michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  * vim: set ts=8 sts=4 et sw=4 tw=99:
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef jswatchpoint_h
michael@0: #define jswatchpoint_h
michael@0: 
michael@0: #include "jsalloc.h"
michael@0: 
michael@0: #include "gc/Barrier.h"
michael@0: #include "js/HashTable.h"
michael@0: #include "js/OldDebugAPI.h"
michael@0: 
michael@0: namespace js {
michael@0: 
michael@0: struct WeakMapTracer;
michael@0: 
michael@0: struct WatchKey {
michael@0:     WatchKey() {}
michael@0:     WatchKey(JSObject *obj, jsid id) : object(obj), id(id) {}
michael@0:     WatchKey(const WatchKey &key) : object(key.object.get()), id(key.id.get()) {}
michael@0:     EncapsulatedPtrObject object;
michael@0:     EncapsulatedId id;
michael@0: 
michael@0:     bool operator!=(const WatchKey &other) const {
michael@0:         return object != other.object || id != other.id;
michael@0:     }
michael@0: };
michael@0: 
michael@0: struct Watchpoint {
michael@0:     JSWatchPointHandler handler;
michael@0:     EncapsulatedPtrObject closure;  /* This is always marked in minor GCs and so doesn't require a postbarrier. */
michael@0:     bool held;  /* true if currently running handler */
michael@0:     Watchpoint(JSWatchPointHandler handler, JSObject* closure, bool held)
michael@0:       : handler(handler), closure(closure), held(held) {}
michael@0: };
michael@0: 
michael@0: template <>
michael@0: struct DefaultHasher<WatchKey>
michael@0: {
michael@0:     typedef WatchKey Lookup;
michael@0:     static inline js::HashNumber hash(const Lookup &key);
michael@0: 
michael@0:     static bool match(const WatchKey &k, const Lookup &l) {
michael@0:         return k.object == l.object && k.id.get() == l.id.get();
michael@0:     }
michael@0: 
michael@0:     static void rekey(WatchKey &k, const WatchKey& newKey) {
michael@0:         k.object.unsafeSet(newKey.object);
michael@0:         k.id.unsafeSet(newKey.id);
michael@0:     }
michael@0: };
michael@0: 
michael@0: class WatchpointMap {
michael@0:   public:
michael@0:     typedef HashMap<WatchKey, Watchpoint, DefaultHasher<WatchKey>, SystemAllocPolicy> Map;
michael@0: 
michael@0:     bool init();
michael@0:     bool watch(JSContext *cx, HandleObject obj, HandleId id,
michael@0:                JSWatchPointHandler handler, HandleObject closure);
michael@0:     void unwatch(JSObject *obj, jsid id,
michael@0:                  JSWatchPointHandler *handlerp, JSObject **closurep);
michael@0:     void unwatchObject(JSObject *obj);
michael@0:     void clear();
michael@0: 
michael@0:     bool triggerWatchpoint(JSContext *cx, HandleObject obj, HandleId id, MutableHandleValue vp);
michael@0: 
michael@0:     static bool markCompartmentIteratively(JSCompartment *c, JSTracer *trc);
michael@0:     bool markIteratively(JSTracer *trc);
michael@0:     void markAll(JSTracer *trc);
michael@0:     static void sweepAll(JSRuntime *rt);
michael@0:     void sweep();
michael@0: 
michael@0:     static void traceAll(WeakMapTracer *trc);
michael@0:     void trace(WeakMapTracer *trc);
michael@0: 
michael@0:   private:
michael@0:     Map map;
michael@0: };
michael@0: 
michael@0: }
michael@0: 
michael@0: #endif /* jswatchpoint_h */