void CPathEstimator::InitEstimator(const std::string& cacheFileName, const std::string& map)
{
int numThreads_tmp = configHandler->Get("HardwareThreadCount", 0);
size_t numThreads = ((numThreads_tmp < 0) ? 0 : numThreads_tmp);
if (numThreads == 0) {
#if (BOOST_VERSION >= 103500)
numThreads = boost::thread::hardware_concurrency();
#elif defined(USE_GML)
numThreads = gmlCPUCount();
#else
numThreads = 1;
#endif
}
if (threads.size() != numThreads) {
threads.resize(numThreads);
pathFinders.resize(numThreads);
}
pathFinders[0] = pathFinder;
// Not much point in multithreading these...
InitVertices();
InitBlocks();
PrintLoadMsg("Reading estimate path costs");
if (!ReadFile(cacheFileName, map)) {
char calcMsg[512];
sprintf(calcMsg, "Analyzing map accessibility [%d]", BLOCK_SIZE);
PrintLoadMsg(calcMsg);
pathBarrier=new boost::barrier(numThreads);
// Start threads if applicable
for(size_t i=1; i<numThreads; ++i) {
pathFinders[i] = new CPathFinder();
threads[i] = new boost::thread(boost::bind(&CPathEstimator::CalcOffsetsAndPathCosts, this, i));
}
// Use the current thread as thread zero
CalcOffsetsAndPathCosts(0);
for(size_t i=1; i<numThreads; ++i) {
threads[i]->join();
delete threads[i];
delete pathFinders[i];
}
delete pathBarrier;
PrintLoadMsg("Writing path data file...");
WriteFile(cacheFileName, map);
}
}
// wrapper
void CPathEstimator::InitVerticesAndBlocks(int minVertex, int maxVertex, int minBlock, int maxBlock) {
InitVertices(minVertex, maxVertex);
InitBlocks(minBlock, maxBlock);
}
