Author: Remi Meier
Branch: c7
Changeset: r709:1a1f89d3003c
Date: 2014-02-07 15:46 +0100
http://bitbucket.org/pypy/stmgc/changeset/1a1f89d3003c/
Log: another comment
diff --git a/c7/core.h b/c7/core.h
--- a/c7/core.h
+++ b/c7/core.h
@@ -200,6 +200,10 @@
static inline void write_fence(void)
{
#if defined(__amd64__) || defined(__i386__)
+ /* this is only a compiler barrier
+ use __sync_synchronize(...) or other __sync_OPs that
+ are locked by the CPU if you need to prevent
+ loads to be moved before stores to different locations */
asm("" : : : "memory");
#else
# error "Define write_fence() for your architecture"
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