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Diffstat (limited to 'deps/node/deps/nghttp2/lib/nghttp2_stream.c')
-rw-r--r--deps/node/deps/nghttp2/lib/nghttp2_stream.c1004
1 files changed, 0 insertions, 1004 deletions
diff --git a/deps/node/deps/nghttp2/lib/nghttp2_stream.c b/deps/node/deps/nghttp2/lib/nghttp2_stream.c
deleted file mode 100644
index eccd3174..00000000
--- a/deps/node/deps/nghttp2/lib/nghttp2_stream.c
+++ /dev/null
@@ -1,1004 +0,0 @@
-/*
- * nghttp2 - HTTP/2 C Library
- *
- * Copyright (c) 2012 Tatsuhiro Tsujikawa
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-#include "nghttp2_stream.h"
-
-#include <assert.h>
-#include <stdio.h>
-
-#include "nghttp2_session.h"
-#include "nghttp2_helper.h"
-#include "nghttp2_debug.h"
-
-/* Maximum distance between any two stream's cycle in the same
- prirority queue. Imagine stream A's cycle is A, and stream B's
- cycle is B, and A < B. The cycle is unsigned 32 bit integer, it
- may get overflow. Because of how we calculate the next cycle
- value, if B - A is less than or equals to
- NGHTTP2_MAX_CYCLE_DISTANCE, A and B are in the same scale, in other
- words, B is really greater than or equal to A. Otherwise, A is a
- result of overflow, and it is actually A > B if we consider that
- fact. */
-#define NGHTTP2_MAX_CYCLE_DISTANCE (16384 * 256 + 255)
-
-static int stream_less(const void *lhsx, const void *rhsx) {
- const nghttp2_stream *lhs, *rhs;
-
- lhs = nghttp2_struct_of(lhsx, nghttp2_stream, pq_entry);
- rhs = nghttp2_struct_of(rhsx, nghttp2_stream, pq_entry);
-
- if (lhs->cycle == rhs->cycle) {
- return lhs->seq < rhs->seq;
- }
-
- if (lhs->cycle < rhs->cycle) {
- return rhs->cycle - lhs->cycle <= NGHTTP2_MAX_CYCLE_DISTANCE;
- }
-
- return lhs->cycle - rhs->cycle > NGHTTP2_MAX_CYCLE_DISTANCE;
-}
-
-void nghttp2_stream_init(nghttp2_stream *stream, int32_t stream_id,
- uint8_t flags, nghttp2_stream_state initial_state,
- int32_t weight, int32_t remote_initial_window_size,
- int32_t local_initial_window_size,
- void *stream_user_data, nghttp2_mem *mem) {
- nghttp2_map_entry_init(&stream->map_entry, (key_type)stream_id);
- nghttp2_pq_init(&stream->obq, stream_less, mem);
-
- stream->stream_id = stream_id;
- stream->flags = flags;
- stream->state = initial_state;
- stream->shut_flags = NGHTTP2_SHUT_NONE;
- stream->stream_user_data = stream_user_data;
- stream->item = NULL;
- stream->remote_window_size = remote_initial_window_size;
- stream->local_window_size = local_initial_window_size;
- stream->recv_window_size = 0;
- stream->consumed_size = 0;
- stream->recv_reduction = 0;
- stream->window_update_queued = 0;
-
- stream->dep_prev = NULL;
- stream->dep_next = NULL;
- stream->sib_prev = NULL;
- stream->sib_next = NULL;
-
- stream->closed_prev = NULL;
- stream->closed_next = NULL;
-
- stream->weight = weight;
- stream->sum_dep_weight = 0;
-
- stream->http_flags = NGHTTP2_HTTP_FLAG_NONE;
- stream->content_length = -1;
- stream->recv_content_length = 0;
- stream->status_code = -1;
-
- stream->queued = 0;
- stream->descendant_last_cycle = 0;
- stream->cycle = 0;
- stream->pending_penalty = 0;
- stream->descendant_next_seq = 0;
- stream->seq = 0;
- stream->last_writelen = 0;
-}
-
-void nghttp2_stream_free(nghttp2_stream *stream) {
- nghttp2_pq_free(&stream->obq);
- /* We don't free stream->item. If it is assigned to aob, then
- active_outbound_item_reset() will delete it. Otherwise,
- nghttp2_stream_close() or session_del() will delete it. */
-}
-
-void nghttp2_stream_shutdown(nghttp2_stream *stream, nghttp2_shut_flag flag) {
- stream->shut_flags = (uint8_t)(stream->shut_flags | flag);
-}
-
-/*
- * Returns nonzero if |stream| is active. This function does not take
- * into account its descendants.
