├── ChannelsCPP
    ├── IChannel.cpp
    ├── OChannel.cpp
    ├── ChannelBuffer.cpp
    ├── ChannelUtility.cpp
    ├── Circular_buffer.cpp
    ├── Channel.cpp
    ├── OChannel.h
    ├── ChannelsCPP.vcxproj.filters
    ├── Circular_buffer.h
    ├── ChannelBuffer.h
    ├── ChannelUtility.h
    ├── IChannel.h
    ├── Source.cpp
    ├── Channel.h
    └── ChannelsCPP.vcxproj
├── CMakeLists.txt
├── LICENSE
├── ChannelsCPP.sln
├── .gitattributes
├── .gitignore
└── README.md


/ChannelsCPP/IChannel.cpp:
--------------------------------------------------------------------------------
1 | #include "IChannel.h"
2 | 


--------------------------------------------------------------------------------
/ChannelsCPP/OChannel.cpp:
--------------------------------------------------------------------------------
1 | #include "OChannel.h"
2 | 
3 | 
4 | 


--------------------------------------------------------------------------------
/ChannelsCPP/ChannelBuffer.cpp:
--------------------------------------------------------------------------------
1 | #include "ChannelBuffer.h"
2 | 
3 | 


--------------------------------------------------------------------------------
/ChannelsCPP/ChannelUtility.cpp:
--------------------------------------------------------------------------------
1 | #include "ChannelUtility.h"
2 | 
3 | 


--------------------------------------------------------------------------------
/ChannelsCPP/Circular_buffer.cpp:
--------------------------------------------------------------------------------
1 | #include "Circular_buffer.h"
2 | 
3 | 
4 | 


--------------------------------------------------------------------------------
/CMakeLists.txt:
--------------------------------------------------------------------------------
1 | cmake_minimum_required (VERSION 3.5)
2 |   
3 | set (CMAKE_CXX_STANDARD 14)
4 | set (CMAKE_EXE_LINKER_FLAGS "-fsanitize=address,undefined")
5 | add_executable(ChannelsTest ChannelsCPP/Source.cpp ChannelsCPP/Channel.cpp)
6 | target_link_libraries(ChannelsTest PUBLIC pthread)
7 | target_compile_options(ChannelsTest PRIVATE "-fsanitize=address,undefined")
8 | 


--------------------------------------------------------------------------------
/ChannelsCPP/Channel.cpp:
--------------------------------------------------------------------------------
 1 | #include "Channel.h"
 2 | using namespace go;
 3 | 
 4 | 
 5 | /*template<typename T, unsigned int buffSize>
 6 | T chan::Channel<T, buffSize>::getNextValue()
 7 | {
 8 | 	return T();
 9 | }
10 | 
11 | template<typename T, unsigned int buffSize>
12 | chan::Channel<T, buffSize>::Channel()
13 | {
14 | }
15 | 
16 | template<typename T, unsigned int buffSize>
17 | chan::Channel<T, buffSize>::~Channel()
18 | {
19 | }
20 | */
21 | 
22 | template<typename T, std::size_t Buffer_Size>
23 | T& operator<<(Chan<T, Buffer_Size>& ch, const T& obj)
24 | {
25 | 	ch.insertValue(obj);
26 | 	return ch;
27 | }
28 | 
29 | 
30 | template<typename T, std::size_t Buffer_Size>
31 | Chan<T, Buffer_Size>& operator >> (Chan<T, Buffer_Size>& ch, T& obj)
32 | {
33 | 	obj = ch.getNextValue();
34 | 	return obj;
35 | 
36 | }


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
 1 | MIT License
 2 | 
 3 | Copyright (c) 2018 Francis Lemaire
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


--------------------------------------------------------------------------------
/ChannelsCPP.sln:
--------------------------------------------------------------------------------
 1 | 
 2 | Microsoft Visual Studio Solution File, Format Version 12.00
 3 | # Visual Studio 14
 4 | VisualStudioVersion = 14.0.25420.1
 5 | MinimumVisualStudioVersion = 10.0.40219.1
 6 | Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "ChannelsCPP", "ChannelsCPP\ChannelsCPP.vcxproj", "{85F0720E-320F-4216-B74C-DF2B218A2D4D}"
 7 | EndProject
 8 | Global
 9 | 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
10 | 		Debug|x64 = Debug|x64
11 | 		Debug|x86 = Debug|x86
12 | 		Release|x64 = Release|x64
13 | 		Release|x86 = Release|x86
14 | 	EndGlobalSection
15 | 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
16 | 		{85F0720E-320F-4216-B74C-DF2B218A2D4D}.Debug|x64.ActiveCfg = Debug|x64
17 | 		{85F0720E-320F-4216-B74C-DF2B218A2D4D}.Debug|x64.Build.0 = Debug|x64
18 | 		{85F0720E-320F-4216-B74C-DF2B218A2D4D}.Debug|x86.ActiveCfg = Debug|Win32
19 | 		{85F0720E-320F-4216-B74C-DF2B218A2D4D}.Debug|x86.Build.0 = Debug|Win32
20 | 		{85F0720E-320F-4216-B74C-DF2B218A2D4D}.Release|x64.ActiveCfg = Release|x64
21 | 		{85F0720E-320F-4216-B74C-DF2B218A2D4D}.Release|x64.Build.0 = Release|x64
22 | 		{85F0720E-320F-4216-B74C-DF2B218A2D4D}.Release|x86.ActiveCfg = Release|Win32
23 | 		{85F0720E-320F-4216-B74C-DF2B218A2D4D}.Release|x86.Build.0 = Release|Win32
24 | 	EndGlobalSection
25 | 	GlobalSection(SolutionProperties) = preSolution
26 | 		HideSolutionNode = FALSE
27 | 	EndGlobalSection
28 | EndGlobal
29 | 


