/*\r
-* copyright (c) 2010 Sveriges Television AB <info@casparcg.com>\r
+* Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>\r
*\r
-* This file is part of CasparCG.\r
+* This file is part of CasparCG (www.casparcg.com).\r
*\r
-* CasparCG is free software: you can redistribute it and/or modify\r
-* it under the terms of the GNU General Public License as published by\r
-* the Free Software Foundation, either version 3 of the License, or\r
-* (at your option) any later version.\r
+* CasparCG is free software: you can redistribute it and/or modify\r
+* it under the terms of the GNU General Public License as published by\r
+* the Free Software Foundation, either version 3 of the License, or\r
+* (at your option) any later version.\r
*\r
-* CasparCG is distributed in the hope that it will be useful,\r
-* but WITHOUT ANY WARRANTY; without even the implied warranty of\r
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
-* GNU General Public License for more details.\r
-\r
-* You should have received a copy of the GNU General Public License\r
-* along with CasparCG. If not, see <http://www.gnu.org/licenses/>.\r
+* CasparCG is distributed in the hope that it will be useful,\r
+* but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+* GNU General Public License for more details.\r
+*\r
+* You should have received a copy of the GNU General Public License\r
+* along with CasparCG. If not, see <http://www.gnu.org/licenses/>.\r
*\r
+* Author: Robert Nagy, ronag89@gmail.com\r
*/\r
+\r
#pragma once\r
\r
-#include "../exception/win32_exception.h"\r
-#include "../utility/assert.h"\r
-#include "../log/log.h"\r
+#include "../except.h"\r
+#include "../enum_class.h"\r
+#include "../log.h"\r
\r
#include <tbb/atomic.h>\r
#include <tbb/concurrent_queue.h>\r
\r
#include <boost/thread.hpp>\r
-#include <boost/noncopyable.hpp>\r
\r
#include <functional>\r
\r
namespace caspar {\r
\r
namespace detail {\r
-\r
-typedef struct tagTHREADNAME_INFO\r
+ \r
+template<typename T>\r
+struct move_on_copy\r
{\r
- DWORD dwType; // must be 0x1000\r
- LPCSTR szName; // pointer to name (in user addr space)\r
- DWORD dwThreadID; // thread ID (-1=caller thread)\r
- DWORD dwFlags; // reserved for future use, must be zero\r
-} THREADNAME_INFO;\r
+ move_on_copy(const move_on_copy<T>& other) : value(std::move(other.value)){}\r
+ move_on_copy(T&& value) : value(std::move(value)){}\r
+ mutable T value;\r
+};\r
\r
-inline void SetThreadName(DWORD dwThreadID, LPCSTR szThreadName)\r
+template<typename T>\r
+move_on_copy<T> make_move_on_copy(T&& value)\r
{\r
- THREADNAME_INFO info;\r
- {\r
- info.dwType = 0x1000;\r
- info.szName = szThreadName;\r
- info.dwThreadID = dwThreadID;\r
- info.dwFlags = 0;\r
- }\r
- __try\r
- {\r
- RaiseException( 0x406D1388, 0, sizeof(info)/sizeof(DWORD), (DWORD*)&info );\r
- }\r
- __except (EXCEPTION_CONTINUE_EXECUTION){} \r
+ return move_on_copy<T>(std::move(value));\r
}\r
\r
}\r
-\r
-enum priority\r
+ \r
+struct task_priority_def\r
{\r
- high_priority,\r
- normal_priority,\r
- priority_count\r
+ enum type\r
+ {\r
+ high_priority,\r
+ normal_priority,\r
+ priority_count\r
+ };\r
};\r
+typedef enum_class<task_priority_def> task_priority;\r
\r
-class executor : boost::noncopyable\r
+class executor\r
{\r
- const std::string name_;\r
- boost::thread thread_;\r
- tbb::atomic<bool> is_running_;\r
+ executor(const executor&);\r
+ executor& operator=(const executor&);\r
\r
