+#include "e_os.h"
+
+#ifdef OPENSSL_SYS_UNIX
+# include <unistd.h>
+
+static ossl_inline void ossl_sleep(unsigned int millis) {
+ usleep(millis * 1000);
+}
+#elif defined(_WIN32)
+# include <windows.h>
+
+static ossl_inline void ossl_sleep(unsigned int millis) {
+ Sleep(millis);
+}
+#else
+/* Fallback to a busy wait */
+static ossl_inline void ossl_sleep(unsigned int millis) {
+ struct timeval start, now;
+ unsigned int elapsedms;
+
+ gettimeofday(&start, NULL);
+ do {
+ gettimeofday(&now, NULL);
+ elapsedms = (((now.tv_sec - start.tv_sec) * 1000000)
+ + now.tv_usec - start.tv_usec) / 1000;
+ } while (elapsedms < millis);
+}
+#endif