void
mmc_cleanup( struct timeval* nowP )
{
time_t now;
Map** mm;
Map* m;
/* Get current time, if necessary. */
if ( nowP != (struct timeval*) 0 )
now = nowP->tv_sec;
else
now = time( (time_t*) 0 );
/* Really unmap any unreferenced entries older than the limit. */
for ( mm = &maps; *mm != (Map*) 0; )
{
m = *mm;
if ( m->refcount == 0 && now - m->reftime >= EXPIRE_AGE )
really_unmap( mm );
else
mm = &(*mm)->next;
}
/* Really free excess blocks on the free list. */
while ( free_count > DESIRED_FREE_COUNT )
{
m = free_maps;
free_maps = m->next;
--free_count;
free( (void*) m );
}
}
void
mmc_destroy( void )
{
Map* m;
while ( maps != (Map*) 0 )
really_unmap( &maps );
while ( free_maps != (Map*) 0 )
{
m = free_maps;
free_maps = m->next;
--free_count;
free( (void*) m );
}
}
void
mmc_term( void )
{
Map* m;
while ( maps != (Map*) 0 )
really_unmap( &maps );
while ( free_maps != (Map*) 0 )
{
m = free_maps;
free_maps = m->next;
--free_count;
free( (void*) m );
--alloc_count;
}
}
static void
panic( void )
{
Map** mm;
Map* m;
syslog( LOG_ERR, "mmc panic - freeing all unreferenced maps" );
/* Really unmap all unreferenced entries. */
for ( mm = &maps; *mm != (Map*) 0; )
{
m = *mm;
if ( m->refcount == 0 )
really_unmap( mm );
else
mm = &(*mm)->next;
}
}
void
mmc_cleanup( struct timeval* nowP )
{
time_t now;
Map** mm;
Map* m;
/* Get the current time, if necessary. */
if ( nowP != (struct timeval*) 0 )
now = nowP->tv_sec;
else
now = time( (time_t*) 0 );
/* Really unmap any unreferenced entries older than the age limit. */
for ( mm = &maps; *mm != (Map*) 0; )
{
m = *mm;
if ( m->refcount == 0 && now - m->reftime >= expire_age )
really_unmap( mm );
else
mm = &(*mm)->next;
}
/* Adjust the age limit if there are too many bytes mapped, or
** too many or too few files mapped.
*/
if ( mapped_bytes > DESIRED_MAX_MAPPED_BYTES )
expire_age = MAX( ( expire_age * 2 ) / 3, DEFAULT_EXPIRE_AGE / 10 );
else if ( map_count > DESIRED_MAX_MAPPED_FILES )
expire_age = MAX( ( expire_age * 2 ) / 3, DEFAULT_EXPIRE_AGE / 10 );
else if ( map_count < DESIRED_MAX_MAPPED_FILES / 2 )
expire_age = MIN( ( expire_age * 5 ) / 4, DEFAULT_EXPIRE_AGE * 3 );
/* Really free excess blocks on the free list. */
while ( free_count > DESIRED_FREE_COUNT )
{
m = free_maps;
free_maps = m->next;
--free_count;
free( (void*) m );
--alloc_count;
}
}
