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Don't assume __aio_find_req_fd succeeds since the request might already be processed. Don't do the list handling here, call __aio_remove_request.

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This commit is contained in:
Ulrich Drepper 2000-07-27 09:38:42 +00:00
parent da8f38c504
commit 950c1194b1
1 changed files with 13 additions and 35 deletions
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48
rt/aio_cancel.c
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@ -56,16 +56,20 @@ aio_cancel (fildes, aiocbp)
req = __aio_find_req_fd (fildes);
if (req == NULL)
{
not_found:
pthread_mutex_unlock (&__aio_requests_mutex);
__set_errno (EINVAL);
return -1;
}
while (req->aiocbp != (aiocb_union *) aiocbp)
{
last = req;
req = req->next_prio;
if (req == NULL)
{
pthread_mutex_unlock (&__aio_requests_mutex);
__set_errno (EINVAL);
return -1;
}
goto not_found;
}
/* Don't remove the entry if a thread is already working on it. */
@ -74,28 +78,7 @@ aio_cancel (fildes, aiocbp)
else if (req->running == yes)
{
/* We can remove the entry. */
if (last != NULL)
last->next_prio = req->next_prio;
else
if (req->next_prio == NULL)
{
if (req->last_fd != NULL)
req->last_fd->next_fd = req->next_fd;
if (req->next_fd != NULL)
req->next_fd->last_fd = req->last_fd;
}
else
{
if (req->last_fd != NULL)
req->last_fd->next_fd = req->next_prio;
if (req->next_fd != NULL)
req->next_fd->last_fd = req->next_prio;
req->next_prio->last_fd = req->last_fd;
req->next_prio->next_fd = req->next_fd;
/* Mark this entry as runnable. */
req->next_prio->running = yes;
}
__aio_remove_request (last, req, 0);
result = AIO_CANCELED;
}
@ -122,15 +105,10 @@ aio_cancel (fildes, aiocbp)
result = AIO_NOTCANCELED;
}
else
{
/* Remove entry from the file descriptor list. */
if (req->last_fd != NULL)
req->last_fd->next_fd = req->next_fd;
if (req->next_fd != NULL)
req->next_fd->last_fd = req->last_fd;
result = AIO_CANCELED;
result = AIO_CANCELED;
}
/* We can remove the entry. */
__aio_remove_request (NULL, req, 1);
}
}