Better fix for myisamchk --sort-index on windows

Fixed deadlock bug when doing resize of key buffer while key buffer was in active use


myisam/mi_locking.c:
  Better fix for myisamchk --sort-index on windows
mysql-test/r/symlink.result:
  Update results
mysql-test/t/symlink.test:
  Update results
mysys/mf_keycache.c:
  Fixed deadlock bug when doing resize of key buffer while key buffer was in active use
sql/ha_myisam.cc:
  simple optimization
sql/sql_show.cc:
  Fixed theoretical buffer overrun
  Reset variable properly before calling update_create_info()

1 files changed, 13 insertions, 5 deletions

diff --git a/mysys/mf_keycache.c b/mysys/mf_keycache.c
index 6a037f13f05..4cb3681b8b8 100644
--- a/mysys/mf_keycache.c
+++ b/mysys/mf_keycache.c
@@ -705,11 +705,19 @@ int flush_key_blocks(File file, enum flush_type type)
 
 static int flush_all_key_blocks()
 {
-  int error=0;
-  while (_my_blocks_changed > 0)
-    if (flush_key_blocks_int(_my_used_first->file, FLUSH_RELEASE))
-      error=1;
-  return error;
+  SEC_LINK **block, **end;
+  for (block= changed_blocks, end= block+CHANGED_BLOCKS_HASH;
+       block < end;
+       block++
+       )
+  {
+    while (*block)
+    {
+      if (flush_key_blocks_int((*block)->file, FLUSH_RELEASE))
+	return 1;
+    }
+  }
+  return 0;
 }