From d08b195de44d2e85467de1764884c14973f92115 Mon Sep 17 00:00:00 2001
From: Josh Blum
Date: Fri, 21 Jun 2013 00:08:01 -0700
Subject: gras: first cut at time tag class

---
 include/gras/CMakeLists.txt |  1 +
 include/gras/time_tag.hpp   | 58 +++++++++++++++++++++++++++++
 lib/CMakeLists.txt          |  1 +
 lib/time_tag.cpp            | 89 +++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 149 insertions(+)
 create mode 100644 include/gras/time_tag.hpp
 create mode 100644 lib/time_tag.cpp

diff --git a/include/gras/CMakeLists.txt b/include/gras/CMakeLists.txt
index d0e3cfa..becd6cb 100644
--- a/include/gras/CMakeLists.txt
+++ b/include/gras/CMakeLists.txt
@@ -16,6 +16,7 @@ install(FILES
     sbuffer.hpp
     sbuffer.i
     tags.hpp
+    time_tag.hpp
     tags.i
     tag_iter.hpp
     tag_iter.i
diff --git a/include/gras/time_tag.hpp b/include/gras/time_tag.hpp
new file mode 100644
index 0000000..d350fa2
--- /dev/null
+++ b/include/gras/time_tag.hpp
@@ -0,0 +1,58 @@
+// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
+
+#ifndef INCLUDED_GRAS_TIME_TAG_HPP
+#define INCLUDED_GRAS_TIME_TAG_HPP
+
+#include <gras/gras.hpp>
+#include <gras/chrono.hpp>
+#include <PMC/PMC.hpp>
+#include <boost/operators.hpp>
+
+namespace gras
+{
+
+struct GRAS_API TimeTag :
+    boost::less_than_comparable<TimeTag>,
+    boost::additive<TimeTag>
+{
+    //! Default contructor - hold time 0
+    TimeTag(void);
+
+    //! Create a time tag from ticks w/ default ticks per second
+    static TimeTag from_ticks(const time_ticks_t ticks);
+
+    //! Create a time tag from ticks w/ specified ticks per second
+    static TimeTag from_ticks(const time_ticks_t ticks, const double rate);
+
+    //! Create a time tag from a PMC containing a PMCTuple<2>(uint64, double)
+    static TimeTag from_pmc(const PMCC &p);
+
+    //! Convert this time tag to ticks w/ default ticks per second
+    time_ticks_t to_ticks(void);
+
+    //! Convert this time tag to ticks w/ specified ticks per second
+    time_ticks_t to_ticks(const double rate);
+
+    //! Convert this time tag to a PMC containing a PMCTuple<2>(uint64, double)
+    PMCC to_pmc(void);
+
+    //! Addition for additive interface
+    TimeTag &operator+=(const TimeTag &);
+
+    //! Subtraction for additive interface
+    TimeTag &operator-=(const TimeTag &);
+
+    //! full seconds
+    time_ticks_t _fsecs;
+
+    //! fractional ticks
+    time_ticks_t _ticks;
+};
+
+GRAS_API bool operator<(const TimeTag &lhs, const TimeTag &rhs);
+
+GRAS_API bool operator==(const TimeTag &lhs, const TimeTag &rhs);
+
+} //namespace gras
+
+#endif /*INCLUDED_GRAS_TIME_TAG_HPP*/
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 44b3012..ab5d886 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -48,6 +48,7 @@ list(APPEND GRAS_SOURCES
     ${CMAKE_CURRENT_SOURCE_DIR}/buffer_queue_circ.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/buffer_queue_pool.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/tags.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/time_tag.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/block.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/block_config.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/block_message.cpp
diff --git a/lib/time_tag.cpp b/lib/time_tag.cpp
new file mode 100644
index 0000000..d438fc3
--- /dev/null
+++ b/lib/time_tag.cpp
@@ -0,0 +1,89 @@
+// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
+
+#include <gras/time_tag.hpp>
+#include <PMC/Containers.hpp>
+#include <boost/cstdint.hpp> //uint64
+#include <boost/math/special_functions/round.hpp>
+
+using namespace gras;
+
+static TimeTag &normalize(TimeTag &t)
+{
+    int num = int(t._ticks/time_tps());
+    if (num < 0) num--; //stops negative ticks
+    t._fsecs += num;
+    t._ticks -= num*time_tps();
+    return t;
+}
+
+TimeTag::TimeTag(void):
+    _fsecs(0), _ticks(0)
+{/*NOP*/}
+
+TimeTag TimeTag::from_ticks(const time_ticks_t ticks)
+{
+    TimeTag t;
+    t._ticks = ticks;
+    return normalize(t);
+}
+
+TimeTag TimeTag::from_ticks(const time_ticks_t ticks, const double rate)
+{
+    TimeTag t;
+    t._fsecs = time_ticks_t(ticks/rate);
+    const double error = ticks - (t._fsecs*rate);
+    t._ticks = boost::math::llround((error*time_tps())/rate);
+    return normalize(t);
+}
+
+TimeTag TimeTag::from_pmc(const PMCC &p)
+{
+    TimeTag t;
+    const PMCTuple<2> &tuple = p.as<PMCTuple<2> >();
+    t._fsecs = tuple[0].as<boost::uint64_t>();
+    t._ticks = boost::math::llround(tuple[1].as<double>()*time_tps());
+    return normalize(t);
+}
+
+time_ticks_t TimeTag::to_ticks(void)
+{
+    return _fsecs*time_tps() + _ticks;
+}
+
+time_ticks_t TimeTag::to_ticks(const double rate)
+{
+    return _fsecs*time_tps() + boost::math::llround((_ticks*rate)/time_tps());
+}
+
+PMCC TimeTag::to_pmc(void)
+{
+    PMCTuple<2> tuple;
+    tuple[0] = PMC_M<boost::uint64_t>(_fsecs);
+    tuple[1] = PMC_M<double>(_ticks/double(time_tps()));
+    return PMC_M(tuple);
+}
+
+TimeTag &TimeTag::operator+=(const TimeTag &rhs)
+{
+    _fsecs += rhs._fsecs;
+    _ticks += rhs._ticks;
+    return normalize(*this);
+}
+
+TimeTag &TimeTag::operator-=(const TimeTag &rhs)
+{
+    _fsecs -= rhs._fsecs;
+    _ticks -= rhs._ticks;
+    return normalize(*this);
+}
+
+bool gras::operator<(const TimeTag &lhs, const TimeTag &rhs)
+{
+    if (lhs._fsecs == rhs._fsecs) return lhs._ticks < rhs._ticks;
+    return lhs._fsecs < rhs._fsecs;
+}
+
+bool gras::operator==(const TimeTag &lhs, const TimeTag &rhs)
+{
+    return (lhs._fsecs == rhs._fsecs) and (lhs._ticks == rhs._ticks);
+}
-- 
cgit 


