Move the static_assert definition to its own header

2 files changed, 19 insertions, 0 deletions

diff --git a/include/atomic.h b/include/atomic.h
index 3b5ec24d..3915dfd5 100644
--- a/include/atomic.h
+++ b/include/atomic.h
@@ -1,6 +1,8 @@
 #ifndef AL_ATOMIC_H
 #define AL_ATOMIC_H
 
+#include "static_assert.h"
+
 
 typedef void *volatile XchgPtr;
 
diff --git a/include/static_assert.h b/include/static_assert.h
new file mode 100644
index 00000000..65283cf0
--- /dev/null
+++ b/include/static_assert.h
@@ -0,0 +1,17 @@
+#ifndef AL_STATIC_ASSERT_H
+#define AL_STATIC_ASSERT_H
+
+#include <assert.h>
+
+
+#ifndef static_assert
+#ifdef HAVE_C11_STATIC_ASSERT
+#define static_assert _Static_assert
+#else
+#define CTASTR2(_pre,_post) _pre##_post
+#define CTASTR(_pre,_post) CTASTR2(_pre,_post)
+#define static_assert(_cond, _msg) typedef struct { int CTASTR(static_assert_failed_at_line_,__LINE__) : !!(_cond); } CTASTR(static_assertion_,__COUNTER__)
+#endif
+#endif
+
+#endif /* AL_STATIC_ASSERT_H */