9efa8b3571
This commit changes how the event loop determines if it needs to stay alive. Previously, an internal counter was increased whenever a handle got created and decreased again when the handle was closed. While conceptually simple, it turned out hard to work with: you often want to keep the event loop alive only if the handle is actually doing something. Stopped or inactive handles were a frequent source of hanging event loops. That's why this commit changes the reference counting scheme to a model where a handle only references the event loop when it's active. 'Active' means different things for different handle types, e.g.: * timers: ticking * sockets: reading, writing or listening * processes: always active (for now, subject to change) * idle, check, prepare: only active when started This commit also changes how the uv_ref() and uv_unref() functions work: they now operate on the level of individual handles, not the whole event loop. The Windows implementation was done by Bert Belder.
90 lines
2.1 KiB
C
90 lines
2.1 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 "uv.h"
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#include "task.h"
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#include <stdio.h>
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#include <stdlib.h>
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static uv_idle_t idle;
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static const int max_opened = 10000;
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static const int max_delta = 4000;
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static int opened = 0;
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static int closed = 0;
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void work_cb(uv_work_t* work) {
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/* continue as fast as possible */
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}
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void after_work_cb(uv_work_t* work) {
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free(work);
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closed++;
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}
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void make_eio_req(void) {
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uv_work_t* w;
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opened++;
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w = (uv_work_t*) malloc(sizeof(*w));
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ASSERT(w != NULL);
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uv_queue_work(uv_default_loop(), w, work_cb, after_work_cb);
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}
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void idle_cb(uv_idle_t* idle, int status) {
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ASSERT(opened - closed < max_delta);
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if (opened <= max_opened) {
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int i;
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for (i = 0; i < 30; i++) {
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make_eio_req();
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}
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} else {
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int r;
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r = uv_idle_stop(idle);
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ASSERT(r == 0);
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}
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}
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TEST_IMPL(eio_overflow) {
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int r;
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r = uv_idle_init(uv_default_loop(), &idle);
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ASSERT(r == 0);
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r = uv_idle_start(&idle, idle_cb);
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ASSERT(r == 0);
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r = uv_run(uv_default_loop());
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ASSERT(r == 0);
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return 0;
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}
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