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/*
* Copyright (C) Igor Sysoev
* Copyright (C) NGINX, Inc.
*/
#include <nxt_main.h>
#if (NXT_THREADS)
typedef struct {
nxt_job_t job;
nxt_buf_t *out;
size_t sent;
size_t limit;
nxt_work_handler_t ready_handler;
} nxt_job_sendfile_t;
static void nxt_event_conn_job_sendfile_start(nxt_task_t *task, void *obj,
void *data);
static void nxt_event_conn_job_sendfile_handler(nxt_task_t *task, void *obj,
void *data);
static void nxt_event_conn_job_sendfile_return(nxt_task_t *task, void *obj,
void *data);
static nxt_buf_t *nxt_event_conn_job_sendfile_completion(nxt_task_t *task,
nxt_event_conn_t *c, nxt_buf_t *b);
void
nxt_event_conn_job_sendfile(nxt_task_t *task, nxt_event_conn_t *c)
{
nxt_event_fd_disable(task->thread->engine, &c->socket);
/* A work item data is not used in nxt_event_conn_job_sendfile_start(). */
nxt_event_conn_job_sendfile_start(task, c, NULL);
}
static void
nxt_event_conn_job_sendfile_start(nxt_task_t *task, void *obj, void *data)
{
nxt_iobuf_t b;
nxt_event_conn_t *c;
nxt_job_sendfile_t *jbs;
nxt_sendbuf_coalesce_t sb;
c = obj;
nxt_debug(task, "event conn sendfile fd:%d", c->socket.fd);
jbs = nxt_job_create(c->mem_pool, sizeof(nxt_job_sendfile_t));
if (nxt_slow_path(jbs == NULL)) {
c->write_state->error_handler(task, c, NULL);
return;
}
c->socket.write_handler = nxt_event_conn_job_sendfile_start;
c->socket.error_handler = c->write_state->error_handler;
jbs->job.data = c;
nxt_job_set_name(&jbs->job, "job sendfile");
jbs->limit = nxt_event_conn_write_limit(c);
if (jbs->limit != 0) {
sb.buf = c->write;
sb.iobuf = &b;
sb.nmax = 1;
sb.sync = 0;
sb.size = 0;
sb.limit = jbs->limit;
if (nxt_sendbuf_mem_coalesce(c->socket.task, &sb) != 0 || !sb.sync) {
jbs->job.thread_pool = c->u.thread_pool;
jbs->job.log = c->socket.log;
jbs->out = c->write;
c->write = NULL;
jbs->ready_handler = nxt_event_conn_job_sendfile_return;
c->blocked = 1;
if (c->write_timer.state != NXT_EVENT_TIMER_DISABLED) {
c->write_timer.state = NXT_EVENT_TIMER_BLOCKED;
}
nxt_job_start(task, &jbs->job, nxt_event_conn_job_sendfile_handler);
return;
}
}
nxt_event_conn_job_sendfile_return(task, jbs, c);
}
static void
nxt_event_conn_job_sendfile_handler(nxt_task_t *task, void *obj, void *data)
{
ssize_t ret;
nxt_buf_t *b;
nxt_bool_t first;
nxt_event_conn_t *c;
nxt_job_sendfile_t *jbs;
jbs = obj;
c = data;
nxt_debug(task, "event conn job sendfile fd:%d", c->socket.fd);
first = c->socket.write_ready;
b = jbs->out;
do {
ret = c->io->sendbuf(c, b, jbs->limit);
if (ret == NXT_AGAIN) {
break;
}
if (nxt_slow_path(ret == NXT_ERROR)) {
goto done;
}
jbs->sent += ret;
jbs->limit -= ret;
b = nxt_sendbuf_update(b, ret);
if (b == NULL) {
goto done;
}
if (jbs->limit == 0) {
if (c->rate == NULL) {
jbs->limit = c->max_chunk;
goto fast;
}
goto done;
}
} while (c->socket.write_ready);
if (first && task->thread->thread_pool->work_queue.head != NULL) {
goto fast;
}
done:
nxt_job_return(task, &jbs->job, jbs->ready_handler);
return;
fast:
nxt_work_set(&jbs->job.work, nxt_event_conn_job_sendfile_handler,
jbs->job.task, jbs, c);
nxt_thread_pool_post(task->thread->thread_pool, &jbs->job.work);
}
static void
nxt_event_conn_job_sendfile_return(nxt_task_t *task, void *obj, void *data)
{
size_t sent;
nxt_buf_t *b;
nxt_bool_t done;
nxt_event_conn_t *c;
nxt_job_sendfile_t *jbs;
jbs = obj;
c = data;
c->blocked = 0;
sent = jbs->sent;
c->sent += sent;
nxt_debug(task, "event conn sendfile sent:%z", sent);
b = jbs->out;
/* The job must be destroyed before connection error handler. */
nxt_job_destroy(jbs);
if (c->write_state->process_buffers) {
b = nxt_event_conn_job_sendfile_completion(task, c, b);
done = (b == NULL);
/* Add data which might be added after sendfile job has started. */
nxt_buf_chain_add(&b, c->write);
c->write = b;
if (done) {
/* All data has been sent. */
if (b != NULL) {
/* But new data has been added. */
nxt_event_conn_job_sendfile_start(task, c, NULL);
}
return;
}
}
if (sent != 0 && c->write_state->autoreset_timer) {
nxt_event_timer_disable(&c->write_timer);
} else if (c->write_timer.state == NXT_EVENT_TIMER_BLOCKED) {
c->write_timer.state = NXT_EVENT_TIMER_ACTIVE;
}
if (c->socket.error == 0
&& !nxt_event_conn_write_delayed(task->thread->engine, c, sent))
{
nxt_event_conn_timer(task->thread->engine, c, c->write_state,
&c->write_timer);
nxt_event_fd_oneshot_write(task->thread->engine, &c->socket);
}
if (sent != 0) {
nxt_event_conn_io_handle(task->thread, c->write_work_queue,
c->write_state->ready_handler,
task, c, c->socket.data);
/*
* Fall through if first operations were
* successful but the last one failed.
*/
}
if (nxt_slow_path(c->socket.error != 0)) {
nxt_event_conn_io_handle(task->thread, c->write_work_queue,
c->write_state->error_handler,
task, c, c->socket.data);
}
}
static nxt_buf_t *
nxt_event_conn_job_sendfile_completion(nxt_task_t *task, nxt_event_conn_t *c,
nxt_buf_t *b)
{
while (b != NULL) {
nxt_prefetch(b->next);
if (nxt_buf_is_mem(b) && b->mem.pos != b->mem.free) {
break;
} else if (nxt_buf_is_file(b) && b->file_pos != b->file_end) {
break;
}
nxt_work_queue_add(c->write_work_queue,
b->completion_handler, task, b, b->parent);
b = b->next;
}
return b;
}
#endif
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