From d47f192f9edfc2332fa73e6ed6c4c1cdedefb96c Mon Sep 17 00:00:00 2001
From: Josh Blum
Date: Fri, 21 Jun 2013 00:33:31 -0700
Subject: gras: adding pythonic interface to time tag

---
 include/gras/CMakeLists.txt |  3 ++-
 include/gras/time_tag.hpp   |  7 +++++++
 include/gras/time_tag.i     | 39 +++++++++++++++++++++++++++++++++++++++
 lib/serialize_types.cpp     | 15 +++++++++++++++
 python/gras/CMakeLists.txt  |  2 ++
 python/gras/GRAS_TimeTag.i  | 14 ++++++++++++++
 python/gras/__init__.py     |  1 +
 7 files changed, 80 insertions(+), 1 deletion(-)
 create mode 100644 include/gras/time_tag.i
 create mode 100644 python/gras/GRAS_TimeTag.i

diff --git a/include/gras/CMakeLists.txt b/include/gras/CMakeLists.txt
index becd6cb..176d5e5 100644
--- a/include/gras/CMakeLists.txt
+++ b/include/gras/CMakeLists.txt
@@ -16,8 +16,9 @@ install(FILES
     sbuffer.hpp
     sbuffer.i
     tags.hpp
-    time_tag.hpp
     tags.i
+    time_tag.hpp
+    time_tag.i
     tag_iter.hpp
     tag_iter.i
     thread_pool.hpp
diff --git a/include/gras/time_tag.hpp b/include/gras/time_tag.hpp
index d350fa2..9459f9f 100644
--- a/include/gras/time_tag.hpp
+++ b/include/gras/time_tag.hpp
@@ -11,6 +11,13 @@
 namespace gras
 {
 
