3ee4d3f183
This commit changes the libuv API to return error codes directly rather
than storing them in a loop-global field.
A code snippet like this one:
if (uv_foo(loop) < 0) {
uv_err_t err = uv_last_error(loop);
fprintf(stderr, "%s\n", uv_strerror(err));
}
Should be rewritten like this:
int err = uv_foo(loop);
if (err < 0)
fprintf(stderr, "%s\n", uv_strerror(err));
The rationale for this change is that it should make creating bindings
for other languages a lot easier: dealing with struct return values is
painful with most FFIs and often downright buggy.
154 lines
3.9 KiB
C
154 lines
3.9 KiB
C
/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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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 "internal.h"
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#include <assert.h>
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#include <limits.h>
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static int uv__timer_cmp(const uv_timer_t* a, const uv_timer_t* b) {
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if (a->timeout < b->timeout)
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return -1;
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if (a->timeout > b->timeout)
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return 1;
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/*
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* compare start_id when both has the same timeout. 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__timers, uv_timer_s, tree_entry, uv__timer_cmp)
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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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int uv_timer_start(uv_timer_t* handle,
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uv_timer_cb cb,
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uint64_t timeout,
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uint64_t repeat) {
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uint64_t clamped_timeout;
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if (uv__is_active(handle))
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uv_timer_stop(handle);
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clamped_timeout = handle->loop->time + timeout;
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if (clamped_timeout < timeout)
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clamped_timeout = (uint64_t) -1;
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handle->timer_cb = cb;
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handle->timeout = clamped_timeout;
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handle->repeat = repeat;
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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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RB_INSERT(uv__timers, &handle->loop->timer_handles, handle);
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uv__handle_start(handle);
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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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if (!uv__is_active(handle))
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return 0;
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RB_REMOVE(uv__timers, &handle->loop->timer_handles, 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 (handle->timer_cb == NULL)
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return -EINVAL;
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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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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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return handle->repeat;
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}
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int uv__next_timeout(const uv_loop_t* loop) {
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const uv_timer_t* handle;
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uint64_t diff;
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/* RB_MIN expects a non-const tree root. That's okay, it doesn't modify it. */
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handle = RB_MIN(uv__timers, (struct uv__timers*) &loop->timer_handles);
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if (handle == NULL)
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return -1; /* block indefinitely */
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if (handle->timeout <= loop->time)
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return 0;
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diff = handle->timeout - loop->time;
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if (diff > INT_MAX)
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diff = INT_MAX;
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return diff;
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}
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void uv__run_timers(uv_loop_t* loop) {
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uv_timer_t* handle;
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while ((handle = RB_MIN(uv__timers, &loop->timer_handles))) {
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if (handle->timeout > loop->time)
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break;
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uv_timer_stop(handle);
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uv_timer_again(handle);
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handle->timer_cb(handle, 0);
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}
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}
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void uv__timer_close(uv_timer_t* handle) {
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uv_timer_stop(handle);
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}
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