Re: [PATCH v3 2/8] mingw: work around irregular failures of unlink on windows

> If a file is opened by another process (e.g. indexing of an IDE) for
> reading it is not allowed to be deleted. So in case unlink fails retry
> after waiting for some time. This extends the workaround from 6ac6f878.
>
> Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net>
> ---
>  compat/mingw.c |   31 +++++++++++++++++++++++++++++--
>  1 files changed, 29 insertions(+), 2 deletions(-)
>
> diff --git a/compat/mingw.c b/compat/mingw.c
> index a7e1c6b..52183a7 100644
> --- a/compat/mingw.c
> +++ b/compat/mingw.c
> @@ -3,6 +3,8 @@
>  #include <conio.h>
>  #include "../strbuf.h"
>
> +static const int delay[] = { 0, 1, 10, 20, 40 };
> +
>  int err_win_to_posix(DWORD winerr)
>  {
>        int error = ENOSYS;
> @@ -116,12 +118,38 @@ int err_win_to_posix(DWORD winerr)
>        return error;
>  }
>
> +static inline int is_file_in_use_error(DWORD errcode)
> +{
> +       switch(GetLastError()) {