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port: fix unlikely bug in _ep_port_wait() time-out behavior

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Bert Belder 2018-05-01 22:44:32 +02:00
parent 9d61ddfddb
commit de68d70f9c
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GPG Key ID: 7A77887B2E2ED461
1 changed files with 11 additions and 7 deletions
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18
src/port.c
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@ -225,7 +225,7 @@ int ep_port_wait(ep_port_t* port_info,
/* Dequeue completion packets until either at least one interesting event
* has been discovered, or the timeout is reached.
*/
do {
for (;;) {
ULONGLONG now;
result =
@ -234,16 +234,20 @@ int ep_port_wait(ep_port_t* port_info,
break; /* Result, error, or time-out. */
if (timeout < 0)
continue; /* _ep_port_wait() never times out. */
continue; /* When timeout is negative, never time out. */
/* Check for time-out. */
/* Update time. */
now = GetTickCount64();
if (now >= due)
break;
/* Recompute timeout. */
/* Do not allow the due time to be in the past. */
if (now >= due) {
SetLastError(WAIT_TIMEOUT);
break;
}
/* Recompute time-out argument for GetQueuedCompletionStatus. */
gqcs_timeout = (DWORD)(due - now);
} while (gqcs_timeout > 0);
}
_ep_port_update_events_if_polling(port_info);