--------------------------------------------------------------------------------
/ChannelsCPP/OChannel.h:
--------------------------------------------------------------------------------
 1 | #pragma once
 2 | 
 3 | #include "ChannelBuffer.h"
 4 | 
 5 | namespace go
 6 | {
 7 | 	template<typename T, std::size_t Buffer_Size> class IChan;
 8 | 
 9 | 	template<typename T, std::size_t Buffer_Size = 0>
10 | 	class OChan //: private Chan<T>
11 | 	{
12 | 	protected:
13 | 		std::shared_ptr<internal::ChannelBuffer<T, Buffer_Size>> m_buffer;
14 | 		OChan(std::shared_ptr<internal::ChannelBuffer<T, Buffer_Size>> buffer) : m_buffer(buffer) {}
15 | 	public:
16 | 		OChan() = default;
17 | 		OChan(const OChan<T, Buffer_Size>& ch) = default;// :m_buffer(ch.m_buffer) {}
18 | 		OChan(OChan<T, Buffer_Size>&& ch) { swap(m_buffer, ch.m_buffer); }
19 | 											//Insert in channel
20 | 		friend 	OChan<T, Buffer_Size>& operator<<(OChan<T, Buffer_Size>& ch, const T& obj)
21 | 		{
22 | 			ch.m_buffer->insertValue(obj);
23 | 			return ch;
24 | 		}
25 | 		friend 	OChan<T, Buffer_Size>& operator >> (const T& obj, OChan<T, Buffer_Size>& ch)
26 | 		{
27 | 			ch.m_buffer->insertValue(obj);
28 | 			return  ch;
29 | 
30 | 		}
31 | 
32 | 		template<std::size_t IBuffer_Size>
33 | 		friend 	OChan<T, Buffer_Size>& operator<<(OChan<T, Buffer_Size>& ch, const IChan<T, IBuffer_Size>& obj)
34 | 		{
35 | 			T temp;
36 | 			temp << obj;
37 | 			ch << temp;
38 | 			return ch;
39 | 		}
40 | 
41 | 		template<std::size_t IBuffer_Size>
42 | 		friend 	OChan<T, Buffer_Size>& operator >> (const IChan<T, IBuffer_Size>& obj, OChan<T, Buffer_Size>& ch)
43 | 		{
44 | 			T temp;
45 | 			temp << obj;
46 | 			ch << temp;
47 | 			return  ch;
48 | 
49 | 		}
50 | 
51 | 		//Stream
52 | 		friend std::ostream& operator<<(std::ostream& os, OChan<T, Buffer_Size>& ch)
53 | 		{
54 | 			os << ch.m_buffer->getNextValue();
55 | 			return os;
56 | 		}
57 | 
58 | 		void close()
59 | 		{
60 | 			m_buffer->close();
61 | 		}
62 | 	};
63 | 
64 | }


--------------------------------------------------------------------------------
/ChannelsCPP/ChannelsCPP.vcxproj.filters:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 3 |   <ItemGroup>
 4 |     <Filter Include="Fichiers sources">
 5 |       <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
 6 |       <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
 7 |     </Filter>
 8 |     <Filter Include="Fichiers d%27en-tête">
 9 |       <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
10 |       <Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
11 |     </Filter>
12 |     <Filter Include="Fichiers de ressources">
13 |       <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
14 |       <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
15 |     </Filter>
16 |   </ItemGroup>
17 |   <ItemGroup>
18 |     <ClCompile Include="Source.cpp">
19 |       <Filter>Fichiers sources</Filter>
20 |     </ClCompile>
21 |     <ClCompile Include="Channel.cpp">
22 |       <Filter>Fichiers sources</Filter>
23 |     </ClCompile>
24 |     <ClCompile Include="ChannelUtility.cpp">
25 |       <Filter>Fichiers sources</Filter>
26 |     </ClCompile>
27 |     <ClCompile Include="IChannel.cpp">
28 |       <Filter>Fichiers sources</Filter>
29 |     </ClCompile>
30 |     <ClCompile Include="OChannel.cpp">
31 |       <Filter>Fichiers sources</Filter>
32 |     </ClCompile>
33 |     <ClCompile Include="ChannelBuffer.cpp">
34 |       <Filter>Fichiers sources</Filter>
35 |     </ClCompile>
36 |     <ClCompile Include="Circular_buffer.cpp">
37 |       <Filter>Fichiers sources</Filter>
38 |     </ClCompile>
39 |   </ItemGroup>
40 |   <ItemGroup>
41 |     <ClInclude Include="Channel.h">
42 |       <Filter>Fichiers d%27en-tête</Filter>
43 |     </ClInclude>
44 |     <ClInclude Include="ChannelUtility.h">
45 |       <Filter>Fichiers d%27en-tête</Filter>
46 |     </ClInclude>
47 |     <ClInclude Include="IChannel.h">
48 |       <Filter>Fichiers d%27en-tête</Filter>
49 |     </ClInclude>
50 |     <ClInclude Include="OChannel.h">
51 |       <Filter>Fichiers d%27en-tête</Filter>
52 |     </ClInclude>
53 |     <ClInclude Include="ChannelBuffer.h">
54 |       <Filter>Fichiers d%27en-tête</Filter>
55 |     </ClInclude>
56 |     <ClInclude Include="Circular_buffer.h">
57 |       <Filter>Fichiers d%27en-tête</Filter>
58 |     </ClInclude>
59 |   </ItemGroup>
60 | </Project>


--------------------------------------------------------------------------------
/ChannelsCPP/Circular_buffer.h:
--------------------------------------------------------------------------------
  1 | #pragma once
  2 | #include<iostream>
  3 | #include<memory>
  4 | #include <stdexcept>
  5 | namespace go
  6 | {
  7 | 	namespace internal
  8 | 	{
  9 | 		template<typename T, std::size_t Buffer_Size>
 10 | 		class Circular_buffer
 11 | 		{
 12 | 			typedef T& reference;
 13 | 			typedef const T& const_reference;
 14 | 			typedef T* pointer;
 15 | 			typedef const T* const_pointer;
 16 | 			typedef decltype(Buffer_Size) syze_type;
 17 | 
 18 | 			std::unique_ptr<T[]> m_buffer;
 19 | 			pointer m_front;
 20 | 			pointer m_end;
 21 | 			size_t m_size;
 22 | 
 23 | 			void increment(pointer& p)const
 24 | 			{
 25 | 				if (p + 1 == &m_buffer[0] + Buffer_Size)
 26 | 				{
 27 | 					p = &m_buffer[0];
 28 | 				}
 29 | 				else
 30 | 				{
 31 | 					++p;
 32 | 				}
 33 | 			}
 34 | 		public:
 35 | 			Circular_buffer()
 36 | 				:m_buffer(new T[Buffer_Size]),
 37 | 				m_front(&m_buffer[0]),
 38 | 				m_end(&m_buffer[0]),
 39 | 				m_size(0)
 40 | 			{
 41 | 
 42 | 			}
 43 | 
 44 | 			~Circular_buffer()
 45 | 			{
 46 | 				m_front = nullptr;
 47 | 				m_end = nullptr;
 48 | 
 49 | 			}
 50 | 
 51 | 			bool empty() const
 52 | 			{
 53 | 				return m_size <= 0;
 54 | 			}
 55 | 
 56 | 			bool full() const
 57 | 			{
 58 | 				return m_size == Buffer_Size;
 59 | 			}
 60 | 
 61 | 			T& front()
 62 | 			{
 63 | 				if (empty())
 64 | 					throw std::out_of_range("container is empty");
 65 | 				return *m_front;
 66 | 			}
 67 | 
 68 | 			const T& front() const
 69 | 			{
 70 | 				if (empty())
 71 | 					throw std::out_of_range("container is empty");
 72 | 				return *m_front;
 73 | 			}
 74 | 
 75 | 			const T& back() const
 76 | 			{
 77 | 				if (empty())
 78 | 					throw std::out_of_range("container is empty");
 79 | 				return *m_end;
 80 | 			}
 81 | 
 82 | 			syze_type size() const
 83 | 			{
 84 | 				return m_size;
 85 | 			}
 86 | 
 87 | 			void push_back(T item)
 88 | 			{
 89 | 				if (full())
 90 | 					throw std::out_of_range("container is full");
 91 | 				*m_end = item;
 92 | 				increment(m_end);
 93 | 				++m_size;
 94 | 			}
 95 | 
 96 | 			template<typename ... Args>
 97 | 			void emplace_back(Args && ... args)
 98 | 			{
 99 | 				push_back(T(std::forward<Args>(args)...));
100 | 			}
101 | 
102 | 			void pop()
103 | 			{
104 | 				if (empty())
105 | 					throw std::out_of_range("container is empty");
106 | 				--m_size;
107 | 				increment(m_front);
108 | 			}
109 | 
110 | 			T pop_front()
111 | 			{
112 | 				if (empty())
113 | 					throw std::out_of_range("container is empty");
114 | 				--m_size;
115 | 				T temp = *m_front;
116 | 				increment(m_front);
117 | 				return temp;
118 | 			}
119 | 
120 | 			void push(T item)
121 | 			{
122 | 				push_back(item);
123 | 			}
124 | 
125 | 
126 | 		};
127 | 	}
128 | }
129 | 


