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src/misc/mem/mem2.h

+/**CFile****************************************************************
+
+  FileName    [mem2.h]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Memory management.]
+
+  Synopsis    [External declarations.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - June 20, 2005.]
+
+  Revision    [$Id: mem2.h,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#ifndef ABC__aig__mem__mem2_h
+#define ABC__aig__mem__mem2_h
+
+#include "misc/vec/vec.h"
+
+ABC_NAMESPACE_HEADER_START
+
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+typedef struct Mmr_Flex_t_     Mmr_Flex_t;     
+typedef struct Mmr_Fixed_t_    Mmr_Fixed_t;    
+typedef struct Mmr_Step_t_     Mmr_Step_t;     
+
+struct Mmr_Flex_t_
+{
+    int           nPageBase;     // log2 page size in words
+    int           PageMask;      // page mask
+    int           nEntries;      // entries allocated
+    int           iNext;         // next word to be used
+    Vec_Ptr_t     vPages;        // memory pages
+};
+
+struct Mmr_Fixed_t_
+{
+    int           nPageBase;     // log2 page size in words
+    int           PageMask;      // page mask
+    int           nEntryWords;   // entry size in words
+    int           nEntries;      // entries allocated
+    Vec_Ptr_t     vPages;        // memory pages
+    Vec_Int_t     vFrees;        // free entries
+};
+
+struct Mmr_Step_t_
+{
+    Vec_Ptr_t     vLarge;        // memory pages
+    int           nMems;         // the number of fixed memory managers employed
+    Mmr_Fixed_t * pMems[0];      // memory managers: 2^1 words, 2^2 words, etc
+};
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+ 
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline Mmr_Flex_t * Mmr_FlexStart( int nPageBase )
+{
+    Mmr_Flex_t * p;
+    p = ABC_CALLOC( Mmr_Flex_t, 1 );
+    p->nPageBase = nPageBase;
+    p->PageMask  = (1 << nPageBase) - 1;
+    p->iNext     = (1 << nPageBase);
+    return p;
+}
+static inline void Mmr_FlexStop( Mmr_Flex_t * p )
+{
+    word * pPage;
+    int i;
+    if ( 1 )
+        printf( "Using %d pages of %d words each. Total memory %.2f MB.\n", 
+            Vec_PtrSize(&p->vPages), 1 << p->nPageBase, 
+            1.0 * Vec_PtrSize(&p->vPages) * (1 << p->nPageBase) * 8 / (1 << 20) );
+    Vec_PtrForEachEntry( word *, &p->vPages, pPage, i )
+        ABC_FREE( pPage );
+    ABC_FREE( p->vPages.pArray );
+    ABC_FREE( p );
+}
+static inline word * Mmr_FlexEntry( Mmr_Flex_t * p, int h )
+{
+    assert( h > 0 && h < p->iNext );
+    return (word *)Vec_PtrEntry(&p->vPages, (h >> p->nPageBase)) + (h & p->PageMask);
+}
+static inline int Mmr_FlexFetch( Mmr_Flex_t * p, int nWords )
+{
+    int hEntry;
+    assert( nWords > 0 && nWords < p->PageMask );
+    if ( p->iNext + nWords >= p->PageMask )
+    {
+        Vec_PtrPush( &p->vPages, ABC_FALLOC( word, p->PageMask + 1 ) );
+        p->iNext = 1;
+    }
+    hEntry = ((Vec_PtrSize(&p->vPages) - 1) << p->nPageBase) | p->iNext;
+    p->iNext += nWords;
+    p->nEntries++;
+    return hEntry;
+}
+static inline void Mmr_FlexRelease( Mmr_Flex_t * p, int h )
+{
+    assert( h > 0 && h < p->iNext );
+    if ( (h >> p->nPageBase) && Vec_PtrEntry(&p->vPages, (h >> p->nPageBase) - 1) )
+    {
+        word * pPage = (word *)Vec_PtrEntry(&p->vPages, (h >> p->nPageBase) - 1);
