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#include "read_manager.hpp"
#include "visual_params.hpp"
#include "../platform/platform.hpp"
#include "../base/buffer_vector.hpp"
#include "../base/stl_add.hpp"
#include "../std/bind.hpp"
#include "../std/algorithm.hpp"
namespace df
{
namespace
{
struct LessCoverageCell
{
bool operator()(shared_ptr<TileInfo> const & l, TileKey const & r) const
{
return l->GetTileKey() < r;
}
bool operator()(TileKey const & l, shared_ptr<TileInfo> const & r) const
{
return l < r->GetTileKey();
}
};
} // namespace
ReadManager::ReadManager(EngineContext & context, MapDataProvider & model)
: m_context(context)
, m_model(model)
, myPool(64, ReadMWMTaskFactory(m_memIndex, m_model, m_context))
{
m_pool.Reset(new threads::ThreadPool(ReadCount(), bind(&ReadManager::OnTaskFinished, this, _1)));
}
void ReadManager::OnTaskFinished(threads::IRoutine * task)
{
ASSERT(dynamic_cast<ReadMWMTask *>(task) != NULL, ());
ReadMWMTask * t = static_cast<ReadMWMTask *>(task);
t->Reset();
myPool.Return(t);
}
void ReadManager::UpdateCoverage(ScreenBase const & screen, set<TileKey> const & tiles)
{
if (screen == m_currentViewport)
return;
if (MustDropAllTiles(screen))
{
for_each(m_tileInfos.begin(), m_tileInfos.end(), bind(&ReadManager::CancelTileInfo, this, _1));
m_tileInfos.clear();
for_each(tiles.begin(), tiles.end(), bind(&ReadManager::PushTaskBackForTileKey, this, _1));
}
else
{
// Find rects that go out from viewport
buffer_vector<tileinfo_ptr, 8> outdatedTiles;
#ifdef _MSC_VER
vs_bug::
#endif
set_difference(m_tileInfos.begin(), m_tileInfos.end(),
tiles.begin(), tiles.end(),
back_inserter(outdatedTiles), LessCoverageCell());
// Find rects that go in into viewport
buffer_vector<TileKey, 8> inputRects;
#ifdef _MSC_VER
vs_bug::
#endif
set_difference(tiles.begin(), tiles.end(),
m_tileInfos.begin(), m_tileInfos.end(),
back_inserter(inputRects), LessCoverageCell());
for_each(outdatedTiles.begin(), outdatedTiles.end(), bind(&ReadManager::ClearTileInfo, this, _1));
for_each(m_tileInfos.begin(), m_tileInfos.end(), bind(&ReadManager::PushTaskFront, this, _1));
for_each(inputRects.begin(), inputRects.end(), bind(&ReadManager::PushTaskBackForTileKey, this, _1));
}
m_currentViewport = screen;
}
void ReadManager::Invalidate(set<TileKey> const & keyStorage)
{
tile_set_t::iterator it = m_tileInfos.begin();
for (; it != m_tileInfos.end(); ++it)
{
if (keyStorage.find((*it)->GetTileKey()) != keyStorage.end())
{
CancelTileInfo(*it);
PushTaskFront(*it);
}
}
}
void ReadManager::Stop()
{
for_each(m_tileInfos.begin(), m_tileInfos.end(), bind(&ReadManager::CancelTileInfo, this, _1));
m_tileInfos.clear();
m_pool->Stop();
m_pool.Destroy();
}
size_t ReadManager::ReadCount()
{
return max(GetPlatform().CpuCores() - 2, 1);
}
bool ReadManager::MustDropAllTiles(ScreenBase const & screen) const
{
int const oldScale = df::GetTileScaleBase(m_currentViewport);
int const newScale = df::GetTileScaleBase(screen);
return (oldScale != newScale) || !m_currentViewport.GlobalRect().IsIntersect(screen.GlobalRect());
}
void ReadManager::PushTaskBackForTileKey(TileKey const & tileKey)
{
tileinfo_ptr tileInfo(new TileInfo(tileKey));
m_tileInfos.insert(tileInfo);
ReadMWMTask * task = myPool.Get();
task->Init(tileInfo);
m_pool->PushBack(task);
}
void ReadManager::PushTaskFront(tileinfo_ptr const & tileToReread)
{
ReadMWMTask * task = myPool.Get();
task->Init(tileToReread);
m_pool->PushFront(task);
}
void ReadManager::CancelTileInfo(tileinfo_ptr const & tileToCancel)
{
tileToCancel->Cancel(m_memIndex);
}
void ReadManager::ClearTileInfo(tileinfo_ptr const & tileToClear)
{
CancelTileInfo(tileToClear);
m_tileInfos.erase(tileToClear);
}
} // namespace df
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