--------------------------------------------------------------------------------
/ChannelsCPP/ChannelBuffer.h:
--------------------------------------------------------------------------------
  1 | #pragma once
  2 | 
  3 | #include <queue>
  4 | #include <memory>
  5 | 
  6 | #include <mutex>
  7 | #include <condition_variable>
  8 | #include <atomic>
  9 | 
 10 | #include "Circular_buffer.h"
 11 | namespace go
 12 | {
 13 | 	namespace internal
 14 | 	{
 15 | 		template<typename T, std::size_t Buffer_Size=0>
 16 | 		class ChannelBuffer
 17 | 		{
 18 | 		private:
 19 | 			Circular_buffer<T, Buffer_Size> buffer;
 20 | 			std::mutex bufferLock;
 21 | 			std::condition_variable inputWait;
 22 | 			std::condition_variable outputWait;
 23 | 			std::atomic_bool is_closed;
 24 | 		public:
 25 | 			ChannelBuffer():is_closed(false) { }
 26 | 			~ChannelBuffer() = default;
 27 | 
 28 | 			//Wait for the next value
 29 | 			T getNextValue()
 30 | 			{
 31 | 				std::unique_lock<std::mutex> ulock(bufferLock);
 32 | 				if (buffer.empty())
 33 | 				{
 34 | 					if (is_closed) //if closed we always return the default initialisation of T
 35 | 						return{};
 36 | 					inputWait.wait(ulock, [&]() {return !buffer.empty() || is_closed; });
 37 | 					if (buffer.empty() && is_closed) // when we close the channel and there was more waiting then available value 
 38 | 						return{};
 39 | 				}
 40 | 
 41 | 				T temp;
 42 | 				std::swap(temp, buffer.front());
 43 | 				buffer.pop();
 44 | 				outputWait.notify_one();
 45 | 				return temp;
 46 | 			}
 47 | 
 48 | 			//Should use std::optional but MSVC and Clang doesn't support it yet :( #C++17
 49 | 			std::unique_ptr<T> tryGetNextValue()
 50 | 			{
 51 | 				if (is_closed) //if closed we always return the default initialisation of T
 52 | 					return std::make_unique<T>(T{});
 53 | 				std::unique_lock<std::mutex> ulock(bufferLock);
 54 | 				if (buffer.empty())
 55 | 				{
 56 | 					return nullptr;
 57 | 				}
 58 | 				std::unique_ptr<T> temp = std::make_unique<T>(buffer.front());
 59 | 				buffer.pop();
 60 | 				outputWait.notify_one();
 61 | 				return std::move(temp);
 62 | 			}
 63 | 
 64 | 			void insertValue(T in)
 65 | 			{
 66 | 				if (!is_closed)
 67 | 				{
 68 | 					{
 69 | 						std::unique_lock<std::mutex> lock(bufferLock);
 70 | 						if (buffer.full())
 71 | 						{
 72 | 							outputWait.wait(lock, [&]() {return !buffer.full() || is_closed; });
 73 | 							if (is_closed) // if channel was closed end all awaiting inputs (cannot send to a closed channel)
 74 | 							{
 75 | 								return;
 76 | 							}
 77 | 						}
 78 | 						buffer.push(in);
 79 | 					}
 80 | 					inputWait.notify_one();
 81 | 				}
 82 | 			}
 83 | 
 84 | 			void close()
 85 | 			{
 86 | 				is_closed = true;
 87 | 				inputWait.notify_one();
 88 | 				outputWait.notify_all();
 89 | 
 90 | 			}
 91 | 
 92 | 			bool isClosed()
 93 | 			{
 94 | 				return is_closed;
 95 | 			}
 96 | 
 97 | 		};
 98 | 	}
 99 | }
100 | 


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/.gitattributes:
--------------------------------------------------------------------------------
 1 | ###############################################################################
 2 | # Set default behavior to automatically normalize line endings.
 3 | ###############################################################################
 4 | * text=auto
 5 | 
 6 | ###############################################################################
 7 | # Set default behavior for command prompt diff.
 8 | #
 9 | # This is need for earlier builds of msysgit that does not have it on by
10 | # default for csharp files.
11 | # Note: This is only used by command line
12 | ###############################################################################
13 | #*.cs     diff=csharp
14 | 
15 | ###############################################################################
16 | # Set the merge driver for project and solution files
17 | #
18 | # Merging from the command prompt will add diff markers to the files if there
19 | # are conflicts (Merging from VS is not affected by the settings below, in VS
20 | # the diff markers are never inserted). Diff markers may cause the following 
21 | # file extensions to fail to load in VS. An alternative would be to treat
22 | # these files as binary and thus will always conflict and require user
23 | # intervention with every merge. To do so, just uncomment the entries below
24 | ###############################################################################
25 | #*.sln       merge=binary
26 | #*.csproj    merge=binary
27 | #*.vbproj    merge=binary
28 | #*.vcxproj   merge=binary
29 | #*.vcproj    merge=binary
30 | #*.dbproj    merge=binary
31 | #*.fsproj    merge=binary
32 | #*.lsproj    merge=binary
33 | #*.wixproj   merge=binary
34 | #*.modelproj merge=binary
35 | #*.sqlproj   merge=binary
36 | #*.wwaproj   merge=binary
37 | 
38 | ###############################################################################
39 | # behavior for image files
40 | #
41 | # image files are treated as binary by default.
42 | ###############################################################################
43 | #*.jpg   binary
44 | #*.png   binary
45 | #*.gif   binary
46 | 
47 | ###############################################################################
48 | # diff behavior for common document formats
49 | # 
50 | # Convert binary document formats to text before diffing them. This feature
51 | # is only available from the command line. Turn it on by uncommenting the 
52 | # entries below.
53 | ###############################################################################
54 | #*.doc   diff=astextplain
55 | #*.DOC   diff=astextplain
56 | #*.docx  diff=astextplain
57 | #*.DOCX  diff=astextplain
58 | #*.dot   diff=astextplain
59 | #*.DOT   diff=astextplain
60 | #*.pdf   diff=astextplain
61 | #*.PDF   diff=astextplain
62 | #*.rtf   diff=astextplain
63 | #*.RTF   diff=astextplain
64 | 


