1 files changed, 65 insertions, 0 deletions
diff --git a/erts/emulator/beam/code_ix.h b/erts/emulator/beam/code_ix.h
new file mode 100644
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+++ b/erts/emulator/beam/code_ix.h
@@ -0,0 +1,65 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2012-2012. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ */
+#ifndef __CODE_IX_H__
+#define __CODE_IX_H__
+
+
+#define ERTS_NUM_CODE_IX 3
+typedef unsigned ErtsCodeIndex;
+
+void erts_code_ix_init(void);
+ErtsCodeIndex erts_active_code_ix(void);
+ErtsCodeIndex erts_loader_code_ix(void);
+
+/* Lock code_ix (enqueue and suspend until we get it)
+*/
+void erts_lock_code_ix(void);
+
+/*SVERK
+    erts_lock_code_ix();
+    wait for thread progress
+	   (we don't want any retarded threads with pointers to inactive Module)
+    Copy active -> loader
+	rlock old_code while copying Modules
+    Update loader
+    wait for thread progress
+	   (we need a membarrier for everybody to "see" the new code)
+    Set loader as new active
+    erts_unlock_code_ix();
+}*/
+
+
+/* Unlock code_ix (resume first waiter)
+*/
+void erts_unlock_code_ix(void);
+void erts_start_loader_code_ix(void);
+void erts_commit_loader_code_ix(void);
+void erts_abort_loader_code_ix(void);
+
+void erts_rwlock_old_code(void);
+void erts_rwunlock_old_code(void);
+void erts_rlock_old_code(void);
+void erts_runlock_old_code(void);
+
+#ifdef ERTS_ENABLE_LOCK_CHECK
+int erts_is_old_code_rlocked(void);
+int erts_is_code_ix_locked(void);
+#endif
+
+#endif /* !__CODE_IX_H__ */