addLz4ToPlist.h File Reference

#include "LZ4Plugin/H5Zlz4.h"

Include dependency graph for addLz4ToPlist.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Namespaces
namespace	H5
	HDF5 Traits.

Functions
void	addLz4ToPlist (H5::DSetCreatPropList &)

Function Documentation

addLz4ToPlist()

void addLz4ToPlist

(

H5::DSetCreatPropList &

plist

)

Definition at line 18 of file addLz4ToPlist.cxx.

                                               {
 
  // Register the filter if it isn't already known to the library.
  // Since LZ4PluginLib is linked into the binary, H5Z_LZ4 is already
  // in memory -- no HDF5_PLUGIN_PATH or symlink directory needed.
  // The registry is global, so registration happens once per process.
  static std::once_flag registered;
  std::call_once(registered, []() {
    if (!H5Zfilter_avail(H5Z_FILTER_LZ4)) {
      herr_t reg = H5Zregister(H5Z_LZ4);
      if (reg < 0) throw std::runtime_error("can't register LZ4 filter");
    }
  });
 
  // this specifies additional arguments. For LZ4 this can have one
  // entry, the chunk size. Leaving it empty should use the default
  // chunk size.
  std::array<unsigned int, 0> cd_values;
 
  herr_t status = H5Pset_filter(
    plist.getId(),
    H5Z_FILTER_LZ4,
    H5Z_FLAG_MANDATORY,
    cd_values.size(),
    cd_values.data());
 
  if (status < 0) throw std::runtime_error("can't set LZ4 filter");
 
}