+/*!
+ * TimeTag represents an absolute time or a time delta.
+ * A TimeTag can be converted to and from a tick count.
+ * Conversion support is provided for the pseudo-standard
+ * PMCTuple format often used inside a StreamTag value.
+ * And TimeTag supports overloaded arithmetic operations.
+ */
 struct GRAS_API TimeTag :
     boost::less_than_comparable<TimeTag>,
     boost::additive<TimeTag>
diff --git a/include/gras/time_tag.i b/include/gras/time_tag.i
new file mode 100644
index 0000000..fb3d721
--- /dev/null
+++ b/include/gras/time_tag.i
@@ -0,0 +1,39 @@
+// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
+
+#ifndef INCLUDED_GRAS_TIME_TAG_I
+#define INCLUDED_GRAS_TIME_TAG_I
+
+%{
+#include <gras/time_tag.hpp>
+%}
+
+////////////////////////////////////////////////////////////////////////
+// remove base class warning -- boost::less_than_comparable<TimeTag>
+// remove base class warning -- boost::additive<TimeTag>
+////////////////////////////////////////////////////////////////////////
+#pragma SWIG nowarn=401
+
+%include <gras/gras.hpp>
+%include <gras/chrono.hpp>
+%include <gras/time_tag.hpp>
+%import <PMC/PMC.i>
+
+////////////////////////////////////////////////////////////////////////
+// Make it pythonic
+////////////////////////////////////////////////////////////////////////
+%extend gras::TimeTag
+{
+    bool __nonzero__(void)
+    {
+        return ($self)->to_ticks() != 0;
+    }
+
+    int __cmp__(const TimeTag &other)
+    {
+        if ((*($self)) < other) return -1;
+        if ((*($self)) > other) return +1;
+        return 0;
+    }
+}
+
+#endif /*INCLUDED_GRAS_TIME_TAG_I*/
diff --git a/lib/serialize_types.cpp b/lib/serialize_types.cpp
index afa9481..fde7277 100644
--- a/lib/serialize_types.cpp
+++ b/lib/serialize_types.cpp
@@ -2,6 +2,7 @@
 
 #include <gras/sbuffer.hpp>
 #include <gras/tags.hpp>
+#include <gras/time_tag.hpp>
 #include <PMC/Serialize.hpp>
 #include <boost/serialization/split_free.hpp>
 #include <boost/serialization/string.hpp>
@@ -82,3 +83,17 @@ void serialize(Archive &ar, gras::StreamTag &t, const unsigned int)
 }}
 
 PMC_SERIALIZE_EXPORT(gras::StreamTag, "PMC<gras::StreamTag>")
+
+/***********************************************************************
+ * support for time tag type
+ **********************************************************************/
+namespace boost { namespace serialization {
+template <class Archive>
+void serialize(Archive &ar, gras::TimeTag &t, const unsigned int)
+{
+    ar & t._fsecs;
+    ar & t._ticks;
+}
+}}
+
+PMC_SERIALIZE_EXPORT(gras::TimeTag, "PMC<gras::TimeTag>")
diff --git a/python/gras/CMakeLists.txt b/python/gras/CMakeLists.txt
index 8171e7f..a7fc8f3 100644
--- a/python/gras/CMakeLists.txt
+++ b/python/gras/CMakeLists.txt
@@ -19,6 +19,7 @@ set(GR_SWIG_LIBRARIES gras)
 file(GLOB GR_SWIG_SOURCE_DEPS "${GRAS_SOURCE_DIR}/include/gras/*.i")
 
