uv: Upgrade to v0.10.9

deps/uv/ChangeLog

@@ -1,4 +1,17 @@
-2013.05.25, Version 0.10.8 (Stable)
+2013.05.29, Version 0.10.9 (Stable)
+
+Changes since version 0.10.8:
+
+* unix: fix stream refcounting buglet (Ben Noordhuis)
+
+* unix: remove erroneous asserts (Ben Noordhuis)
+
+* unix: add uv__is_closing() macro (Ben Noordhuis)
+
+* unix: stop stream POLLOUT watcher on write error (Ben Noordhuis)
+
+
+2013.05.25, Version 0.10.8 (Stable), 0f39be12926fe2d8766a9f025797a473003e6504
 
 Changes since version 0.10.7:
 

deps/uv/src/unix/core.c

@@ -162,7 +162,12 @@ void uv__make_close_pending(uv_handle_t* handle) {
 
 
 static void uv__finish_close(uv_handle_t* handle) {
-  assert(!uv__is_active(handle));
+  /* Note: while the handle is in the UV_CLOSING state now, it's still possible
+   * for it to be active in the sense that uv__is_active() returns true.
+   * A good example is when the user calls uv_shutdown(), immediately followed
+   * by uv_close(). The handle is considered active at this point because the
+   * completion of the shutdown req is still pending.
+   */
   assert(handle->flags & UV_CLOSING);
   assert(!(handle->flags & UV_CLOSED));
   handle->flags |= UV_CLOSED;
@@ -220,7 +225,7 @@ static void uv__run_closing_handles(uv_loop_t* loop) {
 
 
 int uv_is_closing(const uv_handle_t* handle) {
-  return handle->flags & (UV_CLOSING | UV_CLOSED);
+  return uv__is_closing(handle);
 }
 
 

deps/uv/src/unix/stream.c

@@ -429,6 +429,11 @@ void uv__stream_destroy(uv_stream_t* stream) {
   }
 
   if (stream->shutdown_req) {
+    /* The UV_ECANCELED error code is a lie, the shutdown(2) syscall is a
+     * fait accompli at this point. Maybe we should revisit this in v0.11.
+     * A possible reason for leaving it unchanged is that it informs the
+     * callee that the handle has been destroyed.
+     */
     uv__req_unregister(stream->loop, stream->shutdown_req);
     uv__set_artificial_error(stream->loop, UV_ECANCELED);
     stream->shutdown_req->cb(stream->shutdown_req, -1);
@@ -627,8 +632,6 @@ static void uv__drain(uv_stream_t* stream) {
   uv_shutdown_t* req;
 
   assert(ngx_queue_empty(&stream->write_queue));
-  assert(stream->write_queue_size == 0);
-
   uv__io_stop(stream->loop, &stream->io_watcher, UV__POLLOUT);
 
   /* Shutdown? */
@@ -722,10 +725,8 @@ start:
 
   assert(uv__stream_fd(stream) >= 0);
 
-  if (ngx_queue_empty(&stream->write_queue)) {
+  if (ngx_queue_empty(&stream->write_queue))
-    assert(stream->write_queue_size == 0);
     return;
-  }
 
   q = ngx_queue_head(&stream->write_queue);
   req = ngx_queue_data(q, uv_write_t, queue);
@@ -797,6 +798,9 @@ start:
       /* Error */
       req->error = errno;
       uv__write_req_finish(req);
+      uv__io_stop(stream->loop, &stream->io_watcher, UV__POLLOUT);
+      if (!uv__io_active(&stream->io_watcher, UV__POLLIN))
+        uv__handle_stop(stream);
       return;
     } else if (stream->flags & UV_STREAM_BLOCKING) {
       /* If this is a blocking stream, try again. */
@@ -1200,6 +1204,12 @@ int uv_write2(uv_write_t* req,
       return uv__set_artificial_error(stream->loop, UV_EBADF);
   }
 
+  /* It's legal for write_queue_size > 0 even when the write_queue is empty;
+   * it means there are error-state requests in the write_completed_queue that
+   * will touch up write_queue_size later, see also uv__write_req_finish().
+   * We chould check that write_queue is empty instead but that implies making
+   * a write() syscall when we know that the handle is in error mode.
+   */
   empty_queue = (stream->write_queue_size == 0);
 
   /* Initialize the req */
@@ -1318,9 +1328,10 @@ int uv_read_stop(uv_stream_t* stream) {
          stream->shutdown_req != NULL ||
          stream->connect_req != NULL);
 
-  uv__io_stop(stream->loop, &stream->io_watcher, UV__POLLIN);
-  uv__handle_stop(stream);
   stream->flags &= ~UV_STREAM_READING;
+  uv__io_stop(stream->loop, &stream->io_watcher, UV__POLLIN);
+  if (!uv__io_active(&stream->io_watcher, UV__POLLOUT))
+    uv__handle_stop(stream);
 
 #if defined(__APPLE__)
   /* Notify select() thread about state change */

deps/uv/src/uv-common.h

@@ -149,6 +149,9 @@ void uv__fs_poll_close(uv_fs_poll_t* handle);
 #define uv__is_active(h)                                                      \
   (((h)->flags & UV__HANDLE_ACTIVE) != 0)
 
+#define uv__is_closing(h)                                                     \
+  (((h)->flags & (UV_CLOSING |  UV_CLOSED)) != 0)
+
 #define uv__handle_start(h)                                                   \
   do {                                                                        \
     assert(((h)->flags & UV__HANDLE_CLOSING) == 0);                           \

deps/uv/src/version.c

@@ -34,7 +34,7 @@
 
 #define UV_VERSION_MAJOR 0
 #define UV_VERSION_MINOR 10
-#define UV_VERSION_PATCH 8
+#define UV_VERSION_PATCH 9
 #define UV_VERSION_IS_RELEASE 1