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	For a process to send a signal to itself, the [[local variable]] [[id]] can be used.		For a process to send a signal to itself, the [[local variable]] [[id]] can be used.
	The parameter signal is passed by way of a set of [[signals]] which denote the signal which is to be sent.		The parameter signal is passed by way of a set of [[signals]] which denote the signal which is to be sent.
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		+	To kill all processes at once, except the calling one, use [[let_me_alone]]().
	== Example ==		== Example ==

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Current revision

Contents 1 Definition 2 Parameters 3 Returns 4 Errors 5 Notes 6 Example

[edit] Definition

INT signal ( <INT processID|processTypeID> , <INT signal> )

Allows a process/function or a range of processes/functions of certain processType to be controlled in a limited number of ways, by sending signals.

[edit] Parameters

INT processID|processTypeID	- The ProcessID of the process or the ProcessTypeID of the type of processes to which the signal is to be sent.
INT signal	- The code of the signal that is to be sent to the target process.

[edit] Returns

INT :

false	- The specified processID|processTypeID was 0 or a processTypeID.
true	- The specified processID|processTypeID was a processID.

[edit] Errors

Invalid processID	- The process with specified processID is not alive. (Pre 0.90.2 only)
Invalid signal	- The specified signal is invalid.

[edit] Notes

To obtain the processType of a function, the operator Type can be used. For a process to send a signal to itself, the local variable id can be used. The parameter signal is passed by way of a set of signals which denote the signal which is to be sent.

To kill all processes at once, except the calling one, use let_me_alone().

[edit] Example

signal( get_id(type enemy) , s_kill ); // Kills a process of type enemy
signal( id , s_kill_tree );            // Kills the process that calls it, and all of its descendants
signal( Type player , s_freeze );      // Freezes all processes of type player so that they are
                                       //     still displayed, but do not execute any code.

Processinteraction Functions

• Advance() • Collision() • Exists() • Get_angle() • Get_dist() • Get_id() • Let_me_alone() • Signal() • Xadvance() •