196 lines
5.0 KiB
C
196 lines
5.0 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 <limits.h>
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#include "uv.h"
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#include "internal.h"
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#include "tree.h"
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#include "handle-inl.h"
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/* The number of milliseconds in one second. */
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#define UV__MILLISEC 1000
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void uv_update_time(uv_loop_t* loop) {
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uint64_t new_time = uv__hrtime(UV__MILLISEC);
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assert(new_time >= loop->time);
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loop->time = new_time;
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}
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static int uv_timer_compare(uv_timer_t* a, uv_timer_t* b) {
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if (a->due < b->due)
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return -1;
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if (a->due > b->due)
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return 1;
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/*
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* compare start_id when both has the same due. start_id is
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* allocated with loop->timer_counter in uv_timer_start().
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*/
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if (a->start_id < b->start_id)
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return -1;
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if (a->start_id > b->start_id)
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return 1;
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return 0;
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}
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RB_GENERATE_STATIC(uv_timer_tree_s, uv_timer_s, tree_entry, uv_timer_compare);
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int uv_timer_init(uv_loop_t* loop, uv_timer_t* handle) {
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uv__handle_init(loop, (uv_handle_t*) handle, UV_TIMER);
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handle->timer_cb = NULL;
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handle->repeat = 0;
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return 0;
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}
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void uv_timer_endgame(uv_loop_t* loop, uv_timer_t* handle) {
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if (handle->flags & UV__HANDLE_CLOSING) {
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assert(!(handle->flags & UV_HANDLE_CLOSED));
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uv__handle_close(handle);
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}
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}
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static uint64_t get_clamped_due_time(uint64_t loop_time, uint64_t timeout) {
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uint64_t clamped_timeout;
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clamped_timeout = loop_time + timeout;
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if (clamped_timeout < timeout)
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clamped_timeout = (uint64_t) -1;
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return clamped_timeout;
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}
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int uv_timer_start(uv_timer_t* handle, uv_timer_cb timer_cb, uint64_t timeout,
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uint64_t repeat) {
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uv_loop_t* loop = handle->loop;
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uv_timer_t* old;
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if (timer_cb == NULL)
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return UV_EINVAL;
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if (uv__is_active(handle))
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uv_timer_stop(handle);
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handle->timer_cb = timer_cb;
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handle->due = get_clamped_due_time(loop->time, timeout);
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handle->repeat = repeat;
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uv__handle_start(handle);
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/* start_id is the second index to be compared in uv__timer_cmp() */
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handle->start_id = handle->loop->timer_counter++;
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old = RB_INSERT(uv_timer_tree_s, &loop->timers, handle);
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assert(old == NULL);
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return 0;
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}
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int uv_timer_stop(uv_timer_t* handle) {
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uv_loop_t* loop = handle->loop;
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if (!uv__is_active(handle))
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return 0;
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RB_REMOVE(uv_timer_tree_s, &loop->timers, handle);
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uv__handle_stop(handle);
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return 0;
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}
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int uv_timer_again(uv_timer_t* handle) {
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/* If timer_cb is NULL that means that the timer was never started. */
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if (!handle->timer_cb) {
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return UV_EINVAL;
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}
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if (handle->repeat) {
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uv_timer_stop(handle);
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uv_timer_start(handle, handle->timer_cb, handle->repeat, handle->repeat);
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}
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return 0;
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}
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void uv_timer_set_repeat(uv_timer_t* handle, uint64_t repeat) {
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assert(handle->type == UV_TIMER);
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handle->repeat = repeat;
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}
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uint64_t uv_timer_get_repeat(const uv_timer_t* handle) {
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assert(handle->type == UV_TIMER);
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return handle->repeat;
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}
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DWORD uv__next_timeout(const uv_loop_t* loop) {
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uv_timer_t* timer;
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int64_t delta;
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/* Check if there are any running timers
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* Need to cast away const first, since RB_MIN doesn't know what we are
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* going to do with this return value, it can't be marked const
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*/
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timer = RB_MIN(uv_timer_tree_s, &((uv_loop_t*)loop)->timers);
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if (timer) {
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delta = timer->due - loop->time;
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if (delta >= UINT_MAX - 1) {
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/* A timeout value of UINT_MAX means infinite, so that's no good. */
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return UINT_MAX - 1;
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} else if (delta < 0) {
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/* Negative timeout values are not allowed */
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return 0;
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} else {
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return (DWORD)delta;
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}
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} else {
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/* No timers */
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return INFINITE;
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}
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}
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void uv_process_timers(uv_loop_t* loop) {
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uv_timer_t* timer;
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/* Call timer callbacks */
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for (timer = RB_MIN(uv_timer_tree_s, &loop->timers);
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timer != NULL && timer->due <= loop->time;
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timer = RB_MIN(uv_timer_tree_s, &loop->timers)) {
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uv_timer_stop(timer);
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uv_timer_again(timer);
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timer->timer_cb((uv_timer_t*) timer);
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}
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}
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