(C) Zeriph Enterprises, LLC
omni/sync/basic_thread.hpp
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/*
* Copyright (c), Zeriph Enterprises
* All rights reserved.
*
* Contributor(s):
* Zechariah Perez, omni (at) zeriph (dot) com
*
* THIS SOFTWARE IS PROVIDED BY ZERIPH 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 ZERIPH AND CONTRIBUTORS 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.
*/
 #if !defined(OMNI_BASIC_THREAD_HPP)
#define OMNI_BASIC_THREAD_HPP 1
#include <omni/defs/class_macros.hpp>
#include <omni/types/thread_t.hpp>
#include <omni/sync/spin.hpp>
#include <omni/sync/basic_lock.hpp>
#include <map>

namespace omni {
    namespace sync {
        class basic_thread
        {
            public:
                // Where a constructor specifies a delegate method, unless user specified, the default start type is NOW
                basic_thread();
                basic_thread(const omni::sync::basic_thread& cp);
                explicit basic_thread(const omni::sync::thread_flags& ops);
                explicit basic_thread(std::size_t max_stack_sz);
                explicit basic_thread(const omni::sync::thread_start& mthd);
                explicit basic_thread(const omni::sync::parameterized_thread_start& mthd);
                basic_thread(const omni::sync::thread_t& tid,
                             const omni::sync::thread_handle_t& h);
                basic_thread(const omni::sync::thread_start& mthd,
                             omni::sync::thread_start_type::enum_t st);
                basic_thread(const omni::sync::thread_start& mthd,
                             std::size_t max_stack_sz);
                basic_thread(const omni::sync::thread_start& mthd,
                             std::size_t max_stack_sz,
                             omni::sync::thread_start_type::enum_t st);
                basic_thread(const omni::sync::thread_start& mthd,
                             omni::sync::thread_option::enum_t op,
                             omni::sync::thread_union_t val);
                basic_thread(const omni::sync::parameterized_thread_start& mthd,
                             omni::sync::thread_arg_t args);
                basic_thread(const omni::sync::parameterized_thread_start& mthd,
                             omni::sync::thread_start_type::enum_t st);
                basic_thread(const omni::sync::parameterized_thread_start& mthd,
                             std::size_t max_stack_sz);
                basic_thread(const omni::sync::parameterized_thread_start& mthd,
                             std::size_t max_stack_sz,
                             omni::sync::thread_arg_t args);
                basic_thread(const omni::sync::parameterized_thread_start& mthd,
                             std::size_t max_stack_sz,
                             omni::sync::thread_start_type::enum_t st);
                basic_thread(const omni::sync::parameterized_thread_start& mthd,
                             omni::sync::thread_option::enum_t op,
                             omni::sync::thread_union_t val);
                basic_thread(const omni::sync::parameterized_thread_start& mthd,
                             omni::sync::thread_arg_t args,
                             omni::sync::thread_option::enum_t op,
                             omni::sync::thread_union_t val);
                ~basic_thread();
                
                void bind(const omni::sync::parameterized_thread_start& mthd);
                void bind(const omni::sync::thread_start& mthd);
                void detach();
                void detach(bool allow_rejoin);
                const omni::sync::thread_union_t get_option(omni::sync::thread_option::enum_t op) const;
                omni::sync::thread_flags options() const;
                const omni::sync::thread_handle_t handle() const;
                const omni::sync::thread_t id() const;
                bool is_alive() const;
                bool is_bound() const;
                bool is_parameter_bound() const;
                bool is_detached() const;
                bool is_threadpool_thread() const;
                bool join(); // default of infinite timeout
                bool join(unsigned long timeout);
                //TODO: add bool join(const omni::timespan& t); when omni::timespan complete
                bool kill(); // Terminate 'immediately'
                omni::sync::thread_state status() const;
                omni::sync::thread_t start();
                omni::sync::thread_t start(omni::sync::thread_arg_t args);
                void set_option(omni::sync::thread_option::enum_t op, omni::sync::thread_union_t val);
                void set_options(unsigned char op, bool val);
                void set_options(const omni::sync::thread_flags& ops);
                void swap(omni::sync::basic_thread& other);
                void unbind();
                omni::sync::basic_thread& operator=(const omni::sync::basic_thread& other);
                bool operator==(const omni::sync::basic_thread& other) const;
                bool operator!=(const omni::sync::basic_thread& other) const;
                
                #if defined(OMNI_NON_PORTABLE)
                    omni::sync::thread_priority priority() const;
                    void set_priority(omni::sync::thread_priority::enum_t p);
                #endif
                
                OMNI_MEMBERS_FW(omni::sync::basic_thread) // disposing,name,type(),hash()
                
                inline static const omni::sync::basic_thread current()
                {
                    return omni::sync::basic_thread(omni::sync::thread_id(), omni::sync::thread_handle());
                }
                
                inline static omni::sync::basic_thread create_threadpool_thread(const omni::sync::thread_start& tpoolfn)
                {
                    return omni::sync::basic_thread(tpoolfn, true);
                }
                
            private:
                // Methods
                basic_thread(const omni::sync::thread_start& mthd, bool tpool);
                void _chkmthd();
                void _close_handle(bool allow_rejoin);
                void _hreset(bool force, bool allow_rejoin);
                bool _hvalid() const;
                bool _state_running() const;
                void _state_machine(const omni::sync::thread_t tid);
                void _set_context(const omni::sync::basic_thread& t2);
                #if defined(OMNI_NON_PORTABLE)
                    void _set_prio();
                #endif
                
                // Members
                #if defined(OMNI_SAFE_BASIC_THREAD)
                    mutable omni::sync::basic_lock m_mtx;
                #endif
                omni::sync::thread_arg_t m_args;
                void* m_mthd;
                omni::sync::thread_t m_tid;
                omni::sync::thread_handle_t m_thread;
                omni::sync::thread_flags m_ops;
                omni::sync::thread_state m_state;
                #if defined(OMNI_NON_PORTABLE)
                    omni::sync::thread_priority m_priority;
                #endif
                volatile bool m_isjoined;
                volatile bool m_ispmthd;
                volatile bool m_istpool;
                
                static OMNI_THREAD_FNPTR_T OMNI_THREAD_CALL_T _start(void* param);
                
                class manager
                {
                    public:
                        manager() : m_lock(), m_threads() {}
                        ~manager() {}
                        void push_back(omni::sync::thread_t tid, omni::sync::basic_thread& bthread);                        
                        void pop_back(omni::sync::thread_t tid);
                        void remove(omni::sync::thread_t tid);
                        
                        static manager& instance()
                        {
                            static omni::sync::basic_thread::manager* ret = new omni::sync::basic_thread::manager();
                            return *ret;
                        }
                        
                    private:
                        typedef std::map<omni::sync::thread_t, omni::sync::basic_thread*> thread_map;
                    
                        omni::sync::basic_lock m_lock;
                        thread_map m_threads;
                        
                        manager(const manager& cp); // = delete;
                        manager& operator=(const manager& cp); // = delete;
                };
        };
    }
} // namespace omni

namespace std {
    inline void swap(omni::sync::basic_thread& ot1, omni::sync::basic_thread& ot2)
    {
        ot1.swap(ot2);
    }
}

#include <omni/sync/basic_thread_allocate.hpp>

#endif // OMNI_BASIC_THREAD_HPP