Runtime information about a script like a pointer to the squirrel vm and the current state. More...

#include <script_instance.hpp>

Inheritance diagram for ScriptInstance:

Public Types
typedef std::variant< SQInteger, std::string, SQBool, SQSaveLoadType >	ScriptDataVariant

typedef std::list< ScriptDataVariant >	ScriptData

Public Member Functions
	ScriptInstance (const char *APIName)
	Create a new script.

void	Initialize (const std::string &main_script, const std::string &instance_name, CompanyID company)
	Initialize the script and prepare it for its first run. More...

virtual int	GetSetting (const std::string &name)=0
	Get the value of a setting of the current instance. More...

virtual class ScriptInfo *	FindLibrary (const std::string &library, int version)=0
	Find a library. More...

void	Continue ()
	A script in multiplayer waits for the server to handle its DoCommand. More...

void	GameLoop ()
	Run the GameLoop of a script.

void	CollectGarbage ()
	Let the VM collect any garbage.

class ScriptStorage *	GetStorage ()
	Get the storage of this script.

ScriptLogTypes::LogData &	GetLogData ()
	Get the log pointer of this script.

class ScriptController *	GetController ()
	Get the controller attached to the instance.

bool	IsDead () const
	Return the "this script died" value.

bool	IsAlive () const
	Return whether the script is alive.

void	Save ()
	Call the script Save function and save all data in the savegame.

void	LoadOnStack (ScriptData *data)
	Store loaded data on the stack. More...

void	Pause ()
	Suspends the script for the current tick and then pause the execution of script. More...

bool	IsPaused ()
	Checks if the script is paused. More...

void	Unpause ()
	Resume execution of the script. More...

SQInteger	GetOpsTillSuspend ()
	Get the number of operations the script can execute before being suspended. More...

bool	DoCommandCallback (const CommandCost &result, const CommandDataBuffer &data, CommandDataBuffer result_data, Commands cmd)
	DoCommand callback function for all commands executed by scripts. More...

void	InsertEvent (class ScriptEvent *event)
	Insert an event for this script. More...

bool	IsSleeping ()
	Check if the instance is sleeping, which either happened because the script executed a DoCommand, executed this.Sleep() or it has been paused.

size_t	GetAllocatedMemory () const

bool	InShutdown () const
	Indicate whether this instance is currently being destroyed.

void	ReleaseSQObject (HSQOBJECT *obj)
	Decrease the ref count of a squirrel object. More...

Static Public Member Functions
static void	DoCommandReturn (ScriptInstance *instance)
	Return a true/false reply for a DoCommand.

static void	DoCommandReturnVehicleID (ScriptInstance *instance)
	Return a VehicleID reply for a DoCommand.

static void	DoCommandReturnSignID (ScriptInstance *instance)
	Return a SignID reply for a DoCommand.

static void	DoCommandReturnGroupID (ScriptInstance *instance)
	Return a GroupID reply for a DoCommand.

static void	DoCommandReturnGoalID (ScriptInstance *instance)
	Return a GoalID reply for a DoCommand.

static void	DoCommandReturnStoryPageID (ScriptInstance *instance)
	Return a StoryPageID reply for a DoCommand.

static void	DoCommandReturnStoryPageElementID (ScriptInstance *instance)
	Return a StoryPageElementID reply for a DoCommand.

static void	DoCommandReturnLeagueTableID (ScriptInstance *instance)
	Return a LeagueTableID reply for a DoCommand.

static void	DoCommandReturnLeagueTableElementID (ScriptInstance *instance)
	Return a LeagueTableElementID reply for a DoCommand.

static void	SaveEmpty ()
	Don't save any data in the savegame.

static ScriptData *	Load (int version)
	Load data from a savegame. More...

static void	LoadEmpty ()
	Load and discard data from a savegame.

Protected Member Functions
virtual void	RegisterAPI ()
	Register all API functions to the VM.

bool	LoadCompatibilityScripts (const std::string &api_version, Subdirectory dir)
	Load squirrel scripts to emulate an older API. More...

virtual void	Died ()
	Tell the script it died.

virtual CommandCallbackData *	GetDoCommandCallback ()=0
	Get the callback handling DoCommands in case of networking.

virtual void	LoadDummyScript ()=0
	Load the dummy script.

Protected Attributes
class Squirrel *	engine
	A wrapper around the squirrel vm.

std::string	versionAPI
	Current API used by this script.

Private Types
enum	SQSaveLoadType { SQSL_INT = 0x00, SQSL_STRING = 0x01, SQSL_ARRAY = 0x02, SQSL_TABLE = 0x03, SQSL_BOOL = 0x04, SQSL_NULL = 0x05, SQSL_ARRAY_TABLE_END = 0xFF }
	The type of the data that follows in the savegame. More...

