Changeset b23c88e in mainline for kernel/generic/include

Timestamp:

2012-07-11T05:45:48Z (14 years ago)

Author:

Adam Hraska <adam.hraska+hos@…>

Branches:

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

Children:

b68ae24

Parents:

9f8745c5

Message:

preemption_disable: Replaced memory barriers with compiler barriers. Added checks if reschedule is needed once preemption is enabled.

Location:

kernel/generic/include

Files:

• arch.h (modified) (1 diff)
• preemption.h (modified) (1 diff)
• proc/thread.h (modified) (1 diff)

kernel/generic/include/arch.h

@@ -53 +53 @@
 #define TASK                 THE->task
 #define AS                   THE->as
-#define PREEMPTION_DISABLED  THE->preemption_disabled
+#define PREEMPTION_DISABLED  (0 != THE->preemption_disabled)
+#define PREEMPTION_ENABLED   (0 == THE->preemption_disabled)
 #define MAGIC                UINT32_C(0xfacefeed)
 

kernel/generic/include/preemption.h

@@ -38 +38 @@
 extern void preemption_disable(void);
 extern void preemption_enable(void);
+extern void preemption_enable_noresched(void);
+extern void preemption_enabled_scheduler(void);
+
+
 
 #endif

kernel/generic/include/proc/thread.h

@@ -155 +155 @@
         state_t state;
         
+        /** The thread would have been rescheduled had it not disabled preemption.*/
+        bool need_resched;
+        
         /** Thread CPU. */
         cpu_t *cpu;