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177 lines
5.3 KiB
177 lines
5.3 KiB
#ifndef _SMP_HEAP_HPP_
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#define _SMP_HEAP_HPP_
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// Ruler
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// 1 2 3 4 5 6 7 8
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//345678901234567890123456789012345678901234567890123456789012345678901234567890
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/********************************************************************/
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/* */
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/* The standard layout. */
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/* */
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/* The standard layout for 'hpp' files for this code is as */
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/* follows: */
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/* */
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/* 1. Include files. */
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/* 2. Constants exported from the class. */
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/* 3. Data structures exported from the class. */
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/* 4. Forward references to other data structures. */
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/* 5. Class specifications (including inline functions). */
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/* 6. Additional large inline functions. */
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/* */
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/* Any portion that is not required is simply omitted. */
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/* */
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/********************************************************************/
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#include "Rockall.hpp"
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/********************************************************************/
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/* */
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/* Class forward references. */
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/* */
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/* We need to refer to the following classes before they are */
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/* fully specified so here we list them as forward references. */
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/* */
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/********************************************************************/
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class LIST;
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class THREAD_LOCAL_STORE;
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struct CACHE_STACK;
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struct THREAD_CACHE;
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/********************************************************************/
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/* */
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/* A SMP heap. */
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/* */
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/* A SMP heap is optimized for SMP performance. Each thread */
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/* is given its own private cache of memory allocations which */
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/* it can access without claiming a lock. */
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/* */
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/********************************************************************/
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class ROCKALL_DLL_LINKAGE SMP_HEAP : public ROCKALL
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{
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//
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// Private data.
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//
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bool Active;
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int MaxCaches1;
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int MaxCaches2;
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int MaxSize1;
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int MaxSize2;
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int ShiftSize1;
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int ShiftSize2;
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LIST *ActiveList;
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LIST *FreeList;
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THREAD_LOCAL_STORE *Tls;
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public:
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//
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// Public functions.
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//
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SMP_HEAP
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(
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int MaxFreeSpace = 4194304,
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bool Recycle = true,
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bool SingleImage = false,
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bool ThreadSafe = true
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);
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//
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// Manipulate allocations.
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//
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// The first group of functions manipulate
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// single or small arrays of allocations.
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//
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virtual bool Delete
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(
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void *Address,
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int Size = NoSize
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);
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virtual void *New
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(
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int Size,
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int *Space = NULL,
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bool Zero = false
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);
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virtual bool Verify
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(
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void *Address = NULL,
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int *Space = NULL
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);
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//
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// Manipulate the heap.
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//
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// The second group of functions act upon a heap
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// as a whole.
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//
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virtual void DeleteAll( bool Recycle = true );
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virtual bool Truncate( int MaxFreeSpace = 0 );
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virtual bool Walk
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(
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bool *Active,
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void **Address,
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int *Space
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);
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~SMP_HEAP( void );
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private:
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//
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// Private functions.
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//
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void CreateThreadCache( void );
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void ActivateCacheStack( CACHE_STACK *CacheStack );
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CACHE_STACK *FindCache
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(
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int Size,
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THREAD_CACHE *ThreadCache
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);
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void FlushAllThreadCaches( void );
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void FlushThreadCache( THREAD_CACHE *ThreadCache );
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void FlushCacheStack( CACHE_STACK *CacheStack );
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bool SearchAllThreadCaches
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(
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void *Address,
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int Size
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);
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bool SearchThreadCache
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(
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void *Address,
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int Size,
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THREAD_CACHE *ThreadCache
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);
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bool SearchCacheStack
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(
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void *Address,
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CACHE_STACK *CacheStack
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);
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void DeleteThreadCache( void );
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//
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// Disabled operations.
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//
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// All copy constructors and class assignment
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// operations are disabled.
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//
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SMP_HEAP( const SMP_HEAP & Copy );
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void operator=( const SMP_HEAP & Copy );
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};
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#endif
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