/
rangemap.cc
113 lines (97 loc) · 3.28 KB
/
rangemap.cc
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% Memory management: range map
%%% see associated .ch file for more info.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%[8
#include "../../rts.h"
%%]
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% Range Map
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%[8
MM_RangeMap* mm_rangeMap_New( MM_Malloc* memmgt, MM_RangeMap* a ) {
if ( a == NULL ) {
a = (MM_RangeMap*) memmgt->malloc( sizeof( MM_RangeMap ) ) ;
a->didAlcDescr = True ;
} else {
a->didAlcDescr = False ;
}
a->ptr = NULL ;
a->didAlcPtr = False ;
a->firstInx = 0 ;
a->size = 0 ;
a->memMgt = memmgt ;
return a;
// mm_rangeMap_Realloc( a, NULL, firstInx, aftLastInx ) ;
}
void mm_rangeMap_Free( MM_RangeMap* a ) {
if ( a->didAlcPtr ) {
a->memMgt->free( a->ptr ) ;
}
if ( a->didAlcDescr ) {
a->memMgt->free( a ) ;
}
}
// assume this does not happen too often, so allocate exactly what is asked for
// assume it only grows
void mm_rangeMap_Realloc( MM_RangeMap* a, WPtr ptr, MM_RangeMap_Inx firstInx, MM_RangeMap_Inx aftLastInx ) {
// IF_GB_TR_ON(3,{printf("mm_rangeMap_Realloc a=%p p=%p firstInx=%x aftLastInx=%x a->firstInx=%x a->size=%x\n", a, a->ptr, firstInx, aftLastInx, a->firstInx, a->size);}) ;
if ( a->firstInx == 0 ) {
a->firstInx = firstInx ;
} else {
firstInx = minWord( a->firstInx, firstInx ) ;
}
aftLastInx = maxWord( aftLastInx, a->firstInx + a->size ) ;
MM_RangeMap_Inx szNew = aftLastInx - firstInx ;
if ( szNew > a->size || ptr != NULL ) {
WPtr ptrNew ;
Word szNewBytes = szNew << Word_SizeInBytes_Log ;
Bool didAlcPtrNew ;
// if given a ptr, use that one
if ( ptr == NULL ) {
ptrNew = a->memMgt->malloc( szNewBytes ) ;
didAlcPtrNew = True ;
} else {
ptrNew = ptr ;
didAlcPtrNew = False ;
}
// init & copy old values
int i ;
for ( i = firstInx ; i < a->firstInx ; i++ ) {
ptrNew[ i - firstInx ] = 0 ;
}
for ( i = a->firstInx ; i < (a->size + a->firstInx) ; i++ ) {
ptrNew[ i - firstInx ] = a->ptr[ i - a->firstInx ] ;
}
for ( i = a->size + a->firstInx ; i < aftLastInx ; i++ ) {
ptrNew[ i - firstInx ] = 0 ;
}
// deallocate old, assign new
if ( a->didAlcPtr ) {
a->memMgt->free( a->ptr ) ;
}
a->ptr = ptrNew ;
a->didAlcPtr = didAlcPtrNew ;
// set new size & first inx
a->firstInx = firstInx ;
a->size = szNew ;
// IF_GB_TR_ON(3,{printf("mm_rangeMap_Realloc a=%p p=%p firstInx=%x aftLastInx=%x a->firstInx=%x a->size=%x\n", a, a->ptr, firstInx, aftLastInx, a->firstInx, a->size);}) ;
// IF_GB_TR_ON(3,{printf("mm_rangeMap_Realloc szNew=%x szNewBytes=%x\n", szNew, szNewBytes);}) ;
}
}
%%]
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% Dump
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%[8
#ifdef TRACE
void mm_rangeMap_Dump( MM_RangeMap* a ) {
printf( ">------------------------> RangeMap\n" ) ;
int i ;
for ( i = mm_rangeMap_FirstInx(a) ; i < mm_rangeMap_AfterLastInx(a) ; i++ ) {
printf( " Rng %x: val=%x\n", i, *mm_rangeMap_At(a,i) ) ;
}
printf( "<------------------------< RangeMap\n" ) ;
}
#endif
%%]