static
NTSTATUS
ProcessRunnable(
PEPOLL_THREAD pThread,
PRING pRunnable,
PRING pTimed,
PRING pWaiting,
LONG64 llNow
)
{
NTSTATUS status = STATUS_SUCCESS;
ULONG ulTicks = MAX_TICKS;
PLW_TASK pTask = NULL;
PLW_TASK_GROUP pGroup = NULL;
PRING pRing = NULL;
PRING pNext = NULL;
/* We are guaranteed to run each task at least once. If tasks remain
on the runnable list by yielding, we will continue to run them
all in a round robin until our ticks are depleted. */
while (ulTicks && !RingIsEmpty(pRunnable))
{
for (pRing = pRunnable->pNext; pRing != pRunnable; pRing = pNext)
{
pNext = pRing->pNext;
pTask = LW_STRUCT_FROM_FIELD(pRing, EPOLL_TASK, QueueRing);
RunTask(pTask, llNow);
if (ulTicks)
{
ulTicks--;
}
if (pTask->EventWait != LW_TASK_EVENT_COMPLETE)
{
/* Task is still waiting to be runnable, update events in epoll set */
status = UpdateEventWait(
pTask,
pThread->EpollFd
);
GOTO_ERROR_ON_STATUS(status);
if (pTask->EventWait & LW_TASK_EVENT_YIELD)
{
/* Task is yielding. Set YIELD in its trigger arguments and
and leave it on the runnable list for the next iteration */
pTask->EventArgs |= LW_TASK_EVENT_YIELD;
}
else if (pTask->EventWait & LW_TASK_EVENT_TIME)
{
/* If the task is waiting for a timeout, insert it into the timed queue */
RingRemove(&pTask->QueueRing);
InsertTimedQueue(pTimed, pTask);
}
else
{
/* Otherwise, put it in the generic waiting queue */
RingRemove(&pTask->QueueRing);
RingEnqueue(pWaiting, &pTask->QueueRing);
}
}
else
{
/* Task is complete */
RingRemove(&pTask->QueueRing);
/* Turn off any fd in the epoll set */
if (pTask->Fd >= 0)
{
status = LwRtlSetTaskFd(pTask, pTask->Fd, 0);
GOTO_ERROR_ON_STATUS(status);
}
/* Unsubscribe task from any UNIX signals */
if (pTask->pUnixSignal)
{
RegisterTaskUnixSignal(pTask, 0, FALSE);
}
LOCK_POOL(pThread->pPool);
pThread->ulLoad--;
UNLOCK_POOL(pThread->pPool);
pGroup = pTask->pGroup;
/* If task was in a task group, remove it and notify anyone waiting
on the group */
if (pGroup)
{
LOCK_GROUP(pGroup);
pTask->pGroup = NULL;
RingRemove(&pTask->GroupRing);
pthread_cond_broadcast(&pGroup->Event);
UNLOCK_GROUP(pGroup);
}
LOCK_THREAD(pThread);
if (--pTask->ulRefCount)
{
/* The task still has a reference, so mark it as completed
and notify anyone waiting on it */
pTask->EventSignal = TASK_COMPLETE_MASK;
pthread_cond_broadcast(&pThread->Event);
UNLOCK_THREAD(pThread);
}
else
{
/* We held the last reference to the task, so delete it */
RingRemove(&pTask->SignalRing);
UNLOCK_THREAD(pThread);
TaskDelete(pTask);
}
}
}
}
error:
return status;
}
static
VOID
Transceiver(
PLW_TASK pTask,
PVOID pContext,
LW_TASK_EVENT_MASK WakeMask,
LW_TASK_EVENT_MASK* pWaitMask,
PLONG64 pllTime
)
{
PSOCKET pSocket = (PSOCKET) pContext;
size_t sendSize = gpSettings->ulBufferSize / gpSettings->usSendSegments;
ssize_t transferred = 0;
NTSTATUS status;
long opts = 0;
int err = 0;
if (WakeMask & LW_TASK_EVENT_CANCEL ||
pSocket->Iteration >= gpSettings->ulIterations)
