$SirMsgP: Difference between revisions
| Line 35: | Line 35: | ||
<ul> | <ul> | ||
<li><var>$SirMsgP</var> and <var>[[$SirMsg]]</var> allow a programmer to use a <var class="product">Model 204</var> procedure as a message repository. Each line of the procedure corresponds to a message that can be requested by line number with <var>$SirMsg</var>. | <li><var>$SirMsgP</var> and <var>[[$SirMsg]]</var> allow a programmer to use a <var class="product">Model 204</var> procedure as a message repository. Each line of the procedure corresponds to a message that can be requested by line number with <var>$SirMsg</var>. | ||
<p> | |||
The advantages of using <var>$SirMsg</var> are: | The advantages of using <var>$SirMsg</var> are: | ||
</p> | |||
<ul> | <ul> | ||
<li>No server space is wasted holding infrequently used error messages. | <li>No server space is wasted holding infrequently used error messages. | ||
| Line 44: | Line 45: | ||
<li>If <var>$SirMsgP</var> determines that another thread has the same procedure as its current <var>$SirMsg</var> procedure then that thread's virtual storage copy is shared. <var>$SirMsgP</var> considers another thread to be using the same <var>$SirMsg</var> procedure if the procedure name, file name and contents of the procedure are identical to the one being set. | <li>If <var>$SirMsgP</var> determines that another thread has the same procedure as its current <var>$SirMsg</var> procedure then that thread's virtual storage copy is shared. <var>$SirMsgP</var> considers another thread to be using the same <var>$SirMsg</var> procedure if the procedure name, file name and contents of the procedure are identical to the one being set. | ||
<p> | |||
If not released explicitly, the virtual storage occupied by a <var>$SirMsg</var> procedure will not be released until user logoff or restart. To release the virtual storage used by a <var>$SirMsg</var> procedure without setting a new one, simply invoke <var>$SirMsgP</var> with a null procedure name. For example, the following statement would clear the current <var>$SirMsg</var> procedure and set %rc to 3:</p> | |||
<p class="code">%rc = $SirMsgP(<nowiki>''</nowiki>) | <p class="code">%rc = $SirMsgP(<nowiki>''</nowiki>) | ||
</p> | </p> | ||
[[Category:$Functions|$SirMsgP]] | [[Category:$Functions|$SirMsgP]] | ||
Revision as of 21:10, 11 April 2013
Load procedure for retrieval via $SirMsg
Most Sirius $functions have been deprecated in favor of Object Oriented methods. There is no OO equivalent for the $SirMsgP function.
The $SirMsgP function is used to load a procedure into virtual storage for use as the current $SirMsg procedure.
$SirMsgP accepts two arguments and returns a numeric code. As of Sirius Mods Version 6.8, it is a callable $function .
The first argument is required and identifies the User Language procedure to be made the current $SirMsg procedure.
The second argument is an optional file name. If the second argument is not provided, or is a null string, the current file is used.
Syntax
%result = $SirMsgP(proc_name, [file_name])
%result is set to indicate the success of the function.
Return codes
0 - Procedure set as current $SirMsg procedure 1 - Procedure is locked for edit or delete 2 - Procedure does not exist or the current user does not have access privilege 3 - Specified procedure name is invalid (null) 4 - Either file name invalid, or no current file, or caller does not have sufficient privilege to display/include procedures 7 - There is insufficient virtual storage to load the procedure
Usage notes
- $SirMsgP and $SirMsg allow a programmer to use a Model 204 procedure as a message repository. Each line of the procedure corresponds to a message that can be requested by line number with $SirMsg.
The advantages of using $SirMsg are:
- No server space is wasted holding infrequently used error messages.
- The virtual storage holding the messages is shared among users.
- It simplifies sharing common messages among procedures in a subsystem or online.
- If $SirMsgP determines that another thread has the same procedure as its current $SirMsg procedure then that thread's virtual storage copy is shared. $SirMsgP considers another thread to be using the same $SirMsg procedure if the procedure name, file name and contents of the procedure are identical to the one being set.
If not released explicitly, the virtual storage occupied by a $SirMsg procedure will not be released until user logoff or restart. To release the virtual storage used by a $SirMsg procedure without setting a new one, simply invoke $SirMsgP with a null procedure name. For example, the following statement would clear the current $SirMsg procedure and set %rc to 3:
%rc = $SirMsgP('')