base: Declare a type for context IDs

Context IDs used to be declared as ad hoc (usually as int). This
changeset introduces a typedef for ContextIDs and a constant for
invalid context IDs.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/cpu/o3/thread_context.hh b/src/cpu/o3/thread_context.hh
index 87d87900c..87b7d9198 100755
--- a/src/cpu/o3/thread_context.hh
+++ b/src/cpu/o3/thread_context.hh
@@ -101,7 +101,7 @@ class O3ThreadContext : public ThreadContext
     /** Reads this CPU's Socket ID. */
     virtual uint32_t socketId() const { return cpu->socketId(); }
 
-    virtual int contextId() const { return thread->contextId(); }
+    virtual ContextID contextId() const { return thread->contextId(); }
 
     virtual void setContextId(int id) { thread->setContextId(id); }