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+ make use of GDALOpenShared instead of GDALOpen, which could be better performing when using multiple equal datasource reads (no need to open multiple datasources, and yes it is still thread safe)

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This commit is contained in:
Lucio Asnaghi 2009-05-08 21:15:05 +00:00
parent 474dd54900
commit 9de066e035
1 changed files with 3 additions and 2 deletions
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5
plugins/input/gdal/gdal_datasource.cpp
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@ -37,7 +37,7 @@ using mapnik::featureset_ptr;
using mapnik::layer_descriptor;
using mapnik::datasource_exception;
gdal_datasource::gdal_datasource( parameters const& params)
gdal_datasource::gdal_datasource(parameters const& params)
: datasource(params),
extent_(),
desc_(*params.get<std::string>("type"),"utf-8")
@ -52,8 +52,9 @@ gdal_datasource::gdal_datasource( parameters const& params)
else
dataset_name_ = *file;
dataset_ = boost::shared_ptr<GDALDataset>(reinterpret_cast<GDALDataset*>(GDALOpen((dataset_name_).c_str(),GA_ReadOnly)));
dataset_ = boost::shared_ptr<GDALDataset>(reinterpret_cast<GDALDataset*>(GDALOpenShared((dataset_name_).c_str(),GA_ReadOnly)));
if (!dataset_) throw datasource_exception(CPLGetLastErrorMsg());
double tr[6];
dataset_->GetGeoTransform(tr);
double x0 = tr[0];