static void uv__udp_sendmsg(uv_loop_t* loop,
uv__io_t* w,
unsigned int revents) {
uv_udp_t* handle;
handle = container_of(w, uv_udp_t, io_watcher);
assert(handle->type == UV_UDP);
assert(revents & UV__POLLOUT);
assert(!QUEUE_EMPTY(&handle->write_queue)
|| !QUEUE_EMPTY(&handle->write_completed_queue));
/* Write out pending data first. */
uv__udp_run_pending(handle);
/* Drain 'request completed' queue. */
uv__udp_run_completed(handle);
if (!QUEUE_EMPTY(&handle->write_completed_queue)) {
/* Schedule completion callbacks. */
uv__io_feed(handle->loop, &handle->io_watcher);
}
else if (QUEUE_EMPTY(&handle->write_queue)) {
/* Pending queue and completion queue empty, stop watcher. */
uv__io_stop(loop, &handle->io_watcher, UV__POLLOUT);
if (!uv__io_active(&handle->io_watcher, UV__POLLIN))
uv__handle_stop(handle);
}
}
static void uv__cf_loop_cb(void* arg) {
uv_loop_t* loop;
QUEUE* item;
QUEUE split_head;
uv__cf_loop_signal_t* s;
loop = arg;
uv_mutex_lock(&loop->cf_mutex);
QUEUE_INIT(&split_head);
if (!QUEUE_EMPTY(&loop->cf_signals)) {
QUEUE* split_pos = QUEUE_HEAD(&loop->cf_signals);
QUEUE_SPLIT(&loop->cf_signals, split_pos, &split_head);
}
uv_mutex_unlock(&loop->cf_mutex);
while (!QUEUE_EMPTY(&split_head)) {
item = QUEUE_HEAD(&split_head);
s = QUEUE_DATA(item, uv__cf_loop_signal_t, member);
/* This was a termination signal */
if (s->cb == NULL)
CFRunLoopStop(loop->cf_loop);
else
s->cb(s->arg);
QUEUE_REMOVE(item);
free(s);
}
}
static void uv__loop_delete(uv_loop_t* loop) {
uv__signal_loop_cleanup(loop);
uv__platform_loop_delete(loop);
uv__async_stop(loop, &loop->async_watcher);
if (loop->emfile_fd != -1) {
close(loop->emfile_fd);
loop->emfile_fd = -1;
}
if (loop->backend_fd != -1) {
close(loop->backend_fd);
loop->backend_fd = -1;
}
uv_mutex_lock(&loop->wq_mutex);
assert(QUEUE_EMPTY(&loop->wq) && "thread pool work queue not empty!");
assert(!uv__has_active_reqs(loop));
uv_mutex_unlock(&loop->wq_mutex);
uv_mutex_destroy(&loop->wq_mutex);
#if 0
assert(QUEUE_EMPTY(&loop->pending_queue));
assert(QUEUE_EMPTY(&loop->watcher_queue));
assert(loop->nfds == 0);
#endif
free(loop->watchers);
loop->watchers = NULL;
loop->nwatchers = 0;
}
void uv__work_done(uv_async_t* handle) {
struct uv__work* w;
uv_loop_t* loop;
QUEUE* q;
QUEUE wq;
int err;
loop = container_of(handle, uv_loop_t, wq_async);
QUEUE_INIT(&wq);
uv_mutex_lock(&loop->wq_mutex);
if (!QUEUE_EMPTY(&loop->wq)) {
q = QUEUE_HEAD(&loop->wq);
QUEUE_SPLIT(&loop->wq, q, &wq);
}
uv_mutex_unlock(&loop->wq_mutex);
while (!QUEUE_EMPTY(&wq)) {
q = QUEUE_HEAD(&wq);
QUEUE_REMOVE(q);
w = container_of(q, struct uv__work, wq);
err = (w->work == uv__cancelled) ? UV_ECANCELED : 0;
w->done(w, err);
}
}
void processUsbSendQueue(UsbDevice* usbDevice) {
while(usbDevice->configured &&
!QUEUE_EMPTY(uint8_t, &usbDevice->sendQueue)) {
// Make sure the USB write is 100% complete before messing with this buffer
// after we copy the message into it - the Microchip library doesn't copy
// the data to its own internal buffer. See #171 for background on this
// issue.