- */
-static int stream_active(nghttp2_stream *stream) {
- return stream->item &&
- (stream->flags & NGHTTP2_STREAM_FLAG_DEFERRED_ALL) == 0;
-}
-
-/*
- * Returns nonzero if |stream| or one of its descendants is active
- */
-static int stream_subtree_active(nghttp2_stream *stream) {
- return stream_active(stream) || !nghttp2_pq_empty(&stream->obq);
-}
-
-/*
- * Returns next cycle for |stream|.
- */
-static void stream_next_cycle(nghttp2_stream *stream, uint32_t last_cycle) {
- uint32_t penalty;
-
- penalty = (uint32_t)stream->last_writelen * NGHTTP2_MAX_WEIGHT +
- stream->pending_penalty;
-
- stream->cycle = last_cycle + penalty / (uint32_t)stream->weight;
- stream->pending_penalty = penalty % (uint32_t)stream->weight;
-}
-
-static int stream_obq_push(nghttp2_stream *dep_stream, nghttp2_stream *stream) {
- int rv;
-
- for (; dep_stream && !stream->queued;
- stream = dep_stream, dep_stream = dep_stream->dep_prev) {
- stream_next_cycle(stream, dep_stream->descendant_last_cycle);
- stream->seq = dep_stream->descendant_next_seq++;
-
- DEBUGF("stream: stream=%d obq push cycle=%d\n", stream->stream_id,
- stream->cycle);
-
- DEBUGF("stream: push stream %d to stream %d\n", stream->stream_id,
- dep_stream->stream_id);
-
- rv = nghttp2_pq_push(&dep_stream->obq, &stream->pq_entry);
- if (rv != 0) {
- return rv;
- }
- stream->queued = 1;
- }
-
- return 0;
-}
-
-/*
- * Removes |stream| from parent's obq. If removal of |stream| makes
- * parent's obq empty, and parent is not active, then parent is also
- * removed. This process is repeated recursively.
- */
-static void stream_obq_remove(nghttp2_stream *stream) {
- nghttp2_stream *dep_stream;
-
- dep_stream = stream->dep_prev;
-
- if (!stream->queued) {
- return;
- }
-
- for (; dep_stream; stream = dep_stream, dep_stream = dep_stream->dep_prev) {
- DEBUGF("stream: remove stream %d from stream %d\n", stream->stream_id,
- dep_stream->stream_id);
-
- nghttp2_pq_remove(&dep_stream->obq, &stream->pq_entry);
-
- assert(stream->queued);
-
- stream->queued = 0;
- stream->cycle = 0;
- stream->pending_penalty = 0;
- stream->descendant_last_cycle = 0;
- stream->last_writelen = 0;
-
- if (stream_subtree_active(dep_stream)) {
- return;
- }
- }
-}
-
-/*
- * Moves |stream| from |src|'s obq to |dest|'s obq. Removal from
- * |src|'s obq is just done calling nghttp2_pq_remove(), so it does
- * not recursively remove |src| and ancestors, like
- * stream_obq_remove().
