int uv_barrier_wait(uv_barrier_t* barrier) {
int serial_thread;
uv_mutex_lock(&barrier->mutex);
if (++barrier->count == barrier->n) {
uv_sem_wait(&barrier->turnstile2);
uv_sem_post(&barrier->turnstile1);
}
uv_mutex_unlock(&barrier->mutex);
uv_sem_wait(&barrier->turnstile1);
uv_sem_post(&barrier->turnstile1);
uv_mutex_lock(&barrier->mutex);
serial_thread = (--barrier->count == 0);
if (serial_thread) {
uv_sem_wait(&barrier->turnstile1);
uv_sem_post(&barrier->turnstile2);
}
uv_mutex_unlock(&barrier->mutex);
uv_sem_wait(&barrier->turnstile2);
uv_sem_post(&barrier->turnstile2);
return serial_thread;
}
/* Set up an IPC pipe server that hands out listen sockets to the worker
* threads. It's kind of cumbersome for such a simple operation, maybe we
* should revive uv_import() and uv_export().
*/
void start_connection_dispatching(uv_handle_type type, unsigned int num_servers, struct server_ctx* servers, char* listen_address, int listen_port)
{
int rc;
struct ipc_server_ctx ctx;
uv_loop_t* loop;
unsigned int i;
loop = uv_default_loop();
ctx.num_connects = num_servers;
if (type == UV_TCP)
{
uv_ip4_addr(listen_address, listen_port, &listen_addr);
rc = uv_tcp_init(loop, (uv_tcp_t*) &ctx.server_handle);
rc = uv_tcp_bind((uv_tcp_t*) &ctx.server_handle, (const struct sockaddr*)&listen_addr, 0);
printf("Listening on %s:%d\n", listen_address, listen_port);
}
rc = uv_pipe_init(loop, &ctx.ipc_pipe, 1);
rc = uv_pipe_bind(&ctx.ipc_pipe, "HAYWIRE_CONNECTION_DISPATCH_PIPE_NAME");
rc = uv_listen((uv_stream_t*) &ctx.ipc_pipe, 128, ipc_connection_cb);
for (i = 0; i < num_servers; i++)
uv_sem_post(&servers[i].semaphore);
rc = uv_run(loop, UV_RUN_DEFAULT);
uv_close((uv_handle_t*) &ctx.server_handle, NULL);
rc = uv_run(loop, UV_RUN_DEFAULT);
for (i = 0; i < num_servers; i++)
uv_sem_wait(&servers[i].semaphore);
}
void connection_consumer_start(void *arg)
{
int rc;
struct server_ctx *ctx;
uv_loop_t* loop;
ctx = arg;
loop = uv_loop_new();
listener_event_loops[ctx->index] = *loop;
http_request_cache_configure_listener(loop, &listener_async_handles[ctx->index]);
uv_barrier_wait(listeners_created_barrier);
rc = uv_async_init(loop, &ctx->async_handle, connection_consumer_close);
uv_unref((uv_handle_t*) &ctx->async_handle);
/* Wait until the main thread is ready. */
uv_sem_wait(&ctx->semaphore);
get_listen_handle(loop, (uv_stream_t*) &ctx->server_handle);
uv_sem_post(&ctx->semaphore);
rc = uv_listen((uv_stream_t*)&ctx->server_handle, 128, connection_consumer_new_connection);
rc = uv_run(loop, UV_RUN_DEFAULT);
uv_loop_delete(loop);
}
void uv__stream_close(uv_stream_t* handle) {
#if defined(__APPLE__)
/* Terminate select loop first */
if (handle->select != NULL) {
uv__stream_select_t* s;
s = handle->select;
uv_sem_post(&s->sem);
uv__stream_osx_interrupt_select(handle);
uv_thread_join(&s->thread);
uv_sem_destroy(&s->sem);
uv_mutex_destroy(&s->mutex);
close(s->fake_fd);
close(s->int_fd);
uv_close((uv_handle_t*) &s->async, uv__stream_osx_cb_close);
handle->select = NULL;
}
#endif /* defined(__APPLE__) */
uv_read_stop(handle);
uv__io_close(handle->loop, &handle->io_watcher);
close(handle->io_watcher.fd);
handle->io_watcher.fd = -1;