if(!waitForHandle(usbDevice)) {
return;
}
int byteCount = 0;
while(!QUEUE_EMPTY(uint8_t, &usbDevice->sendQueue) && byteCount < 64) {
usbDevice->sendBuffer[byteCount++] = QUEUE_POP(uint8_t, &usbDevice->sendQueue);
}
int nextByteIndex = 0;
while(nextByteIndex < byteCount) {
if(!waitForHandle(usbDevice)) {
return;
}
int bytesToTransfer = min(USB_PACKET_SIZE, byteCount - nextByteIndex);
usbDevice->deviceToHostHandle = usbDevice->device.GenWrite(
usbDevice->inEndpoint, &usbDevice->sendBuffer[nextByteIndex], bytesToTransfer);
nextByteIndex += bytesToTransfer;
}
}
}
static void uv__write_callbacks(uv_stream_t* stream) {
uv_write_t* req;
QUEUE* q;
while (!QUEUE_EMPTY(&stream->write_completed_queue)) {
/* Pop a req off write_completed_queue. */
q = QUEUE_HEAD(&stream->write_completed_queue);
req = QUEUE_DATA(q, uv_write_t, queue);
QUEUE_REMOVE(q);
uv__req_unregister(stream->loop, req);
if (req->bufs != NULL) {
stream->write_queue_size -= uv__write_req_size(req);
if (req->bufs != req->bufsml)
free(req->bufs);
req->bufs = NULL;
}
/* NOTE: call callback AFTER freeing the request data. */
if (req->cb)
req->cb(req, req->error);
}
assert(QUEUE_EMPTY(&stream->write_completed_queue));
}
void uv__io_start(uv_loop_t* loop, uv__io_t* w, unsigned int events) {
assert(0 == (events & ~(POLLIN | POLLOUT | UV__POLLRDHUP)));
assert(0 != events);
assert(w->fd >= 0);
assert(w->fd < INT_MAX);
w->pevents |= events;
maybe_resize(loop, w->fd + 1);
#if !defined(__sun)
/* The event ports backend needs to rearm all file descriptors on each and
* every tick of the event loop but the other backends allow us to
* short-circuit here if the event mask is unchanged.
*/
if (w->events == w->pevents) {
if (w->events == 0 && !QUEUE_EMPTY(&w->watcher_queue)) {
QUEUE_REMOVE(&w->watcher_queue);
QUEUE_INIT(&w->watcher_queue);
}
return;
}
#endif
if (QUEUE_EMPTY(&w->watcher_queue))
QUEUE_INSERT_TAIL(&loop->watcher_queue, &w->watcher_queue);
if (loop->watchers[w->fd] == NULL) {
loop->watchers[w->fd] = w;
loop->nfds++;
}
}
void uv__cf_loop_cb(void* arg) {
uv_loop_t* loop;
QUEUE* item;
QUEUE split_head;
uv__cf_loop_signal_t* s;
loop = arg;
uv_mutex_lock(&loop->cf_mutex);
QUEUE_INIT(&split_head);
if (!QUEUE_EMPTY(&loop->cf_signals)) {
QUEUE* split_pos = QUEUE_HEAD(&loop->cf_signals);
QUEUE_SPLIT(&loop->cf_signals, split_pos, &split_head);
}
uv_mutex_unlock(&loop->cf_mutex);
while (!QUEUE_EMPTY(&split_head)) {
item = QUEUE_HEAD(&split_head);
s = QUEUE_DATA(item, uv__cf_loop_signal_t, member);
s->cb(s->arg);
QUEUE_REMOVE(item);
free(s);
}
}
void uv__work_done(uv_async_t* handle) {
struct uv__work* w;
uv_loop_t* loop;
QUEUE* q;
QUEUE wq;
int err;
loop = container_of(handle, uv_loop_t, wq_async);
QUEUE_INIT(&wq);
// uv_mutex_lock(&loop->wq_mutex);
if (!QUEUE_EMPTY(&loop->wq)) {
q = QUEUE_HEAD(&loop->wq);
QUEUE_SPLIT(&loop->wq, q, &wq);
}
// uv_mutex_unlock(&loop->wq_mutex);
while (!QUEUE_EMPTY(&wq)) {
q = QUEUE_HEAD(&wq);
QUEUE_REMOVE(q);
w = container_of(q, struct uv__work, wq);
w->done(w, 0, NULL, 0);
}
}
void processUsbSendQueue(UsbDevice* usbDevice) {
if(usbDevice->configured && vbusEnabled()) {
// if there's nothing attached to the analog input it floats at ~828, so
// if we're powering the board from micro-USB (and the jumper is going
// to 5v and not the analog input), this is still OK.
