MemFile.cxx

// cosmos
#include <cosmos/error/ApiError.hxx>
#include <cosmos/formatting.hxx>
#include <cosmos/io/MemFile.hxx>
#include <cosmos/private/cosmos.hxx>
#include <cosmos/utils.hxx>
 
namespace cosmos {
 
void MemFile::create(const SysString name, const OpenFlags flags, const HugePageSize tlb_ps) {
 
        close();
 
        // see `man mmap` for an explanation about this.
        const auto page_size = to_integral(tlb_ps) << MAP_HUGE_SHIFT;
        auto fd = ::memfd_create(name.raw(), flags.raw() | page_size);
 
        if (fd == -1) {
                cosmos_throw (ApiError("memfd_create()"));
        }
 
        m_fd.setFD(FileNum{fd});
}
 
} // end ns