Michael Phipps
cc22bcb449
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2074 a95241bf-73f2-0310-859d-f6bbb57e9c96
38 lines
977 B
C++
38 lines
977 B
C++
#include "vpagePool.h"
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#include "vmHeaderBlock.h"
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#include "pageManager.h"
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#include "vpage.h"
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extern vmHeaderBlock *vmBlock;
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vpage *poolvpage::get(void)
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{
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vpage *ret=NULL;
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if (unused.count())
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{
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//error ("poolvpage::get: Getting an unused one!\n");
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acquire_sem(inUse);
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ret=(vpage *)unused.next();
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release_sem(inUse);
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}
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if (ret)
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{
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//error ("poolvpage::get: Returning address:%x \n",ret);
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return ret;
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}
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else
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{
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page *newPage=vmBlock->pageMan->getPage();
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error ("poolvpage::get: Getting new page %lx!\n",newPage->getAddress());
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if (!newPage)
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throw ("Out of pages to allocate a pool!");
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int newCount=PAGE_SIZE/sizeof(vpage);
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acquire_sem(inUse);
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//error ("poolvpage::get: Adding %d new elements to the pool!\n",newCount);
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for (int i=0;i<newCount;i++)
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unused.add(((node *)(newPage->getAddress()+(i*sizeof(vpage)))));
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release_sem(inUse);
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return (get()); // A little cheat - call self again to get the first one from stack...
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}
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}
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