X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FScripting%2FNasalSys.hxx;h=5434844998fb077d1a5df1cab0e771a960703406;hb=6dd47822545bf27f69a18a2d0ccc8abf91daa8d5;hp=36473ed36673b58fdaf99e900a8375614b4c7868;hpb=2be85c1b1b8db11cd0161ef06a88b25d95b0f5e6;p=flightgear.git diff --git a/src/Scripting/NasalSys.hxx b/src/Scripting/NasalSys.hxx index 36473ed36..543484499 100644 --- a/src/Scripting/NasalSys.hxx +++ b/src/Scripting/NasalSys.hxx @@ -3,7 +3,70 @@ #include #include +#include #include +#include +#include +#include + +#include + + +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 _data; +}; + +SGPropertyNode* ghostToPropNode(naRef ref); +SGCondition* conditionGhost(naRef r); class FGNasalSys : public SGSubsystem { @@ -11,14 +74,91 @@ public: 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 > _loadList; + SGLockedQueue > _unloadList; + // // FGTimer subclass for handling Nasal timer callbacks. // See the implementation of the settimer() extension function for @@ -26,24 +166,102 @@ private: // 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 _listener; + vector _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