--- /dev/null
+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/ext/transport/chttp2/transport/internal.h"
+
+#include <grpc/support/log.h>
+
+static const char* stream_list_id_string(grpc_chttp2_stream_list_id id) {
+ switch (id) {
+ case GRPC_CHTTP2_LIST_WRITABLE:
+ return "writable";
+ case GRPC_CHTTP2_LIST_WRITING:
+ return "writing";
+ case GRPC_CHTTP2_LIST_STALLED_BY_TRANSPORT:
+ return "stalled_by_transport";
+ case GRPC_CHTTP2_LIST_STALLED_BY_STREAM:
+ return "stalled_by_stream";
+ case GRPC_CHTTP2_LIST_WAITING_FOR_CONCURRENCY:
+ return "waiting_for_concurrency";
+ case STREAM_LIST_COUNT:
+ GPR_UNREACHABLE_CODE(return "unknown");
+ }
+ GPR_UNREACHABLE_CODE(return "unknown");
+}
+
+grpc_core::TraceFlag grpc_trace_http2_stream_state(false, "http2_stream_state");
+
+/* core list management */
+
+static bool stream_list_empty(grpc_chttp2_transport* t,
+ grpc_chttp2_stream_list_id id) {
+ return t->lists[id].head == nullptr;
+}
+
+static bool stream_list_pop(grpc_chttp2_transport* t,
+ grpc_chttp2_stream** stream,
+ 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 = nullptr;
+ } else {
+ t->lists[id].head = nullptr;
+ t->lists[id].tail = nullptr;
+ }
+ s->included[id] = 0;
+ }
+ *stream = s;
+ if (s && GRPC_TRACE_FLAG_ENABLED(grpc_trace_http2_stream_state)) {
+ gpr_log(GPR_INFO, "%p[%d][%s]: pop from %s", t, s->id,
+ t->is_client ? "cli" : "svr", stream_list_id_string(id));
+ }
+ return s != nullptr;
+}
+
+static void stream_list_remove(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+ grpc_chttp2_stream_list_id id) {
+ GPR_ASSERT(s->included[id]);
+ 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;
+ }
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_trace_http2_stream_state)) {
+ gpr_log(GPR_INFO, "%p[%d][%s]: remove from %s", t, s->id,
+ t->is_client ? "cli" : "svr", stream_list_id_string(id));
+ }
+}
+
+static bool stream_list_maybe_remove(grpc_chttp2_transport* t,
+ grpc_chttp2_stream* s,
+ grpc_chttp2_stream_list_id id) {
+ if (s->included[id]) {
+ stream_list_remove(t, s, id);
+ return true;
+ } else {
+ return false;
+ }
+}
+
+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 = nullptr;
+ s->links[id].prev = old_tail;
+ if (old_tail) {
+ old_tail->links[id].next = s;
+ } else {
+ t->lists[id].head = s;
+ }
+ t->lists[id].tail = s;
+ s->included[id] = 1;
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_trace_http2_stream_state)) {
+ gpr_log(GPR_INFO, "%p[%d][%s]: add to %s", t, s->id,
+ t->is_client ? "cli" : "svr", stream_list_id_string(id));
+ }
+}
+
+static bool stream_list_add(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+ grpc_chttp2_stream_list_id id) {
+ if (s->included[id]) {
+ return false;
+ }
+ stream_list_add_tail(t, s, id);
+ return true;
+}
+
+/* wrappers for specializations */
+
+bool grpc_chttp2_list_add_writable_stream(grpc_chttp2_transport* t,
+ grpc_chttp2_stream* s) {
+ GPR_ASSERT(s->id != 0);
+ return stream_list_add(t, s, GRPC_CHTTP2_LIST_WRITABLE);
+}
+
+bool grpc_chttp2_list_pop_writable_stream(grpc_chttp2_transport* t,
+ grpc_chttp2_stream** s) {
+ return stream_list_pop(t, s, GRPC_CHTTP2_LIST_WRITABLE);
+}
+
+bool grpc_chttp2_list_remove_writable_stream(grpc_chttp2_transport* t,
+ grpc_chttp2_stream* s) {
+ return stream_list_maybe_remove(t, s, GRPC_CHTTP2_LIST_WRITABLE);
+}
+
+bool grpc_chttp2_list_add_writing_stream(grpc_chttp2_transport* t,
+ grpc_chttp2_stream* s) {
+ return stream_list_add(t, s, GRPC_CHTTP2_LIST_WRITING);
+}
+
+bool grpc_chttp2_list_have_writing_streams(grpc_chttp2_transport* t) {
+ return !stream_list_empty(t, GRPC_CHTTP2_LIST_WRITING);
+}
+
+bool grpc_chttp2_list_pop_writing_stream(grpc_chttp2_transport* t,
+ grpc_chttp2_stream** s) {
+ return stream_list_pop(t, s, GRPC_CHTTP2_LIST_WRITING);
+}
+
+void grpc_chttp2_list_add_waiting_for_concurrency(grpc_chttp2_transport* t,
+ grpc_chttp2_stream* s) {
+ stream_list_add(t, s, GRPC_CHTTP2_LIST_WAITING_FOR_CONCURRENCY);
+}
+
+bool grpc_chttp2_list_pop_waiting_for_concurrency(grpc_chttp2_transport* t,
+ grpc_chttp2_stream** s) {
+ return stream_list_pop(t, s, GRPC_CHTTP2_LIST_WAITING_FOR_CONCURRENCY);
+}
+
+void grpc_chttp2_list_remove_waiting_for_concurrency(grpc_chttp2_transport* t,
+ grpc_chttp2_stream* s) {
+ stream_list_maybe_remove(t, s, GRPC_CHTTP2_LIST_WAITING_FOR_CONCURRENCY);
+}
+
+void grpc_chttp2_list_add_stalled_by_transport(grpc_chttp2_transport* t,
+ grpc_chttp2_stream* s) {
+ GPR_ASSERT(t->flow_control->flow_control_enabled());
+ stream_list_add(t, s, GRPC_CHTTP2_LIST_STALLED_BY_TRANSPORT);
+}
+
+bool grpc_chttp2_list_pop_stalled_by_transport(grpc_chttp2_transport* t,
+ grpc_chttp2_stream** s) {
+ return stream_list_pop(t, s, GRPC_CHTTP2_LIST_STALLED_BY_TRANSPORT);
+}
+
+void grpc_chttp2_list_remove_stalled_by_transport(grpc_chttp2_transport* t,
+ grpc_chttp2_stream* s) {
+ stream_list_maybe_remove(t, s, GRPC_CHTTP2_LIST_STALLED_BY_TRANSPORT);
+}
+
+void grpc_chttp2_list_add_stalled_by_stream(grpc_chttp2_transport* t,
+ grpc_chttp2_stream* s) {
+ GPR_ASSERT(t->flow_control->flow_control_enabled());
+ stream_list_add(t, s, GRPC_CHTTP2_LIST_STALLED_BY_STREAM);
+}
+
+bool grpc_chttp2_list_pop_stalled_by_stream(grpc_chttp2_transport* t,
+ grpc_chttp2_stream** s) {
+ return stream_list_pop(t, s, GRPC_CHTTP2_LIST_STALLED_BY_STREAM);
+}
+
+bool grpc_chttp2_list_remove_stalled_by_stream(grpc_chttp2_transport* t,
+ grpc_chttp2_stream* s) {
+ return stream_list_maybe_remove(t, s, GRPC_CHTTP2_LIST_STALLED_BY_STREAM);
+}
git://repos.xcallymotion.com / motion2.git / blobdiff