+int bt_munmap(void *addr, size_t length);
+
+#else /* __MINGW32__ */
+
+#include <sys/mman.h>
+
+static inline
+void *bt_mmap(void *addr, size_t length, int prot, int flags, int fd,
+ off_t offset)
+{
+ return (void *) mmap(addr, length, prot, flags, fd, offset);
+}
+
+static inline
+int bt_munmap(void *addr, size_t length)
+{
+ return munmap(addr, length);
+}