Changeset b52da8d7 in mainline for src/preempt/preemption.c

Timestamp:

2005-08-29T11:57:26Z (20 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

c245372b

Parents:

229d5fc1

Message:

Add some comments to IA-32 src/boot/boot.S and src/smp.S.

Make the boot stack start on page boundary.
This is required by get_stack_base().

Define 'THE' macro.

Implement preemption_disable() and preemption_enable().

Add memory barrier macros.
IA-32 macros need support for older processors.
Non IA-32 macros are dummy.

Reduction of many #include paths.

File:

• src/preempt/preemption.c (modified) (1 diff)

src/preempt/preemption.c

@@ -29 +29 @@
 #include <preemption.h>
 #include <arch.h>
-#include <arch/atomic.h>
+#include <arch/asm.h>
 #include <arch/barrier.h>
+#include <debug.h>
 
 void preemption_disable(void)
 {
+        THE->preemption_disabled++;
+        memory_barrier();
 }
 
 void preemption_enable(void)
 {
+        ASSERT(THE->preemption_disabled);
+        memory_barrier();
+        THE->preemption_disabled--;
 }