void rt_typed_sem_init (SEM *sem, int value, int type)
  Initialize a specifically typed (counting, binary, resource) semaphore.

void rt_sem_init (SEM *sem, int value)
  Initialize a counting semaphore.
　semで指定されるカウンティング fifo queueing セマフォを初期化します。
　セマフォはリアルタイムタスク間で通信と同期化のために使われることができます。

int rt_sem_delete (SEM *sem)
  Delete a semaphore.
　rt_sem_init () で作られたセマフォをデリートします。

int rt_sem_signal (SEM *sem)
  Signaling a semaphore.
　セマフォにイベントを与えます。
　多くは、タスクがクリティカルリージョンにから出るときに呼ばれます。セマフォ値を増加してテストします。 もしセマフォ値　=<0　ならば、このセマフォの待ち行列で最初のタスクが実行可能にされます。rt_sem_signal は呼び出し側タスクをブロックしません。

int rt_sem_broadcast (SEM *sem)
  Signaling a semaphore.

int rt_sem_wait (SEM *sem)
  Take a semaphore.
　このセマフォにイベントが発生するのを待ちます。
　多くは、タスクがクリティカルリージョンに入るときに呼ばれます。セマフォ値を減算してテストをします。もし、セマフォ値　>=0　であれば、直ちに戻ります。さもなければ呼び出しタスクはブロックされて、待ち行列に入れられます。待ち行列のプライオリティオーダーかＦＩＦＯベースかはコンパイル時オプション SEM_PRIORD によって決定されます。

int rt_sem_wait_if (SEM *sem)
  Take a semaphore, only if the calling task is not blocked.

int rt_sem_wait_until (SEM *sem, RTIME time)
  Wait a semaphore with timeout.

int rt_sem_wait_timed (SEM *sem, RTIME delay)
  Wait a semaphore with timeout.

int rt_sem_wait_barrier (SEM *sem)
  Wait on a semaphore barrier.

int rt_cond_signal (CND *cnd)
  Wait for a signal to a conditional variable.

int rt_cond_wait (CND *cnd, SEM *mtx)
  Wait for a signal to a conditional variable.

int rt_cond_wait_until (CND *cnd, SEM *mtx, RTIME time)
  Wait a semaphore with timeout.

int rt_cond_wait_timed (CND *cnd, SEM *mtx, RTIME delay)
  Wait a semaphore with timeout.

int rt_rwl_init (RWL *rwl)
  Initialize a multi readers single writer lock.

int rt_rwl_delete (RWL *rwl)
  destroys a multi readers single writer lock.

int rt_rwl_rdlock (RWL *rwl)
  acquires a multi readers single writer lock for reading.

int rt_rwl_rdlock_if (RWL *rwl)
  try to acquire a multi readers single writer lock just for reading.

int rt_rwl_rdlock_until (RWL *rwl, RTIME time)
  try to acquire a multi readers single writer lock for reading within an absolute deadline time.

int rt_rwl_rdlock_timed (RWL *rwl, RTIME delay)
  try to acquire a multi readers single writer lock for reading within a relative deadline time.

int rt_rwl_wrlock (RWL *rwl)
  acquires a multi readers single writer lock for wrtiting.

int rt_rwl_wrlock_if (RWL *rwl)
  acquires a multi readers single writer lock for writing.

int rt_rwl_wrlock_until (RWL *rwl, RTIME time)
  try to acquire a multi readers single writer lock for writing within an absolute deadline time.

int rt_rwl_wrlock_timed (RWL *rwl, RTIME delay)
  try to acquire a multi readers single writer lock for writing within a relative deadline time.

int rt_rwl_unlock (RWL *rwl)
  unlock an acquired multi readers single writer lock.

int rt_spl_init (SPL *spl)
  Initialize a spinlock.

int rt_spl_delete (SPL *spl)
  Initialize a spinlock.

int rt_spl_lock (SPL *spl)
  Acquire a spinlock.

int rt_spl_lock_if (SPL *spl)
  Acquire a spinlock without waiting.

int rt_spl_lock_timed (SPL *spl, unsigned long ns)  Acquire a spinlock with timeout.

int rt_spl_unlock (SPL *spl)  Release an owned spinlock.

SEM * _rt_typed_named_sem_init (unsigned long sem_name, int value, int type)  Initialize a specifically typed (counting, binary, resource) semaphore identified by a name.

int rt_named_sem_delete (SEM *sem)  Delete a semaphore initialized in named mode.

RWL * _rt_named_rwl_init (unsigned long rwl_name)  Initialize a multi readers single writer lock identified by a name.

int rt_named_rwl_delete (RWL *rwl)  Delete a multi readers single writer lock in named mode.

SPL * _rt_named_spl_init (unsigned long spl_name)  Initialize a spinlock identified by a name.

int rt_named_spl_delete (SPL *spl)  Delete a spinlock in named mode.