Private Member Functions
bool	CallLoad ()
	Call the script Load function if it exists and data was loaded from a savegame.

Static Private Member Functions
static bool	SaveObject (HSQUIRRELVM vm, SQInteger index, int max_depth, bool test)
	Save one object (int / string / array / table) to the savegame. More...

static bool	LoadObjects (ScriptData *data)
	Load all objects from a savegame. More...

static bool	LoadObjects (HSQUIRRELVM vm, ScriptData *data)

Private Attributes
class ScriptController *	controller
	The script main class.

class ScriptStorage *	storage
	Some global information for each running script.

SQObject *	instance
	Squirrel-pointer to the script main class.

bool	is_started
	Is the scripts constructor executed?

bool	is_dead
	True if the script has been stopped.

bool	is_save_data_on_stack
	Is the save data still on the squirrel stack?

int	suspend
	The amount of ticks to suspend this script before it's allowed to continue.

bool	is_paused
	Is the script paused? (a paused script will not be executed until unpaused)

bool	in_shutdown
	Is this instance currently being destructed?

Script_SuspendCallbackProc *	callback
	Callback that should be called in the next tick the script runs.

size_t	last_allocated_memory
	Last known allocated memory value (for display for crashed scripts)

Friends
class	ScriptObject

class	ScriptController

Detailed Description

Runtime information about a script like a pointer to the squirrel vm and the current state.

Definition at line 25 of file script_instance.hpp.

Member Enumeration Documentation

◆ SQSaveLoadType

enum ScriptInstance::SQSaveLoadType

private

The type of the data that follows in the savegame.

Enumerator
SQSL_INT	The following data is an integer.
SQSL_STRING	The following data is an string.
SQSL_ARRAY	The following data is an array.
SQSL_TABLE	The following data is an table.
SQSL_BOOL	The following data is a boolean.
SQSL_NULL	A null variable.
SQSL_ARRAY_TABLE_END	Marks the end of an array or table, no data follows.

Definition at line 28 of file script_instance.hpp.

Member Function Documentation

◆ Continue()

void ScriptInstance::Continue ( )

A script in multiplayer waits for the server to handle its DoCommand.

It keeps waiting for this until this function is called.

Definition at line 150 of file script_instance.cpp.

References suspend.

◆ DoCommandCallback()

bool ScriptInstance::DoCommandCallback	(	const CommandCost &	result,
		const CommandDataBuffer &	data,
		CommandDataBuffer	result_data,
		Commands	cmd
	)

DoCommand callback function for all commands executed by scripts.

Parameters

result	The result of the command.
tile	The tile on which the command was executed.
data	Command data as given to DoCommandPInternal.
result_data	Extra data return from the command.
cmd	cmd as given to DoCommandPInternal.

Returns: true if we handled result.

Definition at line 754 of file script_instance.cpp.

◆ FindLibrary()

virtual class ScriptInfo* ScriptInstance::FindLibrary	(	const std::string &	library,
		int	version
	)

pure virtual

Find a library.

Parameters

library	The library name to find.
version	The version the library should have.

Returns: The library if found, nullptr otherwise.

Implemented in AIInstance, and GameInstance.

◆ GetOpsTillSuspend()

SQInteger ScriptInstance::GetOpsTillSuspend ( )

Get the number of operations the script can execute before being suspended.

This function is safe to call from within a function called by the script.

Returns: The number of operations to execute.

Definition at line 749 of file script_instance.cpp.

References engine, and Squirrel::GetOpsTillSuspend().

◆ GetSetting()

virtual int ScriptInstance::GetSetting ( const std::string & name )

pure virtual

Get the value of a setting of the current instance.

Parameters

name	The name of the setting.

Returns: the value for the setting, or -1 if the setting is not known.

Implemented in AIInstance, and GameInstance.

◆ Initialize()

void ScriptInstance::Initialize	(	const std::string &	main_script,
		const std::string &	instance_name,
		CompanyID	company
	)

Initialize the script and prepare it for its first run.

Parameters

main_script	The full path of the script to load.
instance_name	The name of the instance out of the script to load.
company	Which company this script is serving.

Definition at line 70 of file script_instance.cpp.

References controller, Squirrel::CreateClassInstance(), Died(), engine, Script_FatalError::GetErrorMessage(), instance, is_dead, IsDead(), Squirrel::IsSuspended(), LoadDummyScript(), Squirrel::LoadScript(), ScriptScanner::main_script, RegisterAPI(), Squirrel::ResumeError(), Squirrel::SetGlobalPointer(), and Squirrel::ThrowError().

Referenced by AIInstance::Initialize(), and GameInstance::Initialize().

