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/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <assert.h>
#include <limits.h>
#include "uv.h"
#include "internal.h"
#include "tree.h"
#include "handle-inl.h"
/* The number of milliseconds in one second. */
#define UV__MILLISEC 1000
void uv_update_time(uv_loop_t* loop) {
uint64_t new_time = uv__hrtime(UV__MILLISEC);
assert(new_time >= loop->time);
loop->time = new_time;
}
static int uv_timer_compare(uv_timer_t* a, uv_timer_t* b) {
if (a->due < b->due)
return -1;
if (a->due > b->due)
return 1;
/*
* compare start_id when both has the same due. start_id is
* allocated with loop->timer_counter in uv_timer_start().
*/
if (a->start_id < b->start_id)
return -1;
if (a->start_id > b->start_id)
return 1;
return 0;
}
RB_GENERATE_STATIC(uv_timer_tree_s, uv_timer_s, tree_entry, uv_timer_compare)
int uv_timer_init(uv_loop_t* loop, uv_timer_t* handle) {
uv__handle_init(loop, (uv_handle_t*) handle, UV_TIMER);
handle->timer_cb = NULL;
handle->repeat = 0;
return 0;
}
void uv_timer_endgame(uv_loop_t* loop, uv_timer_t* handle) {
if (handle->flags & UV__HANDLE_CLOSING) {
assert(!(handle->flags & UV_HANDLE_CLOSED));
uv__handle_close(handle);
}
}
static uint64_t get_clamped_due_time(uint64_t loop_time, uint64_t timeout) {
uint64_t clamped_timeout;
clamped_timeout = loop_time + timeout;
if (clamped_timeout < timeout)
clamped_timeout = (uint64_t) -1;
return clamped_timeout;
}
int uv_timer_start(uv_timer_t* handle, uv_timer_cb timer_cb, uint64_t timeout,
uint64_t repeat) {
uv_loop_t* loop = handle->loop;
uv_timer_t* old;
if (timer_cb == NULL)
return UV_EINVAL;
if (uv__is_active(handle))
uv_timer_stop(handle);
handle->timer_cb = timer_cb;
handle->due = get_clamped_due_time(loop->time, timeout);
handle->repeat = repeat;
uv__handle_start(handle);
/* start_id is the second index to be compared in uv__timer_cmp() */
handle->start_id = handle->loop->timer_counter++;
old = RB_INSERT(uv_timer_tree_s, &loop->timers, handle);
assert(old == NULL);
return 0;
}
int uv_timer_stop(uv_timer_t* handle) {
uv_loop_t* loop = handle->loop;
if (!uv__is_active(handle))
return 0;
RB_REMOVE(uv_timer_tree_s, &loop->timers, handle);
uv__handle_stop(handle);
return 0;
}
int uv_timer_again(uv_timer_t* handle) {
/* If timer_cb is NULL that means that the timer was never started. */
if (!handle->timer_cb) {
return UV_EINVAL;
}
if (handle->repeat) {
uv_timer_stop(handle);
uv_timer_start(handle, handle->timer_cb, handle->repeat, handle->repeat);
}
return 0;
}
void uv_timer_set_repeat(uv_timer_t* handle, uint64_t repeat) {
assert(handle->type == UV_TIMER);
handle->repeat = repeat;
}
uint64_t uv_timer_get_repeat(const uv_timer_t* handle) {
assert(handle->type == UV_TIMER);
return handle->repeat;
}
DWORD uv__next_timeout(const uv_loop_t* loop) {
uv_timer_t* timer;
int64_t delta;
/* Check if there are any running timers
* Need to cast away const first, since RB_MIN doesn't know what we are
* going to do with this return value, it can't be marked const
*/
timer = RB_MIN(uv_timer_tree_s, &((uv_loop_t*)loop)->timers);
if (timer) {
delta = timer->due - loop->time;
if (delta >= UINT_MAX - 1) {
/* A timeout value of UINT_MAX means infinite, so that's no good. */
return UINT_MAX - 1;
} else if (delta < 0) {
/* Negative timeout values are not allowed */
return 0;
} else {
return (DWORD)delta;
}
} else {
/* No timers */
return INFINITE;
}
}
void uv_process_timers(uv_loop_t* loop) {
uv_timer_t* timer;
/* Call timer callbacks */
for (timer = RB_MIN(uv_timer_tree_s, &loop->timers);
timer != NULL && timer->due <= loop->time;
timer = RB_MIN(uv_timer_tree_s, &loop->timers)) {
uv_timer_stop(timer);
uv_timer_again(timer);
timer->timer_cb((uv_timer_t*) timer);
}
}
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