File: OS.em
Description: POL System Environment Functions
Last Modified: 2/11/2003
File Constants:
// set_script_option constants
const SCRIPTOPT_NO_INTERRUPT := 1; // if 1, script runs until it sleeps
const SCRIPTOPT_DEBUG := 2; // if 1, prints any debug info included
const SCRIPTOPT_NO_RUNAWAY := 3; // if 1, doesn't warn about runaway conditions
const SCRIPTOPT_CAN_ACCESS_OFFLINE_MOBILES := 4;
Clear_Event_Queue() |
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Explanation |
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Empties the current script's event queue |
Return values |
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1 on success |
Create_Debug_Context() |
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Explanation |
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TBD |
Return values |
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TBD |
Events_Waiting() |
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Explanation |
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Returns the number of events waiting in the event queue for this script. |
Return values |
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Integer number of events waiting |
GetProcess(pid) |
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Parameters: |
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Name | Type |
pid | Integer process ID of a script |
Explanation |
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Gets a script process object for the given script's PID. |
Return values |
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A Script object |
Errors |
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"Process not found" |
"Invalid parameter type" |
Related |
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Script |
Getpid() |
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Explanation |
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Returns the Process ID for this script. |
Return values |
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Integer Process ID |
Is_Critical() |
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Explanation |
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Returns true if the script is critical (by using set_critical()) |
Return values |
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1 if critical, else 0. |
Run_Script_To_Completion( script_name, param := 0 ) |
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Parameters: |
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Name | Type |
script_name | String name and path of script to run |
param | object to pass to the script. Only one param may be passed. (optional) |
Explanation |
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Starts a new CRITICAL script. Runs until the script exits, returns the return value of the started script. |
Tip: write your script to expect a struct or array as its only parameter, so you may pass multiple pieces of data through the struct or array. |
Every 1000 instructions, "Script X running.." is printed to the console |
Return values |
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The return value of the started script, or 1 if no value was returned |
Errors |
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"Unable to read script" |
"Script exited with an error condition" |
"Script does not exist" |
"Script descriptor error" |
Set_Critical( critical ) |
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Parameters: |
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Name | Type |
critical | Boolean (0/1) |
Explanation |
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critical scripts run if they are not blocked, without interruption. |
An infinite loop in a critical script will hang the server |
Use this in blocks by setting 'critical' to 1 before the critical code and to 0 after it. |
Use this function sparingly, only in parts of code that must execute without interruption |
Return values |
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1 on success |
Errors |
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"Invalid parameter type" |
Set_Debug( debug ) |
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Parameters: |
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Name | Type |
debug | Boolean (0/1) |
Explanation |
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if debug=1, and the script was compiled with 'ecompile -i [script].src', each script source line will be printed as it is executed. |
if debug=0, disables this output. |
Return values |
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1 on success |
Errors |
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"Invalid parameter type" |
Set_Event_Queue_Size(size) |
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Parameters: |
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Name | Type |
size | Integer new size |
Explanation |
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Changes the maximum number of events the current script will keep in the queue (additional events will be discarded). |
If not called, the default size is 20 events. |
Return values |
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Integer old queue size. |
Errors |
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"Invalid parameter type" |
Set_Priority( priority ) |
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Parameters: |
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Name | Type |
priority | Integer 1..255 |
Explanation |
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the priority of a script is how many instructions it executes before switching to another script. |
default script priority is 1. |
Return values |
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Integer previous priority |
Errors |
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"Invalid parameter type" |
Set_Script_Option( optnum, optval ) |
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Parameters: |
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Name | Type |
optnum | Integer constant |
optval | boolean (0/1) |
Explanation |
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Sets one or more options on or off for this script |
Constants for this function:
|
const SCRIPTOPT_NO_INTERRUPT := 1; // if 1, script runs until it sleeps
const SCRIPTOPT_DEBUG := 2; // if 1, prints any debug info included
const SCRIPTOPT_NO_RUNAWAY := 3; // if 1, doesn't warn about runaway conditions
const SCRIPTOPT_CAN_ACCESS_OFFLINE_MOBILES := 4; |
set_script_option(SCRIPTOPT_NO_INTERRUPT,1) is the same as set_critical(1) |
set_script_option(SCRIPTOPT_DEBUG,1) is the same as set_debug(1) |
Return values |
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1 on success |
Errors |
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"Unknown Script Option" |
"Invalid parameter type" |
Sleep( num_seconds ) |
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Parameters: |
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Name | Type |
num_seconds | Integer |
Explanation |
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Puts the current script to sleep for num_seconds. No further instructions in this script will be processed in this script until the time expires. |
DO NOT USE IN A CRITICAL BLOCK! Your server will freeze for the duration! |
If this script is attached to a character (like a UseScript), calling detach() before the sleep will allow other scripts to run while this script sleeps. |
Return values |
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0 after sleep |
Sleepms( num_milliseconds ) |
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Parameters: |
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Name | Type |
num_milliseconds | Integer |
Explanation |
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Puts the current script to sleep for num_milliseconds. No further instructions in this script will be processed in this script until the time expires. |
DO NOT USE IN A CRITICAL BLOCK! Your server will freeze for the duration! |
If this script is attached to a character (like a UseScript), calling detach() before the sleep will allow other scripts to run while this script sleeps. |
You're not likely to get any faster resolution than 10ms |
Return values |
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0 after sleep |
Start_Script( script_name, param := 0 ) |
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Parameters: |
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Name | Type |
script_name | String name and path of script to run |
param | object to pass to the script. Only one param may be passed. (optional) |
Explanation |
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Starts a new script running. |
Tip: write your script to expect a struct or array as its only parameter, so you may pass multiple pieces of data through the struct or array. |
Return values |
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A Script object for the started script on success. |
Errors |
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"Error in script name" |
"Script X does not exist." |
"Unable to start script" |
"Invalid parameter type" |
Related |
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Script |
Syslog( text ) |
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Parameters: |
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Name | Type |
text | String |
Explanation |
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write text to the console, and to the log file includes context (calling script name) |
Return values |
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1 on success |
System_RPM() |
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Explanation |
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returns the system RPM, which is the number of "game loop rotations" completed in the last minute. |
Return values |
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Last System RPM integer |
Unload_Scripts(scriptname := "") |
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Parameters: |
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Name | Type |
scriptname | String filename of script without extension (optional) |
Explanation |
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unload scripts from the script cache (they will be reloaded from disk on demand) currently running scripts will continue as normal. |
Passing "" will unload all scripts. |
Return values |
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Number of scripts unloaded |
Errors |
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"Invalid parameter type" |
Related |
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Script |
Wait_For_Event( num_seconds_timeout ) |
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Parameters: |
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Name | Type |
num_seconds_timeout | Integer |
Explanation |
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The primary access to a script's event queue. If there is an event waiting, the function immediately returns with the event (could be a string, int, struct, etc). |
If no event is waiting, the script sleeps for num_seconds_timeout or until a new event arrives. If the timeout is reached, the function returns 0. |
if timeout is 0, returns immediately |
Return values |
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object on event recv, 0 on timeout |
If you know if any information is incorrect on these pages, mail your corrections to racalac@polserver.com
Copyright ©2003-2011 David Carpman, all rights reserved. DO NOT REPRODUCE, MIRROR, ALTER, SPINDLE, MUTILATE, OR SIT ON.