stasis-aries-wal/stasis/truncation.h

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/**
 * @file
 *
 * Implementation of log truncation for lladd.
 * 
 * @todo TRUNCATE_INTERVAL should be dynamically set...
 * @todo log truncation policy should be set of the percentage of the log that can be truncated
 * (instead of by absolute logfile size)
 * @todo avoid copying the non-truncated tail of the log each time truncation occurs.
 * 
 * $Id$
 * 
 */

#include <stasis/transactional.h>

BEGIN_C_DECLS

#ifndef __LLADD_TRUNCATION_H
#define __LLADD_TRUNCATION_H 1

#include <stasis/logger/logger2.h>

void dirtyPagesInit();
void dirtyPagesDeinit();

void dirtyPages_add(Page * p); 
void dirtyPages_remove(Page * p);
int  dirtyPages_isDirty(Page * p);

/**
   @todo flushRange's API sucks.  It should be two functions, "startRangeFlush" and "waitRangeFlushes" or something.
   @todo flushRange has nothing to do with the dirty pages api, or truncation.
 */
void dirtyPages_flushRange(pageid_t start, pageid_t stop);

void stasis_truncation_init();
void stasis_truncation_deinit();

/**
   Spawn a periodic, demand-based log truncation thread.
*/
void stasis_truncation_thread_start();
/**
   Initiate a round of log truncation.
*/
int stasis_truncation_truncate(stasis_log_t* log, int force);

END_C_DECLS
#endif