unix: run callbacks of pending writes when handle is closed

src/unix/core.c

@@ -235,6 +235,8 @@ void uv__finish_close(uv_handle_t* handle) {
     case UV_TCP:
       assert(!ev_is_active(&((uv_stream_t*)handle)->read_watcher));
       assert(!ev_is_active(&((uv_stream_t*)handle)->write_watcher));
+      assert(((uv_stream_t*)handle)->fd == -1);
+      uv__stream_destroy((uv_stream_t*)handle);
       break;
 
     case UV_UDP:

src/unix/internal.h

@@ -81,6 +81,7 @@ void uv_fatal_error(const int errorno, const char* syscall);
 
 /* stream */
 int uv__stream_open(uv_stream_t*, int fd, int flags);
+void uv__stream_destroy(uv_stream_t* stream);
 void uv__stream_io(EV_P_ ev_io* watcher, int revents);
 void uv__server_io(EV_P_ ev_io* watcher, int revents);
 int uv__accept(int sockfd, struct sockaddr* saddr, socklen_t len);

src/unix/stream.c

@@ -75,6 +75,35 @@ int uv__stream_open(uv_stream_t* stream, int fd, int flags) {
 }
 
 
+/* Clears out the write queue, invokes the callbacks attached
+ * to each write request. Used when a stream is destroyed.
+ */
+static void uv__clear_queue(ngx_queue_t* wq, int status, uv_err_code code) {
+  uv_write_t* req;
+  ngx_queue_t* q;
+
+  while (!ngx_queue_empty(wq)) {
+    q = ngx_queue_head(wq);
+    ngx_queue_remove(q);
+
+    req = ngx_queue_data(q, uv_write_t, queue);
+    if (req->cb) {
+      uv_err_new(req->handle->loop, code);
+      req->cb(req, status);
+    }
+
+    if (req->bufs != req->bufsml)
+      free(req->bufs);
+  }
+}
+
+
+void uv__stream_destroy(uv_stream_t* stream) {
+  uv__clear_queue(&stream->write_queue, -1, UV_EINTR);
+  uv__clear_queue(&stream->write_completed_queue, 0, UV_OK);
+}
+
+
 void uv__server_io(EV_P_ ev_io* watcher, int revents) {
   int fd;
   struct sockaddr_storage addr;