Changeset 4a6da62 in mainline

Timestamp:

2012-07-24T14:20:54Z (12 years ago)

Author:

Adam Hraska <adam.hraska+hos@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

64be561

Parents:

5b382774

Message:

rcu: Added rcu_read_locked().

Location:

kernel/generic

Files:

• include/synch/rcu.h (modified) (2 diffs)
• src/synch/rcu.c (modified) (1 diff)

kernel/generic/include/synch/rcu.h

@@ -147 +147 @@
 
 
-#ifndef member_to_inst
-#define member_to_inst(ptr_member, type, member_identif) \
-        ((type*) (((void*)(ptr_member)) - ((void*)&(((type*)0)->member_identif))))
-#endif
-
 /** Use to assign a pointer to newly initialized data to a rcu reader 
  * accessible pointer.
@@ -205 +200 @@
 extern void rcu_read_lock(void);
 extern void rcu_read_unlock(void);
+extern bool rcu_read_locked(void);
 extern void rcu_synchronize(void);
 extern void rcu_call(rcu_item_t *rcu_item, rcu_func_t func);

kernel/generic/src/synch/rcu.c

@@ -386 +386 @@
         
         preemption_enable();
+}
+
+/** Returns true if in an rcu reader section. */
+bool rcu_read_locked(void)
+{
+        preemption_disable();
+        bool locked = 0 < *CPU->rcu.pnesting_cnt;
+        preemption_enable();
+        
+        return locked;
 }