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/ChannelsCPP/ChannelUtility.h:
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  1 | #pragma once
  2 | //#include "Channel.h"
  3 | #include <utility>
  4 | #include <functional>
  5 | #include<iostream>
  6 | #include <random>
  7 | #include <algorithm>
  8 | 
  9 | /*#include "IChannel.h"
 10 | #include "OChannel.h"*/
 11 | 
 12 | namespace go
 13 | {
 14 | 	namespace internal
 15 | 	{
 16 | 		template<typename...> constexpr bool dependent_false = false;
 17 | 	}
 18 | 	
 19 | 	template<typename T, std::size_t Buffer_Size> class Chan;
 20 | 
 21 | 	template<typename T, std::size_t Buffer_Size> class OChan;
 22 | 	template<typename T, std::size_t Buffer_Size> class IChan;
 23 | 
 24 | 
 25 | 	// Select statements references: https://golang.org/ref/spec#Select_statements
 26 | 	class Case
 27 | 	{
 28 | 		std::function<bool()> task;
 29 | 	public:
 30 | 		template<typename T, std::size_t Buffer_Size, typename func>
 31 | 		Case(IChan<T, Buffer_Size> ch, func f)
 32 | 		{
 33 | 			task = [=]() {
 34 | 				auto val = ch.m_buffer->tryGetNextValue();
 35 | 				if (val)
 36 | 				{
 37 | 					f(*val);
 38 | 				};
 39 | 				return val == nullptr;
 40 | 			};
 41 | 		}
 42 | 
 43 | 		template<typename T, std::size_t Buffer_Size, typename func>
 44 | 		Case(OChan<T, Buffer_Size> ch, func f)
 45 | 		{
 46 | 			task = [=]() {
 47 | 				f();
 48 | 				return true;
 49 | 			};
 50 | 		}
 51 | 
 52 | 		template<typename T, std::size_t Buffer_Size, typename func>
 53 | 		Case(Chan<T, Buffer_Size> ch, func f) : Case(IChan<T, Buffer_Size>(ch), std::forward<func>(f)) {}
 54 | 
 55 | 		Case(const Case&) = default;
 56 | 		Case() { task = []() {return true; }; }
 57 | 
 58 | 		bool operator() ()
 59 | 		{
 60 | 			return task();
 61 | 		}
 62 | 	};
 63 | 
 64 | 	class Default
 65 | 	{
 66 | 		std::function<void()> task;
 67 | 	public:
 68 | 		template<typename func>
 69 | 		Default(func f)
 70 | 		{
 71 | 			task = f;
 72 | 		}
 73 | 
 74 | 		void operator() ()
 75 | 		{
 76 | 			task();
 77 | 		}
 78 | 	};
 79 | 
 80 | 	class Select
 81 | 	{
 82 | 		std::vector<Case> cases;
 83 | 
 84 | 		bool randomExec()
 85 | 		{
 86 | 			std::random_device rd;
 87 | 			std::mt19937 g(rd());
 88 | 			std::shuffle(begin(cases), end(cases), g);
 89 | 			for (auto& c : cases)
 90 | 			{
 91 | 				if (!c())
 92 | 					return true;
 93 | 			}
 94 | 			return false;
 95 | 		}
 96 | 
 97 | 		template<typename ...T>
 98 | 		void exec(Case && c, T &&... params)
 99 | 		{
100 | 			cases.emplace_back(c);
101 | 			exec(std::forward<T>(params)...);
102 | 		}
103 | 
104 | 		void exec(Case && c)
105 | 		{
106 | 			cases.emplace_back(c);
107 | 			randomExec();
108 | 		}
109 | 
110 | 		void exec(Default && d)
111 | 		{
112 | 			if(!randomExec())
113 | 				d();
114 | 		}
115 | 		template<typename ...T>
116 | 		void exec(Default && c, T &&... params)
117 | 		{
118 | 			static_assert(internal::dependent_false<T...>, "There should only be at most 1 Default case and it must be the last parameter of the Select");
119 | 		}
120 | 
121 | 	public:
122 | 		template<typename ...T>
123 | 		Select(T &&... params)//:cases(sizeof...(params))
124 | 		{
125 | 			cases.reserve(sizeof...(params));
126 | 			exec(std::forward<T>(params)...);
127 | 		}
128 | 	};
129 | 
130 | 	// Close references: https://golang.org/ref/spec#Close
131 | 	// we try to avoid exceptions so we will have custom implementation
132 | 	template<typename T, std::size_t Buffer_Size>
133 | 	void Close(OChan<T, Buffer_Size> ch)
134 | 	{
135 | 		ch.close();
136 | 	}
137 | 
138 | 	template<typename T, std::size_t Buffer_Size = 1>
139 | 	Chan<T, Buffer_Size> && make_Chan()
140 | 	{
141 | 		return Chan<T, Buffer_Size>();
142 | 	}
143 | 
144 | 
145 | }
146 | 
147 | 