- typedef tbb::concurrent_bounded_queue<std::function<void()>> function_queue;\r
- function_queue execution_queue_[priority_count];\r
+ tbb::atomic<bool> is_running_;\r
+ boost::thread thread_;\r
\r
-public:\r
+ typedef tbb::concurrent_bounded_queue<std::function<void()>> function_queue;\r
+ function_queue execution_queue_[task_priority::priority_count];\r
\r
- explicit executor(const std::wstring& name) : name_(narrow(name)) // noexcept\r
+ template<typename Func>\r
+ auto create_task(Func&& func) -> boost::packaged_task<decltype(func())> // noexcept\r
+ { \r
+ typedef boost::packaged_task<decltype(func())> task_type;\r
+ \r
+ auto task = task_type(std::forward<Func>(func));\r
+ \r
+ task.set_wait_callback(std::function<void(task_type&)>([=](task_type& my_task) // The std::function wrapper is required in order to add ::result_type to functor class.\r
+ {\r
+ try\r
+ {\r
+ if(boost::this_thread::get_id() == thread_.get_id()) // Avoids potential deadlock.\r
+ my_task();\r
+ }\r
+ catch(boost::task_already_started&){}\r
+ }));\r
+ \r
+ return std::move(task);\r
+ }\r
+\r
+public: \r
+ executor(const std::wstring& name) // noexcept\r
{\r
- thread_ = boost::thread([this]{run();});\r
+ name; // TODO: Use to set thread name.\r
is_running_ = true;\r
+ thread_ = boost::thread([this]{run();});\r
}\r
\r
virtual ~executor() // noexcept\r
{\r
stop();\r
- \r
- std::function<void()> func;\r
- while(execution_queue_[normal_priority].try_pop(func)){} // Wake all waiting push threads.\r
-\r
- if(boost::this_thread::get_id() != thread_.get_id())\r
- thread_.join();\r
+ join();\r
}\r
\r
void set_capacity(size_t capacity) // noexcept\r
{\r
- execution_queue_[normal_priority].set_capacity(capacity);\r
+ execution_queue_[task_priority::normal_priority].set_capacity(capacity);\r
+ }\r
+ \r
+ void clear()\r
+ { \r
+ std::function<void()> func;\r
+ while(execution_queue_[task_priority::normal_priority].try_pop(func));\r
+ while(execution_queue_[task_priority::high_priority].try_pop(func));\r
}\r
\r
void stop() // noexcept\r
{\r
is_running_ = false; \r
- execution_queue_[normal_priority].try_push([]{}); // Wake the execution thread.\r
+ execution_queue_[task_priority::normal_priority].try_push([]{}); // Wake the execution thread.\r
}\r
\r
void wait() // noexcept\r
{\r
invoke([]{});\r
}\r
+\r
+ void join()\r
+ {\r
+ if(boost::this_thread::get_id() == thread_.get_id())\r
+ BOOST_THROW_EXCEPTION(invalid_operation());\r
+\r
+ thread_.join();\r
+ }\r
\r
template<typename Func>\r
- auto begin_invoke(Func&& func, priority priority = normal_priority) -> boost::unique_future<decltype(func())> // noexcept\r
+ auto begin_invoke(Func&& func, task_priority priority = task_priority::normal_priority) -> boost::unique_future<decltype(func())> // noexcept\r
{ \r
- typedef boost::packaged_task<decltype(func())> task_type;\r
- \r
- auto task = task_type(std::forward<Func>(func));\r
- auto future = task.get_future();\r
- \r
if(!is_running_)\r
- return std::move(future); \r
+ BOOST_THROW_EXCEPTION(invalid_operation() << msg_info("executor not running."));\r
\r
- task.set_wait_callback(std::function<void(task_type&)>([=](task_type& my_task) // The std::function wrapper is required in order to add ::result_type to functor class.\r
+ // Create a move on copy adaptor to avoid copying the functor into the queue, tbb::concurrent_queue does not support move semantics.\r
+ auto task_adaptor = detail::make_move_on_copy(create_task(func));\r
+\r
