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-rw-r--r--ace/Free_List.h144
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diff --git a/ace/Free_List.h b/ace/Free_List.h
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-/* -*- C++ -*- */
-// $Id$
-
-
-// ============================================================================
-//
-// = LIBRARY
-// ace
-//
-// = FILENAME
-// Free_List.h
-//
-// = AUTHOR
-// Darrell Brunsch (brunsch@cs.wustl.edu)
-//
-// ============================================================================
-
-#ifndef ACE_FREE_LIST_H
-#define ACE_FREE_LIST_H
-
-#include "ace/OS.h"
-
-#if !defined (ACE_LACKS_PRAGMA_ONCE)
-# pragma once
-#endif /* ACE_LACKS_PRAGMA_ONCE */
-
-#include "ace/Synch_T.h"
-
-template <class T>
-class ACE_Free_List
-{
- // = TITLE
- // Implements a free list.
- //
- // = DESCRIPTION
- // This class maintains a free list of nodes of type T.
-public:
- virtual ~ACE_Free_List (void);
- // Destructor - removes all the elements from the free_list.
-
- virtual void add (T *element) = 0;
- // Inserts an element onto the free list (if it isn't past the high
- // water mark).
-
- virtual T *remove (void) = 0;
- // Takes a element off the freelist and returns it. It creates
- // <inc> new elements if the size is at or below the low water mark.
-
- virtual size_t size (void) = 0;
- // Returns the current size of the free list.
-
- virtual void resize (size_t newsize) = 0;
- // Resizes the free list to <newsize>.
-};
-
-template <class T, class ACE_LOCK>
-class ACE_Locked_Free_List : public ACE_Free_List<T>
-{
- // = TITLE
- // Implements a free list.
- //
- // = DESCRIPTION
- // This class maintains a free list of nodes of type T. It depends on
- // the type T having a get_next () and set_next () method. It maintains
- // a mutex so the freelist can be used in a multithreaded program .
-public:
- // = Initialization and termination.
- ACE_Locked_Free_List (int mode = ACE_FREE_LIST_WITH_POOL,
- size_t prealloc = ACE_DEFAULT_FREE_LIST_PREALLOC,
- size_t lwm = ACE_DEFAULT_FREE_LIST_LWM,
- size_t hwm = ACE_DEFAULT_FREE_LIST_HWM,
- size_t inc = ACE_DEFAULT_FREE_LIST_INC);
- // Constructor takes a <mode> (i.e., ACE_FREE_LIST_WITH_POOL or
- // ACE_PURE_FREE_LIST), a count of the number of nodes to
- // <prealloc>, a low and high water mark (<lwm> and <hwm>) that
- // indicate when to allocate more nodes, an increment value (<inc>)
- // that indicates how many nodes to allocate when the list must
- // grow.
-
- virtual ~ACE_Locked_Free_List (void);
- // Destructor - removes all the elements from the free_list.
-
- virtual void add (T *element);
- // Inserts an element onto the free list (if it isn't past the high
- // water mark).
-
- virtual T *remove (void);
- // Takes a element off the freelist and returns it. It creates
- // <inc> new elements if the size is at or below the low water mark.
-
- virtual size_t size (void);
- // Returns the current size of the free list.
-
- virtual void resize (size_t newsize);
- // Resizes the free list to <newsize>.
-
-protected:
- virtual void alloc (size_t n);
- // Allocates <n> extra nodes for the freelist.
-
- virtual void dealloc (size_t n);
- // Removes and frees <n> nodes from the freelist.
-
- int mode_;
- // Free list operation mode, either ACE_FREE_LIST_WITH_POOL or
- // ACE_PURE_FREE_LIST.
-
- T *free_list_;
- // Pointer to the first node in the freelist.
-
- size_t lwm_;
- // Low water mark.
-
- size_t hwm_;
- // High water mark.
-
- size_t inc_;
- // Increment value.
-
- size_t size_;
- // Keeps track of the size of the list.
-
- ACE_LOCK mutex_;
- // Synchronization variable for <ACE_Timer_Queue>.
-
-private:
- // = Don't allow these operations for now.
- ACE_UNIMPLEMENTED_FUNC (ACE_Locked_Free_List (const ACE_Locked_Free_List<T, ACE_LOCK> &))
- ACE_UNIMPLEMENTED_FUNC (void operator= (const ACE_Locked_Free_List<T, ACE_LOCK> &))
-};
-
-#if defined (__ACE_INLINE__)
-#include "ace/Free_List.i"
-#endif /* __ACE_INLINE__ */
-
-#if defined (ACE_TEMPLATES_REQUIRE_SOURCE)
-#include "ace/Free_List.cpp"
-#endif /* ACE_TEMPLATES_REQUIRE_SOURCE */
-
-#if defined (ACE_TEMPLATES_REQUIRE_PRAGMA)
-#pragma implementation ("Free_List.cpp")
-#endif /* ACE_TEMPLATES_REQUIRE_PRAGMA */
-
-#endif /* ACE_FREE_LIST_H */