ffa8666a64
When there is an I/O error, errno should be used to find out what is wrong. In other cases, errno cannot be used. So, use an explicit type in Hiredis to define the different error scenarios that can occur.
95 lines
4.0 KiB
C
95 lines
4.0 KiB
C
/*
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* Copyright (c) 2009-2010, Salvatore Sanfilippo <antirez at gmail dot com>
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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_ASYNC_H
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#define __HIREDIS_ASYNC_H
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#include "hiredis.h"
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struct redisAsyncContext; /* need forward declaration of redisAsyncContext */
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/* Reply callback prototype and container */
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typedef void (redisCallbackFn)(struct redisAsyncContext*, void*, void*);
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typedef struct redisCallback {
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struct redisCallback *next; /* simple singly linked list */
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redisCallbackFn *fn;
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void *privdata;
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} redisCallback;
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/* List of callbacks for either regular replies or pub/sub */
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typedef struct redisCallbackList {
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redisCallback *head, *tail;
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} redisCallbackList;
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/* Disconnect callback prototype */
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typedef void (redisDisconnectCallback)(const struct redisAsyncContext*, int status);
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/* Context for an async connection to Redis */
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typedef struct redisAsyncContext {
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/* Hold the regular context, so it can be realloc'ed. */
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redisContext c;
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/* Setup error flags so they can be used directly. */
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int err;
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char *errstr;
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/* Called when the library expects to start reading/writing.
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* The supplied functions should be idempotent. */
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void (*evAddRead)(void *privdata);
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void (*evDelRead)(void *privdata);
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void (*evAddWrite)(void *privdata);
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void (*evDelWrite)(void *privdata);
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void (*evCleanup)(void *privdata);
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void *data;
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/* Called when either the connection is terminated due to an error or per
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* user request. The status is set accordingly (REDIS_OK, REDIS_ERR). */
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redisDisconnectCallback *onDisconnect;
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/* Reply callbacks */
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redisCallbackList replies;
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} redisAsyncContext;
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/* Functions that proxy to hiredis */
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redisAsyncContext *redisAsyncConnect(const char *ip, int port);
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int redisAsyncSetReplyObjectFunctions(redisAsyncContext *ac, redisReplyObjectFunctions *fn);
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int redisAsyncSetDisconnectCallback(redisAsyncContext *ac, redisDisconnectCallback *fn);
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void redisAsyncDisconnect(redisAsyncContext *ac);
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/* Handle read/write events */
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void redisAsyncHandleRead(redisAsyncContext *ac);
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void redisAsyncHandleWrite(redisAsyncContext *ac);
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/* Command functions for an async context. Write the command to the
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* output buffer and register the provided callback. */
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int redisvAsyncCommand(redisAsyncContext *ac, redisCallbackFn *fn, void *privdata, const char *format, va_list ap);
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int redisAsyncCommand(redisAsyncContext *ac, redisCallbackFn *fn, void *privdata, const char *format, ...);
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int redisAsyncCommandArgv(redisAsyncContext *ac, redisCallbackFn *fn, void *privdata, int argc, const char **argv, const size_t *argvlen);
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#endif
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