diff options
Diffstat (limited to 'src/cpu.c')
| -rw-r--r-- | src/cpu.c | 53 |
1 files changed, 50 insertions, 3 deletions
@@ -65,12 +65,26 @@ static void _cpu_preempt_enable(void) rt_hw_local_irq_enable(level); } +/** + * @brief Initialize a static spinlock object. + * + * @param lock is a pointer to the spinlock to initialize. + * It is assumed that storage for the spinlock will be allocated in your application. + */ void rt_spin_lock_init(struct rt_spinlock *lock) { rt_hw_spin_lock_init(&lock->lock); } RTM_EXPORT(rt_spin_lock_init) +/** + * @brief This function will lock the spinlock. + * + * @note If the spinlock is locked, the current CPU will keep polling the spinlock state + * until the spinlock is unlocked. + * + * @param lock is a pointer to the spinlock. + */ void rt_spin_lock(struct rt_spinlock *lock) { _cpu_preempt_disable(); @@ -78,6 +92,11 @@ void rt_spin_lock(struct rt_spinlock *lock) } RTM_EXPORT(rt_spin_lock) +/** + * @brief This function will unlock the spinlock. + * + * @param lock is a pointer to the spinlock. + */ void rt_spin_unlock(struct rt_spinlock *lock) { rt_hw_spin_unlock(&lock->lock); @@ -85,6 +104,16 @@ void rt_spin_unlock(struct rt_spinlock *lock) } RTM_EXPORT(rt_spin_unlock) +/** + * @brief This function will disable the local interrupt and then lock the spinlock. + * + * @note If the spinlock is locked, the current CPU will keep polling the spinlock state + * until the spinlock is unlocked. + * + * @param lock is a pointer to the spinlock. + * + * @return Return current cpu interrupt status. + */ rt_base_t rt_spin_lock_irqsave(struct rt_spinlock *lock) { unsigned long level; @@ -98,6 +127,13 @@ rt_base_t rt_spin_lock_irqsave(struct rt_spinlock *lock) } RTM_EXPORT(rt_spin_lock_irqsave) +/** + * @brief This function will unlock the spinlock and then restore current cpu interrupt status. + * + * @param lock is a pointer to the spinlock. + * + * @param level is interrupt status returned by rt_spin_lock_irqsave(). + */ void rt_spin_unlock_irqrestore(struct rt_spinlock *lock, rt_base_t level) { rt_hw_spin_unlock(&lock->lock); @@ -108,20 +144,29 @@ void rt_spin_unlock_irqrestore(struct rt_spinlock *lock, rt_base_t level) RTM_EXPORT(rt_spin_unlock_irqrestore) /** - * This fucntion will return current cpu. + * @brief This fucntion will return current cpu object. + * + * @return Return a pointer to the current cpu object. */ struct rt_cpu *rt_cpu_self(void) { return &_cpus[rt_hw_cpu_id()]; } +/** + * @brief This fucntion will return the cpu object corresponding to index. + * + * @return Return a pointer to the cpu object corresponding to index. + */ struct rt_cpu *rt_cpu_index(int index) { return &_cpus[index]; } /** - * This function will lock all cpus's scheduler and disable local irq. + * @brief This function will lock all cpus's scheduler and disable local irq. + * + * @return Return current cpu interrupt status. */ rt_base_t rt_cpus_lock(void) { @@ -148,7 +193,9 @@ rt_base_t rt_cpus_lock(void) RTM_EXPORT(rt_cpus_lock); /** - * This function will restore all cpus's scheduler and restore local irq. + * @brief This function will restore all cpus's scheduler and restore local irq. + * + * @param level is interrupt status returned by rt_cpus_lock(). */ void rt_cpus_unlock(rt_base_t level) { |