{
*pWaitMask = 0;
status = LwRtlSetTaskFd(pTask, pSocket->Fd, 0);
ASSERT_SUCCESS(status);
close(pSocket->Fd);
pSocket->Fd = -1;
return;
}
else if (WakeMask & LW_TASK_EVENT_INIT)
{
assert(pSocket->Iteration == 0);
/* Put socket in nonblock mode */
opts = fcntl(pSocket->Fd, F_GETFL, 0);
assert(opts >= 0);
opts |= O_NONBLOCK;
err = fcntl(pSocket->Fd, F_SETFL, opts);
LW_ASSERT(err == 0);
status = LwRtlSetTaskFd(
pTask,
pSocket->Fd,
LW_TASK_EVENT_FD_READABLE | LW_TASK_EVENT_FD_WRITABLE);
ASSERT_SUCCESS(status);
}
switch(pSocket->State)
{
case STATE_SEND:
if (sendSize > gpSettings->ulBufferSize - pSocket->Position)
sendSize = gpSettings->ulBufferSize - pSocket->Position;
transferred = write(
pSocket->Fd,
pSocket->pBuffer + pSocket->Position,
sendSize);
assert(transferred >= 0 || errno == EAGAIN);
if (transferred < 0 && errno == EAGAIN)
{
*pWaitMask = LW_TASK_EVENT_FD_WRITABLE;
break;
}
pSocket->Position += transferred;
pSocket->ullTotalTransferred += transferred;
if (pSocket->Position >= gpSettings->ulBufferSize)
{
pSocket->State = STATE_RECV;
pSocket->Position = 0;
pSocket->Iteration++;
}
*pWaitMask = LW_TASK_EVENT_YIELD;
break;
case STATE_RECV:
transferred = read(
pSocket->Fd,
pSocket->pBuffer + pSocket->Position,
gpSettings->ulBufferSize - pSocket->Position);
assert(transferred >= 0 || errno == EAGAIN);
if (transferred < 0 && errno == EAGAIN)
{
*pWaitMask = LW_TASK_EVENT_FD_READABLE;
break;
}
pSocket->Position += transferred;
pSocket->ullTotalTransferred += transferred;
if (pSocket->Position >= gpSettings->ulBufferSize)
{
pSocket->State = STATE_SEND;
pSocket->Position = 0;
pSocket->Iteration++;
}
*pWaitMask = LW_TASK_EVENT_YIELD;
break;
}
}
static
VOID
ProcessRunnable(
PKQUEUE_THREAD pThread,
PKQUEUE_COMMANDS pCommands,
PRING pRunnable,
PRING pTimed,
PRING pWaiting,
LONG64 llNow
)
{
ULONG ulTicks = MAX_TICKS;
PLW_TASK pTask = NULL;
PLW_TASK_GROUP pGroup = NULL;
PRING pRing = NULL;
PRING pNext = NULL;
/* We are guaranteed to run each task at least once. If tasks remain
on the runnable list by yielding, we will continue to run them
all in a round robin until our ticks are depleted. */
while (ulTicks && !RingIsEmpty(pRunnable))
{
for (pRing = pRunnable->pNext; pRing != pRunnable; pRing = pNext)
{
pNext = pRing->pNext;
pTask = LW_STRUCT_FROM_FIELD(pRing, KQUEUE_TASK, QueueRing);
RunTask(pTask, llNow);
if (ulTicks)
{
ulTicks--;
}
if (pTask->EventWait != LW_TASK_EVENT_COMPLETE)
{
if (pTask->EventWait & LW_TASK_EVENT_YIELD)
{
/* Task is yielding. Set the YIELD flag and
leave it on the runnable list for the next iteration. */
pTask->EventArgs |= LW_TASK_EVENT_YIELD;
}
else
{
/* Task is still waiting on events, update kqueue */
UpdateEventWait(pCommands, pTask);
if (pTask->EventWait & LW_TASK_EVENT_TIME)
{
/* If the task is waiting for a timeout,
insert it into the timed queue */
RingRemove(&pTask->QueueRing);
InsertTimedQueue(pTimed, pTask);
}
else
{
/* Otherwise, put it in the generic waiting queue */
