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Merge pull request #2374 from ajax16384/fast_win_preallocate 

fix windows file preallocation issue
This commit is contained in:
Steven Siloti 2017-09-27 20:32:59 -07:00 committed by GitHub
parent 7b644614c1 6e396a85c2
commit 9f8cfc41b7
1 changed files with 1 additions and 30 deletions
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31
src/file.cpp
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@ -1153,35 +1153,7 @@ namespace {
ec.assign(GetLastError(), system_category()); ec.assign(GetLastError(), system_category());
return false; return false;
} }
} if (!(m_open_mode & open_mode::sparse))
#if _WIN32_WINNT >= 0x0600 // only if Windows Vista or newer
if (!(m_open_mode & open_mode::sparse))
{
typedef DWORD (WINAPI *GetFileInformationByHandleEx_t)(HANDLE hFile
, FILE_INFO_BY_HANDLE_CLASS FileInformationClass
, LPVOID lpFileInformation
, DWORD dwBufferSize);
auto GetFileInformationByHandleEx =
aux::get_library_procedure<aux::kernel32, GetFileInformationByHandleEx_t>("GetFileInformationByHandleEx");
offs.QuadPart = 0;
if (GetFileInformationByHandleEx != nullptr)
{
// only allocate the space if the file
// is not fully allocated
FILE_STANDARD_INFO inf;
if (GetFileInformationByHandleEx(native_handle()
, FileStandardInfo, &inf, sizeof(inf)) == FALSE)
{
ec.assign(GetLastError(), system_category());
if (ec) return false;
}
offs = inf.AllocationSize;
}
if (offs.QuadPart < s)
{ {
// if the user has permissions, avoid filling // if the user has permissions, avoid filling
// the file with zeroes, but just fill it with // the file with zeroes, but just fill it with
@ -1189,7 +1161,6 @@ namespace {
set_file_valid_data(m_file_handle, s); set_file_valid_data(m_file_handle, s);
} }
} }
#endif // if Windows Vista
#else // NON-WINDOWS #else // NON-WINDOWS
struct stat st; struct stat st;
if (::fstat(native_handle(), &st) != 0) if (::fstat(native_handle(), &st) != 0)