--------------------------------------------------------------------------------
/ChannelsCPP/IChannel.h:
--------------------------------------------------------------------------------
  1 | #pragma once
  2 | #include <iterator>
  3 | #include <memory>
  4 | #include "ChannelBuffer.h"
  5 | namespace go
  6 | {
  7 | 	class Case;
  8 | 
  9 | 	
 10 | 		template<typename T, std::size_t Buffer_Size> class OChan;
 11 | 
 12 | 		// Inspired by http://h-deb.clg.qc.ca/Sujets/Divers--cplusplus/Iterateurs-generateurs.html From Patrice Roy
 13 | 		// References: https://golang.org/ref/spec#For_statements
 14 | 		// To be improved...
 15 | 		template<typename T, std::size_t Buffer_Size = 0>
 16 | 		class IChan_Iterator :public std::iterator<std::input_iterator_tag, T> //:public std::shared_ptr<T>
 17 | 		{
 18 | 			std::shared_ptr<internal::ChannelBuffer<T, Buffer_Size>> m_buffer;
 19 | 			T val;
 20 | 
 21 | 		public:
 22 | 			IChan_Iterator(std::shared_ptr<internal::ChannelBuffer<T, Buffer_Size>> buffer, bool isEnd = false) :m_buffer(buffer)
 23 | 			{
 24 | 				if (!isEnd)
 25 | 					operator++();
 26 | 			}
 27 | 			IChan_Iterator(const IChan_Iterator&) = default;
 28 | 			T& operator*()
 29 | 			{
 30 | 				return val;
 31 | 			}
 32 | 			IChan_Iterator& operator++()
 33 | 			{
 34 | 				//static_cast<std::shared_ptr<T>>(*this) = std::make_shared<T>(m_buffer->getNextValue());
 35 | 				val = m_buffer->getNextValue();
 36 | 				return *this;
 37 | 			}
 38 | 			IChan_Iterator operator++(int)
 39 | 			{
 40 | 				IChan_Iterator tmp(*this); // copy
 41 | 				operator++(); // pre-increment
 42 | 				return tmp;   // return old value
 43 | 			}
 44 | 			inline bool operator==(const IChan_Iterator& rhs) const { return m_buffer->isClosed(); }
 45 | 			inline bool operator!=(const IChan_Iterator& rhs) const { return !operator==(rhs); }
 46 | 
 47 | 		};
 48 | 		template<typename T, std::size_t Buffer_Size = 0>
 49 | 		class IChan //: private Chan<T>
 50 | 		{
 51 | 		protected:
 52 | 			std::shared_ptr<internal::ChannelBuffer<T, Buffer_Size>> m_buffer;
 53 | 			IChan(std::shared_ptr<internal::ChannelBuffer<T, Buffer_Size>> buffer) : m_buffer(buffer) {}
 54 | 		public:
 55 | 			IChan() = default;
 56 | 			IChan(const IChan<T, Buffer_Size>& ch) = default;//:m_buffer(ch.m_buffer) {}
 57 | 			IChan(IChan<T, Buffer_Size>&& ch) {swap(m_buffer,ch.m_buffer);};
 58 | 
 59 | 			//Extract from channel
 60 | 			friend 	IChan<T, Buffer_Size>& operator >> (IChan<T, Buffer_Size>& ch, T& obj)
 61 | 			{
 62 | 				obj = ch.m_buffer->getNextValue();
 63 | 				return ch;
 64 | 
 65 | 			}
 66 | 			friend 	IChan<T, Buffer_Size>& operator<<(T& obj, IChan<T, Buffer_Size>& ch)
 67 | 			{
 68 | 				obj = ch.m_buffer->getNextValue();
 69 | 				return ch;
 70 | 			}
 71 | 
 72 | 			template<std::size_t OBuffer_Size>
 73 | 			friend 	IChan<T, Buffer_Size>& operator >> (IChan<T, Buffer_Size>& ch, OChan<T, OBuffer_Size>& obj)
 74 | 			{
 75 | 				T temp;
 76 | 				ch >> temp;
 77 | 				obj << temp;
 78 | 				return ch;
 79 | 
 80 | 			}
 81 | 			template<std::size_t OBuffer_Size>
 82 | 			friend 	IChan<T, Buffer_Size>& operator<<(OChan<T, OBuffer_Size>& obj, IChan<T, Buffer_Size>& ch)
 83 | 			{
 84 | 				T temp;
 85 | 				ch >> temp;
 86 | 				obj << temp;
 87 | 				return ch;
 88 | 			}
 89 | 			//Stream
 90 | 			friend std::istream& operator >> (std::istream& is, IChan<T, Buffer_Size>& ch)
 91 | 			{
 92 | 				T temp;
 93 | 				is >> temp;
 94 | 				ch << temp;
 95 | 				return is;
 96 | 			}
 97 | 
 98 | 
 99 | 			using  IChan_EndIterator = IChan_Iterator<T, Buffer_Size>;
100 | 
101 | 			IChan_Iterator<T, Buffer_Size> begin()
102 | 			{
103 | 				return IChan_Iterator<T, Buffer_Size>{ m_buffer };
104 | 			}
105 | 			IChan_EndIterator end()
106 | 			{
107 | 				return{ m_buffer , true };
108 | 			}
109 | 
110 | 			friend class go::Case;
111 | 
112 | 		};
113 | 	
114 | }
115 | 
116 | 