RingRemove(&pTask->QueueRing);
RingEnqueue(pWaiting, &pTask->QueueRing);
}
}
}
else
{
/* Task is complete */
RingRemove(&pTask->QueueRing);
/* Remove any associated events from the kqueue */
if (pTask->Fd >= 0)
{
(void) LwRtlSetTaskFd(pTask, pTask->Fd, 0);
}
/* Unsubscribe task from any UNIX signals */
if (pTask->pUnixSignal)
{
RegisterTaskUnixSignal(pTask, 0, FALSE);
}
LOCK_POOL(pThread->pPool);
pThread->ulLoad--;
UNLOCK_POOL(pThread->pPool);
pGroup = pTask->pGroup;
/* If task was in a task group, remove it and notify anyone waiting
on the group */
if (pGroup)
{
LOCK_GROUP(pGroup);
pTask->pGroup = NULL;
RingRemove(&pTask->GroupRing);
pthread_cond_broadcast(&pGroup->Event);
UNLOCK_GROUP(pGroup);
}
LOCK_THREAD(pThread);
if (--pTask->ulRefCount)
{
/* The task still has a reference, so mark it as completed
and notify anyone waiting on it */
pTask->EventSignal = TASK_COMPLETE_MASK;
pthread_cond_broadcast(&pThread->Event);
UNLOCK_THREAD(pThread);
}
else
{
/* We held the last reference to the task, so delete it */
RingRemove(&pTask->SignalRing);
UNLOCK_THREAD(pThread);
TaskDelete(pTask);
}
}
}
}
/* Update kevent commands for yielding tasks */
for (pRing = pRunnable->pNext; pRing != pRunnable; pRing = pRing->pNext)
{
pTask = LW_STRUCT_FROM_FIELD(pRing, KQUEUE_TASK, QueueRing);
if (pTask->EventArgs & LW_TASK_EVENT_YIELD)
{
UpdateEventWait(pCommands, pTask);
}
}
}
static
VOID
LogTapper(
PLW_TASK pTask,
PVOID pContext,
LW_TASK_EVENT_MASK WakeMask,
LW_TASK_EVENT_MASK* pWaitMask,
LONG64* pllTime
)
{
NTSTATUS status = STATUS_SUCCESS;
int FifoFd = *(int*) pContext;
siginfo_t info = {0};
char buffer[2048] = {0};
ssize_t count = 0;
if (WakeMask & LW_TASK_EVENT_CANCEL)
{
status = STATUS_CANCELLED;
BAIL_ON_ERROR(status);
}
else if (WakeMask & LW_TASK_EVENT_INIT)
{
status = LwRtlSetTaskUnixSignal(pTask, SIGINT, TRUE);
BAIL_ON_ERROR(status);
status = LwRtlSetTaskUnixSignal(pTask, SIGTERM, TRUE);
BAIL_ON_ERROR(status);
status = LwRtlSetTaskFd(pTask, FifoFd, LW_TASK_EVENT_FD_READABLE);
BAIL_ON_ERROR(status);
}
else if (WakeMask & LW_TASK_EVENT_UNIX_SIGNAL)
{
while (LwRtlNextTaskUnixSignal(pTask, &info))
{
if (info.si_signo == SIGINT || info.si_signo == SIGTERM)
{
status = STATUS_CANCELLED;
BAIL_ON_ERROR(status);
}
}
}
else if (WakeMask & LW_TASK_EVENT_FD_READABLE)
{
do
{
do
{
count = read(FifoFd, buffer, sizeof(buffer));
} while (count < 0 && errno == EINTR);
if (count == 0)
{
status = STATUS_END_OF_FILE;
BAIL_ON_ERROR(status);
}
else if (count > 0)
{
count = write(1, buffer, count);
if (count < 0)
{
status = LwErrnoToNtStatus(errno);
BAIL_ON_ERROR(status);
}
}
else if (errno != EAGAIN)
{
status = LwErrnoToNtStatus(errno);
BAIL_ON_ERROR(status);
}
} while (count > 0);
}
*pWaitMask = LW_TASK_EVENT_FD_READABLE | LW_TASK_EVENT_UNIX_SIGNAL;
cleanup:
return;
error:
*pWaitMask = LW_TASK_EVENT_COMPLETE;
LwRtlSetTaskFd(pTask, FifoFd, 0);
LwRtlExitMain(status);
goto cleanup;
}
