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前往新版Gitcode,体验更适合开发者的 AI 搜索 >>
提交
e6f5282f
编写于
9月 10, 2021
作者:
G
guozhanxin
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差异文件
[kernel] Improve the code comment of the cpu.c
上级
e562c6f2
变更
1
隐藏空白更改
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并排
Showing
1 changed file
with
50 addition
and
3 deletion
+50
-3
src/cpu.c
src/cpu.c
+50
-3
未找到文件。
src/cpu.c
浏览文件 @
e6f5282f
...
...
@@ -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
)
{
...
...
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