wdog: add API wd_cancel_irq() support

Signed-off-by: ligd <[email protected]>

Author: GUIDINGLI

include/nuttx/wdog.h

@@ -194,6 +194,25 @@ int wd_start_absolute(FAR struct wdog_s *wdog, clock_t ticks,
 
 int wd_cancel(FAR struct wdog_s *wdog);
 
+/****************************************************************************
+ * Name: wd_cancel_irq
+ *
+ * Description:
+ *   This function cancels a currently running watchdog timer. Watchdog
+ *   timers may be cancelled from the interrupt level.  This function is
+ *   intended to be called from critical sections.
+ *
+ * Input Parameters:
+ *   wdog - ID of the watchdog to cancel.
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success;  A negated errno value is returned to
+ *   indicate the nature of any failure.
+ *
+ ****************************************************************************/
+
+int wd_cancel_irq(FAR struct wdog_s *wdog);
+
 /****************************************************************************
  * Name: wd_gettime
  *

sched/wdog/wd_cancel.c

@@ -58,7 +58,36 @@
 int wd_cancel(FAR struct wdog_s *wdog)
 {
   irqstate_t flags;
+  int ret;
 
+  flags = enter_critical_section();
+
+  ret = wd_cancel_irq(wdog);
+
+  leave_critical_section(flags);
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: wd_cancel_irq
+ *
+ * Description:
+ *   This function cancels a currently running watchdog timer. Watchdog
+ *   timers may be cancelled from the interrupt level.  This function is
+ *   intended to be called from critical sections.
+ *
+ * Input Parameters:
+ *   wdog - ID of the watchdog to cancel.
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success;  A negated errno value is returned to
+ *   indicate the nature of any failure.
+ *
+ ****************************************************************************/
+
+int wd_cancel_irq(FAR struct wdog_s *wdog)
+{
   if (wdog == NULL)
     {
       return -EINVAL;
@@ -68,8 +97,6 @@ int wd_cancel(FAR struct wdog_s *wdog)
    * cancellation is complete
    */
 
-  flags = enter_critical_section();
-
   /* Make sure that the watchdog is still active. */
 
   if (WDOG_ISACTIVE(wdog))
@@ -95,6 +122,5 @@ int wd_cancel(FAR struct wdog_s *wdog)
         }
     }
 
-  leave_critical_section(flags);
   return OK;
 }