if (handle->accepted_fd >= 0) {
close(handle->accepted_fd);
handle->accepted_fd = -1;
}
assert(!uv__io_active(&handle->io_watcher, UV__POLLIN | UV__POLLOUT));
}
void async_worker_free(async_worker_t *const worker) {
if(!worker) return;
assert(!worker->work);
uv_sem_post(worker->sem);
uv_thread_join(worker->thread);
uv_sem_destroy(worker->sem);
uv_close((uv_handle_t *)&worker->async);
free(worker);
}
/* Non-blocking operation. Returns -1 if queue is full */
int queue_push(struct queue *q, struct packet_buffer b) {
int success = uv_sem_trywait(&q->empty_count);
if (success != 0) {
return -1;
}
q->buf[q->tail] = b;
q->tail = (q->tail + 1) % QUEUE_CAP;
uv_sem_post(&q->fill_count);
return 0;
}
/* Non-blocking operation. Returns {0, 0} if queue is empty */
struct packet_buffer queue_pop(struct queue *q) {
int success = uv_sem_trywait(&q->fill_count);
if (success != 0) {
return (struct packet_buffer){.payload_len = 0, .payload = NULL};
}
struct packet_buffer result = q->buf[q->head];
q->head = (q->head + 1) % QUEUE_CAP;
uv_sem_post(&q->empty_count);
return result;
}
static PyObject *
Semaphore_func_post(Semaphore *self)
{
RAISE_IF_NOT_INITIALIZED(self, NULL);
Py_BEGIN_ALLOW_THREADS
uv_sem_post(&self->uv_semaphore);
Py_END_ALLOW_THREADS
Py_RETURN_NONE;
}
static void nub__work_signal_cb(uv_async_t* handle) {
nub_loop_t* loop;
nub_thread_t* thread;
loop = ((nub_thread_t*) handle->data)->nubloop;
while (!fuq_empty(&loop->blocking_queue_)) {
thread = (nub_thread_t*) fuq_dequeue(&loop->blocking_queue_);
uv_sem_post(&thread->thread_lock_sem_);
uv_sem_wait(&loop->loop_lock_sem_);
}
}
void nub_thread_join(nub_thread_t* thread) {
ASSERT(NULL != thread);
thread->disposed = 1;
uv_sem_post(&thread->sem_wait_);
uv_thread_join(&thread->uvthread);
uv_close((uv_handle_t*) thread->async_signal_, nub__free_handle_cb);
uv_sem_destroy(&thread->thread_lock_sem_);
uv_sem_destroy(&thread->sem_wait_);
--thread->nubloop->ref_;
thread->nubloop = NULL;
}
void uv_barrier_wait(uv_barrier_t* barrier) {
uv_mutex_lock(&barrier->mutex);
if (++barrier->count == barrier->n) {
uv_sem_wait(&barrier->turnstile2);
uv_sem_post(&barrier->turnstile1);
}
uv_mutex_unlock(&barrier->mutex);
uv_sem_wait(&barrier->turnstile1);
uv_sem_post(&barrier->turnstile1);
uv_mutex_lock(&barrier->mutex);
if (--barrier->count == 0) {
uv_sem_wait(&barrier->turnstile1);
uv_sem_post(&barrier->turnstile2);
}
uv_mutex_unlock(&barrier->mutex);
uv_sem_wait(&barrier->turnstile2);
uv_sem_post(&barrier->turnstile2);
}
void Thread::thread_worker(void *arg)
{
Thread* self = static_cast<Thread*>(arg);
self->on_run();
uv_async_init(&self->loop, &self->async, &Thread::thread_notify);
uv_sem_post(&self->semaphore);
uv_run(&self->loop, UV_RUN_DEFAULT);
uv_close((uv_handle_t*)&self->async, NULL);
self->on_stop();
}
/* the same */
void
osready(kproc_t* p)
{
Osdep *os;
//hproc_t* hp = up->hproc;
//os = hp->os;
os = p->os;
//print("osready/sem_post: on %p\n",os->sem);
//sem_post(&os->sem);
uv_sem_post(&os->sem);
}
/* To avoid deadlock with uv_cancel() it's crucial that the worker
* never holds the global mutex and the loop-local mutex at the same time.
