29 class JvmtiRawMonitor;

   330 

   331 ///////////////////////////////////////////////////////////////

   332 //

   333 // class JvmtiRawMonitor

   334 //

   335 // Used by JVMTI methods: All RawMonitor methods (CreateRawMonitor, EnterRawMonitor, etc.)

   336 //

   337 // Wrapper for ObjectMonitor class that saves the Monitor's name

   338 //

   339 

   340 class JvmtiRawMonitor : public ObjectMonitor  {

   341 private:

   342   int           _magic;

   343   char *        _name;

   344   // JVMTI_RM_MAGIC is set in contructor and unset in destructor.

   345   enum { JVMTI_RM_MAGIC = (int)(('T' << 24) | ('I' << 16) | ('R' << 8) | 'M') };

   346 

   347 public:

   348   JvmtiRawMonitor(const char *name);

   349   ~JvmtiRawMonitor();

   350   int            magic()   { return _magic;  }

   351   const char *get_name()   { return _name; }

   352   bool        is_valid();

   353 };

   354 

   355 // Onload pending raw monitors

   356 // Class is used to cache onload or onstart monitor enter

   357 // which will transition into real monitor when

   358 // VM is fully initialized.

   359 class JvmtiPendingMonitors : public AllStatic {

   360 

   361 private:

   362   static GrowableArray<JvmtiRawMonitor*> *_monitors; // Cache raw monitor enter

   363 

   364   inline static GrowableArray<JvmtiRawMonitor*>* monitors() { return _monitors; }

   365 

   366   static void dispose() {

   367     delete monitors();

   368   }

   369 

   370 public:

   371   static void enter(JvmtiRawMonitor *monitor) {

   372     monitors()->append(monitor);

   373   }

   374 

   375   static int count() {

   376     return monitors()->length();

   377   }

   378 

   379   static void destroy(JvmtiRawMonitor *monitor) {

   380     while (monitors()->contains(monitor)) {

   381       monitors()->remove(monitor);

   382     }

   383   }

   384 

   385   // Return false if monitor is not found in the list.

   386   static bool exit(JvmtiRawMonitor *monitor) {

   387     if (monitors()->contains(monitor)) {

   388       monitors()->remove(monitor);

   389       return true;

   390     } else {

   391       return false;

   392     }

   393   }

   394 

   395   static void transition_raw_monitors();

   396 };

   397 

   398 

   399