--------------------------------------------------------------------------------
/ChannelsCPP/Source.cpp:
--------------------------------------------------------------------------------
  1 | #include <iostream>
  2 | #include "Channel.h"
  3 | #include <thread>
  4 | #include <chrono>
  5 | #include <string>
  6 | #include <vector>
  7 | 
  8 | #include "Circular_buffer.h"
  9 | 
 10 | using namespace std;
 11 | using namespace go;
 12 | using namespace go::internal;
 13 | 
 14 | template<size_t BufferSize>
 15 | void fibonacci(Chan<int, BufferSize>& c, Chan<int>& quit)
 16 | {
 17 | 	int x=0, y = 1;
 18 | 	for (bool go = true; go;)
 19 | 	{
 20 | 		Select
 21 | 		{
 22 | 			Case{c << x,[&]()
 23 | 			{
 24 | 				int t = x;
 25 | 				x = y;
 26 | 				y += t;
 27 | 			}},
 28 | 			Case{quit,[&](auto v) 
 29 | 			{
 30 | 				cout << "quit" << endl;
 31 | 				go = false;
 32 | 			}}
 33 | 		};
 34 | 	}
 35 | }
 36 | template<typename T1, typename T2>
 37 | void f(T1& ch, T2 x, int time)
 38 | {
 39 | 	this_thread::sleep_for(chrono::seconds(time));
 40 | 	ch << x;
 41 | }
 42 | int main()
 43 | {
 44 | 	/*Circular_buffer<int,2> buff;
 45 | 	// Try on empty
 46 | 	try
 47 | 	{
 48 | 		cout << buff.pop_front() << endl;
 49 | 	}
 50 | 	catch (const std::exception& e)
 51 | 	{
 52 | 		cout << e.what() << endl;
 53 | 	}
 54 | 	//testz
 55 | 	try
 56 | 	{
 57 | 		buff.emplace_back(5);
 58 | 	}
 59 | 	catch (const std::exception& e)
 60 | 	{
 61 | 		cout << e.what() << endl;
 62 | 	}
 63 | 	// Test Pop
 64 | 	try
 65 | 	{
 66 | 		cout << buff.pop_front() << endl;
 67 | 	}
 68 | 	catch (const std::exception& e)
 69 | 	{
 70 | 		cout << e.what() << endl;
 71 | 	}
 72 | 	//insert
 73 | 	try
 74 | 	{
 75 | 		buff.emplace_back(5);
 76 | 	}
 77 | 	catch (const std::exception& e)
 78 | 	{
 79 | 		cout << e.what() << endl;
 80 | 	}
 81 | 	//full
 82 | 	try
 83 | 	{
 84 | 		buff.emplace_back(5);
 85 | 	}
 86 | 	catch (const std::exception& e)
 87 | 	{
 88 | 		cout << e.what() << endl;
 89 | 	}
 90 | 	//exception full
 91 | 	try
 92 | 	{
 93 | 		buff.emplace_back(5);
 94 | 	}
 95 | 	catch (const std::exception& e)
 96 | 	{
 97 | 		cout << e.what() << endl;
 98 | 	}*/
 99 | 
100 | 
101 | 	{
102 | 		Chan<int> c;
103 | 		thread([=]() mutable
104 | 		{
105 | 			for (size_t i = 0; i < 10; i++)
106 | 			{
107 | 				cout << c << endl;
108 | 			}
109 | 		}).detach();
110 | 
111 | 		for (size_t i = 0; i < 10; i++)
112 | 		{
113 | 			c << i;
114 | 		}
115 | 		this_thread::sleep_for(chrono::milliseconds(1)); // wait for last entry to be printed
116 | 	}
117 | 
118 | 	cout << "------Demo fibonacci (https://tour.golang.org/concurrency/5)-----" << endl;
119 | 
120 | 	Chan<int> c;
121 | 	Chan<int> quit;
122 | 
123 | 	thread([&]()
124 | 	{
125 | 		for (size_t i = 0; i < 10; i++)
126 | 		{
127 | 			cout << c << endl;
128 | 		}
129 | 		quit << 0;
130 | 	}).detach();
131 | 	fibonacci(c, quit);
132 | 
133 | 	cout << "------Demo with Default-----" << endl;
134 | 
135 | 	Chan<int> ch;
136 | 	Chan<string> ch2;
137 | 
138 | 	auto t1 = thread(f<decltype(ch),int>, ref(ch), 1, 3);
139 | 	auto t2 = thread(f<decltype(ch2),string>, ref(ch2), "J'aime",1 );
140 | 
141 | 	for (bool asd = true; asd;)
142 | 	{
143 | 		Select
144 | 		{
145 | 			Case{ch,[&](int x)
146 | 			{
147 | 				cout << "mon prof !!!" << endl << flush;
148 | 				cout << "Valeur recu: " << x << endl << flush;
149 | 				asd = false;
150 | 			}},
151 | 			Case{ch2,[](string x)
152 | 			{
153 | 				cout << x << endl << flush;
154 | 			}},
155 | 			Default{[]()
156 | 			{
157 | 				cout << "Waiting...." << endl<<flush;
158 | 				this_thread::sleep_for(chrono::milliseconds(500));
159 | 			}}
160 | 		};
161 | 	}
162 | 
163 | 	t1.join();
164 | 	t2.join();
165 | 
166 | 
167 | 	cout << "------Demo range for on channel-----" << endl;
168 | 
169 | 	Chan<int> ch3;
170 | 
171 | 	thread t3 = thread([&]() 
172 | 	{
173 | 		for (int i = 0; i < 10; i++)
174 | 		{
175 | 			ch3 << i;
176 | 			this_thread::sleep_for(chrono::milliseconds(500));
177 | 		}
178 | 		Close(ch3);
179 | 	});
180 | 
181 | 	for (auto &asd : ch3)
182 | 	{
183 | 		cout << asd << endl;
184 | 	}
185 | 	cout << "Fini" << endl;
186 | 	t3.join();
187 | 	
188 | 	cout << "------Test buffered Channel-----" << endl;
189 | 	Chan<int, 5> multi;
190 | 	thread([&]() {
191 | 		multi << 1 << 2 << 3 << 4 << 5;
192 | 		this_thread::sleep_for(chrono::milliseconds(500));
193 | 		Close(multi);
194 | 	}).detach();
195 | 	for(auto& asd:multi)
196 | 	{
197 | 		cout << asd << endl;
198 | 	}
199 | 
200 | 	//must be fix
201 | 	// This test doesn't make sens it's dead locking itself because output channel can only buffer 1 value and we end up trying to put 9 values in it
202 | 	/*cout << "------Test closing Channel-----" << endl;
203 | 	Chan<int> tested;
204 | 	Chan<int,9> output;
205 | 	vector<thread> vt;
206 | 	for (size_t i = 0; i < 10; i++)
207 | 	{
208 | 		vt.emplace_back([&]() 
209 | 		{
210 | 			output << tested;
211 | 		});
212 | 	}
213 | 	this_thread::sleep_for(chrono::seconds(1));
214 | 	tested << 3 << 2 << 1 << 0 << -1 << -2; //doesn't work... find why (atomic not initialized)
215 | 	-5 >> (-4 >> (-3 >> tested));
216 | 	//Close(tested);
217 | 	int i = 0;
218 | 	for (auto &asd : output)
219 | 	{
220 | 		++i;
221 | 		cout << output << endl;
222 | 	}
223 | 	cout << "i: " << i << endl;
224 | 	for (auto &t : vt)
225 | 	{
226 | 		t.join();
227 | 	}*/
228 | }


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
  1 | ## Ignore Visual Studio temporary files, build results, and
  2 | ## files generated by popular Visual Studio add-ons.
  3 | 
  4 | # User-specific files
  5 | *.suo
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 10 | # User-specific files (MonoDevelop/Xamarin Studio)
 11 | *.userprefs
 12 | 
 13 | # Build results
 14 | [Dd]ebug/
 15 | [Dd]ebugPublic/
 16 | [Rr]elease/
 17 | [Rr]eleases/
 18 | [Xx]64/
 19 | [Xx]86/
 20 | [Bb]uild/
 21 | bld/
 22 | [Bb]in/
 23 | [Oo]bj/
 24 | 
 25 | # Visual Studio 2015 cache/options directory
 26 | .vs/
 27 | # Uncomment if you have tasks that create the project's static files in wwwroot
 28 | #wwwroot/
 29 | 
 30 | # MSTest test Results
 31 | [Tt]est[Rr]esult*/
 32 | [Bb]uild[Ll]og.*
 33 | 
 34 | # NUNIT
 35 | *.VisualState.xml
 36 | TestResult.xml
 37 | 
 38 | # Build Results of an ATL Project
 39 | [Dd]ebugPS/
 40 | [Rr]eleasePS/
 41 | dlldata.c
 42 | 
 43 | # DNX
 44 | project.lock.json
 45 | artifacts/
 46 | 
 47 | *_i.c
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 91 | # TFS 2012 Local Workspace
 92 | $tf/
 93 | 
 94 | # Guidance Automation Toolkit
 95 | *.gpState
 96 | 
 97 | # ReSharper is a .NET coding add-in
 98 | _ReSharper*/
 99 | *.[Rr]e[Ss]harper
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101 | 
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103 | .JustCode
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112 | _NCrunch_*
113 | .*crunch*.local.xml
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136 | # Click-Once directory
137 | publish/
138 | 
139 | # Publish Web Output
140 | *.[Pp]ublish.xml
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142 | 
143 | # TODO: Un-comment the next line if you do not want to checkin 
144 | # your web deploy settings because they may include unencrypted
145 | # passwords
146 | #*.pubxml
147 | *.publishproj
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149 | # NuGet Packages
150 | *.nupkg
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152 | **/packages/*
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154 | !**/packages/build/
155 | # Uncomment if necessary however generally it will be regenerated when needed
156 | #!**/packages/repositories.config
157 | # NuGet v3's project.json files produces more ignoreable files
158 | *.nuget.props
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162 | csx/
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239 | ModelManifest.xml
240 | 
241 | # Paket dependency manager
242 | .paket/paket.exe
243 | 
244 | # FAKE - F# Make
245 | .fake/


