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ntdll: Fix possible race-condition in iocp poller code.

This commit is contained in:
Sebastian Lackner 2014-03-10 18:51:21 +01:00 committed by Alexandre Julliard
parent 3a72922e7f
commit 9277fcfdb4
1 changed files with 4 additions and 2 deletions
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6
dlls/ntdll/threadpool.c
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@ -235,12 +235,14 @@ NTSTATUS WINAPI RtlQueueWorkItem(PRTL_WORK_ITEM_ROUTINE Function, PVOID Context,
*/
static DWORD CALLBACK iocp_poller(LPVOID Arg)
{
HANDLE cport = Arg;
while( TRUE )
{
PRTL_OVERLAPPED_COMPLETION_ROUTINE callback;
LPVOID overlapped;
IO_STATUS_BLOCK iosb;
NTSTATUS res = NtRemoveIoCompletion( compl_port, (PULONG_PTR)&callback, (PULONG_PTR)&overlapped, &iosb, NULL );
NTSTATUS res = NtRemoveIoCompletion( cport, (PULONG_PTR)&callback, (PULONG_PTR)&overlapped, &iosb, NULL );
if (res)
{
ERR("NtRemoveIoCompletion failed: 0x%x\n", res);
@ -297,7 +299,7 @@ NTSTATUS WINAPI RtlSetIoCompletionCallback(HANDLE FileHandle, PRTL_OVERLAPPED_CO
if (!res)
{
/* FIXME native can start additional threads in case of e.g. hung callback function. */
res = RtlQueueWorkItem( iocp_poller, NULL, WT_EXECUTEDEFAULT );
res = RtlQueueWorkItem( iocp_poller, cport, WT_EXECUTEDEFAULT );
if (!res)
compl_port = cport;
else