 GR_SWIG_MAKE(GRAS_Tags GRAS_Tags.i)
+GR_SWIG_MAKE(GRAS_TimeTag GRAS_TimeTag.i)
 GR_SWIG_MAKE(GRAS_Block GRAS_Block.i)
 GR_SWIG_MAKE(GRAS_HierBlock GRAS_HierBlock.i)
 GR_SWIG_MAKE(GRAS_ThreadPool GRAS_ThreadPool.i)
@@ -26,6 +27,7 @@ GR_SWIG_MAKE(GRAS_SBuffer GRAS_SBuffer.i)
 GR_SWIG_INSTALL(
     TARGETS
     GRAS_Tags
+    GRAS_TimeTag
     GRAS_Block
     GRAS_HierBlock
     GRAS_ThreadPool
diff --git a/python/gras/GRAS_TimeTag.i b/python/gras/GRAS_TimeTag.i
new file mode 100644
index 0000000..3b77dfb
--- /dev/null
+++ b/python/gras/GRAS_TimeTag.i
@@ -0,0 +1,14 @@
+// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
+
+
+%include <gras/time_tag.i>
+
+%include <PMC/Registry.i>
+
+DECL_PMC_SWIG_TYPE(gras::TimeTag, swig_time_tag)
+
+%pythoncode %{
+from GRAS_TimeTag import TimeTag
+%}
+
+REG_PMC_SWIG_TYPE(swig_time_tag, TimeTag)
diff --git a/python/gras/__init__.py b/python/gras/__init__.py
index 33d2b00..cf2c7f5 100644
--- a/python/gras/__init__.py
+++ b/python/gras/__init__.py
@@ -3,6 +3,7 @@
 from PMC import *
 from GRAS_SBuffer import SBufferConfig, SBuffer
 from GRAS_Tags import Tag, StreamTag, PacketMsg
+from GRAS_TimeTag import TimeTag
 from GRAS_Block import Block
 from GRAS_HierBlock import HierBlock, TopBlock
 from GRAS_ThreadPool import ThreadPoolConfig, ThreadPool
-- 
cgit 


From 90579c89748704dc1d7e9d80120c42988481197c Mon Sep 17 00:00:00 2001
From: Josh Blum
Date: Fri, 21 Jun 2013 18:45:45 -0700
Subject: gras: added unit tests for time tags

---
 include/gras/time_tag.i       | 10 ++++++
 tests/CMakeLists.txt          |  1 +
 tests/serialize_tags_test.cpp |  9 ++++++
 tests/time_tags_test.py       | 74 +++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 94 insertions(+)
 create mode 100644 tests/time_tags_test.py

diff --git a/include/gras/time_tag.i b/include/gras/time_tag.i
index fb3d721..42deed7 100644
--- a/include/gras/time_tag.i
+++ b/include/gras/time_tag.i
@@ -34,6 +34,16 @@
         if ((*($self)) > other) return +1;
         return 0;
     }
+
+    TimeTag __add__(const TimeTag &other)
+    {
+        return (*($self)) + other;
+    }
+
+    TimeTag __sub__(const TimeTag &other)
+    {
+        return (*($self)) - other;
+    }
 }
 
 #endif /*INCLUDED_GRAS_TIME_TAG_I*/
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 761239e..bc3815e 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -47,3 +47,4 @@ GR_ADD_TEST(thread_pool_test ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/th
 GR_ADD_TEST(sbuffer_test ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/sbuffer_test.py)
 GR_ADD_TEST(query_test ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/query_test.py)
 GR_ADD_TEST(block_props_test ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/block_props_test.py)
+GR_ADD_TEST(time_tags_test ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/time_tags_test.py)
diff --git a/tests/serialize_tags_test.cpp b/tests/serialize_tags_test.cpp
index 58d9b1e..b4f9ec2 100644
--- a/tests/serialize_tags_test.cpp
+++ b/tests/serialize_tags_test.cpp
@@ -7,6 +7,7 @@
 #include <PMC/PMC.hpp>
 #include <PMC/Serialize.hpp>
 #include <gras/tags.hpp>
+#include <gras/time_tag.hpp>
 
