fix public clone function to be safe and usable by applications

[musl] / src / internal / atomic.h

diff --git a/src/internal/atomic.h b/src/internal/atomic.h
index f938879..96c1552 100644 (file)
--- a/src/internal/atomic.h
+++ b/src/internal/atomic.h
@@ -315,4 +315,19 @@ static inline int a_clz_64(uint64_t x)
 }
 #endif
 
+#ifndef a_clz_32
+#define a_clz_32 a_clz_32
+static inline int a_clz_32(uint32_t x)
+{
+       x >>= 1;
+       x |= x >> 1;
+       x |= x >> 2;
+       x |= x >> 4;
+       x |= x >> 8;
+       x |= x >> 16;
+       x++;
+       return 31-a_ctz_32(x);
+}
+#endif
+
 #endif