debug("USB no longer detected - marking unconfigured");
usbDevice->configured = false;
}
// Don't touch usbDevice->sendBuffer if there's still a pending transfer
if(!waitForHandle(usbDevice)) {
return;
}
while(usbDevice->configured &&
!QUEUE_EMPTY(uint8_t, &usbDevice->sendQueue)) {
int byteCount = 0;
while(!QUEUE_EMPTY(uint8_t, &usbDevice->sendQueue) &&
byteCount < USB_SEND_BUFFER_SIZE) {
usbDevice->sendBuffer[byteCount++] = QUEUE_POP(uint8_t,
&usbDevice->sendQueue);
}
int nextByteIndex = 0;
while(nextByteIndex < byteCount) {
// Make sure the USB write is 100% complete before messing with this
// buffer after we copy the message into it - the Microchip library
// doesn't copy the data to its own internal buffer. See #171 for
// background on this issue.
// TODO instead of dropping, replace POP above with a SNAPSHOT
// and POP off only exactly how many bytes were sent after the
// fact.
// TODO in order for this not to fail too often I had to increase
// the USB_HANDLE_MAX_WAIT_COUNT. that may be OK since now we have
// VBUS detection.
if(!waitForHandle(usbDevice)) {
debug("USB not responding in a timely fashion, dropped data");
return;
}
int bytesToTransfer = min(MAX_USB_PACKET_SIZE_BYTES,
byteCount - nextByteIndex);
usbDevice->deviceToHostHandle = usbDevice->device.GenWrite(
usbDevice->inEndpoint,
&usbDevice->sendBuffer[nextByteIndex], bytesToTransfer);
nextByteIndex += bytesToTransfer;
}
}
}
static void uv__udp_run_completed(uv_udp_t* handle) {
uv_udp_send_t* req;
QUEUE* q;
while (!QUEUE_EMPTY(&handle->write_completed_queue)) {
q = QUEUE_HEAD(&handle->write_completed_queue);
QUEUE_REMOVE(q);
req = QUEUE_DATA(q, uv_udp_send_t, queue);
uv__req_unregister(handle->loop, req);
if (req->bufs != req->bufsml)
free(req->bufs);
req->bufs = NULL;
if (req->send_cb == NULL)
continue;
/* req->status >= 0 == bytes written
* req->status < 0 == errno
*/
if (req->status >= 0)
req->send_cb(req, 0);
else
req->send_cb(req, req->status);
}
}
void
uTaskMessageLoop(
void
)
{
Tcb_T *pTcb;
if (!gCore.Flags & CORE_FLAGS_INIT)
{
return;
}
for ( ; ; )
{
/* Has a shutdown request occurred */
if (gCore.Flags & CORE_FLAGS_SHUTDOWN)
{
DBG_MSG(DBG_WARN, "Shutdown request\n");
break;
}
/* If the are any isr queue items, move them into tcb queue */
if (!QUEUE_EMPTY(gCore.IsrQ))
{
pTcb = TcbAlloc();
if (pTcb)
{
QUEUE_GET(gCore.IsrQ, *pTcb);
TcbEnqueue(pTcb);
}
}
pTcb = TcbFront();
if (pTcb)
{
/* Has pTcb expired */
if (TIME_AFTER_EQ(uTaskGetTick(), pTcb->Expire))
{
pTcb = TcbDequeue();
DBG_MSG(DBG_TRACE, "Delay(%ld) Task %p Id %d pMsg %p\n",
uTaskGetTick()-pTcb->Expire,
pTcb->pTask,
pTcb->Id,
pTcb->pMsg);
/* Send the message to the task */
pTcb->pTask->Handler(pTcb->pTask, pTcb->Id, pTcb->pMsg);
/* Free the message structure */
uTaskFree(pTcb->pMsg);
TcbFree(pTcb);
}
}
}
}
static void uv__drain(uv_stream_t* stream) {
uv_shutdown_t* req;
int err;
assert(QUEUE_EMPTY(&stream->write_queue));
uv__io_stop(stream->loop, &stream->io_watcher, UV__POLLOUT);
/* Shutdown? */