*/
static void worker(void* arg) {
struct uv__work* w;
QUEUE* q;
uv_sem_post((uv_sem_t*) arg);
arg = NULL;
for (;;) {
uv_mutex_lock(&mutex);
while (QUEUE_EMPTY(&wq)) {
idle_threads += 1;
uv_cond_wait(&cond, &mutex);
idle_threads -= 1;
}
q = QUEUE_HEAD(&wq);
if (q == &exit_message)
uv_cond_signal(&cond);
else {
QUEUE_REMOVE(q);
QUEUE_INIT(q); /* Signal uv_cancel() that the work req is
executing. */
}
uv_mutex_unlock(&mutex);
if (q == &exit_message)
break;
w = QUEUE_DATA(q, struct uv__work, wq);
w->work(w);
uv_mutex_lock(&w->loop->wq_mutex);
w->work = NULL; /* Signal uv_cancel() that the work req is done
executing. */
QUEUE_INSERT_TAIL(&w->loop->wq, &w->wq);
uv_async_send(&w->loop->wq_async);
uv_mutex_unlock(&w->loop->wq_mutex);
}
}
void uv__cf_loop_runner(void* arg) {
uv_loop_t* loop;
loop = arg;
/* Get thread's loop */
ACCESS_ONCE(CFRunLoopRef, loop->cf_loop) = CFRunLoopGetCurrent();
CFRunLoopAddSource(loop->cf_loop,
loop->cf_cb,
kCFRunLoopDefaultMode);
uv_sem_post(&loop->cf_sem);
CFRunLoopRun();
CFRunLoopRemoveSource(loop->cf_loop,
loop->cf_cb,
kCFRunLoopDefaultMode);
}
static void nub__async_prepare_cb(uv_prepare_t* handle) {
nub_loop_t* loop;
nub_thread_t* thread;
nub_work_t* work;
loop = (nub_loop_t*) handle->data;
while (!fuq_empty(&loop->work_queue_)) {
work = (nub_work_t*) fuq_dequeue(&loop->work_queue_);
thread = (nub_thread_t*) work->thread;
if (NUB_LOOP_QUEUE_LOCK == work->work_type) {
uv_sem_post(&thread->thread_lock_sem_);
uv_sem_wait(&loop->loop_lock_sem_);
} else if (NUB_LOOP_QUEUE_WORK == work->work_type) {
work->cb(thread, work, work->arg);
/* TODO(trevnorris): Still need to implement returning status. */
} else {
UNREACHABLE();
}
}
}
void
consumer_start(void *arg) {
uv_loop_t loop;
struct server_context *server = arg;
#ifndef CROSS_COMPILE
char name[24] = {0};
sprintf(name, "consumer-%d", server->index + 1);
pthread_setname_np(pthread_self(), name);
#endif
uv_loop_init(&loop);
struct resolver_context *res = NULL;
if (server->nameserver_num >= 0) {
res = resolver_init(&loop, 0,
server->nameserver_num == 0 ? NULL : server->nameservers, server->nameserver_num);
loop.data = res;
}
tcp_bind(&loop, server);
if (server->udprelay) {
udprelay_start(&loop, server);
}
uv_run(&loop, UV_RUN_DEFAULT);
close_loop(&loop);
if (server->nameserver_num >= 0) {
resolver_destroy(res);
}
uv_sem_post(&server->semaphore);
}
static void signal_handling_worker(void* context) {
enum signal_action action;
uv_signal_t signal1a;
uv_signal_t signal1b;
uv_signal_t signal2;
uv_loop_t loop;
int r;
action = (enum signal_action) (uintptr_t) context;
ASSERT(0 == uv_loop_init(&loop));
/* Setup the signal watchers and start them. */
if (action == ONLY_SIGUSR1 || action == SIGUSR1_AND_SIGUSR2) {
r = uv_signal_init(&loop, &signal1a);
ASSERT(r == 0);
r = uv_signal_start(&signal1a, signal1_cb, SIGUSR1);
ASSERT(r == 0);
r = uv_signal_init(&loop, &signal1b);
ASSERT(r == 0);
r = uv_signal_start(&signal1b, signal1_cb, SIGUSR1);
ASSERT(r == 0);
}
if (action == ONLY_SIGUSR2 || action == SIGUSR1_AND_SIGUSR2) {
r = uv_signal_init(&loop, &signal2);
ASSERT(r == 0);
r = uv_signal_start(&signal2, signal2_cb, SIGUSR2);
ASSERT(r == 0);
}
/* Signal watchers are now set up. */
uv_sem_post(&sem);
/* Wait for all signals. The signal callbacks stop the watcher, so uv_run
* will return when all signal watchers caught a signal.