- */
-static int stream_obq_move(nghttp2_stream *dest, nghttp2_stream *src,
- nghttp2_stream *stream) {
- if (!stream->queued) {
- return 0;
- }
-
- DEBUGF("stream: remove stream %d from stream %d (move)\n", stream->stream_id,
- src->stream_id);
-
- nghttp2_pq_remove(&src->obq, &stream->pq_entry);
- stream->queued = 0;
-
- return stream_obq_push(dest, stream);
-}
-
-void nghttp2_stream_reschedule(nghttp2_stream *stream) {
- nghttp2_stream *dep_stream;
-
- assert(stream->queued);
-
- dep_stream = stream->dep_prev;
-
- for (; dep_stream; stream = dep_stream, dep_stream = dep_stream->dep_prev) {
- nghttp2_pq_remove(&dep_stream->obq, &stream->pq_entry);
-
- stream_next_cycle(stream, dep_stream->descendant_last_cycle);
- stream->seq = dep_stream->descendant_next_seq++;
-
- nghttp2_pq_push(&dep_stream->obq, &stream->pq_entry);
-
- DEBUGF("stream: stream=%d obq resched cycle=%d\n", stream->stream_id,
- stream->cycle);
-
- dep_stream->last_writelen = stream->last_writelen;
- }
-}
-
-void nghttp2_stream_change_weight(nghttp2_stream *stream, int32_t weight) {
- nghttp2_stream *dep_stream;
- uint32_t last_cycle;
- int32_t old_weight;
- uint32_t wlen_penalty;
-
- if (stream->weight == weight) {
- return;
- }
-
- old_weight = stream->weight;
- stream->weight = weight;
-
- dep_stream = stream->dep_prev;
-
- if (!dep_stream) {
- return;
- }
-
- dep_stream->sum_dep_weight += weight - old_weight;
-
- if (!stream->queued) {
- return;
- }
-
- nghttp2_pq_remove(&dep_stream->obq, &stream->pq_entry);
-
- wlen_penalty = (uint32_t)stream->last_writelen * NGHTTP2_MAX_WEIGHT;
-
- /* Compute old stream->pending_penalty we used to calculate
- stream->cycle */
- stream->pending_penalty =
- (uint32_t)((stream->pending_penalty + (uint32_t)old_weight -
- (wlen_penalty % (uint32_t)old_weight)) %
- (uint32_t)old_weight);
-
- last_cycle = stream->cycle -
- (wlen_penalty + stream->pending_penalty) / (uint32_t)old_weight;
-
- /* Now we have old stream->pending_penalty and new stream->weight in
- place */
- stream_next_cycle(stream, last_cycle);
-
- if (stream->cycle < dep_stream->descendant_last_cycle &&
- (dep_stream->descendant_last_cycle - stream->cycle) <=
- NGHTTP2_MAX_CYCLE_DISTANCE) {
- stream->cycle = dep_stream->descendant_last_cycle;
- }
-
- /* Continue to use same stream->seq */
-
- nghttp2_pq_push(&dep_stream->obq, &stream->pq_entry);
-
- DEBUGF("stream: stream=%d obq resched cycle=%d\n", stream->stream_id,
- stream->cycle);
-}
-
-static nghttp2_stream *stream_last_sib(nghttp2_stream *stream) {
- for (; stream->sib_next; stream = stream->sib_next)
- ;
-
- return stream;
-}
-
-int32_t nghttp2_stream_dep_distributed_weight(nghttp2_stream *stream,
- int32_t weight) {
- weight = stream->weight * weight / stream->sum_dep_weight;
-
- return nghttp2_max(1, weight);
-}
-
-#ifdef STREAM_DEP_DEBUG
-
-static void ensure_inactive(nghttp2_stream *stream) {
- nghttp2_stream *si;
-
- if (stream->queued) {
- fprintf(stderr, "stream(%p)=%d, stream->queued = 1; want 0\n", stream,
- stream->stream_id);
- assert(0);
- }
-
- if (stream_active(stream)) {
- fprintf(stderr, "stream(%p)=%d, stream_active(stream) = 1; want 0\n",
- stream, stream->stream_id);
- assert(0);
- }
-
- if (!nghttp2_pq_empty(&stream->obq)) {
- fprintf(stderr, "stream(%p)=%d, nghttp2_pq_size() = %zu; want 0\n", stream,
- stream->stream_id, nghttp2_pq_size(&stream->obq));
- assert(0);
- }
-
- for (si = stream->dep_next; si; si = si->sib_next) {
- ensure_inactive(si);
- }
-}
-
-static void check_queued(nghttp2_stream *stream) {
