search for: begin_suspend_interrupts

...the user pressed Ctr-C during the call? R-ext doesn't seem to discuss this. I'd guess that R_alloc is interrupt-safe while Calloc is not, but I am not sure. In any case a paragraph in R-ext on signals would be helpful. While looking around for interrupts handling in the code I came across BEGIN_SUSPEND_INTERRUPTS macro in Defn.h file. Unfortunately, it is not available via R.h or Rinternals.h. Am I missing something? If not, could future releases of R make it available via, say, Rinternals.h? Thanks, Vadim [[alternative HTML version deleted]]