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#5663: Emulate GetOverlappedResultEx on Windows Vista/7

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This commit is contained in:
Mike Gelfand 2016-01-02 15:23:38 +00:00
parent ea48360212
commit 119d10f01e
1 changed files with 38 additions and 2 deletions
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40
libtransmission/watchdir-win32.c
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@ -61,6 +61,42 @@ tr_watchdir_win32;
**** ****
***/ ***/
static BOOL
tr_get_overlapped_result_ex (HANDLE handle,
LPOVERLAPPED overlapped,
LPDWORD bytes_transferred,
DWORD timeout,
BOOL alertable)
{
typedef BOOL (WINAPI * impl_t) (HANDLE, LPOVERLAPPED, LPDWORD, DWORD, BOOL);
static impl_t real_impl = NULL;
static bool is_real_impl_valid = false;
if (!is_real_impl_valid)
{
real_impl = (impl_t) GetProcAddress (GetModuleHandleW (L"kernel32.dll"),
"GetOverlappedResultEx");
is_real_impl_valid = true;
}
if (real_impl != NULL)
return real_impl (handle, overlapped, bytes_transferred, timeout, alertable);
const DWORD wait_result = WaitForSingleObjectEx (handle, timeout, alertable);
if (wait_result == WAIT_FAILED)
return FALSE;
if (wait_result == WAIT_IO_COMPLETION || wait_result == WAIT_TIMEOUT)
{
SetLastError (wait_result);
return FALSE;
}
assert (wait_result == WAIT_OBJECT_0);
return GetOverlappedResult (handle, overlapped, bytes_transferred, FALSE);
}
static unsigned int __stdcall static unsigned int __stdcall
tr_watchdir_win32_thread (void * context) tr_watchdir_win32_thread (void * context)
{ {
@ -68,8 +104,8 @@ tr_watchdir_win32_thread (void * context)
tr_watchdir_win32 * const backend = BACKEND_UPCAST (tr_watchdir_get_backend (handle)); tr_watchdir_win32 * const backend = BACKEND_UPCAST (tr_watchdir_get_backend (handle));
DWORD bytes_transferred; DWORD bytes_transferred;
while (GetOverlappedResultEx (backend->fd, &backend->overlapped, &bytes_transferred, while (tr_get_overlapped_result_ex (backend->fd, &backend->overlapped, &bytes_transferred,
INFINITE, FALSE)) INFINITE, FALSE))
{ {
PFILE_NOTIFY_INFORMATION info = (PFILE_NOTIFY_INFORMATION) backend->buffer; PFILE_NOTIFY_INFORMATION info = (PFILE_NOTIFY_INFORMATION) backend->buffer;