Author: Armin Rigo <[email protected]>
Branch: weakref
Changeset: r413:de1a136dd7eb
Date: 2013-07-18 17:14 +0200
http://bitbucket.org/pypy/stmgc/changeset/de1a136dd7eb/
Log: Comment
diff --git a/c4/stmgc.h b/c4/stmgc.h
--- a/c4/stmgc.h
+++ b/c4/stmgc.h
@@ -115,7 +115,9 @@
/* weakref support: allocate a weakref object, and set it to point
weakly to 'obj'. The weak pointer offset is hard-coded to be at
- 'size - WORD'. Important: stmcb_trace() must NOT trace it. */
+ 'size - WORD'. Important: stmcb_trace() must NOT trace it.
+ Weakrefs are *immutable*! Don't attempt to use stm_write_barrier()
+ on them. */
gcptr stm_weakref_allocate(size_t size, unsigned long tid, gcptr obj);
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