1 files changed, 52 insertions, 0 deletions
diff --git a/src/random.cpp b/src/random.cpp
new file mode 100644
index 0000000..326a3d9
--- /dev/null
+++ b/src/random.cpp
@@ -0,0 +1,52 @@
+/*
+    Copyright (c) 2011 250bpm s.r.o.
+    Copyright (c) 2011 Other contributors as noted in the AUTHORS file
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    0MQ is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdlib.h>
+
+#include "platform.hpp"
+#if defined ZMQ_HAVE_WINDOWS
+#include "windows.hpp"
+#else
+#include <unistd.h>
+#endif
+
+#include "random.hpp"
+#include "stdint.hpp"
+#include "clock.hpp"
+
+void zmq::seed_random ()
+{
+#if defined ZMQ_HAVE_WINDOWS
+    int pid = (int) GetCurrentProcessId ();
+#else
+    int pid = (int) getpid ();
+#endif
+    srand ((unsigned int) (clock_t::now_us () + pid));
+}
+
+uint32_t zmq::generate_random ()
+{
+    //  Compensate for the fact that rand() returns signed integer.
+    uint32_t low = (uint32_t) rand ();
+    uint32_t high = (uint32_t) rand ();
+    high <<= (sizeof (int) * 8 - 1);
+    return high | low;
+}
+