This function is used to create a buffer local variable named name . A buffer local variable is a variable whose value is local to the current buffer.

This function returns the value of the buffer local variable specified by name .

This function sets the value of the buffer local variable with name v to value val . The buffer local variable specified by v must have been previously created by the create_blocal_var function. val must have the type that was declared when create_blocal_var was called.