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authorLuca Muscariello <lumuscar+fdio@cisco.com>2017-02-25 23:42:31 +0100
committerLuca Muscariello <lumuscar+fdio@cisco.com>2017-02-25 23:42:31 +0100
commit05c1a838c881ea502888659848d8792843b28718 (patch)
treecf0b05b58bd725a1eb6c80325ba986c63dea42aa /websocketpp/random
parent9b30fc10fb1cbebe651e5a107e8ca5b24de54675 (diff)
Initial commit: video player - viper
Change-Id: Id5aa33598ce34659bad4a7a9ae5006bfb84f9bd1 Signed-off-by: Luca Muscariello <lumuscar+fdio@cisco.com>
Diffstat (limited to 'websocketpp/random')
-rw-r--r--websocketpp/random/none.hpp60
-rw-r--r--websocketpp/random/random_device.hpp80
2 files changed, 140 insertions, 0 deletions
diff --git a/websocketpp/random/none.hpp b/websocketpp/random/none.hpp
new file mode 100644
index 00000000..2163e6f4
--- /dev/null
+++ b/websocketpp/random/none.hpp
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2014, Peter Thorson. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the WebSocket++ Project nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef WEBSOCKETPP_RANDOM_NONE_HPP
+#define WEBSOCKETPP_RANDOM_NONE_HPP
+
+namespace websocketpp {
+/// Random number generation policies
+namespace random {
+/// Stub RNG policy that always returns 0
+namespace none {
+
+/// Thread safe stub "random" integer generator.
+/**
+ * This template class provides a random integer stub. The interface mimics the
+ * WebSocket++ RNG generator classes but the generater function always returns
+ * zero. This can be used to stub out the RNG for unit and performance testing.
+ *
+ * Call operator() to generate the next number
+ */
+template <typename int_type>
+class int_generator {
+ public:
+ int_generator() {}
+
+ /// advances the engine's state and returns the generated value
+ int_type operator()() {
+ return 0;
+ }
+};
+
+} // namespace none
+} // namespace random
+} // namespace websocketpp
+
+#endif //WEBSOCKETPP_RANDOM_NONE_HPP
diff --git a/websocketpp/random/random_device.hpp b/websocketpp/random/random_device.hpp
new file mode 100644
index 00000000..91e7dd16
--- /dev/null
+++ b/websocketpp/random/random_device.hpp
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2014, Peter Thorson. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the WebSocket++ Project nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef WEBSOCKETPP_RANDOM_RANDOM_DEVICE_HPP
+#define WEBSOCKETPP_RANDOM_RANDOM_DEVICE_HPP
+
+#include <websocketpp/common/random.hpp>
+
+namespace websocketpp {
+namespace random {
+/// RNG policy based on std::random_device or boost::random_device
+namespace random_device {
+
+/// Thread safe non-deterministic random integer generator.
+/**
+ * This template class provides thread safe non-deterministic random integer
+ * generation. Numbers are produced in a uniformly distributed range from the
+ * smallest to largest value that int_type can store.
+ *
+ * Thread-safety is provided via locking based on the concurrency template
+ * parameter.
+ *
+ * Non-deterministic RNG is provided via websocketpp::lib which uses either
+ * C++11 or Boost 1.47+'s random_device class.
+ *
+ * Call operator() to generate the next number
+ */
+template <typename int_type, typename concurrency>
+class int_generator {
+ public:
+ typedef typename concurrency::scoped_lock_type scoped_lock_type;
+ typedef typename concurrency::mutex_type mutex_type;
+
+ /// constructor
+ //mac TODO: figure out if signed types present a range problem
+ int_generator() {}
+
+ /// advances the engine's state and returns the generated value
+ int_type operator()() {
+ scoped_lock_type guard(m_lock);
+ return m_dis(m_rng);
+ }
+ private:
+
+
+ lib::random_device m_rng;
+ lib::uniform_int_distribution<int_type> m_dis;
+
+ mutex_type m_lock;
+};
+
+} // namespace random_device
+} // namespace random
+} // namespace websocketpp
+
+#endif //WEBSOCKETPP_RANDOM_RANDOM_DEVICE_HPP