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/*
*
* 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.
*
*/
#include "src/core/ext/transport/chttp2/transport/internal.h"
#include <grpc/support/log.h>
#define TRANSPORT_FROM_GLOBAL(tg) \
((grpc_chttp2_transport *)((char *)(tg)-offsetof(grpc_chttp2_transport, \
global)))
#define STREAM_FROM_GLOBAL(sg) \
((grpc_chttp2_stream *)((char *)(sg)-offsetof(grpc_chttp2_stream, global)))
#define TRANSPORT_FROM_WRITING(tw) \
((grpc_chttp2_transport *)((char *)(tw)-offsetof(grpc_chttp2_transport, \
writing)))
#define STREAM_FROM_WRITING(sw) \
((grpc_chttp2_stream *)((char *)(sw)-offsetof(grpc_chttp2_stream, writing)))
#define TRANSPORT_FROM_PARSING(tp) \
((grpc_chttp2_transport *)((char *)(tp)-offsetof(grpc_chttp2_transport, \
parsing)))
#define STREAM_FROM_PARSING(sp) \
((grpc_chttp2_stream *)((char *)(sp)-offsetof(grpc_chttp2_stream, parsing)))
/* 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 int 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 = NULL;
} else {
t->lists[id].head = NULL;
t->lists[id].tail = NULL;
}
s->included[id] = 0;
}
*stream = s;
return s != 0;
}
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;
}
}
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 = NULL;
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;
}
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_global *transport_global,
grpc_chttp2_stream_global *stream_global) {
GPR_ASSERT(stream_global->id != 0);
return stream_list_add(TRANSPORT_FROM_GLOBAL(transport_global),
STREAM_FROM_GLOBAL(stream_global),
GRPC_CHTTP2_LIST_WRITABLE);
}
int grpc_chttp2_list_pop_writable_stream(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_transport_writing *transport_writing,
grpc_chttp2_stream_global **stream_global,
grpc_chttp2_stream_writing **stream_writing) {
grpc_chttp2_stream *stream;
int r = stream_list_pop(TRANSPORT_FROM_GLOBAL(transport_global), &stream,
GRPC_CHTTP2_LIST_WRITABLE);
if (r != 0) {
*stream_global = &stream->global;
*stream_writing = &stream->writing;
}
return r;
}
bool grpc_chttp2_list_remove_writable_stream(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_stream_global *stream_global) {
return stream_list_maybe_remove(TRANSPORT_FROM_GLOBAL(transport_global),
STREAM_FROM_GLOBAL(stream_global),
GRPC_CHTTP2_LIST_WRITABLE);
}
void grpc_chttp2_list_add_writing_stream(
grpc_chttp2_transport_writing *transport_writing,
grpc_chttp2_stream_writing *stream_writing) {
GPR_ASSERT(stream_list_add(TRANSPORT_FROM_WRITING(transport_writing),
STREAM_FROM_WRITING(stream_writing),
GRPC_CHTTP2_LIST_WRITING));
}
int grpc_chttp2_list_have_writing_streams(
grpc_chttp2_transport_writing *transport_writing) {
return !stream_list_empty(TRANSPORT_FROM_WRITING(transport_writing),
GRPC_CHTTP2_LIST_WRITING);
}
int grpc_chttp2_list_pop_writing_stream(
grpc_chttp2_transport_writing *transport_writing,
grpc_chttp2_stream_writing **stream_writing) {
grpc_chttp2_stream *stream;
int r = stream_list_pop(TRANSPORT_FROM_WRITING(transport_writing), &stream,
GRPC_CHTTP2_LIST_WRITING);
if (r != 0) {
*stream_writing = &stream->writing;
}
return r;
}
void grpc_chttp2_list_add_written_stream(
grpc_chttp2_transport_writing *transport_writing,
grpc_chttp2_stream_writing *stream_writing) {
stream_list_add(TRANSPORT_FROM_WRITING(transport_writing),
STREAM_FROM_WRITING(stream_writing),
GRPC_CHTTP2_LIST_WRITTEN);
}
int grpc_chttp2_list_pop_written_stream(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_transport_writing *transport_writing,
grpc_chttp2_stream_global **stream_global,
grpc_chttp2_stream_writing **stream_writing) {
grpc_chttp2_stream *stream;
int r = stream_list_pop(TRANSPORT_FROM_WRITING(transport_writing), &stream,
