Progress on splitting things up

1 files changed, 101 insertions, 0 deletions

diff --git a/src/core/transport/chttp2/stream_lists.c b/src/core/transport/chttp2/stream_lists.c
new file mode 100644
index 0000000000..180a4de240
--- /dev/null
+++ b/src/core/transport/chttp2/stream_lists.c
@@ -0,0 +1,101 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/* core list management */
+
+static int stream_list_empty(grpc_chttp2_transport *t,
+                             grpc_chttp2_stream_list_id id) {
+  return t->lists[id].head == NULL;
+}
+
+static grpc_chttp2_stream *stream_list_remove_head(
+    grpc_chttp2_transport *t, grpc_chttp2_stream_list_id id) {
+  grpc_chttp2_stream *s = t->lists[id].head;
+  if (s) {
+    grpc_chttp2_stream *new_head = s->links[id].next;
+    GPR_ASSERT(s->included[id]);
+    if (new_head) {
+      t->lists[id].head = new_head;
+      new_head->links[id].prev = NULL;
+    } else {
+      t->lists[id].head = NULL;
+      t->lists[id].tail = NULL;
+    }
+    s->included[id] = 0;
+  }
+  return s;
+}
+
+static void stream_list_remove(grpc_chttp2_transport *t, grpc_chttp2_stream *s,
+                               grpc_chttp2_stream_list_id id) {
+  if (!s->included[id]) return;
+  s->included[id] = 0;
+  if (s->links[id].prev) {
+    s->links[id].prev->links[id].next = s->links[id].next;
+  } else {
+    GPR_ASSERT(t->lists[id].head == s);
+    t->lists[id].head = s->links[id].next;
+  }
+  if (s->links[id].next) {
+    s->links[id].next->links[id].prev = s->links[id].prev;
+  } else {
+    t->lists[id].tail = s->links[id].prev;
+  }
+}
+
+static void stream_list_add_tail(grpc_chttp2_transport *t,
+                                 grpc_chttp2_stream *s,
+                                 grpc_chttp2_stream_list_id id) {
+  grpc_chttp2_stream *old_tail;
+  GPR_ASSERT(!s->included[id]);
+  old_tail = t->lists[id].tail;
+  s->links[id].next = NULL;
+  s->links[id].prev = old_tail;
+  if (old_tail) {
+    old_tail->links[id].next = s;
+  } else {
+    s->links[id].prev = NULL;
+    t->lists[id].head = s;
+  }
+  t->lists[id].tail = s;
+  s->included[id] = 1;
+}
+
+static void stream_list_join(grpc_chttp2_transport *t, grpc_chttp2_stream *s,
+                             grpc_chttp2_stream_list_id id) {
+  if (s->included[id]) {
+    return;
+  }
+  stream_list_add_tail(t, s, id);
+}
+