- nghttp2_stream *si;
- int queued;
-
- if (stream->queued) {
- if (!stream_subtree_active(stream)) {
- fprintf(stderr,
- "stream(%p)=%d, stream->queued == 1, but "
- "stream_active() == %d and nghttp2_pq_size(&stream->obq) = %zu\n",
- stream, stream->stream_id, stream_active(stream),
- nghttp2_pq_size(&stream->obq));
- assert(0);
- }
- if (!stream_active(stream)) {
- queued = 0;
- for (si = stream->dep_next; si; si = si->sib_next) {
- if (si->queued) {
- ++queued;
- }
- }
- if (queued == 0) {
- fprintf(stderr,
- "stream(%p)=%d, stream->queued == 1, and "
- "!stream_active(), but no descendants is queued\n",
- stream, stream->stream_id);
- assert(0);
- }
- }
-
- for (si = stream->dep_next; si; si = si->sib_next) {
- check_queued(si);
- }
- } else {
- if (stream_active(stream) || !nghttp2_pq_empty(&stream->obq)) {
- fprintf(stderr,
- "stream(%p) = %d, stream->queued == 0, but "
- "stream_active(stream) == %d and "
- "nghttp2_pq_size(&stream->obq) = %zu\n",
- stream, stream->stream_id, stream_active(stream),
- nghttp2_pq_size(&stream->obq));
- assert(0);
- }
- for (si = stream->dep_next; si; si = si->sib_next) {
- ensure_inactive(si);
- }
- }
-}
-
-static void check_sum_dep(nghttp2_stream *stream) {
- nghttp2_stream *si;
- int32_t n = 0;
- for (si = stream->dep_next; si; si = si->sib_next) {
- n += si->weight;
- }
- if (n != stream->sum_dep_weight) {
- fprintf(stderr, "stream(%p)=%d, sum_dep_weight = %d; want %d\n", stream,
- stream->stream_id, n, stream->sum_dep_weight);
- assert(0);
- }
- for (si = stream->dep_next; si; si = si->sib_next) {
- check_sum_dep(si);
- }
-}
-
-static void check_dep_prev(nghttp2_stream *stream) {
- nghttp2_stream *si;
- for (si = stream->dep_next; si; si = si->sib_next) {
- if (si->dep_prev != stream) {
- fprintf(stderr, "si->dep_prev = %p; want %p\n", si->dep_prev, stream);
- assert(0);
- }
- check_dep_prev(si);
- }
-}
-
-#endif /* STREAM_DEP_DEBUG */
-
-#ifdef STREAM_DEP_DEBUG
-static void validate_tree(nghttp2_stream *stream) {
- nghttp2_stream *si;
-
- if (!stream) {
- return;
- }
-
- for (; stream->dep_prev; stream = stream->dep_prev)
- ;
-
- assert(stream->stream_id == 0);
- assert(!stream->queued);
-
- fprintf(stderr, "checking...\n");
- if (nghttp2_pq_empty(&stream->obq)) {
- fprintf(stderr, "root obq empty\n");
- for (si = stream->dep_next; si; si = si->sib_next) {
- ensure_inactive(si);
- }
- } else {
- for (si = stream->dep_next; si; si = si->sib_next) {
- check_queued(si);
- }
- }
-
- check_sum_dep(stream);
- check_dep_prev(stream);
-}
-#else /* !STREAM_DEP_DEBUG */
-static void validate_tree(nghttp2_stream *stream) { (void)stream; }
-#endif /* !STREAM_DEP_DEBUG*/
-
-static int stream_update_dep_on_attach_item(nghttp2_stream *stream) {
- int rv;
-
- rv = stream_obq_push(stream->dep_prev, stream);
- if (rv != 0) {
- return rv;
- }
-
- validate_tree(stream);
- return 0;
-}
-
-static int stream_update_dep_on_detach_item(nghttp2_stream *stream) {
- if (nghttp2_pq_empty(&stream->obq)) {
- stream_obq_remove(stream);
- }
-
- validate_tree(stream);
-
- return 0;
-}
-
-int nghttp2_stream_attach_item(nghttp2_stream *stream,
- nghttp2_outbound_item *item) {
- int rv;
-
- assert((stream->flags & NGHTTP2_STREAM_FLAG_DEFERRED_ALL) == 0);
- assert(stream->item == NULL);
-
- DEBUGF("stream: stream=%d attach item=%p\n", stream->stream_id, item);
-
- stream->item = item;
-
- rv = stream_update_dep_on_attach_item(stream);
- if (rv != 0) {
- /* This may relave stream->queued == 1, but stream->item == NULL.
