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.
diff --git a/src/base/types.hh b/src/base/types.hh
index 3d53e6b..bc5c715 100644
--- a/src/base/types.hh
+++ b/src/base/types.hh
@@ -181,6 +181,10 @@
typedef int16_t ThreadID;
const ThreadID InvalidThreadID = (ThreadID)-1;
+/** Globally unique thread context ID */
+typedef int ContextID;
+const ContextID InvalidContextID = (ContextID)-1;
+
/**
* Port index/ID type, and a symbolic name for an invalid port id.
*/