if ((stream->flags & UV_STREAM_SHUTTING) &&
!(stream->flags & UV_CLOSING) &&
!(stream->flags & UV_STREAM_SHUT)) {
assert(stream->shutdown_req);
req = stream->shutdown_req;
stream->shutdown_req = NULL;
stream->flags &= ~UV_STREAM_SHUTTING;
uv__req_unregister(stream->loop, req);
err = 0;
if (tuvp_shutdown(uv__stream_fd(stream), SHUT_WR))
err = -errno;
if (err == 0)
stream->flags |= UV_STREAM_SHUT;
if (req->cb != NULL)
req->cb(req, err);
}
}
void uv__loop_close(uv_loop_t* loop) {
size_t i;
uv__loops_remove(loop);
/* close the async handle without needing an extra loop iteration */
assert(!loop->wq_async.async_sent);
loop->wq_async.close_cb = NULL;
uv__handle_closing(&loop->wq_async);
uv__handle_close(&loop->wq_async);
for (i = 0; i < ARRAY_SIZE(loop->poll_peer_sockets); i++) {
SOCKET sock = loop->poll_peer_sockets[i];
if (sock != 0 && sock != INVALID_SOCKET)
closesocket(sock);
}
uv_mutex_lock(&loop->wq_mutex);
assert(QUEUE_EMPTY(&loop->wq) && "thread pool work queue not empty!");
assert(!uv__has_active_reqs(loop));
uv_mutex_unlock(&loop->wq_mutex);
uv_mutex_destroy(&loop->wq_mutex);
uv__free(loop->timer_heap);
loop->timer_heap = NULL;
CloseHandle(loop->iocp);
}
void uv__udp_finish_close(uv_udp_t* handle) {
uv_udp_send_t* req;
QUEUE* q;
assert(!uv__io_active(&handle->io_watcher, UV__POLLIN | UV__POLLOUT));
assert(handle->io_watcher.fd == -1);
uv__udp_run_completed(handle);
while (!QUEUE_EMPTY(&handle->write_queue)) {
q = QUEUE_HEAD(&handle->write_queue);
QUEUE_REMOVE(q);
req = QUEUE_DATA(q, uv_udp_send_t, queue);
uv__req_unregister(handle->loop, req);
if (req->bufs != req->bufsml)
free(req->bufs);
req->bufs = NULL;
if (req->send_cb != NULL)
req->send_cb(req, -ECANCELED);
}
/* Now tear down the handle. */
handle->recv_cb = NULL;
handle->alloc_cb = NULL;
/* but _do not_ touch close_cb */
}
void uv__udp_finish_close(uv_udp_t* handle) {
uv_udp_send_t* req;
QUEUE* q;
assert(!uv__io_active(&handle->io_watcher, UV__POLLIN | UV__POLLOUT));
assert(handle->io_watcher.fd == -1);
while (!QUEUE_EMPTY(&handle->write_queue)) {
q = QUEUE_HEAD(&handle->write_queue);
QUEUE_REMOVE(q);
req = QUEUE_DATA(q, uv_udp_send_t, queue);
req->status = -ECANCELED;
QUEUE_INSERT_TAIL(&handle->write_completed_queue, &req->queue);
}
uv__udp_run_completed(handle);
assert(handle->send_queue_size == 0);
assert(handle->send_queue_count == 0);
/* Now tear down the handle. */
handle->recv_cb = NULL;
handle->alloc_cb = NULL;
/* but _do not_ touch close_cb */
}
void uv__io_stop(uv_loop_t* loop, uv__io_t* w, unsigned int events) {
assert(0 == (events & ~(POLLIN | POLLOUT | UV__POLLRDHUP)));
assert(0 != events);
if (w->fd == -1)
return;
assert(w->fd >= 0);
/* Happens when uv__io_stop() is called on a handle that was never started. */
if ((unsigned) w->fd >= loop->nwatchers)
return;
w->pevents &= ~events;
if (w->pevents == 0) {
QUEUE_REMOVE(&w->watcher_queue);
QUEUE_INIT(&w->watcher_queue);
if (loop->watchers[w->fd] != NULL) {
assert(loop->watchers[w->fd] == w);
assert(loop->nfds > 0);
