stasis-aries-wal/lladd/operations/pageOperations.h

/*---
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---*/

/**
 * @file 
 *
 * Provides raw access to entire pages.
 *
 * LLADD's pages are PAGE_SIZE bytes long.  Currently, two integers are 
 * reserved for the LSN and the page type. providing PAGE_SIZE-8 bytes 
 * of usable space.
 *
 * @ingroup OPERATIONS
 *
 * @see page.h
 *
 * $Id$
 */ 


#ifndef __PAGE_OPERATIONS_H__
#define __PAGE_OPERATIONS_H__

/** If defined, then pageOperations.h will reuse freed pages.
    Unfortunately, the current support is not safe for programs with
    multiple concurrent transactions. */
/*#define REUSE_PAGES */

compensated_function int TpageAlloc(int xid/*, int type*/);
compensated_function recordid TfixedPageAlloc(int xid, int size);
compensated_function int TpageAllocMany(int xid, int count/*, int type*/);
compensated_function int TpageDealloc(int xid, int pageid);
compensated_function int TpageSet(int xid, int pageid, byte* dat);
compensated_function int TpageGet(int xid, int pageid, byte* buf);
/*Operation getPageAlloc();
  Operation getPageDealloc(); */
Operation getPageSet();

Operation getFixedPageAlloc();

Operation getUpdateFreespace();
Operation getUpdateFreespaceInverse();
Operation getUpdateFreelist();
Operation getUpdateFreelistInverse();
Operation getFreePageOperation();
Operation getAllocFreedPage();
Operation getUnallocFreedPage();
compensated_function void pageOperationsInit();
#endif