#include <simgear/misc/sg_path.hxx>
#include <simgear/structure/subsystem_mgr.hxx>
+#include <simgear/misc/sg_dir.hxx>
#include <simgear/nasal/nasal.h>
+#include <simgear/scene/model/modellib.hxx>
+#include <simgear/xml/easyxml.hxx>
+#include <simgear/threads/SGQueue.hxx>
+
+#include <map>
+
+
+class FGNasalScript;
+class FGNasalListener;
+class SGCondition;
+
+/** Nasal model data container.
+ * load and unload methods must be run in main thread (not thread-safe). */
+class FGNasalModelData : public SGReferenced
+{
+public:
+ /** Constructor to be run in an arbitrary thread. */
+ FGNasalModelData(SGPropertyNode *root, const string& path, SGPropertyNode *prop,
+ SGPropertyNode* load, SGPropertyNode* unload) :
+ _path(path),
+ _root(root), _prop(prop),
+ _load(load), _unload(unload)
+ {
+ }
+
+ /** Load hook. Always call from inside the main loop. */
+ void load();
+
+ /** Unload hook. Always call from inside the main loop. */
+ void unload();
+
+private:
+ static unsigned int _module_id;
+
+ string _module, _path;
+ SGPropertyNode_ptr _root, _prop;
+ SGConstPropertyNode_ptr _load, _unload;
+};
+
+/** Thread-safe proxy for FGNasalModelData.
+ * modelLoaded/destroy methods only register the requested
+ * operation. Actual (un)loading of Nasal module is deferred
+ * and done in the main loop. */
+class FGNasalModelDataProxy : public simgear::SGModelData
+{
+public:
+ FGNasalModelDataProxy(SGPropertyNode *root = 0) :
+ _root(root), _data(0)
+ {
+ }
+
+ ~FGNasalModelDataProxy();
+
+ void modelLoaded(const string& path, SGPropertyNode *prop, osg::Node *);
+
+protected:
+ SGPropertyNode_ptr _root;
+ SGSharedPtr<FGNasalModelData> _data;
+};
+
+SGPropertyNode* ghostToPropNode(naRef ref);
+SGCondition* conditionGhost(naRef r);
class FGNasalSys : public SGSubsystem
{
FGNasalSys();
virtual ~FGNasalSys();
virtual void init();
- virtual void update(double dt) { /* noop */ }
+ virtual void update(double dt);
- virtual bool handleCommand(const SGPropertyNode* arg);
+ // Loads a nasal script from an external file and inserts it as a
+ // global module of the specified name.
+ bool loadModule(SGPath file, const char* moduleName);
+
+ // Simple hook to run arbitrary source code. Returns a bool to
+ // indicate successful execution. Does *not* return any Nasal
+ // values, because handling garbage-collected objects from C space
+ // is deep voodoo and violates the "simple hook" idea.
+ bool parseAndRun(const char* sourceCode);
+
+ // Slightly more complicated hook to get a handle to a precompiled
+ // Nasal script that can be invoked via a call() method. The
+ // caller is expected to delete the FGNasalScript returned from
+ // this function. The "name" argument specifies the "file name"
+ // for the source code that will be printed in Nasal stack traces
+ // on error.
+ FGNasalScript* parseScript(const char* src, const char* name=0);
// Implementation of the settimer extension function
- void setTimer(naRef args);
+ void setTimer(naContext c, int argc, naRef* args);
+
+ // Implementation of the setlistener extension function
+ naRef setListener(naContext c, int argc, naRef* args);
+ naRef removeListener(naContext c, int argc, naRef* args);
+
+ // Returns a ghost wrapper for the current _cmdArg
+ naRef cmdArgGhost();
+
+ // Callbacks for command and timer bindings
+ virtual bool handleCommand( const char* moduleName,
+ const char* fileName,
+ const char* src,
+ const SGPropertyNode* arg = 0 );
+ virtual bool handleCommand(const SGPropertyNode* arg);
+
+ bool createModule(const char* moduleName, const char* fileName,
+ const char* src, int len, const SGPropertyNode* cmdarg=0,
+ int argc=0, naRef*args=0);
+
+ void deleteModule(const char* moduleName);
+
+ /**
+ * Set member of specified hash to given value
+ */
+ void hashset(naRef hash, const char* key, naRef val);
+
+ /**
+ * Set member of globals hash to given value
+ */
+ void globalsSet(const char* key, naRef val);
+ naRef call(naRef code, int argc, naRef* args, naRef locals);
+
+ naRef callMethod(naRef code, naRef self, int argc, naRef* args, naRef locals);
+
+ naRef propNodeGhost(SGPropertyNode* handle);
+
+ void registerToLoad(FGNasalModelData* data) { _loadList.push(data);}
+ void registerToUnload(FGNasalModelData* data) { _unloadList.push(data);}
+
+ // can't call this 'globals' due to naming clash
+ naRef nasalGlobals() const
+ { return _globals; }
+
+ naContext context() const
+ { return _context; }
+
+ // This mechanism is here to allow naRefs to be passed to
+ // locations "outside" the interpreter. Normally, such a
+ // reference would be garbage collected unexpectedly. By passing
+ // it to gcSave and getting a key/handle, it can be cached in a
+ // globals.__gcsave hash. Be sure to release it with gcRelease
+ // when done.
