From 9be5f9a8698b0d902ef1281716eda73a4d8478ed Mon Sep 17 00:00:00 2001
From: "Dr. David von Oheimb" <David.von.Oheimb@siemens.com>
Date: Mon, 17 May 2021 13:24:20 +0200
Subject: Move ossl_sleep() to e_os.h and use it in apps

Fixes #15304

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15308)
---
 e_os.h | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

(limited to 'e_os.h')

diff --git a/e_os.h b/e_os.h
index 8bfc1dc..56ea62d 100644
--- a/e_os.h
+++ b/e_os.h
@@ -303,6 +303,54 @@ struct servent *getservbyname(const char *name, const char *proto);
 # endif
 /* end vxworks */
 
+/* system-specific variants defining ossl_sleep() */
+#ifdef OPENSSL_SYS_UNIX
+# include <unistd.h>
+static ossl_inline void ossl_sleep(unsigned long millis)
+{
+# ifdef OPENSSL_SYS_VXWORKS
+    struct timespec ts;
+    ts.tv_sec = (long int) (millis / 1000);
+    ts.tv_nsec = (long int) (millis % 1000) * 1000000ul;
+    nanosleep(&ts, NULL);
+# elif defined(__TANDEM)
+#  if !defined(_REENTRANT)
+#   include <cextdecs.h(PROCESS_DELAY_)>
+    /* HPNS does not support usleep for non threaded apps */
+    PROCESS_DELAY_(millis * 1000);
+#  elif defined(_SPT_MODEL_)
+#   include <spthread.h>
+#   include <spt_extensions.h>
+    usleep(millis * 1000);
+#  else
+    usleep(millis * 1000);
+#  endif
+# else
+    usleep(millis * 1000);
+# endif
+}
+#elif defined(_WIN32)
+# include <windows.h>
+static ossl_inline void ossl_sleep(unsigned long millis)
+{
+    Sleep(millis);
+}
+#else
+/* Fallback to a busy wait */
+static ossl_inline void ossl_sleep(unsigned long millis)
+{
+    struct timeval start, now;
+    unsigned long 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 /* defined OPENSSL_SYS_UNIX */
+
 /* ----------------------------- HP NonStop -------------------------------- */
 /* Required to support platform variant without getpid() and pid_t. */
 # if defined(__TANDEM) && defined(_GUARDIAN_TARGET)
-- 
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