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-rw-r--r--coroutine/Stack.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/coroutine/Stack.h b/coroutine/Stack.h
index f0fc703622..b3f57dcaaa 100644
--- a/coroutine/Stack.h
+++ b/coroutine/Stack.h
@@ -1,3 +1,6 @@
+#ifndef COROUTINE_STACK_H
+#define COROUTINE_STACK_H 1
+
/*
* This file is part of the "Coroutine" project and released under the MIT License.
*
@@ -14,3 +17,5 @@
#define COROUTINE_STACK_LOCAL(type, name) type name##_local; type * name = &name##_local
#define COROUTINE_STACK_FREE(name)
#endif
+
+#endif /* COROUTINE_STACK_H */