- But only consequence of this error is fatal one, and session
- destruction. In that execution path, these inconsistency does
- not matter. */
- stream->item = NULL;
- return rv;
- }
-
- return 0;
-}
-
-int nghttp2_stream_detach_item(nghttp2_stream *stream) {
- DEBUGF("stream: stream=%d detach item=%p\n", stream->stream_id, stream->item);
-
- stream->item = NULL;
- stream->flags = (uint8_t)(stream->flags & ~NGHTTP2_STREAM_FLAG_DEFERRED_ALL);
-
- return stream_update_dep_on_detach_item(stream);
-}
-
-int nghttp2_stream_defer_item(nghttp2_stream *stream, uint8_t flags) {
- assert(stream->item);
-
- DEBUGF("stream: stream=%d defer item=%p cause=%02x\n", stream->stream_id,
- stream->item, flags);
-
- stream->flags |= flags;
-
- return stream_update_dep_on_detach_item(stream);
-}
-
-int nghttp2_stream_resume_deferred_item(nghttp2_stream *stream, uint8_t flags) {
- assert(stream->item);
-
- DEBUGF("stream: stream=%d resume item=%p flags=%02x\n", stream->stream_id,
- stream->item, flags);
-
- stream->flags = (uint8_t)(stream->flags & ~flags);
-
- if (stream->flags & NGHTTP2_STREAM_FLAG_DEFERRED_ALL) {
- return 0;
- }
-
- return stream_update_dep_on_attach_item(stream);
-}
-
-int nghttp2_stream_check_deferred_item(nghttp2_stream *stream) {
- return stream->item && (stream->flags & NGHTTP2_STREAM_FLAG_DEFERRED_ALL);
-}
-
-int nghttp2_stream_check_deferred_by_flow_control(nghttp2_stream *stream) {
- return stream->item &&
- (stream->flags & NGHTTP2_STREAM_FLAG_DEFERRED_FLOW_CONTROL);
-}
-
-static int update_initial_window_size(int32_t *window_size_ptr,
- int32_t new_initial_window_size,
- int32_t old_initial_window_size) {
- int64_t new_window_size = (int64_t)(*window_size_ptr) +
- new_initial_window_size - old_initial_window_size;
- if (INT32_MIN > new_window_size ||
- new_window_size > NGHTTP2_MAX_WINDOW_SIZE) {
- return -1;
- }
- *window_size_ptr = (int32_t)new_window_size;
- return 0;
-}
-
-int nghttp2_stream_update_remote_initial_window_size(
- nghttp2_stream *stream, int32_t new_initial_window_size,
- int32_t old_initial_window_size) {
- return update_initial_window_size(&stream->remote_window_size,
- new_initial_window_size,
- old_initial_window_size);
-}
-
-int nghttp2_stream_update_local_initial_window_size(
- nghttp2_stream *stream, int32_t new_initial_window_size,
- int32_t old_initial_window_size) {
- return update_initial_window_size(&stream->local_window_size,
- new_initial_window_size,
- old_initial_window_size);
-}
-
-void nghttp2_stream_promise_fulfilled(nghttp2_stream *stream) {
- stream->state = NGHTTP2_STREAM_OPENED;
- stream->flags = (uint8_t)(stream->flags & ~NGHTTP2_STREAM_FLAG_PUSH);
