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65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
/**************************************************************************/
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/* File: optmem.cc */
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/* Author: Joachim Schoeberl */
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/* Date: 04. Apr. 97 */
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/**************************************************************************/
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/*
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Abstract data type ARRAY
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*/
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#include <mystdlib.h>
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#include <myadt.hpp>
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namespace netgen
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{
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//using namespace netgen;
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BlockAllocator :: BlockAllocator (unsigned asize, unsigned ablocks)
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: bablocks (0)
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{
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if (asize < sizeof(void*))
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asize = sizeof(void*);
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size = asize;
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blocks = ablocks;
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freelist = NULL;
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}
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BlockAllocator :: ~BlockAllocator ()
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{
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//for (unsigned i = 0; i < bablocks.Size(); i++)
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for (int i = 0; i < bablocks.Size(); i++)
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delete [] bablocks[i];
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}
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void * BlockAllocator :: Alloc ()
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{
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// return new char[size];
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if (!freelist)
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{
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// cout << "freelist = " << freelist << endl;
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// cout << "BlockAlloc: " << size*blocks << endl;
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char * hcp = new char [size * blocks];
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bablocks.Append (hcp);
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bablocks.Last() = hcp;
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for (unsigned i = 0; i < blocks-1; i++)
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*(void**)&(hcp[i * size]) = &(hcp[ (i+1) * size]);
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*(void**)&(hcp[(blocks-1)*size]) = NULL;
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freelist = hcp;
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}
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void * p = freelist;
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freelist = *(void**)freelist;
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return p;
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}
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/*
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void BlockAllocator :: Free (void * p)
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{
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*(void**)p = freelist;
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freelist = p;
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}
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*/
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}
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