Ichthyostega
3e8996005e
Now using proc/lumiera.hpp and proc/nobugcfg.hpp (i.e. only for the proc-Layer). Using ON_BASIC_INIT to pull up NoBug automatically and for installing the unknown-exception handler. Add calls for ON_GLOBAL_INIT and ON_GLOBAL_SHUTDOWN hooks to main() and to the testrunner
140 lines
3.7 KiB
C++
140 lines
3.7 KiB
C++
/*
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Appconfig - for global initialization and configuration
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Copyright (C) Lumiera.org
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2008, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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#include "lib/appconfig.hpp"
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#include "common/error.hpp"
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#include "common/util.hpp"
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using util::isnil;
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using util::cStr;
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namespace lumiera
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{
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#ifndef LUMIERA_VERSION
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#define LUMIERA_VERSION 0++devel
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#endif
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Symbol ON_BASIC_INIT ("ON_BASIC_INIT");
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Symbol ON_GLOBAL_INIT ("ON_GLOBAL_INIT");
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Symbol ON_GLOBAL_SHUTDOWN ("ON_GLOBAL_SHUTDOWN");
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/** perform initialization triggered on first access.
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* Will execute the ON_BASIC_INIT hook, but under typical
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* circumstances this is a NOP, because when callbacks are
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* added to this hook, the Appconfig singleton instance has
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* already been created. For this reason, there is special
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* treatment for the ON_BASIC_INIT in LifecycleHook::add,
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* causing the provided callbacks to be fired immediately.
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* (btw, this is nothing to be worried of, because from
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* client codes POV it just behaves like intended).
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*/
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Appconfig::Appconfig()
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: configParam_ (new Configmap),
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lifecycleHooks_(new LifecycleRegistry)
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{
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lifecycleHooks_->execute (ON_BASIC_INIT); // note in most cases a NOP
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(*configParam_)["version"] = STRINGIFY (LUMIERA_VERSION);
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}
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const string &
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Appconfig::get (const string & key)
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{
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try
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{
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const string& val = (*instance().configParam_)[key];
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WARN_IF ( isnil(val), config, "undefined config parameter \"%s\" requested.", key.c_str());
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return val;
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}
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catch (...)
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{
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ERROR (config, "error while accessing configuration parameter \"%s\".", key.c_str());
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static string NOTFOUND ("");
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return NOTFOUND;
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} }
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void
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Appconfig::lifecycle (Symbol event_label)
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{
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instance().lifecycleHooks_->execute(event_label);
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}
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// ==== implementation LifecycleHook class =======
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typedef LifecycleRegistry::Hook Callback;
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LifecycleHook::LifecycleHook (Symbol eventLabel, Callback callbackFun)
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{
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this->add (eventLabel,callbackFun);
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}
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LifecycleHook&
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LifecycleHook::add (Symbol eventLabel, Callback callbackFun)
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{
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bool isNew = Appconfig::instance().lifecycleHooks_->enroll (eventLabel,callbackFun);
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if (isNew && !strcmp(ON_BASIC_INIT, eventLabel))
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callbackFun(); // when this code executes,
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// then per definition we are already post "basic init"
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// (which happens in the Appconfig ctor); thus fire it immediately
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return *this;
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}
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} // namespace lumiera
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// ==== implementation C interface =======
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void
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lumiera_LifecycleHook_add (const char* eventLabel, void callbackFun(void))
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{
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lumiera::LifecycleHook (eventLabel, callbackFun);
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}
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void
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lumiera_Lifecycle_execute (const char* eventLabel)
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{
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lumiera::Appconfig::lifecycle (eventLabel);
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}
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const char*
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lumiera_Appconfig_get (const char* key)
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{
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return cStr (lumiera::Appconfig::get(key));
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}
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