New (Daemon constructor): Difference between revisions
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<tr><th>%daemon</th> | <tr><th>%daemon</th> | ||
<td>A previously defined <var>[[Daemon class|Daemon]]</var> object. </td></tr> | <td>A previously defined <var>[[Daemon class|Daemon]]</var> object. </td></tr> | ||
<tr><th>CopyGlobals</th> | <tr><th><var>CopyGlobals</var></th> | ||
<td>An optional, but <var>[[Methods#Named parameters|NameRequired]]</var> parameter whose value is a <var>[[Boolean enumeration]]</var>. | <td>An optional, but <var>[[Methods#Named parameters|NameRequired]]</var> parameter whose value is a <var>[[Boolean enumeration]]</var>. | ||
The default is <code>False</code>: do not copy the existing global variable information from the master thread; use default GTBL-creation settings for the daemon. | The default is <code>False</code>: do not copy the existing global variable information from the master thread; use default GTBL-creation settings for the daemon. | ||
If set to <code>True</code>:<ul><li>The GTBL server table is set to the same size on the daemon as it is on the master thread.<li>The GTBLHASH and GTBLPCT parameters on the daemon thread are set to the same values as on the master thread.<li>Only unstructured globals (globals created by $setg or $getg) and Perm Global Images in the master thread GTBL are copied to the daemon (Global Foundsets/Lists, Global Screens, and any Temp Global items are <b><i>not</i></b> copied).</ul></td></tr> | If set to <code>True</code>:<ul><li>The GTBL server table is set to the same size on the daemon as it is on the master thread.<li>The GTBLHASH and GTBLPCT parameters on the daemon thread are set to the same values as on the master thread.<li>Only unstructured globals (globals created by $setg or $getg) and Perm Global Images in the master thread GTBL are copied to the daemon (Global Foundsets/Lists, Global Screens, and any Temp Global items are <b><i>not</i></b> copied).</ul></td></tr> | ||
<tr><th>Transactional</th> | <tr><th><var>Transactional</var></th> | ||
<td>An optional, but <var>[[Methods#Named parameters|NameRequired]]</var> parameter whose value is a <var>[[Boolean enumeration]]</var>.<ul><li>If set to <code>True</code>, the daemon is [[Daemon_class#Transactional_daemons|transactional]], with the master and daemon threads share a single updating transaction.<li>If set to <code>False</code>, the default, the daemon is non-transactional.</ul> | <td>An optional, but <var>[[Methods#Named parameters|NameRequired]]</var> parameter whose value is a <var>[[Boolean enumeration]]</var>.<ul><li>If set to <code>True</code>, the daemon is [[Daemon_class#Transactional_daemons|transactional]], with the master and daemon threads share a single updating transaction.<li>If set to <code>False</code>, the default, the daemon is non-transactional.</ul> | ||
This parameter is new as of <var class="product">[[Sirius Mods|"Sirius Mods"]]</var> Version 6.8.</td></tr> | This parameter is new as of <var class="product">[[Sirius Mods|"Sirius Mods"]]</var> Version 6.8.</td></tr> | ||
Revision as of 00:04, 13 April 2011
Create a new Daemon (Daemon class)
New creates a new Daemon object instance. It has two, optional, arguments.
Syntax
%daemon = [%(Daemon):]New[( [CopyGlobals= boolean], [Transactional= boolean], - [OpenAll= boolean])] Throws MaxDaemExceeded, NoFreeDaemons, DaemonLost
Syntax terms
| %daemon | A previously defined Daemon object. |
|---|---|
| CopyGlobals | An optional, but NameRequired parameter whose value is a Boolean enumeration.
The default is
If set to True:
|
| Transactional | An optional, but NameRequired parameter whose value is a Boolean enumeration.
|
Exceptions
This subroutine can throw the following exceptions:
- NoFreeDaemons
- If there are no daemon threads available to service the object, a NoFreeDaemons exception is thrown. This exception will only be thrown in "Sirius Mods" Version 7.2 and later.
Usage notes
- New not only creates a Daemon object in the user tables, but it also finds a free sdaemon thread and dedicates it to the issuing user. If no sdaemon threads are available, the request is cancelled.
- The number of daemons allowed per master thread is limited by the MAXDAEM system parameter, whose default value is 1.
- If you specify
CopyGlobals=True, and if there is insufficient server space (say, if daemons start out with very big tables, except for GTBL, and the master has a very big GTBL), the daemon fails during initialization.