swap.cpp File Reference

#include "global.h"
#include <string.h>
#include "object.h"
#include "output_file.h"
#include "sproto.h"
#include "stats.h"

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Functions
void	check_active_maps (void)
	Finds maps in memory to swap. More...
void	flush_old_maps (void)
	Reset maps that need to, remove their swap file. More...
bool	map_can_reset (const mapstruct *map, long current_time)
	Returns whether a map can be reset, including all other maps in the same reset group. More...
static bool	map_can_reset_no_group (const mapstruct *map, long current_time)
	Returns whether a map can be reset, without taking its reset group into account. More...
int	players_on_map (mapstruct *m, int show_all)
	Returns the count of players on a map, calculated from player list. More...
void	read_map_log (void)
	Reads temporary maps information from disk. More...
int	swap_map (mapstruct *map)
	Swaps a map to disk. More...
static void	write_map_log (void)
	Writes out information on all the temporary maps. More...

Detailed Description

Functions that deal with swapping maps to disk to reclaim memory.

Definition in file swap.cpp.

Function Documentation

check_active_maps()

void check_active_maps

(

void

)

Finds maps in memory to swap.

Definition at line 201 of file swap.cpp.

References first_map, mapstruct::in_memory, MAP_IN_MEMORY, mapstruct::next, swap_map(), and mapstruct::timeout.

Referenced by server_main().

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flush_old_maps()

void flush_old_maps

(

void

)

Reset maps that need to, remove their swap file.

This is very useful if the tmp-disk is very full.

Definition at line 291 of file swap.cpp.

References clean_tmp_map(), delete_map(), EVENT_MAPRESET, events_execute_global_event(), first_map, llevDebug, LOG(), m, map_can_reset(), MAP_IN_MEMORY, MAP_SWAPPED, players_on_map(), seconds(), set_map_timeout(), and TRUE.

Referenced by command_reset(), and do_specials().

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map_can_reset()

bool map_can_reset	(	const mapstruct *	map,
		long	current_time
	)

Returns whether a map can be reset, including all other maps in the same reset group.

Parameters

map	map to consider.
current_time	current time.

Returns

false if the map can't be reset, true if the map can be reset.

Definition at line 266 of file swap.cpp.

References first_map, map_can_reset_no_group(), mapstruct::next, and mapstruct::reset_group.

Referenced by flush_old_maps().

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map_can_reset_no_group()

static bool map_can_reset_no_group ( const mapstruct *  map, long  current_time  )

static

Returns whether a map can be reset, without taking its reset group into account.

Parameters

map	map to consider.
current_time	current time.

Returns

false if the map can't be reset, true if the map can be reset.

Definition at line 253 of file swap.cpp.

References mapstruct::in_memory, MAP_SWAPPED, mapstruct::reset_time, and mapstruct::tmpname.

Referenced by map_can_reset().

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players_on_map()

int players_on_map	(	mapstruct *	m,
		int	show_all
	)

Returns the count of players on a map, calculated from player list.

Parameters

m	map we want the count of players on.
show_all	if true, show everyone. If not, don't show hidden players (dms)

Returns

player count.

Todo:

this doesn't take into account transports. Should be removed when mapstruct::players is valid.

Definition at line 234 of file swap.cpp.

References first_player, FLAG_REMOVED, m, object::map, object::next, unpaid_count::pl, and QUERY_FLAG.

Referenced by flush_old_maps().

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read_map_log()

void read_map_log

(

void

)

Reads temporary maps information from disk.

Will LOG() in case of error.

Definition at line 71 of file swap.cpp.

References buf, mapstruct::darkness, mapstruct::difficulty, get_linked_map(), mapstruct::in_memory, llevDebug, Settings::localdir, LOG(), MAP_MAXRESET, MAP_SWAPPED, MAX_BUF, mapstruct::path, mapstruct::reset_time, safe_strncpy, seconds(), settings, split_string(), strdup_local, mapstruct::timeout, and mapstruct::tmpname.

Referenced by init().

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swap_map()

int swap_map

(

mapstruct *

map

)

Swaps a map to disk.

After calling this function, the map will be:

• swapped to disk
• kept in memory in case of save error

Parameters

map	map to swap.

Returns

one of SAVE_ERROR_xxx.

Definition at line 136 of file swap.cpp.

References delete_map(), draw_ext_info_format(), EVENT_MAPRESET, events_execute_global_event(), first_player, mapstruct::fixed_resettime, FLAG_REMOVED, free_map(), mapstruct::in_memory, llevDebug, llevError, LOG(), object::map, MAP_IN_MEMORY, maps_swapped_total, MSG_TYPE_ADMIN, MSG_TYPE_ADMIN_LOADSAVE, NDI_ALL_DMS, NDI_RED, NDI_UNIQUE, object::next, mapstruct::next, mapstruct::path, pets_attempt_follow(), unpaid_count::pl, QUERY_FLAG, Settings::recycle_tmp_maps, mapstruct::reset_group, mapstruct::reset_time, rndm(), SAVE_ERROR_NOT_IN_MEMORY, SAVE_ERROR_OK, SAVE_ERROR_PLAYER, save_map(), SAVE_MODE_NORMAL, seconds(), set_map_reset_time(), settings, mapstruct::timeout, TRUE, and write_map_log().

Referenced by check_active_maps(), clean_tmp_files(), and command_reset().

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write_map_log()

static void write_map_log ( void  )

static

Writes out information on all the temporary maps.

It is called by swap_map().

Will LOG() in case of error.

Definition at line 34 of file swap.cpp.

References buf, mapstruct::darkness, mapstruct::difficulty, first_map, mapstruct::in_memory, Settings::localdir, MAP_IN_MEMORY, MAX_BUF, mapstruct::next, of_close(), of_open(), mapstruct::path, mapstruct::reset_time, settings, time, and mapstruct::tmpname.

Referenced by swap_map().

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