nxt_event_conn_... functions and structures have been renamed

to nxt_conn_...

1 files changed, 422 insertions, 0 deletions

diff --git a/src/nxt_conn_write.c b/src/nxt_conn_write.c
new file mode 100644
index 00000000..a2a5737b
--- /dev/null
+++ b/src/nxt_conn_write.c
@@ -0,0 +1,422 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#include <nxt_main.h>
+
+
+static void nxt_conn_write_timer_handler(nxt_task_t *task, void *obj,
+    void *data);
+
+
+void
+nxt_conn_io_write(nxt_task_t *task, void *obj, void *data)
+{
+    ssize_t             ret;
+    nxt_buf_t           *b;
+    nxt_conn_t          *c;
+    nxt_sendbuf_t       sb;
+    nxt_event_engine_t  *engine;
+
+    c = obj;
+
+    nxt_debug(task, "conn write fd:%d", c->socket.fd);
+
+    if (!c->socket.write_ready || c->write == NULL) {
+        return;
+    }
+
+    engine = task->thread->engine;
+
+    c->socket.write_handler = nxt_conn_io_write;
+    c->socket.error_handler = c->write_state->error_handler;
+
+    b = c->write;
+
+    sb.socket = c->socket.fd;
+    sb.error = 0;
+    sb.sent = 0;
+    sb.size = 0;
+    sb.buf = b;
+    sb.limit = 10 * 1024 * 1024;
+    sb.ready = 1;
+    sb.sync = 0;
+
+    do {
+        ret = nxt_conn_io_sendbuf(task, &sb);
+
+        c->socket.write_ready = sb.ready;
+        c->socket.error = sb.error;
+
+        if (ret < 0) {
+            /* ret == NXT_AGAIN || ret == NXT_ERROR. */
+            break;
+        }
+
+        sb.sent += ret;
+        sb.limit -= ret;
+
+        b = nxt_sendbuf_update(b, ret);
+
+        if (b == NULL) {
+            nxt_fd_event_block_write(engine, &c->socket);
+            break;
+        }
+
+        sb.buf = b;
+
+        if (!c->socket.write_ready) {
+            ret = NXT_AGAIN;
+            break;
+        }
+
+    } while (sb.limit != 0);
+
+    nxt_debug(task, "event conn: %i sent:%z", ret, sb.sent);
+
+    if (sb.sent != 0) {
+        if (c->write_state->timer_autoreset) {
+            nxt_timer_disable(engine, &c->write_timer);
+        }
+    }
+
+    if (ret != NXT_ERROR) {
+
+        if (sb.limit == 0) {
+            /*
+             * Postpone writing until next event poll to allow to
+             * process other recevied events and to get new events.
+             */
+            c->write_timer.handler = nxt_conn_write_timer_handler;
+            nxt_timer_add(engine, &c->write_timer, 0);
+
+        } else if (ret == NXT_AGAIN) {
+            /*
+             * SSL libraries can require to toggle either write or read
+             * event if renegotiation occurs during SSL write operation.
+             * This case is handled on the event_io->send() level.  Timer
+             * can be set here because it should be set only for write
+             * direction.
+             */
+            nxt_conn_timer(engine, c, c->write_state, &c->write_timer);
+
+            if (nxt_fd_event_is_disabled(c->socket.write)) {
+                nxt_fd_event_enable_write(engine, &c->socket);
+            }
+        }
+    }
+
+    if (ret == 0 || sb.sent != 0) {
+        /* "ret == 0" means a sync buffer was processed. */
+        c->sent += sb.sent;
+        nxt_work_queue_add(c->write_work_queue, c->write_state->ready_handler,
+                           task, c, data);
+        /*
+         * Fall through if first operations were
+         * successful but the last one failed.