+ int gcSave(naRef r);
+ void gcRelease(int key);
private:
+ friend class FGNasalScript;
+ friend class FGNasalListener;
+ friend class FGNasalModuleListener;
+
+ SGLockedQueue<SGSharedPtr<FGNasalModelData> > _loadList;
+ SGLockedQueue<SGSharedPtr<FGNasalModelData> > _unloadList;
+
//
// FGTimer subclass for handling Nasal timer callbacks.
// See the implementation of the settimer() extension function for
//
struct NasalTimer {
virtual void timerExpired();
+ virtual ~NasalTimer() {}
naRef handler;
- int hashKey;
+ int gcKey;
FGNasalSys* nasal;
};
- void readScriptFile(SGPath file, const char* lib);
- void hashset(naRef hash, const char* key, naRef val);
- void logError();
+ // Listener
+ std::map<int, FGNasalListener *> _listener;
+ vector<FGNasalListener *> _dead_listener;
+ static int _listenerId;
+
+ void loadPropertyScripts();
+ void loadPropertyScripts(SGPropertyNode* n);
+ void loadScriptDirectory(simgear::Dir nasalDir);
+ void addModule(string moduleName, simgear::PathList scripts);
+ void logError(naContext);
naRef parse(const char* filename, const char* buf, int len);
+ naRef genPropsModule();
naContext _context;
naRef _globals;
- naRef _timerHash;
- int _nextTimerHashKey;
+ SGPropertyNode_ptr _cmdArg;
+
+ int _nextGCKey;
+ naRef _gcHash;
+ int _callCount;
+
+ public: void handleTimer(NasalTimer* t);
+};
+
+
+class FGNasalScript {
+public:
+ ~FGNasalScript() { _nas->gcRelease(_gcKey); }
+
+ bool call() {
+ naRef n = naNil();
+ naCall(_nas->_context, _code, 0, &n, naNil(), naNil());
+ return naGetError(_nas->_context) == 0;
+ }
+
+private:
+ friend class FGNasalSys;
+ naRef _code;
+ int _gcKey;
+ FGNasalSys* _nas;
+};
+
+class FGNasalListener : public SGPropertyChangeListener {
public:
- void handleTimer(NasalTimer* t);
+ FGNasalListener(SGPropertyNode* node, naRef code, FGNasalSys* nasal,
+ int key, int id, int init, int type);
+
+ virtual ~FGNasalListener();
+ virtual void valueChanged(SGPropertyNode* node);
+ virtual void childAdded(SGPropertyNode* parent, SGPropertyNode* child);
+ virtual void childRemoved(SGPropertyNode* parent, SGPropertyNode* child);
+
+private:
+ bool changed(SGPropertyNode* node);
+ void call(SGPropertyNode* which, naRef mode);
+
+ friend class FGNasalSys;
+ SGPropertyNode_ptr _node;
+ naRef _code;
+ int _gcKey;
+ int _id;
+ FGNasalSys* _nas;
+ int _init;
+ int _type;
+ unsigned int _active;
+ bool _dead;
+ long _last_int;
+ double _last_float;
+ string _last_string;
+};
+
+
+class NasalXMLVisitor : public XMLVisitor {
+public:
+ NasalXMLVisitor(naContext c, int argc, naRef* args);
+ virtual ~NasalXMLVisitor() { naFreeContext(_c); }
+
+ virtual void startElement(const char* tag, const XMLAttributes& a);
+ virtual void endElement(const char* tag);
+ virtual void data(const char* str, int len);
+ virtual void pi(const char* target, const char* data);
+
+private:
+ void call(naRef func, int num, naRef a = naNil(), naRef b = naNil());
+ naRef make_string(const char* s, int n = -1);
+
+ naContext _c;
+ naRef _start_element, _end_element, _data, _pi;
};
#endif // __NASALSYS_HXX
projects / flightgear.git / blobdiff