loop->watchers[w->fd] = NULL;
loop->nfds--;
w->events = 0;
}
}
else if (QUEUE_EMPTY(&w->watcher_queue))
QUEUE_INSERT_TAIL(&loop->watcher_queue, &w->watcher_queue);
}
int uv_loop_fork(uv_loop_t* loop) {
int err;
unsigned int i;
uv__io_t* w;
err = uv__io_fork(loop);
if (err)
return err;
err = uv__async_fork(loop);
if (err)
return err;
err = uv__signal_loop_fork(loop);
if (err)
return err;
/* Rearm all the watchers that aren't re-queued by the above. */
for (i = 0; i < loop->nwatchers; i++) {
w = loop->watchers[i];
if (w == NULL)
continue;
if (w->pevents != 0 && QUEUE_EMPTY(&w->watcher_queue)) {
w->events = 0; /* Force re-registration in uv__io_poll. */
QUEUE_INSERT_TAIL(&loop->watcher_queue, &w->watcher_queue);
}
}
return 0;
}
/* ----------------------------------------------------------------------------*/
void* queue_out(Queue *queue)
{
if (queue == NULL){
ERROR("Null pointer!");
return NULL;
}
if (QUEUE_EMPTY(queue)){
INFO("Queue is empty!");
return NULL;
}
void *ret = queue->head->element;
QueueNode *node = queue->head;
/**
* only one node in the queue or not
*/
if (queue->tail == node){
queue->head = NULL;
queue->tail = NULL;
}else{
queue->head = node->next;
}
queue->queue_size--;
/**
* insert one node into the spare list(in the head)
*/
node->element = NULL;
node->next = queue->spare;
queue->spare = node;
return ret;
}
/* ----------------------------------------------------------------------------*/
int queue_delete(Queue *queue, handle destroy_node)
{
if (queue == NULL){
ERROR("Null pointer!");
return -1;
}
int ret = 0;
if (!QUEUE_EMPTY(queue))
queue_clear(queue, destroy_node);
/**
* free spare list
*/
QueueNode *node = queue->spare;
QueueNode *temp;
while (node){
temp = node;
node = node->next;
temp->next = NULL;
free(temp);
}
ret = queue->node_count;
queue->spare = NULL;
queue->node_count = 0;
return ret;
}
static void uv__inotify_read(uv_loop_t* loop,
uv__io_t* dummy,
unsigned int events) {
const struct uv__inotify_event* e;
struct watcher_list* w;
uv_fs_event_t* h;
QUEUE queue;
QUEUE* q;
const char* path;
ssize_t size;
const char *p;
/* needs to be large enough for sizeof(inotify_event) + strlen(path) */
char buf[4096];
while (1) {
do
size = read(loop->inotify_fd, buf, sizeof(buf));
while (size == -1 && errno == EINTR);
if (size == -1) {
assert(errno == EAGAIN || errno == EWOULDBLOCK);
break;
}
assert(size > 0); /* pre-2.6.21 thing, size=0 == read buffer too small */
/* Now we have one or more inotify_event structs. */
for (p = buf; p < buf + size; p += sizeof(*e) + e->len) {
e = (const struct uv__inotify_event*)p;
events = 0;
if (e->mask & (UV__IN_ATTRIB|UV__IN_MODIFY))
events |= UV_CHANGE;
if (e->mask & ~(UV__IN_ATTRIB|UV__IN_MODIFY))
events |= UV_RENAME;
w = find_watcher(loop, e->wd);
if (w == NULL)
continue; /* Stale event, no watchers left. */
/* inotify does not return the filename when monitoring a single file
* for modifications. Repurpose the filename for API compatibility.
* I'm not convinced this is a good thing, maybe it should go.