+         */
+    }
+
+    if (nxt_slow_path(ret == NXT_ERROR)) {
+        nxt_fd_event_block_write(engine, &c->socket);
+
+        nxt_work_queue_add(c->write_work_queue, c->write_state->error_handler,
+                           task, c, data);
+    }
+}
+
+
+static void
+nxt_conn_write_timer_handler(nxt_task_t *task, void *obj, void *data)
+{
+    nxt_conn_t   *c;
+    nxt_timer_t  *timer;
+
+    timer = obj;
+
+    nxt_debug(task, "event conn conn timer");
+
+    c = nxt_write_timer_conn(timer);
+    c->delayed = 0;
+
+    c->io->write(task, c, c->socket.data);
+}
+
+
+ssize_t
+nxt_conn_io_sendbuf(nxt_task_t *task, nxt_sendbuf_t *sb)
+{
+    nxt_uint_t    niov;
+    struct iovec  iov[NXT_IOBUF_MAX];
+
+    niov = nxt_sendbuf_mem_coalesce0(task, sb, iov, NXT_IOBUF_MAX);
+
+    if (niov == 0 && sb->sync) {
+        return 0;
+    }
+
+    return nxt_conn_io_writev(task, sb, iov, niov);
+}
+
+
+ssize_t
+nxt_conn_io_writev(nxt_task_t *task, nxt_sendbuf_t *sb, struct iovec *iov,
+    nxt_uint_t niov)
+{
+    ssize_t    n;
+    nxt_err_t  err;
+
+    if (niov == 1) {
+        /* Disposal of surplus kernel iovec copy-in operation. */
+        return nxt_conn_io_send(task, sb, iov[0].iov_base, iov[0].iov_len);
+    }
+
+    for ( ;; ) {
+        n = writev(sb->socket, iov, niov);
+
+        err = (n == -1) ? nxt_socket_errno : 0;
+
+        nxt_debug(task, "writev(%d, %ui): %d", sb->socket, niov, n);
+
+        if (n > 0) {
+            return n;
+        }
+
+        /* n == -1 */
+
+        switch (err) {
+
+        case NXT_EAGAIN:
+            sb->ready = 0;
+            nxt_debug(task, "writev() %E", err);
+
+            return NXT_AGAIN;
+
+        case NXT_EINTR:
+            nxt_debug(task, "writev() %E", err);
+            continue;
+
+        default:
+            sb->error = err;
+            nxt_log(task, nxt_socket_error_level(err),
+                    "writev(%d, %ui) failed %E", sb->socket, niov, err);
+
+            return NXT_ERROR;
+        }
+    }
+}
+
+
+ssize_t
+nxt_conn_io_send(nxt_task_t *task, nxt_sendbuf_t *sb, void *buf, size_t size)
+{
+    ssize_t    n;
+    nxt_err_t  err;
+
+    for ( ;; ) {
+        n = send(sb->socket, buf, size, 0);
+
+        err = (n == -1) ? nxt_socket_errno : 0;
+
+        nxt_debug(task, "send(%d, %p, %uz): %z", sb->socket, buf, size, n);
+
+        if (n > 0) {
+            return n;
+        }
+
+        /* n == -1 */
+
+        switch (err) {
+
+        case NXT_EAGAIN:
+            sb->ready = 0;
+            nxt_debug(task, "send() %E", err);
+
+            return NXT_AGAIN;
+
+        case NXT_EINTR:
+            nxt_debug(task, "send() %E", err);
+            continue;
+
+        default:
+            sb->error = err;
+            nxt_log(task, nxt_socket_error_level(err),
+                    "send(%d, %p, %uz) failed %E", sb->socket, buf, size, err);
+
+            return NXT_ERROR;
+        }
+    }
+}
+
+
+/* Obsolete interfaces. */
+
+size_t
+nxt_event_conn_write_limit(nxt_conn_t *c)
+{
+    ssize_t                 limit, correction;
+    nxt_event_write_rate_t  *rate;
+
+    rate = c->rate;
+
+    if (rate == NULL) {
+        return c->max_chunk;
+    }
+
+    limit = rate->limit;
+    correction = limit - (size_t) rate->average;
+
+    nxt_debug(c->socket.task, "event conn correction:%z average:%0.3f",
+              correction, rate->average);
+
+    limit += correction;