-}
-
-int nghttp2_stream_dep_find_ancestor(nghttp2_stream *stream,
- nghttp2_stream *target) {
- for (; stream; stream = stream->dep_prev) {
- if (stream == target) {
- return 1;
- }
- }
- return 0;
-}
-
-int nghttp2_stream_dep_insert(nghttp2_stream *dep_stream,
- nghttp2_stream *stream) {
- nghttp2_stream *si;
- int rv;
-
- DEBUGF("stream: dep_insert dep_stream(%p)=%d, stream(%p)=%d\n", dep_stream,
- dep_stream->stream_id, stream, stream->stream_id);
-
- stream->sum_dep_weight = dep_stream->sum_dep_weight;
- dep_stream->sum_dep_weight = stream->weight;
-
- if (dep_stream->dep_next) {
- for (si = dep_stream->dep_next; si; si = si->sib_next) {
- si->dep_prev = stream;
- if (si->queued) {
- rv = stream_obq_move(stream, dep_stream, si);
- if (rv != 0) {
- return rv;
- }
- }
- }
-
- if (stream_subtree_active(stream)) {
- rv = stream_obq_push(dep_stream, stream);
- if (rv != 0) {
- return rv;
- }
- }
-
- stream->dep_next = dep_stream->dep_next;
- }
-
- dep_stream->dep_next = stream;
- stream->dep_prev = dep_stream;
-
- validate_tree(stream);
-
- return 0;
-}
-
-static void set_dep_prev(nghttp2_stream *stream, nghttp2_stream *dep) {
- for (; stream; stream = stream->sib_next) {
- stream->dep_prev = dep;
- }
-}
-
-static void link_dep(nghttp2_stream *dep_stream, nghttp2_stream *stream) {
- dep_stream->dep_next = stream;
- if (stream) {
- stream->dep_prev = dep_stream;
- }
-}
-
-static void link_sib(nghttp2_stream *a, nghttp2_stream *b) {
- a->sib_next = b;
- if (b) {
- b->sib_prev = a;
- }
-}
-
-static void insert_link_dep(nghttp2_stream *dep_stream,
- nghttp2_stream *stream) {
- nghttp2_stream *sib_next;
-
- assert(stream->sib_prev == NULL);
-
- sib_next = dep_stream->dep_next;
-
- link_sib(stream, sib_next);
-
- link_dep(dep_stream, stream);
-}
-
-static void unlink_sib(nghttp2_stream *stream) {
- nghttp2_stream *prev, *next, *dep_next;
-
- prev = stream->sib_prev;
- dep_next = stream->dep_next;
-
- assert(prev);
-
- if (dep_next) {
- /*
- * prev--stream(--sib_next--...)
- * |
- * dep_next
- */
-
- link_sib(prev, dep_next);
-
- set_dep_prev(dep_next, stream->dep_prev);
-
- if (stream->sib_next) {
- link_sib(stream_last_sib(dep_next), stream->sib_next);
- }
- } else {
- /*
- * prev--stream(--sib_next--...)
- */
- next = stream->sib_next;
-
- prev->sib_next = next;
-
- if (next) {
- next->sib_prev = prev;
- }
- }
-}
-
-static void unlink_dep(nghttp2_stream *stream) {
- nghttp2_stream *prev, *next, *dep_next;
-
- prev = stream->dep_prev;
- dep_next = stream->dep_next;
-
- assert(prev);
-
- if (dep_next) {
- /*
- * prev
- * |
- * stream(--sib_next--...)
