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Introduced chained buffer completion handlers.

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This commit is contained in:
Igor Sysoev
2019-11-14 16:39:48 +03:00
parent 643c433f8e
commit 57e326b411
9 changed files with 115 additions and 33 deletions
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57
src/nxt_sendbuf.c
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@@ -9,6 +9,8 @@
static nxt_bool_t nxt_sendbuf_copy(nxt_buf_mem_t *bm, nxt_buf_t *b,
size_t *copied);
static nxt_buf_t *nxt_sendbuf_coalesce_completion(nxt_task_t *task,
nxt_work_queue_t *wq, nxt_buf_t *start);
nxt_uint_t
@@ -380,15 +382,11 @@ nxt_sendbuf_completion(nxt_task_t *task, nxt_work_queue_t *wq, nxt_buf_t *b)
{
while (b != NULL) {
nxt_prefetch(b->next);
if (!nxt_buf_is_sync(b) && nxt_buf_used_size(b) != 0) {
break;
}
nxt_work_queue_add(wq, b->completion_handler, task, b, b->parent);
b = b->next;
b = nxt_sendbuf_coalesce_completion(task, wq, b);
}
return b;
@@ -399,10 +397,49 @@ void
nxt_sendbuf_drain(nxt_task_t *task, nxt_work_queue_t *wq, nxt_buf_t *b)
{
while (b != NULL) {
nxt_prefetch(b->next);
nxt_work_queue_add(wq, b->completion_handler, task, b, b->parent);
b = b->next;
b = nxt_sendbuf_coalesce_completion(task, wq, b);
}
}
static nxt_buf_t *
nxt_sendbuf_coalesce_completion(nxt_task_t *task, nxt_work_queue_t *wq,
nxt_buf_t *start)
{
nxt_buf_t *b, *next, **last, *rest, **last_rest;
nxt_work_handler_t handler;
rest = NULL;
last_rest = &rest;
last = &start->next;
b = start;
handler = b->completion_handler;
for ( ;; ) {
next = b->next;
if (next == NULL) {
break;
}
b->next = NULL;
b = next;
if (!nxt_buf_is_sync(b) && nxt_buf_used_size(b) != 0) {
*last_rest = b;
break;
}
if (handler == b->completion_handler) {
*last = b;
last = &b->next;
} else {
*last_rest = b;
last_rest = &b->next;
}
}
nxt_work_queue_add(wq, handler, task, start, start->parent);
return rest;
}