for P99_BLK_MARK P99_BLOCK_DOCUMENT P99_CASERANGE P99_DO P99_FORALL P99_GUARDED_BLOCK P99_HANDLE_ERRNO P99_INVARIANT P99_MARK P99_NOP P99_PARALLEL_DO P99_PARALLEL_FOR P99_PARALLEL_FORALL P99_PROTECT P99_PROTECTED_BLOCK P99_SIMPLE_BLOCKS P99_UNCASE p99_unwind P99_UNWIND p99_unwind_code P99_UNWIND_PROTECT P99_UNWIND_RETURN

P99_HANDLE_ERRNO #define P99_HANDLE_ERRNO Value: P00_BLK_START \ P00_BLK_DECL(int const, p99_errno, errno) \ switch (P99_UNLIKELY(!!p99_errno)) case true: \ P00_BLK_AFTER(errno = 0) \ switch (p99_errno) case 0: Handle and reset errno. This will inspect errno (which is expensive) exactly once. If errno is 0, it will do nothing as efficiently as possible. Otherwise it will execute the dependent block much as a switch statement: P99_HANDLE_ERRNO { fprintf(stderr, "The compiler should tell us that this fprintf here is unreachable.\n"); P99_XCASE EINTR : { fprintf(stderr, "Autsch: call to schnoeck was interrupted!\n"); // do something else in that case } P99_XCASE ENOMEM : fprintf(stderr, "Autsch: call to schnoeck didn't have enough memory!\n"); P99_XDEFAULT : { fprintf(stderr, "AUTSCH: call to schnoeck failed with unhandled case!\n"); perror("AUTSCH"); } fprintf(stderr, "We are doing some common cleanup for the errno handling code.\n"); } Definition at line 471 of file p99_block.h.