+        Vec_PtrWriteEntry( &p->vPages, (h >> p->nPageBase) - 1, NULL );
+        ABC_FREE( pPage );
+    }
+}
+
+ 
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline Mmr_Fixed_t * Mmr_FixedStart( int nPageBase, int nEntryWords )
+{
+    Mmr_Fixed_t * p;
+    assert( nEntryWords > 0 && nEntryWords < (1 << nPageBase) );
+    p = ABC_CALLOC( Mmr_Fixed_t, 1 );
+    p->nPageBase   = nPageBase;
+    p->PageMask    = (1 << nPageBase) - 1;
+    p->nEntryWords = nEntryWords;
+    return p;
+}
+static inline void Mmr_FixedStop( Mmr_Fixed_t * p )
+{
+    word * pPage;
+    int i;
+    if ( 1 )
+        printf( "Using %d pages of %d words each. Total memory %.2f MB.\n", 
+            Vec_PtrSize(&p->vPages), 1 << p->nPageBase, 
+            1.0 * Vec_PtrSize(&p->vPages) * (1 << p->nPageBase) * 8 / (1 << 20) );
+    Vec_PtrForEachEntry( word *, &p->vPages, pPage, i )
+        ABC_FREE( pPage );
+    ABC_FREE( p->vPages.pArray );
+    ABC_FREE( p->vFrees.pArray );
+    ABC_FREE( p );
+}
+static inline word * Mmr_FixedEntry( Mmr_Fixed_t * p, int h )
+{
+    assert( h > 0 && h < ((Vec_PtrSize(&p->vPages) - 1) << p->nPageBase) );
+    return (word *)Vec_PtrEntry(&p->vPages, (h >> p->nPageBase)) + (h & p->PageMask);
+}
+static inline int Mmr_FixedFetch( Mmr_Fixed_t * p )
+{
+    if ( Vec_IntSize(&p->vFrees) == 0 )
+    {
+        int i, hEntry = Vec_PtrSize(&p->vPages) << p->nPageBase;
+        Vec_PtrPush( &p->vPages, ABC_FALLOC( word, p->PageMask + 1 ) );
+        for ( i = 1; i + p->nEntryWords <= p->PageMask; i += p->nEntryWords )
+            Vec_IntPush( &p->vFrees, hEntry | i );
+        Vec_IntReverseOrder( &p->vFrees );
+    }
+    p->nEntries++;
+    return Vec_IntPop( &p->vFrees );
+}
+static inline void Mmr_FixedRecycle( Mmr_Fixed_t * p, int h )
+{
+    memset( Mmr_FixedEntry(p, h), 0xFF, sizeof(word) * p->nEntryWords );
+    Vec_IntPush( &p->vFrees, h );
+}
+
+ 
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline Mmr_Step_t * Mmr_StepStart( int nWordsMax )
+{
+    char * pMemory = ABC_CALLOC( char, sizeof(Mmr_Step_t) + sizeof(void *) * (nWordsMax + 1) );
+    Mmr_Step_t * p = (Mmr_Step_t *)pMemory;
+    p->nMems = nWordsMax + 1;
+    return p;
+}
+static inline void Mmr_StepStop( Mmr_Step_t * p )
+{
+    word * pPage;
+    int i;
+    Vec_PtrForEachEntry( word *, &p->vLarge, pPage, i )
+        ABC_FREE( pPage );
+    ABC_FREE( p->vLarge.pArray );
+    ABC_FREE( p );
+}
+static inline word * Mmr_StepEntry( Mmr_Step_t * p, int nWords, int h )
+{
+    if ( nWords < p->nMems )
+        return Mmr_FixedEntry( p->pMems[nWords], h );
+    return (word *)Vec_PtrEntry(&p->vLarge, h);
+}
+static inline int Mmr_StepFetch( Mmr_Step_t * p, int nWords )
+{
+    if ( nWords < p->nMems )
+        return Mmr_FixedFetch( p->pMems[nWords] );
+    Vec_PtrPush( &p->vLarge, ABC_FALLOC( word, nWords ) );
+    return Vec_PtrSize( &p->vLarge ) - 1;
+}
+static inline void Mmr_StepRecycle( Mmr_Step_t * p, int nWords, int h )
+{
+    void * pPage;
+    if ( nWords < p->nMems )
+    {
+        Mmr_FixedRecycle( p->pMems[nWords], h );
+        return;
+    }
+    pPage = Vec_PtrEntry( &p->vLarge, h );
+    ABC_FREE( pPage );
+    Vec_PtrWriteEntry( &p->vLarge, h, NULL );
+}
+
+
+ABC_NAMESPACE_HEADER_END
+
+#endif
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+