doxygen: fixed duplicated comments for cpu APIs

Refer to the issue described in PR #10599. This was a
temporary fix at that time.

After further research, we discovered that this issue
can be addressed using the "@cond" command supported
by Doxygen.

Since we currently do not intend to generate two sets
of documentation for UP and MP when generating Doxygen
documentation, the current solution is to generate only
MP documentation by default. For functions defined in
MP but not in UP, we will use the "@note" command in
the function's Doxygen comment to indicate whether the
function supports both UP and MP, or only MP.

Signed-off-by: Chen Wang <unicorn_wang@outlook.com>

documentation/Doxyfile

@@ -718,7 +718,7 @@ GENERATE_DEPRECATEDLIST= YES
 # sections, marked by \if <section_label> ... \endif and \cond <section_label>
 # ... \endcond blocks.
 
-ENABLED_SECTIONS       =
+ENABLED_SECTIONS       = DOXYGEN_SMP
 
 # The MAX_INITIALIZER_LINES tag determines the maximum number of lines that the
 # initial value of a variable or macro / define can have for it to appear in the

src/cpu_mp.c

@@ -29,10 +29,20 @@ void *_cpus_lock_pc = 0;
 
 #endif /* RT_DEBUGING_SPINLOCK */
 
+/**
+ * @addtogroup group_thread_comm
+ *
+ * @cond DOXYGEN_SMP
+ *
+ * @{
+ */
+
 /**
  * @brief   Initialize a static spinlock object.
  *
  * @param   lock is a pointer to the spinlock to initialize.
+ *
+ * @note    This function has UP version and MP version.
  */
 void rt_spin_lock_init(struct rt_spinlock *lock)
 {
@@ -43,10 +53,12 @@ RTM_EXPORT(rt_spin_lock_init)
 /**
  * @brief   This function will lock the spinlock, will lock the thread scheduler.
  *
- * @note    If the spinlock is locked, the current CPU will keep polling the spinlock state
- *          until the spinlock is unlocked.
+ * 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.
+ *
+ * @note    This function has UP version and MP version.
  */
 void rt_spin_lock(struct rt_spinlock *lock)
 {
@@ -59,9 +71,11 @@ RTM_EXPORT(rt_spin_lock)
 /**
  * @brief   This function will unlock the spinlock, will unlock the thread scheduler.
  *
- * @note    If the scheduling function is called before unlocking, it will be scheduled in this function.
+ * If the scheduling function is called before unlocking, it will be scheduled in this function.
  *
  * @param   lock is a pointer to the spinlock.
+ *
+ * @note    This function has UP version and MP version.
  */
 void rt_spin_unlock(struct rt_spinlock *lock)
 {
@@ -75,12 +89,14 @@ RTM_EXPORT(rt_spin_unlock)
 /**
  * @brief   This function will disable the local interrupt and then lock the spinlock, will lock the thread scheduler.
  *
- * @note    If the spinlock is locked, the current CPU will keep polling the spinlock state
- *          until the spinlock is unlocked.
+ * 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.
+ *
+ * @note    This function has UP version and MP version.
  */
 rt_base_t rt_spin_lock_irqsave(struct rt_spinlock *lock)
 {
@@ -97,11 +113,13 @@ RTM_EXPORT(rt_spin_lock_irqsave)
 /**
  * @brief   This function will unlock the spinlock and then restore current cpu interrupt status, will unlock the thread scheduler.
  *
- * @note    If the scheduling function is called before unlocking, it will be scheduled in this function.
+ * If the scheduling function is called before unlocking, it will be scheduled in this function.
  *
  * @param   lock is a pointer to the spinlock.
  *
  * @param   level is interrupt status returned by rt_spin_lock_irqsave().
+ *
+ * @note    This function has UP version and MP version.
  */
 void rt_spin_unlock_irqrestore(struct rt_spinlock *lock, rt_base_t level)
 {
@@ -118,6 +136,8 @@ RTM_EXPORT(rt_spin_unlock_irqrestore)
  * @brief   This fucntion will return current cpu object.
  *
  * @return  Return a pointer to the current cpu object.
+ *
+ * @note    This function has UP version and MP version.
  */
 struct rt_cpu *rt_cpu_self(void)
 {
@@ -130,6 +150,8 @@ struct rt_cpu *rt_cpu_self(void)
  * @param   index is the index of target cpu object.
  *
  * @return  Return a pointer to the cpu object corresponding to index.
+ *
+ * @note    This function has UP version and MP version.
  */
 struct rt_cpu *rt_cpu_index(int index)
 {
@@ -140,6 +162,8 @@ struct rt_cpu *rt_cpu_index(int index)
  * @brief   This function will lock all cpus's scheduler and disable local irq.
  *
  * @return  Return current cpu interrupt status.
+ *
+ * @note    This function only has MP version.
  */
 rt_base_t rt_cpus_lock(void)
 {
@@ -176,6 +200,8 @@ RTM_EXPORT(rt_cpus_lock);
  * @brief   This function will restore all cpus's scheduler and restore local irq.
  *
  * @param   level is interrupt status returned by rt_cpus_lock().
+ *
+ * @note    This function only has MP version.
  */
 void rt_cpus_unlock(rt_base_t level)
 {
@@ -211,6 +237,8 @@ RTM_EXPORT(rt_cpus_unlock);
  * If target thread not locked the cpus then unlock the cpus lock.
  *
  * @param   thread is a pointer to the target thread.
+ *
+ * @note    This function only has MP version.
  */
 void rt_cpus_lock_status_restore(struct rt_thread *thread)
 {
@@ -228,6 +256,8 @@ RTM_EXPORT(rt_cpus_lock_status_restore);
  * @brief Get logical CPU ID
  *
  * @return logical CPU ID
+ *
+ * @note    This function only has MP version.
  */
 rt_base_t rt_cpu_get_id(void)
 {
@@ -238,3 +268,9 @@ rt_base_t rt_cpu_get_id(void)
 
     return rt_hw_cpu_id();
 }
+
+/**
+ * @}
+ *
+ * @endcond
+ */

src/cpu_up.c

@@ -14,6 +14,14 @@
 
 static struct rt_cpu _cpu;
 
+/**
+ * @addtogroup group_thread_comm
+ *
+ * @cond
+ *
+ * @{
+ */
+
 /**
  * @brief   Initialize a static spinlock object.
  *
@@ -110,3 +118,9 @@ struct rt_cpu *rt_cpu_index(int index)
 {
     return index == 0 ? &_cpu : RT_NULL;
 }
+
+/**
+ * @}
+ *
+ * @endcond
+ */