8e0264cfd6
* Adds an indirection to every allocation/deallocation to allow users to plug in ones of their choosing (use custom functions, jemalloc, etc). * Gracefully handle OOM everywhere in hiredis. This should make it possible for users of the library to have more flexibility in how they handle such situations. * Changes `redisReaderTask->elements` from an `int` to a `long long` to prevent a possible overflow when transferring the task elements into a `redisReply`. * Adds a configurable `max elements` member to `redisReader` that defaults to 2^32 - 1. This can be set to "unlimited" by setting the value to zero.
131 lines
4.2 KiB
C
131 lines
4.2 KiB
C
/*
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* Copyright (c) 2010-2011, Pieter Noordhuis <pcnoordhuis at gmail dot com>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Redis nor the names of its contributors may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __HIREDIS_AE_H__
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#define __HIREDIS_AE_H__
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#include <sys/types.h>
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#include <ae.h>
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#include "../hiredis.h"
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#include "../async.h"
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typedef struct redisAeEvents {
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redisAsyncContext *context;
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aeEventLoop *loop;
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int fd;
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int reading, writing;
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} redisAeEvents;
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static void redisAeReadEvent(aeEventLoop *el, int fd, void *privdata, int mask) {
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((void)el); ((void)fd); ((void)mask);
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redisAeEvents *e = (redisAeEvents*)privdata;
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redisAsyncHandleRead(e->context);
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}
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static void redisAeWriteEvent(aeEventLoop *el, int fd, void *privdata, int mask) {
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((void)el); ((void)fd); ((void)mask);
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redisAeEvents *e = (redisAeEvents*)privdata;
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redisAsyncHandleWrite(e->context);
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}
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static void redisAeAddRead(void *privdata) {
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redisAeEvents *e = (redisAeEvents*)privdata;
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aeEventLoop *loop = e->loop;
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if (!e->reading) {
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e->reading = 1;
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aeCreateFileEvent(loop,e->fd,AE_READABLE,redisAeReadEvent,e);
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}
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}
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static void redisAeDelRead(void *privdata) {
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redisAeEvents *e = (redisAeEvents*)privdata;
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aeEventLoop *loop = e->loop;
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if (e->reading) {
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e->reading = 0;
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aeDeleteFileEvent(loop,e->fd,AE_READABLE);
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}
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}
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static void redisAeAddWrite(void *privdata) {
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redisAeEvents *e = (redisAeEvents*)privdata;
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aeEventLoop *loop = e->loop;
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if (!e->writing) {
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e->writing = 1;
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aeCreateFileEvent(loop,e->fd,AE_WRITABLE,redisAeWriteEvent,e);
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}
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}
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static void redisAeDelWrite(void *privdata) {
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redisAeEvents *e = (redisAeEvents*)privdata;
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aeEventLoop *loop = e->loop;
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if (e->writing) {
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e->writing = 0;
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aeDeleteFileEvent(loop,e->fd,AE_WRITABLE);
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}
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}
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static void redisAeCleanup(void *privdata) {
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redisAeEvents *e = (redisAeEvents*)privdata;
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redisAeDelRead(privdata);
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redisAeDelWrite(privdata);
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hi_free(e);
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}
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static int redisAeAttach(aeEventLoop *loop, redisAsyncContext *ac) {
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redisContext *c = &(ac->c);
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redisAeEvents *e;
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/* Nothing should be attached when something is already attached */
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if (ac->ev.data != NULL)
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return REDIS_ERR;
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/* Create container for context and r/w events */
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e = (redisAeEvents*)hi_malloc(sizeof(*e));
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if (e == NULL)
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return REDIS_ERR;
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e->context = ac;
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e->loop = loop;
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e->fd = c->fd;
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e->reading = e->writing = 0;
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/* Register functions to start/stop listening for events */
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ac->ev.addRead = redisAeAddRead;
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ac->ev.delRead = redisAeDelRead;
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ac->ev.addWrite = redisAeAddWrite;
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ac->ev.delWrite = redisAeDelWrite;
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ac->ev.cleanup = redisAeCleanup;
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ac->ev.data = e;
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return REDIS_OK;
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}
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#endif
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