.TH rtapi_module_param "3rtapi" "2006-10-12" "LinuxCNC Documentation" "RTAPI"
.SH NAME

rtapi_module_param \- Specifying module parameters

.SH SYNTAX
.HP
RTAPI_MP_INT(\fIvar\fR, \fIdescription\fR)

.HP
RTAPI_MP_LONG(\fIvar\fR, \fIdescription\fR)

.HP
RTAPI_MP_STRING(\fIvar\fR, \fIdescription\fR)

.HP
RTAPI_MP_ARRAY_INT(\fIvar\fR, \fInum\fR, \fIdescription\fR)

.HP
RTAPI_MP_ARRAY_LONG(\fIvar\fR, \fInum\fR, \fIdescription\fR)

.HP
RTAPI_MP_ARRAY_STRING(\fIvar\fR, \fInum\fR, \fIdescription\fR)

.HP
MODULE_LICENSE(\fIlicense\fR)

.HP
MODULE_AUTHOR(\fIauthor\fR)

.HP
MODULE_DESCRIPTION(\fIdescription\fR)

.HP
EXPORT_FUNCTION(\fIfunction\fR)

.SH  ARGUMENTS
.IP \fIvar\fR
The variable where the parameter should be stored
.IP \fIdescription\fR
A short description of the parameter or module
.IP \fInum\fR
The maximum number of values for an array parameter
.IP \fIlicense\fR
The license of the module, for instance "GPL"
.IP \fIauthor\fR
The author of the module
.IP \fIfunction\fR
The pointer to the function to be exported

.SH DESCRIPTION
These macros are portable ways to declare kernel module parameters.  They must
be used in the global scope, and are not followed by a terminating semicolon.
They must be used after the associated variable or function has been defined.

.SH NOTES
EXPORT_FUNCTION makes a symbol available for use by a subsequently loaded
component.  It is unrelated to hal functions, which are described in
hal_export_funct(3hal)

.SH REALTIME CONSIDERATIONS
Not available in userspace code.