+
+    if (limit <= 0) {
+        return 0;
+    }
+
+    if (rate->limit_after != 0) {
+        limit += rate->limit_after;
+        limit = nxt_min((size_t) limit, rate->max_limit);
+    }
+
+    return nxt_min((size_t) limit, c->max_chunk);
+}
+
+
+nxt_bool_t
+nxt_event_conn_write_delayed(nxt_event_engine_t *engine, nxt_conn_t *c,
+    size_t sent)
+{
+    return 0;
+}
+
+
+ssize_t
+nxt_event_conn_io_write_chunk(nxt_conn_t *c, nxt_buf_t *b, size_t limit)
+{
+    ssize_t  ret;
+
+    ret = c->io->sendbuf(c, b, limit);
+
+    if ((ret == NXT_AGAIN || !c->socket.write_ready)
+        && nxt_fd_event_is_disabled(c->socket.write))
+    {
+        nxt_fd_event_enable_write(c->socket.task->thread->engine, &c->socket);
+    }
+
+    return ret;
+}
+
+
+ssize_t
+nxt_event_conn_io_sendbuf(nxt_conn_t *c, nxt_buf_t *b, size_t limit)
+{
+    nxt_uint_t              niob;
+    struct iovec            iob[NXT_IOBUF_MAX];
+    nxt_sendbuf_coalesce_t  sb;
+
+    sb.buf = b;
+    sb.iobuf = iob;
+    sb.nmax = NXT_IOBUF_MAX;
+    sb.sync = 0;
+    sb.size = 0;
+    sb.limit = limit;
+
+    niob = nxt_sendbuf_mem_coalesce(c->socket.task, &sb);
+
+    if (niob == 0 && sb.sync) {
+        return 0;
+    }
+
+    return nxt_event_conn_io_writev(c, iob, niob);
+}
+
+
+ssize_t
+nxt_event_conn_io_writev(nxt_conn_t *c, nxt_iobuf_t *iob, nxt_uint_t niob)
+{
+    ssize_t    n;
+    nxt_err_t  err;
+
+    if (niob == 1) {
+        /* Disposal of surplus kernel iovec copy-in operation. */
+        return nxt_event_conn_io_send(c, iob->iov_base, iob->iov_len);
+    }
+
+    for ( ;; ) {
+        n = writev(c->socket.fd, iob, niob);
+
+        err = (n == -1) ? nxt_socket_errno : 0;
+
+        nxt_debug(c->socket.task, "writev(%d, %ui): %d", c->socket.fd, niob, n);
+
+        if (n > 0) {
+            return n;
+        }
+
+        /* n == -1 */
+
+        switch (err) {
+
+        case NXT_EAGAIN:
+            nxt_debug(c->socket.task, "writev() %E", err);
+            c->socket.write_ready = 0;
+            return NXT_AGAIN;
+
+        case NXT_EINTR:
+            nxt_debug(c->socket.task, "writev() %E", err);
+            continue;
+
+        default:
+            c->socket.error = err;
+            nxt_log(c->socket.task, nxt_socket_error_level(err),
+                    "writev(%d, %ui) failed %E", c->socket.fd, niob, err);
+            return NXT_ERROR;
+        }
+    }
+}
+
+
+ssize_t
+nxt_event_conn_io_send(nxt_conn_t *c, void *buf, size_t size)
+{
+    ssize_t    n;
+    nxt_err_t  err;
+
+    for ( ;; ) {
+        n = send(c->socket.fd, buf, size, 0);
+
+        err = (n == -1) ? nxt_socket_errno : 0;
+
+        nxt_debug(c->socket.task, "send(%d, %p, %uz): %z",
+                  c->socket.fd, buf, size, n);
+
+        if (n > 0) {
+            return n;
+        }
+
+        /* n == -1 */
+
+        switch (err) {
+
+        case NXT_EAGAIN:
+            nxt_debug(c->socket.task, "send() %E", err);
+            c->socket.write_ready = 0;
+            return NXT_AGAIN;
+
+        case NXT_EINTR:
+            nxt_debug(c->socket.task, "send() %E", err);
+            continue;
+
+        default:
+            c->socket.error = err;
+            nxt_log(c->socket.task, nxt_socket_error_level(err),
+                    "send(%d, %p, %uz) failed %E",
+                    c->socket.fd, buf, size, err);
+            return NXT_ERROR;
+        }
+    }
+}