GRPC_CHTTP2_LIST_WRITTEN);
if (r != 0) {
*stream_global = &stream->global;
*stream_writing = &stream->writing;
}
return r;
}
void grpc_chttp2_list_add_unannounced_incoming_window_available(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_stream_global *stream_global) {
GPR_ASSERT(stream_global->id != 0);
stream_list_add(TRANSPORT_FROM_GLOBAL(transport_global),
STREAM_FROM_GLOBAL(stream_global),
GRPC_CHTTP2_LIST_UNANNOUNCED_INCOMING_WINDOW_AVAILABLE);
}
void grpc_chttp2_list_remove_unannounced_incoming_window_available(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_stream_global *stream_global) {
stream_list_maybe_remove(
TRANSPORT_FROM_GLOBAL(transport_global),
STREAM_FROM_GLOBAL(stream_global),
GRPC_CHTTP2_LIST_UNANNOUNCED_INCOMING_WINDOW_AVAILABLE);
}
int grpc_chttp2_list_pop_unannounced_incoming_window_available(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_transport_parsing *transport_parsing,
grpc_chttp2_stream_global **stream_global,
grpc_chttp2_stream_parsing **stream_parsing) {
grpc_chttp2_stream *stream;
int r =
stream_list_pop(TRANSPORT_FROM_GLOBAL(transport_global), &stream,
GRPC_CHTTP2_LIST_UNANNOUNCED_INCOMING_WINDOW_AVAILABLE);
if (r != 0) {
*stream_global = &stream->global;
*stream_parsing = &stream->parsing;
}
return r;
}
void grpc_chttp2_list_add_parsing_seen_stream(
grpc_chttp2_transport_parsing *transport_parsing,
grpc_chttp2_stream_parsing *stream_parsing) {
stream_list_add(TRANSPORT_FROM_PARSING(transport_parsing),
STREAM_FROM_PARSING(stream_parsing),
GRPC_CHTTP2_LIST_PARSING_SEEN);
}
int grpc_chttp2_list_pop_parsing_seen_stream(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_transport_parsing *transport_parsing,
grpc_chttp2_stream_global **stream_global,
grpc_chttp2_stream_parsing **stream_parsing) {
grpc_chttp2_stream *stream;
int r = stream_list_pop(TRANSPORT_FROM_PARSING(transport_parsing), &stream,
GRPC_CHTTP2_LIST_PARSING_SEEN);
if (r != 0) {
*stream_global = &stream->global;
*stream_parsing = &stream->parsing;
}
return r;
}
void grpc_chttp2_list_add_waiting_for_concurrency(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_stream_global *stream_global) {
stream_list_add(TRANSPORT_FROM_GLOBAL(transport_global),
STREAM_FROM_GLOBAL(stream_global),
GRPC_CHTTP2_LIST_WAITING_FOR_CONCURRENCY);
}
int grpc_chttp2_list_pop_waiting_for_concurrency(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_stream_global **stream_global) {
grpc_chttp2_stream *stream;
int r = stream_list_pop(TRANSPORT_FROM_GLOBAL(transport_global), &stream,
GRPC_CHTTP2_LIST_WAITING_FOR_CONCURRENCY);
if (r != 0) {
*stream_global = &stream->global;
}
return r;
}
void grpc_chttp2_list_add_check_read_ops(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_stream_global *stream_global) {
stream_list_add(TRANSPORT_FROM_GLOBAL(transport_global),
STREAM_FROM_GLOBAL(stream_global),
GRPC_CHTTP2_LIST_CHECK_READ_OPS);
}
int grpc_chttp2_list_pop_check_read_ops(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_stream_global **stream_global) {
grpc_chttp2_stream *stream;
int r = stream_list_pop(TRANSPORT_FROM_GLOBAL(transport_global), &stream,
GRPC_CHTTP2_LIST_CHECK_READ_OPS);
if (r != 0) {
*stream_global = &stream->global;
}
return r;
}
void grpc_chttp2_list_add_writing_stalled_by_transport(
grpc_chttp2_transport_writing *transport_writing,
grpc_chttp2_stream_writing *stream_writing) {
grpc_chttp2_stream *stream = STREAM_FROM_WRITING(stream_writing);
if (!stream->included[GRPC_CHTTP2_LIST_WRITING_STALLED_BY_TRANSPORT]) {
GRPC_CHTTP2_STREAM_REF(&stream->global, "chttp2_writing_stalled");
}
stream_list_add(TRANSPORT_FROM_WRITING(transport_writing), stream,
GRPC_CHTTP2_LIST_WRITING_STALLED_BY_TRANSPORT);
}
void grpc_chttp2_list_flush_writing_stalled_by_transport(
grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_writing *transport_writing,
bool is_window_available) {
grpc_chttp2_stream *stream;
grpc_chttp2_transport *transport = TRANSPORT_FROM_WRITING(transport_writing);
while (stream_list_pop(transport, &stream,
GRPC_CHTTP2_LIST_WRITING_STALLED_BY_TRANSPORT)) {
if (is_window_available) {
grpc_chttp2_become_writable(&transport->global, &stream->global);
} else {
grpc_chttp2_list_add_stalled_by_transport(transport_writing,
&stream->writing);
}
GRPC_CHTTP2_STREAM_UNREF(exec_ctx, &stream->global,
"chttp2_writing_stalled");
}
}
void grpc_chttp2_list_add_stalled_by_transport(
grpc_chttp2_transport_writing *transport_writing,
grpc_chttp2_stream_writing *stream_writing) {
stream_list_add(TRANSPORT_FROM_WRITING(transport_writing),
STREAM_FROM_WRITING(stream_writing),
GRPC_CHTTP2_LIST_STALLED_BY_TRANSPORT);
}
int grpc_chttp2_list_pop_stalled_by_transport(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_stream_global **stream_global) {
grpc_chttp2_stream *stream;
int r = stream_list_pop(TRANSPORT_FROM_GLOBAL(transport_global), &stream,
GRPC_CHTTP2_LIST_STALLED_BY_TRANSPORT);
if (r != 0) {
*stream_global = &stream->global;
}
return r;
}
void grpc_chttp2_list_remove_stalled_by_transport(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_stream_global *stream_global) {
stream_list_maybe_remove(TRANSPORT_FROM_GLOBAL(transport_global),
STREAM_FROM_GLOBAL(stream_global),
GRPC_CHTTP2_LIST_STALLED_BY_TRANSPORT);
}
void grpc_chttp2_list_add_closed_waiting_for_parsing(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_stream_global *stream_global) {
stream_list_add(TRANSPORT_FROM_GLOBAL(transport_global),
STREAM_FROM_GLOBAL(stream_global),
GRPC_CHTTP2_LIST_CLOSED_WAITING_FOR_PARSING);
}
int grpc_chttp2_list_pop_closed_waiting_for_parsing(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_stream_global **stream_global) {
grpc_chttp2_stream *stream;
int r = stream_list_pop(TRANSPORT_FROM_GLOBAL(transport_global), &stream,
GRPC_CHTTP2_LIST_CLOSED_WAITING_FOR_PARSING);
if (r != 0) {
*stream_global = &stream->global;
}
return r;
}
void grpc_chttp2_list_add_closed_waiting_for_writing(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_stream_global *stream_global) {
stream_list_add(TRANSPORT_FROM_GLOBAL(transport_global),
STREAM_FROM_GLOBAL(stream_global),
GRPC_CHTTP2_LIST_CLOSED_WAITING_FOR_WRITING);
}
int grpc_chttp2_list_pop_closed_waiting_for_writing(
grpc_chttp2_transport_global *transport_global,
grpc_chttp2_stream_global **stream_global) {
grpc_chttp2_stream *stream;
int r = stream_list_pop(TRANSPORT_FROM_GLOBAL(transport_global), &stream,
GRPC_CHTTP2_LIST_CLOSED_WAITING_FOR_WRITING);
if (r != 0) {
*stream_global = &stream->global;
}
return r;
}
void grpc_chttp2_register_stream(grpc_chttp2_transport *t,
grpc_chttp2_stream *s) {
stream_list_add_tail(t, s, GRPC_CHTTP2_LIST_ALL_STREAMS);
}
int grpc_chttp2_unregister_stream(grpc_chttp2_transport *t,
grpc_chttp2_stream *s) {
stream_list_maybe_remove(t, s, GRPC_CHTTP2_LIST_ALL_STREAMS);
return stream_list_empty(t, GRPC_CHTTP2_LIST_ALL_STREAMS);
}
int grpc_chttp2_has_streams(grpc_chttp2_transport *t) {
return !stream_list_empty(t, GRPC_CHTTP2_LIST_ALL_STREAMS);
}
void grpc_chttp2_for_all_streams(
grpc_chttp2_transport_global *transport_global, void *user_data,
void (*cb)(grpc_chttp2_transport_global *transport_global, void *user_data,
grpc_chttp2_stream_global *stream_global)) {
grpc_chttp2_stream *s;
grpc_chttp2_transport *t = TRANSPORT_FROM_GLOBAL(transport_global);
for (s = t->lists[GRPC_CHTTP2_LIST_ALL_STREAMS].head; s != NULL;
s = s->links[GRPC_CHTTP2_LIST_ALL_STREAMS].next) {
cb(transport_global, user_data, &s->global);
}
}
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