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+/* -*- C++ -*- */
+
+//=============================================================================
+/**
+ * @file Timer_Hash_T.h
+ *
+ * $Id$
+ *
+ * @author Darrell Brunsch <brunsch@cs.wustl.edu>
+ */
+//=============================================================================
+
+#ifndef ACE_TIMER_HASH_T_H
+#define ACE_TIMER_HASH_T_H
+#include /**/ "ace/pre.h"
+
+#include "ace/Timer_Queue_T.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+#include "ace/Free_List.h"
+
+ACE_BEGIN_VERSIONED_NAMESPACE_DECL
+
+// Forward declaration.
+template <class TYPE, class FUNCTOR, class ACE_LOCK, class BUCKET>
+class ACE_Timer_Hash_T;
+
+/**
+ * @class ACE_Timer_Hash_Upcall
+ *
+ * @brief Functor for Timer_Hash
+ *
+ * This class calls up to the Timer Hash's functor from the
+ * timer queues in the hash table
+ */
+template <class TYPE, class FUNCTOR, class ACE_LOCK>
+class ACE_Timer_Hash_Upcall
+{
+public:
+ typedef ACE_Timer_Queue_T<ACE_Event_Handler *,
+ ACE_Timer_Hash_Upcall<TYPE, FUNCTOR, ACE_LOCK>,
+ ACE_Null_Mutex>
+ TIMER_QUEUE;
+
+ /// Default constructor (creates an invalid object, but needs to be here
+ /// so timer queues using this functor can be constructed)
+ ACE_Timer_Hash_Upcall (void);
+
+ /// Constructor that specifies a Timer_Hash to call up to
+ ACE_Timer_Hash_Upcall (ACE_Timer_Queue_T<TYPE, FUNCTOR, ACE_LOCK> *timer_hash);
+
+ /// This method is called when a timer is registered.
+ int registration (TIMER_QUEUE &timer_queue,
+ ACE_Event_Handler *handler,
+ const void *arg);
+
+ /// This method is called before the timer expires.
+ int preinvoke (TIMER_QUEUE &timer_queue,
+ ACE_Event_Handler *handler,
+ const void *arg,
+ int recurring_timer,
+ const ACE_Time_Value &cur_time,
+ const void *&upcall_act);
+
+ /// This method is called when the timer expires.
+ int timeout (TIMER_QUEUE &timer_queue,
+ ACE_Event_Handler *handler,
+ const void *arg,
+ int recurring_timer,
+ const ACE_Time_Value &cur_time);
+
+ /// This method is called after the timer expires.
+ int postinvoke (TIMER_QUEUE &timer_queue,
+ ACE_Event_Handler *handler,
+ const void *arg,
+ int recurring_timer,
+ const ACE_Time_Value &cur_time,
+ const void *upcall_act);
+
+ /// This method is called when a handler is cancelled
+ int cancel_type (TIMER_QUEUE &timer_queue,
+ ACE_Event_Handler *handler,
+ int dont_call,
+ int &requires_reference_counting);
+
+ /// This method is called when a timer is cancelled
+ int cancel_timer (TIMER_QUEUE &timer_queue,
+ ACE_Event_Handler *handler,
+ int dont_call,
+ int requires_reference_counting);
+
+ /// This method is called when the timer queue is destroyed and
+ /// the timer is still contained in it
+ int deletion (TIMER_QUEUE &timer_queue,
+ ACE_Event_Handler *handler,
+ const void *arg);
+
+private:
+ /// Timer Queue to do the calling up to
+ ACE_Timer_Queue_T<TYPE, FUNCTOR, ACE_LOCK> *timer_hash_;
+
+ // = Don't allow these operations for now.
+ ACE_UNIMPLEMENTED_FUNC (ACE_Timer_Hash_Upcall (const ACE_Timer_Hash_Upcall<TYPE, FUNCTOR, ACE_LOCK> &))
+ ACE_UNIMPLEMENTED_FUNC (void operator= (const ACE_Timer_Hash_Upcall<TYPE, FUNCTOR, ACE_LOCK> &))
+};
+
+/**
+ * @class ACE_Timer_Hash_Iterator_T
+ *
+ * @brief Iterates over an <ACE_Timer_Hash_T>.
+ *
+ * This is a generic iterator that can be used to visit every
+ * node of a timer queue. Be aware that it doesn't transverse
+ * in the order of timeout values.
+ */
+template <class TYPE, class FUNCTOR, class ACE_LOCK, class BUCKET>
+class ACE_Timer_Hash_Iterator_T : public ACE_Timer_Queue_Iterator_T <TYPE, FUNCTOR, ACE_LOCK>
+{
+public:
+ /// Constructor.