- * |
- * dep_next
- */
- link_dep(prev, dep_next);
-
- set_dep_prev(dep_next, stream->dep_prev);
-
- if (stream->sib_next) {
- link_sib(stream_last_sib(dep_next), stream->sib_next);
- }
-
- } else if (stream->sib_next) {
- /*
- * prev
- * |
- * stream--sib_next
- */
- next = stream->sib_next;
-
- next->sib_prev = NULL;
-
- link_dep(prev, next);
- } else {
- prev->dep_next = NULL;
- }
-}
-
-void nghttp2_stream_dep_add(nghttp2_stream *dep_stream,
- nghttp2_stream *stream) {
- DEBUGF("stream: dep_add dep_stream(%p)=%d, stream(%p)=%d\n", dep_stream,
- dep_stream->stream_id, stream, stream->stream_id);
-
- dep_stream->sum_dep_weight += stream->weight;
-
- if (dep_stream->dep_next == NULL) {
- link_dep(dep_stream, stream);
- } else {
- insert_link_dep(dep_stream, stream);
- }
-
- validate_tree(stream);
-}
-
-int nghttp2_stream_dep_remove(nghttp2_stream *stream) {
- nghttp2_stream *dep_prev, *si;
- int32_t sum_dep_weight_delta;
- int rv;
-
- DEBUGF("stream: dep_remove stream(%p)=%d\n", stream, stream->stream_id);
-
- /* Distribute weight of |stream| to direct descendants */
- sum_dep_weight_delta = -stream->weight;
-
- for (si = stream->dep_next; si; si = si->sib_next) {
- si->weight = nghttp2_stream_dep_distributed_weight(stream, si->weight);
-
- sum_dep_weight_delta += si->weight;
-
- if (si->queued) {
- rv = stream_obq_move(stream->dep_prev, stream, si);
- if (rv != 0) {
- return rv;
- }
- }
- }
-
- assert(stream->dep_prev);
-
- dep_prev = stream->dep_prev;
-
- dep_prev->sum_dep_weight += sum_dep_weight_delta;
-
- if (stream->queued) {
- stream_obq_remove(stream);
- }
-
- if (stream->sib_prev) {
- unlink_sib(stream);
- } else {
- unlink_dep(stream);
- }
-
- stream->sum_dep_weight = 0;
-
- stream->dep_prev = NULL;
- stream->dep_next = NULL;
- stream->sib_prev = NULL;
- stream->sib_next = NULL;
-
- validate_tree(dep_prev);
-
- return 0;
-}
-
-int nghttp2_stream_dep_insert_subtree(nghttp2_stream *dep_stream,
- nghttp2_stream *stream) {
- nghttp2_stream *last_sib;
- nghttp2_stream *dep_next;
- nghttp2_stream *si;
- int rv;
-
- DEBUGF("stream: dep_insert_subtree dep_stream(%p)=%d stream(%p)=%d\n",
- dep_stream, dep_stream->stream_id, stream, stream->stream_id);
-
- stream->sum_dep_weight += dep_stream->sum_dep_weight;
- dep_stream->sum_dep_weight = stream->weight;
-
- if (dep_stream->dep_next) {
- dep_next = dep_stream->dep_next;
-
- link_dep(dep_stream, stream);
-
- if (stream->dep_next) {
- last_sib = stream_last_sib(stream->dep_next);
-
- link_sib(last_sib, dep_next);
- } else {
- link_dep(stream, dep_next);
- }
-
- for (si = dep_next; si; si = si->sib_next) {
- si->dep_prev = stream;
- if (si->queued) {
- rv = stream_obq_move(stream, dep_stream, si);
- if (rv != 0) {
- return rv;
- }
- }
- }
- } else {
- link_dep(dep_stream, stream);
- }
-
- if (stream_subtree_active(stream)) {
- rv = stream_obq_push(dep_stream, stream);
- if (rv != 0) {
- return rv;
- }
- }
-
- validate_tree(dep_stream);
-
- return 0;
-}
-
-int nghttp2_stream_dep_add_subtree(nghttp2_stream *dep_stream,
- nghttp2_stream *stream) {
- int rv;
-
- DEBUGF("stream: dep_add_subtree dep_stream(%p)=%d stream(%p)=%d\n",
- dep_stream, dep_stream->stream_id, stream, stream->stream_id);
-
