/**
 * @page article_atomic Invoking multiple primitives as a single atomic operation
 * @{
 * It is often necessary to invoke multiple operations involving a
 * reschedulation as a single atomic operation.<br>
 * ChibiOS/RT already implements APIs that perform complex operations, as
 * example the API @p chSemSignalWait() performs two operations atomically.<br>
 * If more complex operations are required in your application then it is
 * possible to build macro-operations, see the following example:
 * @code
  chSysLock();
 
  chSemSignalI(&sem1);
  chSemSignalI(&sem2);
  chMtxUnlock();
  chSchRescheduleS();
 
  chSysUnlock();
 * @endcode
 * The above example performs a signal operation on two semaphores, unlocks the
 * last aquired mutex and finally performs a reschedulation. All the operations
 * are performed atomically.<br>
 * An hypotetical @p chSemSignalSignalWait() operation could be implemented as
 * follow:
 * @code
  chSysLock();
 
  chSemSignalI(&sem1);
  chSemSignalI(&sem2);
  chSemWaitS(&Sem3);  /* May reschedule or not. */
  chSchRescheduleS(); /* This one reschedules if necessary. */
 
  chSysUnlock();
 * @endcode
 * In general multiple I-Class and (non rescheduling) S-Class APIs can be
 * included and the block is terminated by a rescheduling S-Class API.
 * An extra @p chSchRescheduleS() can be present at the very end of the block,
 * it only reschedules if a reschedulation is still required.
 */
/** @} */