Remove the plugin from the list
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PluginIter i;
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for (i=m_Plugins.begin(); i!=m_Plugins.end(); i++)
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{
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if ( (*i)->m_Id == pl->m_Id )
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{
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i = m_Plugins.erase(i);
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break;
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}
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}
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//Free its memory
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delete pl;
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return true;
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}
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} else {
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//The plugin is not valid, and let's just remove it from the list anyway
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PluginIter i;
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for (i=m_Plugins.begin(); i!=m_Plugins.end(); i++)
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{
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if ( (*i)->m_Id == pl->m_Id )
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{
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i = m_Plugins.erase(i);
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break;
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}
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}
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delete pl;
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return true;
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}
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return false;
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}
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bool CPluginManager::_Pause(CPluginManager::CPlugin *pl, char *error, size_t maxlen)
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{
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if (error)
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*error = '\0';
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if (pl->m_Status != Pl_Running || !pl->m_API)
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{
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if (error)
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snprintf(error, maxlen, "Plugin cannot be paused");
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} else {
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if (pl->m_API->Pause(error, maxlen))
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{
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g_SourceHook.PausePlugin(pl->m_Id);
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pl->m_Status = Pl_Paused;
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return true;
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}
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}
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return false;
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}
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bool CPluginManager::_Unpause(CPluginManager::CPlugin *pl, char *error, size_t maxlen)
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{
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if (error)
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*error = '\0';
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if (pl->m_Status != Pl_Paused || !pl->m_API)
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{
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if (error)
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snprintf(error, maxlen, "Plugin cannot be unpaused");
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} else {
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if (pl->m_API->Unpause(error, maxlen))
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{
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g_SourceHook.UnpausePlugin(pl->m_Id);
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pl->m_Status = Pl_Running;
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return true;
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}
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}
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return false;
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}
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bool CPluginManager::UnloadAll()
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{
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PluginIter i;
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bool status = true;
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for (i=m_Plugins.begin(); i!=m_Plugins.end(); i++)
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{
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if ( (*i) )
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{
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if ( (*i)->m_API )
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{
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if ( (*i)->m_API->Unload(NULL, 0) )
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status = false;
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//Unlink from SourceHook
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g_SourceHook.UnloadPlugin( (*i)->m_Id );
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//Free the DLL
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dlclose( (*i)->m_Lib );
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}
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delete (*i);
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}
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i = m_Plugins.erase(i);
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}
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return status;
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}
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bool CPluginManager::Query(PluginId id, const char *&file, factories *&list, Pl_Status &status, PluginId &source)
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{
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CPlugin *pl = FindById(id);
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if (!pl)
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return false;
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file = pl->m_File.c_str();
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list = &(pl->fac_list);
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status = pl->m_Status;
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source = pl->m_Source;
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return true;
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}
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PluginIter CPluginManager::_begin()
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{
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return m_Plugins.begin();
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}
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PluginIter CPluginManager::_end()
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{
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return m_Plugins.end();
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}
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