This function stores a supplied arbitrary pointer in the Channel. When a source or sink function is invoked by the Channel, the invoked function can use the astChannelData macro to retrieve the pointer. This provides a thread-safe alternative to passing file descriptors, etc, via global static variables.

void astPutChannelData( AstChannel $\ast$this, void $\ast$data )

this

data

Channel

• This routine is not available in the Fortran 77 interface to the AST library.