+ ACE_Timer_Hash_Iterator_T (ACE_Timer_Hash_T<TYPE, FUNCTOR, ACE_LOCK, BUCKET> &);
+
+ /// Positions the iterator at the earliest node in the Timer Queue
+ virtual void first (void);
+
+ /// Positions the iterator at the next node in the Timer Queue
+ virtual void next (void);
+
+ /// Returns true when there are no more nodes in the sequence
+ virtual int isdone (void) const;
+
+ /// Returns the node at the current position in the sequence
+ virtual ACE_Timer_Node_T<TYPE> *item (void);
+
+protected:
+ /// Pointer to the ACE_Timer_Hash that we are iterating over.
+ ACE_Timer_Hash_T<TYPE, FUNCTOR, ACE_LOCK, BUCKET> &timer_hash_;
+
+ /// Current position in <timer_hash_>'s table
+ size_t position_;
+
+ /// Current iterator used on <position>'s bucket
+ ACE_Timer_Queue_Iterator_T<TYPE, ACE_Timer_Hash_Upcall<TYPE, FUNCTOR, ACE_LOCK>, ACE_Null_Mutex> *iter_;
+};
+
+/**
+ * @class ACE_Timer_Hash_T
+ *
+ * @brief Provides a hash table of <BUCKET>s as an implementation for
+ * a timer queue.
+ *
+ * This implementation uses a hash table of BUCKETs. The hash
+ * is based on the time_value of the event. Unlike other Timer
+ * Queues, ACE_Timer_Hash does not expire events in order.
+ */
+template <class TYPE, class FUNCTOR, class ACE_LOCK, class BUCKET>
+class ACE_Timer_Hash_T : public ACE_Timer_Queue_T<TYPE, FUNCTOR, ACE_LOCK>
+{
+public:
+ /// Type of iterator
+ typedef ACE_Timer_Hash_Iterator_T<TYPE, FUNCTOR, ACE_LOCK, BUCKET>
+ HASH_ITERATOR;
+
+ /// Iterator is a friend
+ friend class ACE_Timer_Hash_Iterator_T<TYPE, FUNCTOR, ACE_LOCK, BUCKET>;
+
+ /// Type inherited from
+ typedef ACE_Timer_Queue_T<TYPE, FUNCTOR, ACE_LOCK> INHERITED;
+
+ // = Initialization and termination methods.
+ /**
+ * Default constructor. <table_size> determines the size of the
+ * hash table. <upcall_functor> is the instance of the FUNCTOR
+ * to be used by the buckets. If <upcall_functor> is 0, a default
+ * FUNCTOR will be created.
+ */
+ ACE_Timer_Hash_T (size_t table_size,
+ FUNCTOR *upcall_functor = 0,
+ ACE_Free_List<ACE_Timer_Node_T <TYPE> > *freelist = 0);
+
+ /**
+ * Default constructor. <upcall_functor> is the instance of the
+ * FUNCTOR to be used by the queue. If <upcall_functor> is 0, Timer
+ * Hash will create a default FUNCTOR. <freelist> the freelist of
+ * timer nodes. If 0, then a default freelist will be created. The default
+ * size will be ACE_DEFAULT_TIMERS and there will be no preallocation.
+ */
+ ACE_Timer_Hash_T (FUNCTOR *upcall_functor = 0, ACE_Free_List<ACE_Timer_Node_T <TYPE> > *freelist = 0);
+
+ /// Destructor
+ virtual ~ACE_Timer_Hash_T (void);
+
+ /// True if queue is empty, else false.
+ virtual int is_empty (void) const;
+
+ /// Returns the time of the earlier node in the <ACE_Timer_Hash>.
+ /// Must be called on a non-empty queue.
+ virtual const ACE_Time_Value &earliest_time (void) const;
+
+ /**
+ * Resets the interval of the timer represented by <timer_id> to
+ * <interval>, which is specified in relative time to the current
+ * <gettimeofday>. If <interval> is equal to
+ * <ACE_Time_Value::zero>, the timer will become a non-rescheduling
+ * timer. Returns 0 if successful, -1 if not.
+ */
+ virtual int reset_interval (long timer_id,
+ const ACE_Time_Value &interval);
+
+ /**
+ * Cancel all timer associated with <type>. If <dont_call> is 0
+ * then the <functor> will be invoked. Returns number of timers
+ * cancelled.