◆ InsertEvent()

void ScriptInstance::InsertEvent ( class ScriptEvent * event )

Insert an event for this script.

Parameters

event The event to insert.

Definition at line 778 of file script_instance.cpp.

Referenced by Game::NewEvent().

◆ IsPaused()

bool ScriptInstance::IsPaused ( )

Checks if the script is paused.

Returns: true if the script is paused, otherwise false

Definition at line 560 of file script_instance.cpp.

References is_paused.

Referenced by Game::IsPaused(), and ScriptDebugWindow::UpdateGSButtonState().

◆ Load()

ScriptInstance::ScriptData * ScriptInstance::Load ( int version )

static

Load data from a savegame.

Parameters

version The version of the script when saving, or -1 if this was not the original script saving the game.

Returns: a pointer to loaded data.

Definition at line 673 of file script_instance.cpp.

References _script_byte, _script_sl_byte, LoadEmpty(), LoadObjects(), and SlObject().

◆ LoadCompatibilityScripts()

bool ScriptInstance::LoadCompatibilityScripts	(	const std::string &	api_version,
		Subdirectory	dir
	)

protected

Load squirrel scripts to emulate an older API.

Parameters

api_version	API version to load scripts for
dir	Subdirectory to find the scripts in

Returns: true iff script loading should proceed

Definition at line 119 of file script_instance.cpp.

Referenced by AIInstance::RegisterAPI(), and GameInstance::RegisterAPI().

◆ LoadObjects()

bool ScriptInstance::LoadObjects ( ScriptData * data )

staticprivate

Load all objects from a savegame.

Returns: True if the loading was successful.

Definition at line 565 of file script_instance.cpp.

References _script_byte, _script_sl_byte, IsSavegameVersionBefore(), SlCopy(), SlObject(), SLV_SCRIPT_INT64, and SQSL_INT.

Referenced by Load(), LoadEmpty(), and LoadOnStack().

◆ LoadOnStack()

void ScriptInstance::LoadOnStack ( ScriptData * data )

Store loaded data on the stack.

Parameters

data	The loaded data to store on the stack.

Definition at line 690 of file script_instance.cpp.

References engine, Script_FatalError::GetErrorMessage(), Squirrel::GetVM(), is_save_data_on_stack, IsDead(), and LoadObjects().

◆ Pause()

void ScriptInstance::Pause ( )

Suspends the script for the current tick and then pause the execution of script.

The script will not be resumed from its suspended state until the script has been unpaused.

Definition at line 546 of file script_instance.cpp.

References _settings_game, Squirrel::DecreaseOps(), engine, Squirrel::GetVM(), is_paused, GameSettings::script, and ScriptSettings::script_max_opcode_till_suspend.

Referenced by Game::Pause().

◆ ReleaseSQObject()

void ScriptInstance::ReleaseSQObject ( HSQOBJECT * obj )

Decrease the ref count of a squirrel object.

Parameters

obj	The object to release.

Definition at line 791 of file script_instance.cpp.

References engine, in_shutdown, and Squirrel::ReleaseObject().

◆ SaveObject()

bool ScriptInstance::SaveObject	(	HSQUIRRELVM	vm,
		SQInteger	index,
		int	max_depth,
		bool	test
	)

staticprivate

Save one object (int / string / array / table) to the savegame.

Parameters

vm	The virtual machine to get all the data from.
index	The index on the squirrel stack of the element to save.
max_depth	The maximum depth recursive arrays / tables will be stored with before an error is returned.
test	If true, don't really store the data but only check if it is valid.

Returns: True if the saving was successful.

Definition at line 354 of file script_instance.cpp.

References _script_byte, _script_sl_byte, SlCopy(), SlObject(), and SQSL_INT.

Referenced by Save().

◆ Unpause()

void ScriptInstance::Unpause ( )

Resume execution of the script.

This function will not actually execute the script, but set a flag so that the script is executed my the usual mechanism that executes the script.

Definition at line 555 of file script_instance.cpp.

References is_paused.

Referenced by Game::Unpause().

The documentation for this class was generated from the following files:

src/script/script_instance.hpp
src/script/script_instance.cpp

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Private Types

Private Member Functions

Static Private Member Functions

Private Attributes

Friends

Detailed Description

Member Enumeration Documentation

◆ SQSaveLoadType

Member Function Documentation

◆ Continue()

◆ DoCommandCallback()

◆ FindLibrary()

◆ GetOpsTillSuspend()

◆ GetSetting()

◆ Initialize()

◆ InsertEvent()

◆ IsPaused()

◆ Load()

◆ LoadCompatibilityScripts()

◆ LoadObjects()

◆ LoadOnStack()

◆ Pause()

◆ ReleaseSQObject()

◆ SaveObject()

◆ Unpause()