[GitHub] [incubator-nuttx] pkarashchenko commented on a change in pull request #5171: semphore: release all semphores' holder that the task held when exit

[GitBox]

pkarashchenko commented on a change in pull request #5171:
URL: https://github.com/apache/incubator-nuttx/pull/5171#discussion_r778982536



##########
File path: sched/semaphore/sem_holder.c
##########
@@ -187,35 +194,36 @@ nxsem_findorallocateholder(sem_t *sem, FAR struct tcb_s 
*htcb)
 static inline void nxsem_freeholder(sem_t *sem,
                                     FAR struct semholder_s *pholder)
 {
-#if CONFIG_SEM_PREALLOCHOLDERS > 0
-  FAR struct semholder_s *curr;
-  FAR struct semholder_s *prev;
-#endif
+  FAR struct semholder_s **curr;

Review comment:
       ```suggestion
     struct semholder_s * FAR *curr;
   ```

##########
File path: include/semaphore.h
##########
@@ -58,19 +58,23 @@
 
 #ifdef CONFIG_PRIORITY_INHERITANCE
 struct tcb_s; /* Forward reference */
+struct sem_s;
+
 struct semholder_s
 {
 #if CONFIG_SEM_PREALLOCHOLDERS > 0
-  struct semholder_s *flink;     /* Implements singly linked list */
+  struct semholder_s *flink;     /* List of semphore's holder             */

Review comment:
       ```suggestion
     FAR struct semholder_s *flink; /* List of semphore's holder             */
   ```

##########
File path: include/semaphore.h
##########
@@ -58,19 +58,23 @@
 
 #ifdef CONFIG_PRIORITY_INHERITANCE
 struct tcb_s; /* Forward reference */
+struct sem_s;
+
 struct semholder_s
 {
 #if CONFIG_SEM_PREALLOCHOLDERS > 0
-  struct semholder_s *flink;     /* Implements singly linked list */
+  struct semholder_s *flink;     /* List of semphore's holder             */
 #endif
-  FAR struct tcb_s *htcb;        /* Holder TCB */
+  struct semholder_s *tlink;     /* List of task held semphores           */

Review comment:
       ```suggestion
     FAR struct semholder_s *tlink; /* List of task held semphores           */
   ```

##########
File path: sched/semaphore/sem_holder.c
##########
@@ -1200,4 +1211,31 @@ int nxsem_nfreeholders(void)
 }
 #endif
 
+/****************************************************************************
+ * Name: nxsem_release_all
+ *
+ * Description:
+ *   Release all semphore holders for the task.
+ *
+ * Input Parameters:
+ *   stcb - TCB of the task
+ *
+ * Returned Value:
+ *   None
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+void nxsem_release_all(FAR struct tcb_s *htcb)
+{
+  while (htcb->holdsem != NULL)
+    {
+      FAR struct semholder_s *pholder = htcb->holdsem;
+      FAR sem_t *sem = pholder->sem;
+
+      nxsem_freeholder(sem, pholder);
+    }
+}

Review comment:
       Minor
   ```suggestion
   void nxsem_release_all(FAR struct tcb_s *htcb)
   {
     FAR struct semholder_s *pholder;
     
     while ((pholder = htcb->holdsem) != NULL)
       {
         FAR sem_t *sem = pholder->sem;
   
         nxsem_freeholder(sem, pholder);
       }
   }
   ```




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