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/*
* Copyright (c) 2009-2011, Salvatore Sanfilippo <antirez at gmail dot com>
*
* SPDX-FileCopyrightText: 2024 Hiredict Contributors
* SPDX-FileCopyrightText: 2024 Salvatore Sanfilippo <antirez at gmail dot com>
*
* SPDX-License-Identifier: BSD-3-Clause
* SPDX-License-Identifier: LGPL-3.0-or-later
*
*/
#ifndef __HIREDICT_LIBUV_H__
#define __HIREDICT_LIBUV_H__
#include <stdlib.h>
#include <uv.h>
#include "../hiredict.h"
#include "../async.h"
#include <string.h>
typedef struct redictLibuvEvents {
redictAsyncContext* context;
uv_poll_t handle;
uv_timer_t timer;
int events;
} redictLibuvEvents;
static void redictLibuvPoll(uv_poll_t* handle, int status, int events) {
redictLibuvEvents* p = (redictLibuvEvents*)handle->data;
int ev = (status ? p->events : events);
if (p->context != NULL && (ev & UV_READABLE)) {
redictAsyncHandleRead(p->context);
}
if (p->context != NULL && (ev & UV_WRITABLE)) {
redictAsyncHandleWrite(p->context);
}
}
static void redictLibuvAddRead(void *privdata) {
redictLibuvEvents* p = (redictLibuvEvents*)privdata;
if (p->events & UV_READABLE) {
return;
}
p->events |= UV_READABLE;
uv_poll_start(&p->handle, p->events, redictLibuvPoll);
}
static void redictLibuvDelRead(void *privdata) {
redictLibuvEvents* p = (redictLibuvEvents*)privdata;
p->events &= ~UV_READABLE;
if (p->events) {
uv_poll_start(&p->handle, p->events, redictLibuvPoll);
} else {
uv_poll_stop(&p->handle);
}
}
static void redictLibuvAddWrite(void *privdata) {
redictLibuvEvents* p = (redictLibuvEvents*)privdata;
if (p->events & UV_WRITABLE) {
return;
}
p->events |= UV_WRITABLE;
uv_poll_start(&p->handle, p->events, redictLibuvPoll);
}
static void redictLibuvDelWrite(void *privdata) {
redictLibuvEvents* p = (redictLibuvEvents*)privdata;
p->events &= ~UV_WRITABLE;
if (p->events) {
uv_poll_start(&p->handle, p->events, redictLibuvPoll);
} else {
uv_poll_stop(&p->handle);
}
}
static void on_timer_close(uv_handle_t *handle) {
redictLibuvEvents* p = (redictLibuvEvents*)handle->data;
p->timer.data = NULL;
if (!p->handle.data) {
// both timer and handle are closed
hi_free(p);
}
// else, wait for `on_handle_close`
}
static void on_handle_close(uv_handle_t *handle) {
redictLibuvEvents* p = (redictLibuvEvents*)handle->data;
p->handle.data = NULL;
if (!p->timer.data) {
// timer never started, or timer already destroyed
hi_free(p);
}
// else, wait for `on_timer_close`
}
// libuv removed `status` parameter since v0.11.23
// see: https://github.com/libuv/libuv/blob/v0.11.23/include/uv.h
#if (UV_VERSION_MAJOR == 0 && UV_VERSION_MINOR < 11) || \
(UV_VERSION_MAJOR == 0 && UV_VERSION_MINOR == 11 && UV_VERSION_PATCH < 23)
static void redictLibuvTimeout(uv_timer_t *timer, int status) {
(void)status; // unused
#else
static void redictLibuvTimeout(uv_timer_t *timer) {
#endif
redictLibuvEvents *e = (redictLibuvEvents*)timer->data;
redictAsyncHandleTimeout(e->context);
}
static void redictLibuvSetTimeout(void *privdata, struct timeval tv) {
redictLibuvEvents* p = (redictLibuvEvents*)privdata;
uint64_t millsec = tv.tv_sec * 1000 + tv.tv_usec / 1000.0;
if (!p->timer.data) {
// timer is uninitialized
if (uv_timer_init(p->handle.loop, &p->timer) != 0) {
return;
}
p->timer.data = p;
}
// updates the timeout if the timer has already started
// or start the timer
uv_timer_start(&p->timer, redictLibuvTimeout, millsec, 0);
}
static void redictLibuvCleanup(void *privdata) {
redictLibuvEvents* p = (redictLibuvEvents*)privdata;
p->context = NULL; // indicate that context might no longer exist
if (p->timer.data) {
uv_close((uv_handle_t*)&p->timer, on_timer_close);
}
uv_close((uv_handle_t*)&p->handle, on_handle_close);
}
static int redictLibuvAttach(redictAsyncContext* ac, uv_loop_t* loop) {
redictContext *c = &(ac->c);
if (ac->ev.data != NULL) {
return REDICT_ERR;
}
ac->ev.addRead = redictLibuvAddRead;
ac->ev.delRead = redictLibuvDelRead;
ac->ev.addWrite = redictLibuvAddWrite;
ac->ev.delWrite = redictLibuvDelWrite;
ac->ev.cleanup = redictLibuvCleanup;
ac->ev.scheduleTimer = redictLibuvSetTimeout;
redictLibuvEvents* p = (redictLibuvEvents*)hi_malloc(sizeof(*p));
if (p == NULL)
return REDICT_ERR;
memset(p, 0, sizeof(*p));
if (uv_poll_init_socket(loop, &p->handle, c->fd) != 0) {
hi_free(p);
return REDICT_ERR;
}
ac->ev.data = p;
p->handle.data = p;
p->context = ac;
return REDICT_OK;
}
#endif
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