--------------------------------------------------------------------------------
/ChannelsCPP/Channel.h:
--------------------------------------------------------------------------------
  1 | #pragma once
  2 | #include <queue>
  3 | #include <deque>
  4 | #include <memory>
  5 | #include <mutex>
  6 | #include <condition_variable>
  7 | #include <atomic>
  8 | #include <limits>
  9 | 
 10 | #include "ChannelBuffer.h"
 11 | #include "IChannel.h"
 12 | #include "OChannel.h"
 13 | #include "ChannelUtility.h"
 14 | #include "Circular_buffer.h"
 15 | 
 16 | namespace go
 17 | {
 18 | 	//Channel Type references: https://golang.org/ref/spec#Channel_types
 19 | 	template<typename T, std::size_t Buffer_Size = 1>
 20 | 	class Chan :public IChan<T, Buffer_Size>, public OChan<T, Buffer_Size>
 21 | 	{
 22 | 	public:
 23 | 		Chan()
 24 | 		{
 25 | 			Chan::IChan::m_buffer = Chan::OChan::m_buffer = std::make_shared<internal::ChannelBuffer<T, Buffer_Size>>();
 26 | 			//IChan<T, Buffer_Size>::m_buffer = OChan<T, Buffer_Size>::m_buffer = std::make_shared<internal::ChannelBuffer<T, Buffer_Size>>();
 27 | 		}
 28 | 		~Chan() = default;
 29 | 
 30 | 		//Insert in channel
 31 | 		friend 	OChan<T, Buffer_Size>& operator<<(Chan<T, Buffer_Size>& ch, const T& obj)
 32 | 		{
 33 | 			return static_cast<OChan<T, Buffer_Size>&>(ch) << obj;
 34 | 			/*ch.m_buffer->insertValue(obj);
 35 | 			return ch;*/
 36 | 		}
 37 | 		friend 	OChan<T, Buffer_Size>& operator >> (const T& obj, Chan<T, Buffer_Size>& ch)
 38 | 		{
 39 | 			return static_cast<OChan<T, Buffer_Size>&>(ch) << obj;
 40 | 
 41 | 			/*ch.m_buffer->insertValue(obj);
 42 | 			return  ch;*/
 43 | 
 44 | 		}
 45 | 		//Stream
 46 | 		friend std::ostream& operator<<(std::ostream& os, Chan<T, Buffer_Size>& ch)
 47 | 		{
 48 | 			return os << static_cast<OChan<T, Buffer_Size>&>(ch);
 49 | 		}
 50 | 		friend std::istream& operator >> (std::istream& is, Chan<T, Buffer_Size>& ch)
 51 | 		{
 52 | 			return is >> static_cast<IChan<T, Buffer_Size>&>(ch);
 53 | 		}
 54 | 
 55 | 
 56 | 
 57 | 	};
 58 | 
 59 | 	/*template<typename T>
 60 | 	class Chan<T,0> :public IChan<T>, public OChan<T>
 61 | 	{
 62 | 	public:
 63 | 		Chan()
 64 | 		{
 65 | 			IChan<T>::m_buffer = OChan<T>::m_buffer = std::make_shared<internal::ChannelBuffer<T>>();
 66 | 		}
 67 | 		~Chan() = default;
 68 | 
 69 | 		//Insert in channel
 70 | 		friend 	OChan<T> operator<<(Chan<T>& ch, const T& obj)
 71 | 		{
 72 | 			return static_cast<OChan<T>>(ch) << obj;
 73 | 		}
 74 | 		friend 	OChan<T> operator >> (const T& obj, Chan<T>& ch)
 75 | 		{
 76 | 			return static_cast<OChan<T>>(ch) << obj;
 77 | 
 78 | 		}
 79 | 		//Stream
 80 | 		friend std::ostream& operator<<(std::ostream& os, Chan<T>& ch)
 81 | 		{
 82 | 			return os << static_cast<OChan<T>>(ch);
 83 | 		}
 84 | 		friend std::istream& operator >> (std::istream& is, Chan<T>& ch)
 85 | 		{
 86 | 			return is >> static_cast<IChan<T>>(ch);
 87 | 		}
 88 | 
 89 | 
 90 | 
 91 | 	};*/
 92 | 
 93 | }
 94 | 
 95 | //template<typename T>
 96 | //using inf_chan = Chan<T, std::numeric_limits<std::size_t>::infinity(), std::queue<T>>;
 97 | 
 98 | 	//Specialized (Buffered)
 99 | 	/*template<typename T, std::size_t bufferSize>
100 | 	class Channel
101 | 	{
102 | 	private:
103 | 		class ChannelBuffer
104 | 		{
105 | 		private:
106 | 			std::deque<T> buffer;
107 | 			std::mutex bufferLock;
108 | 			std::condition_variable inputWait;
109 | 		public:
110 | 			ChannelBuffer() = default;
111 | 			~ChannelBuffer() = default;
112 | 			T getNextValue()
113 | 			{
114 | 				std::unique_lock<std::mutex> ulock(bufferLock);
115 | 				if (buffer.empty())
116 | 				{
117 | 					inputWait.wait(ulock, [&]() {return !buffer.empty(); });
118 | 				}
119 | 				T temp;
120 | 				std::swap(temp, buffer.front());
121 | 				buffer.pop_front();
122 | 				return temp;
123 | 			}
124 | 			void insertValue(T in)
125 | 			{
126 | 				{
127 | 					std::lock_guard<std::mutex> lock(bufferLock);
128 | 					if (buffer.size() >= bufferSize)
129 | 						throw exception("Buffer full");
130 | 					buffer.push_back(in);
131 | 				}
132 | 				inputWait.notify_one();
133 | 			}
134 | 
135 | 		};
136 | 		std::shared_ptr<ChannelBuffer> m_channel;
137 | 		T getNextValue()
138 | 		{
139 | 			return m_channel->getNextValue();
140 | 		}
141 | 
142 | 		void insertValue(T val)
143 | 		{
144 | 			m_channel->insertValue(val);
145 | 		}
146 | 
147 | 	public:
148 | 		Channel()
149 | 		{
150 | 			m_channel = std::make_shared<ChannelBuffer>();
151 | 		}
152 | 		~Channel() = default;
153 | 
154 | 		//Extract from channel
155 | 		friend 	T& operator >> (Channel<T, bufferSize>& ch, T& obj)
156 | 		{
157 | 			obj = ch.getNextValue();
158 | 			return obj;
159 | 
160 | 		}
161 | 		friend 	T& operator<<(T& obj, Channel<T, bufferSize>& ch)
162 | 		{
163 | 			obj = ch.getNextValue();
164 | 			return obj;
165 | 		}
166 | 
167 | 		//Insert in channel
168 | 		friend 	Channel<T, bufferSize>& operator<<(Channel<T, bufferSize>& ch, const T& obj)
169 | 		{
170 | 			ch.insertValue(obj);
171 | 			return ch;
172 | 		}
173 | 		friend 	Channel<T, bufferSize>& operator >> (const T& obj, Channel<T, bufferSize>& ch)
174 | 		{
175 | 			ch.insertValue(obj);
176 | 			return ch;
177 | 
178 | 		}
179 | 
180 | 		//Stream
181 | 		friend std::ostream& operator<<(std::ostream& os, Channel<T, bufferSize>& ch)
182 | 		{
183 | 			os << ch.getNextValue();
184 | 			return os;
185 | 		}
186 | 		friend std::istream& operator >> (std::istream& is, Channel<T, bufferSize>& ch)
187 | 		{
188 | 			T temp;
189 | 			is >> temp;
190 | 			ch << temp;
191 | 			return is;
192 | 		}
193 | 
194 | 
195 | 	};*/
196 | 
197 | 


