diff options
Diffstat (limited to 'compat/poll/poll.c')
| -rw-r--r-- | compat/poll/poll.c | 31 |
1 files changed, 3 insertions, 28 deletions
diff --git a/compat/poll/poll.c b/compat/poll/poll.c index 0e95dd4..afa6d24 100644 --- a/compat/poll/poll.c +++ b/compat/poll/poll.c @@ -139,22 +139,10 @@ win32_compute_revents (HANDLE h, int *p_sought) INPUT_RECORD *irbuffer; DWORD avail, nbuffer; BOOL bRet; - IO_STATUS_BLOCK iosb; - FILE_PIPE_LOCAL_INFORMATION fpli; - static PNtQueryInformationFile NtQueryInformationFile; - static BOOL once_only; switch (GetFileType (h)) { case FILE_TYPE_PIPE: - if (!once_only) - { - NtQueryInformationFile = (PNtQueryInformationFile)(void (*)(void)) - GetProcAddress (GetModuleHandleW (L"ntdll.dll"), - "NtQueryInformationFile"); - once_only = TRUE; - } - happened = 0; if (PeekNamedPipe (h, NULL, 0, NULL, &avail, NULL) != 0) { @@ -166,22 +154,9 @@ win32_compute_revents (HANDLE h, int *p_sought) else { - /* It was the write-end of the pipe. Check if it is writable. - If NtQueryInformationFile fails, optimistically assume the pipe is - writable. This could happen on Win9x, where NtQueryInformationFile - is not available, or if we inherit a pipe that doesn't permit - FILE_READ_ATTRIBUTES access on the write end (I think this should - not happen since WinXP SP2; WINE seems fine too). Otherwise, - ensure that enough space is available for atomic writes. */ - memset (&iosb, 0, sizeof (iosb)); - memset (&fpli, 0, sizeof (fpli)); - - if (!NtQueryInformationFile - || NtQueryInformationFile (h, &iosb, &fpli, sizeof (fpli), - FilePipeLocalInformation) - || fpli.WriteQuotaAvailable >= PIPE_BUF - || (fpli.OutboundQuota < PIPE_BUF && - fpli.WriteQuotaAvailable == fpli.OutboundQuota)) + /* It was the write-end of the pipe. Unfortunately there is no + reliable way of knowing if it can be written without blocking. + Just say that it's all good. */ happened |= *p_sought & (POLLOUT | POLLWRNORM | POLLWRBAND); } return happened; |