*/
path = e->len ? (const char*) (e + 1) : uv__basename_r(w->path);
QUEUE_MOVE(&w->watchers, &queue);
while (!QUEUE_EMPTY(&queue)) {
q = QUEUE_HEAD(&queue);
h = QUEUE_DATA(q, uv_fs_event_t, watchers);
QUEUE_REMOVE(q);
QUEUE_INSERT_TAIL(&w->watchers, q);
h->cb(h, path, events, 0);
}
}
}
}
END_TEST
START_TEST (test_successful_write)
{
sendCanSignal(&SIGNALS[0], cJSON_CreateNumber(0xa), SIGNALS, SIGNAL_COUNT);
processCanWriteQueue(&bus);
fail_unless(QUEUE_EMPTY(CanMessage, &SIGNALS[1].message->bus->sendQueue));
}
static int uv__loop_alive(uv_loop_t* loop) {
/*printf("la -> %d %d alive-> %d \n", loop->active_handles, loop->fakeHandle,
loop->active_handles > loop->fakeHandle ||
!QUEUE_EMPTY(&loop->active_reqs) ||
loop->endgame_handles != NULL); fflush(stdout);*/
return loop->active_handles > loop->fakeHandle ||
!QUEUE_EMPTY(&loop->active_reqs) || loop->endgame_handles != NULL;
}
void uv_loop_alive(uv_loop_t* loop, int* a, int* b, int* c) {
// printf("lap -> %d %d \n", loop->active_handles, loop->fakeHandle);
// fflush(stdout);
int n = loop->active_handles - loop->fakeHandle;
*a = n >= 0 ? n : 0;
*b = !QUEUE_EMPTY(&loop->active_reqs);
*c = loop->endgame_handles != NULL;
}
/*
* Check to see if a packet has been received. If so, read the packet and print
* the packet payload to the serial monitor.
*/
void receiveCan(CanBus* bus) {
// TODO what happens if we process until the queue is empty?
if(!QUEUE_EMPTY(CanMessage, &bus->receiveQueue)) {
CanMessage message = QUEUE_POP(CanMessage, &bus->receiveQueue);
decodeCanMessage(bus, message.id, message.data);
bus->lastMessageReceived = systemTimeMs();
}
}
END_TEST
START_TEST (test_missing_callback)
{
QUEUE_PUSH(uint8_t, &queue, (uint8_t) 128);
processQueue(&queue, NULL);
fail_if(called);
fail_if(QUEUE_EMPTY(uint8_t, &queue));
}
int uv_backend_timeout(const uv_loop_t* loop) {
if (loop->stop_flag != 0)
return 0;
if (!uv__has_active_handles(loop) && !uv__has_active_reqs(loop))
return 0;
if (!QUEUE_EMPTY(&loop->idle_handles))
return 0;
if (!QUEUE_EMPTY(&loop->pending_queue))
return 0;
if (loop->closing_handles)
return 0;
return uv__next_timeout(loop);
}
END_TEST
START_TEST (test_no_write_handler)
{
sendCanSignal(&SIGNALS[0], cJSON_CreateNumber(0xa), SIGNALS, SIGNAL_COUNT);
bus.writeHandler = NULL;
processCanWriteQueue(&bus);
fail_unless(QUEUE_EMPTY(CanMessage, &SIGNALS[1].message->bus->sendQueue));
}
static int uv__run_pending(uv_loop_t* loop) {
QUEUE* q;
uv__io_t* w;
if (QUEUE_EMPTY(&loop->pending_queue))
return 0;
while (!QUEUE_EMPTY(&loop->pending_queue)) {
q = QUEUE_HEAD(&loop->pending_queue);
QUEUE_REMOVE(q);
QUEUE_INIT(q);
w = QUEUE_DATA(q, uv__io_t, pending_queue);
w->cb(loop, w, UV__POLLOUT);
}
return 1;
}
static void maybe_free_watcher_list(struct watcher_list* w, uv_loop_t* loop) {
/* if the watcher_list->watchers is being iterated over, we can't free it. */
if ((!w->iterating) && QUEUE_EMPTY(&w->watchers)) {
/* No watchers left for this path. Clean up. */
RB_REMOVE(watcher_root, CAST(&loop->inotify_watchers), w);
uv__inotify_rm_watch(loop->inotify_fd, w->wd);
uv__free(w);
}
}