beremiz

Add retain basic implementation on GNU/Linux

2018-06-07, Andrey Skvortsov
976841968d74
Add retain basic implementation on GNU/Linux

Retain is saved in file and backup of this file is done every time.
File isn't saved on every PLC cycle to avoid high I/O load.
By default, retain is saved every second and on PLC stop/shutdown.
It's possible to override retain flush period by using CFLAGS option
in project's settings. For example, for 0.5 seconds period
use "-DFILE_RETAIN_SAVE_PERIOD_S=0.5".
include yslt.yml2
in xsl {
decl istylesheet (
*output="xml",
version="1.0",
xmlns:xsl="http://www.w3.org/1999/XSL/Transform",
xmlns:exsl='http://exslt.org/common',
extension-element-prefixes='exsl'
) alias stylesheet {
output *output;
content;
};
decl template(match) {
content;
};
decl function(name) alias template {
content;
};
decl call(name) alias call-template {
content;
};
decl apply(select) alias apply-templates {
content;
};
}