compat/win32/flush.c

   1 #include "git-compat-util.h"
   2 #include <winternl.h>
   3 #include "lazyload.h"
   4
   5 int win32_fsync_no_flush(int fd)
   6 {
   7        IO_STATUS_BLOCK io_status;
   8
   9 #define FLUSH_FLAGS_FILE_DATA_ONLY 1
  10
  11        DECLARE_PROC_ADDR(ntdll.dll, NTSTATUS, NTAPI, NtFlushBuffersFileEx,
  12                          HANDLE FileHandle, ULONG Flags, PVOID Parameters, ULONG ParameterSize,
  13                          PIO_STATUS_BLOCK IoStatusBlock);
  14
  15        if (!INIT_PROC_ADDR(NtFlushBuffersFileEx)) {
  16                 errno = ENOSYS;
  17                 return -1;
  18        }
  19
  20        memset(&io_status, 0, sizeof(io_status));
  21        if (NtFlushBuffersFileEx((HANDLE)_get_osfhandle(fd), FLUSH_FLAGS_FILE_DATA_ONLY,
  22                                 NULL, 0, &io_status)) {
  23                 errno = EINVAL;
  24                 return -1;
  25        }
  26
  27        return 0;
  28 }