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); }
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(fprintf(stderr, "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; }
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; } }