 #include <cstdlib>
 
@@ -65,3 +66,11 @@ BOOST_AUTO_TEST_CASE(test_pkt_msg_type)
     BOOST_CHECK(pkt_msg.info.eq(result_msg.info));
     BOOST_CHECK(std::memcmp(pkt_msg.buff.get(), result_msg.buff.get(), pkt_msg.buff.length) == 0);
 }
+
+BOOST_AUTO_TEST_CASE(test_time_tag_type)
+{
+    const gras::TimeTag t0 = gras::TimeTag::from_ticks(42);
+    PMCC result = loopback_test(PMC_M(t0));
+    const gras::TimeTag &t1 = result.as<gras::TimeTag>();
+    BOOST_CHECK(t0 == t1);
+}
diff --git a/tests/time_tags_test.py b/tests/time_tags_test.py
new file mode 100644
index 0000000..7d0221f
--- /dev/null
+++ b/tests/time_tags_test.py
@@ -0,0 +1,74 @@
+# Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
+
+import unittest
+import gras
+import numpy
+import time
+
+class TimeTagsTest(unittest.TestCase):
+
+    def test_make_time_tag(self):
+        t0 = gras.TimeTag()
+
+    def test_make_time_tag_from_ticks(self):
+        t0 = gras.TimeTag.from_ticks(42)
+        self.assertEqual(t0.to_ticks(), 42)
+
+        t1 = gras.TimeTag.from_ticks(1000, 1e9)
+        self.assertEqual(t1.to_ticks(1e9), 1000)
+
+        t2 = gras.TimeTag.from_ticks(-1000, 1e9)
+        self.assertEqual(t2.to_ticks(1e9), -1000)
+
+        time_ns_now = long(time.time()*1e9)
+        t3 = gras.TimeTag.from_ticks(time_ns_now, 1e9)
+        self.assertEqual(t3.to_ticks(1e9), time_ns_now)
+
+    def test_time_tag_compare(self):
+        t0 = gras.TimeTag.from_ticks(42)
+        t1 = gras.TimeTag.from_ticks(-1000)
+        self.assertEqual(t0, t0)
+        self.assertEqual(t1, t1)
+        self.assertGreater(t0, t1)
+        self.assertLess(t1, t0)
+
+    def test_time_tag_add(self):
+        t0 = gras.TimeTag.from_ticks(42)
+        t1 = gras.TimeTag.from_ticks(-1000)
+        t2 = t0 + t1
+        self.assertEqual(t2.to_ticks(), (42 + -1000))
+
+        t3 = gras.TimeTag.from_ticks(99)
+        t4 = gras.TimeTag.from_ticks(-98)
+        t3 += t4
+        self.assertEqual(t3.to_ticks(), (99 + -98))
+
+    def test_time_tag_sub(self):
+        t0 = gras.TimeTag.from_ticks(42)
+        t1 = gras.TimeTag.from_ticks(-1000)
+        t2 = t0 - t1
+        self.assertEqual(t2.to_ticks(), (42 + 1000))
+
+        t3 = gras.TimeTag.from_ticks(99)
+        t4 = gras.TimeTag.from_ticks(-98)
+        t3 -= t4
+        self.assertEqual(t3.to_ticks(), (99 + 98))
+
+    def test_time_tag_pmc_foo(self):
+        time_us_now = long(time.time()*1e6)
+        t0 = gras.TimeTag.from_ticks(time_us_now, 1e6)
+
+        #test the validity of the time tuple
+        p0 = t0.to_pmc()
+        tp = p0()
+        full = long(time_us_now/1e6)
+        self.assertEqual(tp[0], full)
+        delta = time_us_now - full*long(1e6)
+        self.assertEqual(tp[1], (delta/1e6))
+
+        #and check if it loops back
+        t1 = gras.TimeTag.from_pmc(p0)
+        self.assertEqual(t0, t1)
+
+if __name__ == '__main__':
+    unittest.main()
-- 
cgit