+ auto future = task_adaptor.value.get_future();\r
+\r
+ execution_queue_[priority.value()].push([=]\r
{\r
try\r
{\r
- if(boost::this_thread::get_id() == thread_.get_id()) // Avoids potential deadlock.\r
- my_task();\r
+ task_adaptor.value();\r
+ }\r
+ catch(boost::task_already_started&)\r
+ {\r
+ }\r
+ catch(...)\r
+ {\r
+ CASPAR_LOG_CURRENT_EXCEPTION();\r
}\r
- catch(boost::task_already_started&){}\r
- }));\r
- \r
- // Create a move on copy adaptor to avoid copying the functor into the queue, tbb::concurrent_queue does not support move semantics.\r
- struct task_adaptor_t\r
- {\r
- task_adaptor_t(const task_adaptor_t& other) : task(std::move(other.task)){}\r
- task_adaptor_t(task_type&& task) : task(std::move(task)){}\r
- void operator()() const { task(); }\r
- mutable task_type task;\r
- } task_adaptor(std::move(task));\r
-\r
- execution_queue_[priority].push([=]\r
- {\r
- try{task_adaptor();}\r
- catch(boost::task_already_started&){}\r
- catch(...){CASPAR_LOG_CURRENT_EXCEPTION();}\r
});\r
\r
- if(priority != normal_priority)\r
- execution_queue_[normal_priority].push(nullptr);\r
+ if(priority != task_priority::normal_priority)\r
+ execution_queue_[task_priority::normal_priority].push(nullptr);\r
\r
return std::move(future); \r
}\r
\r
template<typename Func>\r
- auto invoke(Func&& func, priority prioriy = normal_priority) -> decltype(func()) // noexcept\r
+ auto invoke(Func&& func, task_priority prioriy = task_priority::normal_priority) -> decltype(func()) // noexcept\r
{\r
if(boost::this_thread::get_id() == thread_.get_id()) // Avoids potential deadlock.\r
return func();\r
\r
void yield() // noexcept\r
{\r
- if(boost::this_thread::get_id() != thread_.get_id()) // Only yield when calling from execution thread.\r
- return;\r
+ if(boost::this_thread::get_id() != thread_.get_id())\r
+ BOOST_THROW_EXCEPTION(invalid_operation() << msg_info("Executor can only yield inside of thread context."));\r
\r
std::function<void()> func;\r
- while(execution_queue_[high_priority].try_pop(func))\r
+ execution_queue_[task_priority::normal_priority].pop(func); \r
+ \r
+ std::function<void()> func2;\r
+ while(execution_queue_[task_priority::high_priority].try_pop(func2))\r
{\r
- if(func)\r
- func();\r
+ if(func2)\r
+ func2();\r
} \r
- }\r
- \r
- function_queue::size_type capacity() const /*noexcept*/ { return execution_queue_[normal_priority].capacity(); }\r
- function_queue::size_type size() const /*noexcept*/ { return execution_queue_[normal_priority].size(); }\r
- bool empty() const /*noexcept*/ { return execution_queue_[normal_priority].empty(); }\r
- bool is_running() const /*noexcept*/ { return is_running_; } \r
- \r
-private:\r
- \r
- void execute() // noexcept\r
- {\r
- std::function<void()> func;\r
- execution_queue_[normal_priority].pop(func); \r
-\r
- yield();\r
\r
if(func)\r
func();\r
}\r
+ \r
+ function_queue::size_type size() const /*noexcept*/\r
+ {\r
+ return execution_queue_[task_priority::normal_priority].size() + execution_queue_[task_priority::high_priority].size(); \r
+ }\r
+ \r
+ bool is_running() const /*noexcept*/ { return is_running_; } \r
+ \r
+private: \r
\r
void run() // noexcept\r
{\r
win32_exception::install_handler(); \r
- detail::SetThreadName(GetCurrentThreadId(), name_.c_str());\r
while(is_running_)\r
- execute();\r
- is_running_ = false;\r
+ {\r
+ try\r
+ {\r
+ yield();\r
+ }\r
+ catch(...)\r
+ {\r
+ CASPAR_LOG_CURRENT_EXCEPTION();\r
+ }\r
+ }\r
} \r
};\r
\r
projects / casparcg / blobdiff