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/README.md:
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  1 | # ChannelsCPP
  2 | C++ implementation of the Go (GoLang) Channel and Select structure in a modern C++ manner. 
  3 |   
  4 | You will need a C++ compiler that has at least support for C++11 and part of C++14 (it might work on C++11 only but i didn't test).  
  5 | I have already identified parts of the code that could use C++17 features, but some feature are not yet implemented in my compiler.  
  6 |   
  7 | I also want to stabilize the code a bit more, do performance testing/ C++ version testing and organise the repo (when i do C++17 integration make a branch for each C++ version that i can support down to C++11 ... if it has all the features ... still not tested)  
  8 |   
  9 | In the future i will try to bring each implementation closer to the Go implementation by respecting the API design and behavior.
 10 | ## Features list
 11 | - [x] [Basic Go Channel type](#basic-channel) (will be modify when the [Buffered Channel](#buffered-channel) is implemented)
 12 | - [x] [Buffered Go Channel type](#buffered-channel)
 13 | - [x] Channel stream input/output operator overload for inserting and extracting
 14 | - [x] [Select statement](#select)
 15 | - [x] [Select statement](#select) with channel insertion
 16 | - [x] [Select statement](#select) random case selection when multiple available
 17 | - [ ] Custom For class, for cleaner use with select (no bool value)
 18 | - [x] Range for loop on channel
 19 | - [x] Close function (ties in with the Range for loop feature)
 20 | - [ ] make_Chan function to replace the [make](https://golang.org/ref/spec#Making_slices_maps_and_channels) function in Go
 21 | 
 22 | ## Features
 23 | ### Channels
 24 | Channel are simple and intuitive to use and interact like the [Go channel type](https://tour.golang.org/concurrency/2)  
 25 | Ther are two types of channel in go, the [basic channel type](https://tour.golang.org/concurrency/2) and the [buffered channel type](https://tour.golang.org/concurrency/3)  
 26 | > Channels are a typed conduit through which you can send and receive values.  
 27 | >-Go  
 28 |   
 29 | * Multi directional inserting operators overload (The data flows in the direction of the insertion/extraction operator.)
 30 | * Multi directional extration operators overload (The data flows in the direction of the insertion/extraction operator.)
 31 | * Basic stream operator overload
 32 | * Channel to Channel inserting and extration
 33 | * Chaining insertion and extraction
 34 | * Iterators to work with C++ Range for loop (emulate the Go feature)
 35 |   
 36 | #### Unbuffered Channel
 37 | Unbuffered Channel only have 1 slot for data, so it's not exactly Unbuffered and as such does not behave like the Unbuffered Channel in Go that block until there's a sender and a receiver ready at the same time.  (It will change in the future)
 38 | 
 39 | ```C++
 40 | Chan<int> ch;
 41 | // inserting 
 42 | int i = 2;
 43 | ch << 1;
 44 | i >> ch;
 45 | // extracting
 46 | i << ch;
 47 | ch >> y
 48 | ```
 49 | #### Buffered Channel
 50 | Buffered Channel are a type of channel that doesn't block unless the buffer is full.
 51 | 
 52 | ```C++
 53 | Chan<int, 5> multi;
 54 | 
 55 | thread([&]() {
 56 | 	multi << 1 << 2 << 3 << 4 << 5;
 57 | 	this_thread::sleep_for(chrono::milliseconds(500)); // Give some time to process the data
 58 | 	Close(multi);
 59 | }).detach();
 60 | 
 61 | for(auto& asd:multi)
 62 | {
 63 | 	cout << asd << endl;
 64 | }
 65 | ```
 66 | 
 67 | ### Select
 68 | The C++ implementation of the Go Select statement  
 69 | 
 70 | * can have one or infinite [Case](#case) block (infinite = until you connot compile it)
 71 | * can have zero or one [Default](#default) block (enforced in code)
 72 | * support input in channel in [Case](#case) block channel evaluation (feature seems to be working but might need a bit more attention)
 73 | * random channel ([Case](#case)) selection is now supported
 74 |   
 75 | Go exemple (from [here](https://tour.golang.org/concurrency/5)) :  
 76 | ```Go
 77 | func fibonacci(c, quit chan int) {
 78 | 	x, y := 0, 1
 79 | 	for {
 80 | 		select {
 81 | 		case c <- x:
 82 | 			x, y = y, x+y
 83 | 		case <-quit:
 84 | 			fmt.Println("quit")
 85 | 			return
 86 | 		}
 87 | 	}
 88 | }
 89 | 
 90 | func main() {
 91 | 	c := make(chan int)
 92 | 	quit := make(chan int)
 93 | 	go func() {
 94 | 		for i := 0; i < 10; i++ {
 95 | 			fmt.Println(<-c)
 96 | 		}
 97 | 		quit <- 0
 98 | 	}()
 99 | 	fibonacci(c, quit)
100 | }
101 | 
102 | ```
103 | 
104 | C++ exemple implementation :
105 | ```C++ 
106 | void fibonacci(Chan<int>& c, Chan<int>& quit)
107 | {
108 | 	int x=0, y = 1;
109 | 	for (bool go = true; go;)
110 | 	{
111 | 		Select
112 | 		{
113 | 			Case{c << x,[&]()
114 | 			{
115 | 				int t = x;
116 | 				x = y;
117 | 				y += t;
118 | 			}},
119 | 			Case{quit,[&](auto v) 
120 | 			{
121 | 				cout << "quit" << endl;
122 | 				go = false;
123 | 			}}
124 | 		};
125 | 	}
126 | }
127 | 
128 | int main()
129 | {
130 | 	Chan<int> c;
131 | 	Chan<int> quit;
132 | 
133 | 	thread([&]()
134 | 	{
135 | 		for (size_t i = 0; i < 10; i++)
136 | 		{
137 | 			cout << c << endl;
138 | 		}
139 | 		quit << 0;
140 | 	}).detach();
141 | 	fibonacci(c, quit);
142 | }
143 | ```
144 | 
145 | #### Case
146 | Contains code to be executed when the channel that it's checking receive something.  
147 | It support sending to the channel it's checking but the feature might need to be rework because it doesn't behave like the Go implementation.
148 | 
149 | #### Default
150 | Execute it's code when no [Case](#case) block  had a channel that received data.  
151 | There can only be at most **1** Default block in a [Select](#select) statement and it must be the last block (this is enforced in the code).
152 | 
153 | ### Close
154 | Function called on a [Channel](#channels) to close the stream.  
155 | Most of the time it's use to notify a [Channel](#channels) that is being iterated over in a Range for loop. It is in fact the only way to exit a Range for loop.
156 | 
157 | ### make_Chan
158 | Is included, but doesn't work! **DO NOT USE**
159 | 


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