#include "PipeLine.h"
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PipeMaterial::PipeMaterial() :
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type(PMT__FIRST), buffer(nullptr), buffSize(0),
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former(nullptr), deleter(nullptr), args(nullptr)
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{
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}
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void PipeMaterial::exec_deleter()
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{
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if (deleter != nullptr)
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{
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deleter(this);
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deleter = nullptr;
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}
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}
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PipeLine::PipeLine() : global_params_map(), elem_create_func_map(), elems()
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{
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}
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PipeLine::~PipeLine()
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{
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// pipe stop
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for(elem_vec_t::iterator iter = elems.begin(); iter != elems.end(); ++iter)
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{
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PipeLineElem* elem = *iter;
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if (elem != nullptr)
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{
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elem->finit();
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delete *iter;
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}
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}
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elems.clear();
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}
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bool PipeLine::register_elem_creator(const std::string& type, elem_create_func_t func)
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{
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if (type.empty() || func == nullptr)
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return false;
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elem_create_func_map_t::iterator iter = elem_create_func_map.find(type);
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if (iter != elem_create_func_map.end())
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return false;
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elem_create_func_map.insert(std::make_pair(type, func));
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return true;
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}
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void PipeLine::push_elem(PipeLineElem* elem)
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{
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if(elem != nullptr)
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{
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elem->manager = this;
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elems.push_back(elem);
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}
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}
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PipeLineElem* PipeLine::push_elem(const std::string& type)
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{
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elem_create_func_map_t::iterator iter = elem_create_func_map.find(type);
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if (iter == elem_create_func_map.end())
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return nullptr;
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elem_create_func_t func = iter->second;
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if (func == nullptr)
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return nullptr;
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PipeLineElem* elem = func();
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if (elem == nullptr)
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return nullptr;
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elem->manager = this;
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push_elem(elem);
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return elem;
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}
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PipeLineElem* PipeLine::pipe(PipeMaterial* pm /*= nullptr*/)
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{
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PipeLineElem* elem_begin = *elems.begin();
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PipeLineElem* elem_last = *elems.rbegin();
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if (elems.empty() || elem_begin == nullptr || elem_last == nullptr)
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return nullptr;
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uint8_t pmPlacement[sizeof(PipeMaterial)];
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if (pm == nullptr)
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pm = new (pmPlacement) PipeMaterial;
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if (elems.size() == 1)
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{
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elem_begin->gain(*pm);
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pm->exec_deleter();
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return elem_begin;
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}
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else if (elems.size() == 2)
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{
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if (elem_begin->gain(*pm))
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{
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elem_last->pay(*pm);
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pm->exec_deleter();
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}
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else
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return elem_begin;
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return elem_last;
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}
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else
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{
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if (!elem_begin->gain(*pm))
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return elem_begin;
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bool lastRet = true;
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elem_vec_t::iterator iter = elems.begin();
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++iter;
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elem_begin = *iter;
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while (elem_begin != elem_last)
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{
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if (lastRet && (lastRet = elem_begin->pay(*pm)) )
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{
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pm->exec_deleter();
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lastRet = elem_begin->gain(*pm);
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}
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else
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return elem_begin;//#todo this may memory leakage in pm
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++iter;
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elem_begin = *iter;
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}
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if (lastRet)
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{
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elem_last->pay(*pm);
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pm->exec_deleter();
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}
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return elem_last;
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}
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return nullptr;
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}
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void PipeLine::set_global_param(const std::string& name, const std::string& value)
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{
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if (name.empty())
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return;
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global_params_map_t::iterator iter = global_params_map.find(name);
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if (iter == global_params_map.end())
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global_params_map.insert(std::make_pair(name, value));
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else
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iter->second = value;
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}
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std::string PipeLine::get_global_param(const std::string& name) const
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{
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global_params_map_t::const_iterator iter = global_params_map.find(name);
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if (iter == global_params_map.end())
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return "";
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else
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return iter->second;
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}
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