90891b4232
If `nthreads / 2` (rounded up) DNS calls are outstanding, queue more work of that kind instead of letting it take over more positions in the thread pool, blocking other work such as the (usually much faster) file system I/O or user-scheduled work. Fixes: https://github.com/nodejs/node/issues/8436 PR-URL: https://github.com/libuv/libuv/pull/1845 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
122 lines
3.6 KiB
C
122 lines
3.6 KiB
C
/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <assert.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "uv.h"
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#include "internal.h"
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static void uv__getnameinfo_work(struct uv__work* w) {
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uv_getnameinfo_t* req;
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int err;
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socklen_t salen;
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req = container_of(w, uv_getnameinfo_t, work_req);
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if (req->storage.ss_family == AF_INET)
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salen = sizeof(struct sockaddr_in);
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else if (req->storage.ss_family == AF_INET6)
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salen = sizeof(struct sockaddr_in6);
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else
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abort();
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err = getnameinfo((struct sockaddr*) &req->storage,
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salen,
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req->host,
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sizeof(req->host),
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req->service,
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sizeof(req->service),
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req->flags);
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req->retcode = uv__getaddrinfo_translate_error(err);
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}
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static void uv__getnameinfo_done(struct uv__work* w, int status) {
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uv_getnameinfo_t* req;
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char* host;
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char* service;
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req = container_of(w, uv_getnameinfo_t, work_req);
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uv__req_unregister(req->loop, req);
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host = service = NULL;
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if (status == UV_ECANCELED) {
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assert(req->retcode == 0);
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req->retcode = UV_EAI_CANCELED;
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} else if (req->retcode == 0) {
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host = req->host;
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service = req->service;
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}
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if (req->getnameinfo_cb)
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req->getnameinfo_cb(req, req->retcode, host, service);
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}
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/*
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* Entry point for getnameinfo
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* return 0 if a callback will be made
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* return error code if validation fails
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*/
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int uv_getnameinfo(uv_loop_t* loop,
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uv_getnameinfo_t* req,
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uv_getnameinfo_cb getnameinfo_cb,
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const struct sockaddr* addr,
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int flags) {
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if (req == NULL || addr == NULL)
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return UV_EINVAL;
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if (addr->sa_family == AF_INET) {
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memcpy(&req->storage,
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addr,
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sizeof(struct sockaddr_in));
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} else if (addr->sa_family == AF_INET6) {
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memcpy(&req->storage,
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addr,
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sizeof(struct sockaddr_in6));
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} else {
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return UV_EINVAL;
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}
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uv__req_init(loop, (uv_req_t*)req, UV_GETNAMEINFO);
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req->getnameinfo_cb = getnameinfo_cb;
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req->flags = flags;
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req->type = UV_GETNAMEINFO;
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req->loop = loop;
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req->retcode = 0;
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if (getnameinfo_cb) {
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uv__work_submit(loop,
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&req->work_req,
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UV__WORK_SLOW_IO,
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uv__getnameinfo_work,
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uv__getnameinfo_done);
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return 0;
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} else {
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uv__getnameinfo_work(&req->work_req);
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uv__getnameinfo_done(&req->work_req, 0);
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return req->retcode;
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}
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}
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