default_error_handler error_handler_errno MEOS_ERR_NO meos_errno meos_errno_reset meos_errno_restore meos_errno_set meos_error MEOS_ERROR_HANDLER meos_initialize_error_handler

meos_errno_reset() int meos_errno_reset ( void  ) Clears an error number. Returns Returns the previous value of the errno, for convenient reset/restore operations int foo(void) { // errno may be set on entry, but we need to reset it to be able to // check for errors from "do_something()" int last_errno = meos_errno_reset(); // local failure if (0==P) return meos_errno_set(42); // call to function that may fail do_something(); // failure in do_something? - keep latest error status if (meos_errno()) return meos_errno(); // success - restore previous error status, return 0 return meos_errno_restore(last_errno); }