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static char volatile timerCounter; for (timerCounter = 0; timerCounter < timeout;) { if (check_keybuf() == 0) { getkey(); break; } else continue; } if (timerCounter >= timeout) { // ... } 

static char volatile timerCounter; for (timerCounter = 0; timerCounter < timeout;) { if (check_keybuf() == 0) { getkey(); break; } // trying to force the extra jump step, doesn't make a difference // else continue; } if (timerCounter >= timeout) { // ... } 

static char volatile timerCounter; for (timerCounter = 0; timerCounter < timeout;) { if (check_keybuf() == 0) { getkey(); break; } } if (timerCounter >= timeout) { // ... } 

 timerCounter = 0; waitForKey: if (timerCounter < timeout) { if (check_keybuf() == 0) { getkey(); goto keyOrTimeout; } goto continue; } else goto keyOrTimeout; continue: // try to force the extra step of an intermediate continue location goto waitForKey; keyOrTimeout: if (timerCounter >= timeout) { // ... } 

static char volatile timerCounter; for (timerCounter = 0; timerCounter < timeout;) { if (check_keybuf() == 0) { getkey(); break; }  else continue; } if (timerCounter >= timeout) { // ... } 

 timerCounter = 0; waitForKey: if (timerCounter < timeout) { if (check_keybuf() == 0) { getkey(); goto keyOrTimeout; } else { // this always gets eliminated ; (void*)NULL;   goto continue; } } else goto keyOrTimeout; continue: // try to force the extra step of an intermediate continue location goto waitForKey; keyOrTimeout: if (timerCounter >= timeout) { // ... }