*/
r = uv_run(&loop, UV_RUN_DEFAULT);
ASSERT(r == 0);
/* Restart the signal watchers. */
if (action == ONLY_SIGUSR1 || action == SIGUSR1_AND_SIGUSR2) {
r = uv_signal_start(&signal1a, signal1_cb, SIGUSR1);
ASSERT(r == 0);
r = uv_signal_start(&signal1b, signal1_cb, SIGUSR1);
ASSERT(r == 0);
}
if (action == ONLY_SIGUSR2 || action == SIGUSR1_AND_SIGUSR2) {
r = uv_signal_start(&signal2, signal2_cb, SIGUSR2);
ASSERT(r == 0);
}
/* Wait for signals once more. */
uv_sem_post(&sem);
r = uv_run(&loop, UV_RUN_DEFAULT);
ASSERT(r == 0);
/* Close the watchers. */
if (action == ONLY_SIGUSR1 || action == SIGUSR1_AND_SIGUSR2) {
uv_close((uv_handle_t*) &signal1a, NULL);
uv_close((uv_handle_t*) &signal1b, NULL);
}
if (action == ONLY_SIGUSR2 || action == SIGUSR1_AND_SIGUSR2) {
uv_close((uv_handle_t*) &signal2, NULL);
}
/* Wait for the signal watchers to close. */
r = uv_run(&loop, UV_RUN_DEFAULT);
ASSERT(r == 0);
uv_loop_close(&loop);
}
void nub_loop_unlock(nub_thread_t* thread) {
uv_sem_post(&thread->nubloop->loop_lock_sem_);
}
static mrb_value
mrb_uv_sem_post(mrb_state *mrb, mrb_value self)
{
uv_sem_t *sem = (uv_sem_t*)mrb_uv_get_ptr(mrb, self, &sem_type);
return uv_sem_post(sem), self;
}
void nub_thread_enqueue(nub_thread_t* thread, nub_work_t* work) {
fuq_enqueue(&thread->incoming_, (void*) work);
uv_sem_post(&thread->sem_wait_);
}
static void embed_cb(uv_async_t* async) {
uv_run(uv_default_loop(), UV_RUN_ONCE);
uv_sem_post(&embed_sem);
}
static void signal_handling_worker(void* context) {
uintptr_t mask = (uintptr_t) context;
uv_loop_t* loop;
uv_signal_t signal1a;
uv_signal_t signal1b;
uv_signal_t signal2;
int r;
loop = uv_loop_new();
ASSERT(loop != NULL);
/* Setup the signal watchers and start them. */
if (mask & SIGUSR1) {
r = uv_signal_init(loop, &signal1a);
ASSERT(r == 0);
r = uv_signal_start(&signal1a, signal1_cb, SIGUSR1);
ASSERT(r == 0);
r = uv_signal_init(loop, &signal1b);
ASSERT(r == 0);
r = uv_signal_start(&signal1b, signal1_cb, SIGUSR1);
ASSERT(r == 0);
}
if (mask & SIGUSR2) {
r = uv_signal_init(loop, &signal2);
ASSERT(r == 0);
r = uv_signal_start(&signal2, signal2_cb, SIGUSR2);
ASSERT(r == 0);
}
/* Signal watchers are now set up. */
uv_sem_post(&sem);
/* Wait for all signals. The signal callbacks stop the watcher, so uv_run
* will return when all signal watchers caught a signal.
*/
r = uv_run(loop);
ASSERT(r == 0);
/* Restart the signal watchers. */
if (mask & SIGUSR1) {
r = uv_signal_start(&signal1a, signal1_cb, SIGUSR1);
ASSERT(r == 0);
r = uv_signal_start(&signal1b, signal1_cb, SIGUSR1);
ASSERT(r == 0);
}
if (mask & SIGUSR2) {
r = uv_signal_start(&signal2, signal2_cb, SIGUSR2);
ASSERT(r == 0);
}
/* Wait for signals once more. */
uv_sem_post(&sem);
r = uv_run(loop);
ASSERT(r == 0);
/* Close the watchers. */
if (mask & SIGUSR1) {
uv_close((uv_handle_t*) &signal1a, NULL);
uv_close((uv_handle_t*) &signal1b, NULL);
}
if (mask & SIGUSR2) {
uv_close((uv_handle_t*) &signal2, NULL);
}
/* Wait for the signal watchers to close. */
r = uv_run(loop);
ASSERT(r == 0);
uv_loop_delete(loop);
}
static void enter(async_worker_t *const worker) {
uv_sem_post(worker->sem);
}
void Semaphore::post()
{
uv_sem_post(&sem);
}
static void unblock_threadpool(void) {
size_t i;
for (i = 0; i < ARRAY_SIZE(pause_reqs); i += 1)
uv_sem_post(pause_sems + i);
}
void
uvm_chime_fill(uvm_chime_t* c, void* value){
c->value = value;
uv_sem_post(&c->sem);
}