MATLAB REAL-TIME WORKSHOP 7 - TARGET LANGUAGE COMPILER Wartungshandbuch PDF herunterladen (Seite 41)

Compiler Directives

2-21

identifier2 specifies the identifier to be used for testing whether the loop was

rolled within the body. For example,

%for Index = <NumNonVirtualSubsystems>3, rollvar="i"

{

int i;

for (i=0; i< %<NumNonVirtualSubsystems>; i++)

{

%body

x[%<rollvar>] = system_name[%<rollvar>];

%endbody

}

%endfor

If the number of nonvirtual subsystems (NumNonVirtualSubsystems) is greater

than or equal to 3, the loop is rolled, causing all of the code within the loop to

be generated exactly once. In this case,

Index = 0.

If the loop is not rolled, the text before and after the body of the loop is ignored

and the body is generated

NumNonVirtualSubsystems times.

This mechanism gives each individual loop control over whether or not it

should be rolled.

Note: The %for directive is functional, but it is not recommended. Rather, use

%roll, which provides the same capability in a more open way. RTW does not

make use of the %for construct.

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MATLAB REAL-TIME WORKSHOP 7 - TARGET LANGUAGE COMPILER Wartungshandbuch Seite 41