- dep_stream->sum_dep_weight += stream->weight;
-
- if (dep_stream->dep_next) {
- insert_link_dep(dep_stream, stream);
- } else {
- link_dep(dep_stream, stream);
- }
-
- if (stream_subtree_active(stream)) {
- rv = stream_obq_push(dep_stream, stream);
- if (rv != 0) {
- return rv;
- }
- }
-
- validate_tree(dep_stream);
-
- return 0;
-}
-
-void nghttp2_stream_dep_remove_subtree(nghttp2_stream *stream) {
- nghttp2_stream *next, *dep_prev;
-
- DEBUGF("stream: dep_remove_subtree stream(%p)=%d\n", stream,
- stream->stream_id);
-
- assert(stream->dep_prev);
-
- dep_prev = stream->dep_prev;
-
- if (stream->sib_prev) {
- link_sib(stream->sib_prev, stream->sib_next);
- } else {
- next = stream->sib_next;
-
- link_dep(dep_prev, next);
-
- if (next) {
- next->sib_prev = NULL;
- }
- }
-
- dep_prev->sum_dep_weight -= stream->weight;
-
- if (stream->queued) {
- stream_obq_remove(stream);
- }
-
- validate_tree(dep_prev);
-
- stream->sib_prev = NULL;
- stream->sib_next = NULL;
- stream->dep_prev = NULL;
-}
-
-int nghttp2_stream_in_dep_tree(nghttp2_stream *stream) {
- return stream->dep_prev || stream->dep_next || stream->sib_prev ||
- stream->sib_next;
-}
-
-nghttp2_outbound_item *
-nghttp2_stream_next_outbound_item(nghttp2_stream *stream) {
- nghttp2_pq_entry *ent;
- nghttp2_stream *si;
-
- for (;;) {
- if (stream_active(stream)) {
- /* Update ascendant's descendant_last_cycle here, so that we can
- assure that new stream is scheduled based on it. */
- for (si = stream; si->dep_prev; si = si->dep_prev) {
- si->dep_prev->descendant_last_cycle = si->cycle;
- }
- return stream->item;
- }
- ent = nghttp2_pq_top(&stream->obq);
- if (!ent) {
- return NULL;
- }
- stream = nghttp2_struct_of(ent, nghttp2_stream, pq_entry);
- }
-}
-
-nghttp2_stream_proto_state nghttp2_stream_get_state(nghttp2_stream *stream) {
- if (stream->flags & NGHTTP2_STREAM_FLAG_CLOSED) {
- return NGHTTP2_STREAM_STATE_CLOSED;
- }
-
- if (stream->flags & NGHTTP2_STREAM_FLAG_PUSH) {
- if (stream->shut_flags & NGHTTP2_SHUT_RD) {
- return NGHTTP2_STREAM_STATE_RESERVED_LOCAL;
- }
-
- if (stream->shut_flags & NGHTTP2_SHUT_WR) {
- return NGHTTP2_STREAM_STATE_RESERVED_REMOTE;
- }
- }
-
- if (stream->shut_flags & NGHTTP2_SHUT_RD) {
- return NGHTTP2_STREAM_STATE_HALF_CLOSED_REMOTE;
- }
-
- if (stream->shut_flags & NGHTTP2_SHUT_WR) {
- return NGHTTP2_STREAM_STATE_HALF_CLOSED_LOCAL;
- }
-
- if (stream->state == NGHTTP2_STREAM_IDLE) {
- return NGHTTP2_STREAM_STATE_IDLE;
- }
-
- return NGHTTP2_STREAM_STATE_OPEN;
-}
-
-nghttp2_stream *nghttp2_stream_get_parent(nghttp2_stream *stream) {
- return stream->dep_prev;
-}
-
-nghttp2_stream *nghttp2_stream_get_next_sibling(nghttp2_stream *stream) {
- return stream->sib_next;
-}
-
-nghttp2_stream *nghttp2_stream_get_previous_sibling(nghttp2_stream *stream) {
- return stream->sib_prev;
-}
-
-nghttp2_stream *nghttp2_stream_get_first_child(nghttp2_stream *stream) {
- return stream->dep_next;
-}
-
-int32_t nghttp2_stream_get_weight(nghttp2_stream *stream) {
- return stream->weight;
-}
-
-int32_t nghttp2_stream_get_sum_dependency_weight(nghttp2_stream *stream) {
- return stream->sum_dep_weight;
-}
-
-int32_t nghttp2_stream_get_stream_id(nghttp2_stream *stream) {
- return stream->stream_id;
-}