From 0152f128072c0fe6b9c64cc50758192d2940f7cd Mon Sep 17 00:00:00 2001 From: Pieter Noordhuis Date: Sun, 31 Oct 2010 21:20:47 +0100 Subject: Extracted code to support callbacks in an asynchronous context --- async.h | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 async.h (limited to 'async.h') diff --git a/async.h b/async.h new file mode 100644 index 0000000..e0ac8bf --- /dev/null +++ b/async.h @@ -0,0 +1,80 @@ +/* + * Copyright (c) 2009-2010, Salvatore Sanfilippo + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Redis nor the names of its contributors may be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __HIREDIS_ASYNC_H +#define __HIREDIS_ASYNC_H +#include "hiredis.h" + +struct redisAsyncContext; /* need forward declaration of redisAsyncContext */ + +/* Reply callback prototype and container */ +typedef void (redisCallbackFn)(struct redisAsyncContext*, redisReply*, void*); +typedef struct redisCallback { + struct redisCallback *next; /* simple singly linked list */ + redisCallbackFn *fn; + void *privdata; +} redisCallback; + +/* List of callbacks for either regular replies or pub/sub */ +typedef struct redisCallbackList { + redisCallback *head, *tail; +} redisCallbackList; + +/* Context for an async connection to Redis */ +typedef struct redisAsyncContext { + /* Hold the regular context, so it can be realloc'ed. */ + redisContext c; + + /* Called when the library expects to start reading/writing. + * The supplied functions should be idempotent. */ + void (*evAddRead)(void *privdata); + void (*evDelRead)(void *privdata); + void (*evAddWrite)(void *privdata); + void (*evDelWrite)(void *privdata); + void *data; + + /* Reply callbacks */ + redisCallbackList replies; +} redisAsyncContext; + +/* Functions that proxy to hiredis */ +redisAsyncContext *redisAsyncConnect(const char *ip, int port); +int redisAsyncSetReplyObjectFunctions(redisAsyncContext *c, redisReplyObjectFunctions *fn); + +/* Handle read/write events */ +void redisAsyncHandleRead(redisAsyncContext *ac); +void redisAsyncHandleWrite(redisAsyncContext *ac); + +/* Command functions for an async context. Write the command to the + * output buffer and register the provided callback. */ +int redisvAsyncCommand(redisAsyncContext *c, redisCallbackFn *fn, void *privdata, const char *format, va_list ap); +int redisAsyncCommand(redisAsyncContext *c, redisCallbackFn *fn, void *privdata, const char *format, ...); +int redisAsyncCommandArgv(redisAsyncContext *c, redisCallbackFn *fn, void *privdata, int argc, const char **argv, const size_t *argvlen); + +#endif -- cgit v1.2.3