+ */
+ virtual int cancel (const TYPE &type,
+ int dont_call_handle_close = 1);
+
+ /**
+ * Cancel the single timer that matches the <timer_id> value (which
+ * was returned from the <schedule> method). If act is non-NULL
+ * then it will be set to point to the ``magic cookie'' argument
+ * passed in when the timer was registered. This makes it possible
+ * to free up the memory and avoid memory leaks. If <dont_call> is
+ * 0 then the <functor> will be invoked. Returns 1 if cancellation
+ * succeeded and 0 if the <timer_id> wasn't found.
+ */
+ virtual int cancel (long timer_id,
+ const void **act = 0,
+ int dont_call_handle_close = 1);
+
+ /**
+ * Run the <functor> for all timers whose values are <=
+ * <ACE_OS::gettimeofday>. Also accounts for <timer_skew>. Returns
+ * the number of timers canceled.
+ */
+ virtual int expire (void);
+
+ /**
+ * Run the <functor> for all timers whose values are <= <cur_time>.
+ * This does not account for <timer_skew>. Returns the number of
+ * timers canceled.
+ */
+ virtual int expire (const ACE_Time_Value &current_time);
+
+ /// Returns a pointer to this ACE_Timer_Queue's iterator.
+ virtual ACE_Timer_Queue_Iterator_T<TYPE, FUNCTOR, ACE_LOCK> &iter (void);
+
+ /// Removes the earliest node from the queue and returns it
+ virtual ACE_Timer_Node_T<TYPE> *remove_first (void);
+
+ /// Dump the state of an object.
+ virtual void dump (void) const;
+
+ /// Reads the earliest node from the queue and returns it.
+ virtual ACE_Timer_Node_T<TYPE> *get_first (void);
+
+private:
+
+ /**
+ * Schedule <type> that will expire at <future_time>,
+ * which is specified in absolute time. If it expires then <act> is
+ * passed in as the value to the <functor>. If <interval> is != to
+ * <ACE_Time_Value::zero> then it is used to reschedule the <type>
+ * automatically, using relative time to the current <gettimeofday>.
+ * This method returns a <timer_id> that is a pointer to a token
+ * which stores information about the event. This <timer_id> can be
+ * used to cancel the timer before it expires. Returns -1 on
+ * failure.
+ */
+ virtual long schedule_i (const TYPE &type,
+ const void *act,
+ const ACE_Time_Value &future_time,
+ const ACE_Time_Value &interval);
+
+ /// Non-locking version of dispatch_info ()
+ virtual int dispatch_info_i (const ACE_Time_Value &current_time,
+ ACE_Timer_Node_Dispatch_Info_T<TYPE> &info);
+
+ /// Reschedule an "interval" <ACE_Timer_Node>.
+ virtual void reschedule (ACE_Timer_Node_T<TYPE> *);
+
+ /// Finds the earliest node
+ void find_new_earliest (void);
+
+ /// Keeps track of the size of the queue
+ size_t size_;
+
+ /// Table of BUCKETS
+ BUCKET **table_;
+
+ /// Keeps track of the size of table_
+ size_t table_size_;
+
+ /// Functor used for the table's timer queues
+ ACE_Timer_Hash_Upcall<TYPE, FUNCTOR, ACE_LOCK> table_functor_;
+
+ /// Index to the position with the earliest entry
+ size_t earliest_position_;
+
+ /// Iterator used to expire timers.
+ HASH_ITERATOR *iterator_;
+
+#if defined (ACE_WIN64)
+ // Part of a hack... see comments in schedule().
+ // This is, essentially, the upper 32 bits of a 64-bit pointer on Win64.
+ ptrdiff_t pointer_base_;
+#endif
+
+ // = Don't allow these operations for now.
+ ACE_UNIMPLEMENTED_FUNC (ACE_Timer_Hash_T (const ACE_Timer_Hash_T<TYPE, FUNCTOR, ACE_LOCK, BUCKET> &))
+ ACE_UNIMPLEMENTED_FUNC (void operator= (const ACE_Timer_Hash_T<TYPE, FUNCTOR, ACE_LOCK, BUCKET> &))
+};
+
+ACE_END_VERSIONED_NAMESPACE_DECL
+
+#if defined (ACE_TEMPLATES_REQUIRE_SOURCE) && !defined(ACE_HAS_BROKEN_HPUX_TEMPLATES)
+#include "ace/Timer_Hash_T.cpp"
+#endif /* ACE_TEMPLATES_REQUIRE_SOURCE && !ACE_HAS_BROKEN_HPUX_TEMPLATES */
+
+#if defined (ACE_TEMPLATES_REQUIRE_PRAGMA)
+#pragma implementation ("Timer_Hash_T.cpp")
+#endif /* ACE_TEMPLATES_REQUIRE_PRAGMA */
+
+#include /**/ "ace/post.h"
+#endif /* ACE_TIMER_HASH_T_H */