hiredis笔记

同步调用

连接

redisContext* redisConnect(constchar*ip,intport);

发送命令并且获取响应

void *redisCommand(redisContext *c, const char *format, ...);
void *redisvCommand(redisContext *c, const char *format, va_list ap);
void *redisCommandArgv(redisContext *c, int argc, const char **argv, const size_t *argvlen);

返回的结果结构体为

typedef struct redisReply {
    int type; /* REDIS_REPLY_* */
    long long integer; /* The integer when type is REDIS_REPLY_INTEGER */
    int len; /* Length of string */
    char *str; /* Used for both REDIS_REPLY_ERROR and REDIS_REPLY_STRING */
    size_t elements; /* number of elements, for REDIS_REPLY_ARRAY */
    struct redisReply **element; /* elements vector for REDIS_REPLY_ARRAY */
} redisRepl

type支持的值有

• REDIS_REPLY_STRING
• REDIS_REPLY_ARRAY
• REDIS_REPLY_INTEGER
• REDIS_REPLY_NIL
• REDIS_REPLY_STATUS
• REDIS_REPLY_ERROR

阻塞模式下的管道命令

将命令写入输出缓冲区，也是在阻塞模式下的命令管道

int redisvAppendCommand(redisContext *c, const char *format, va_list ap);
int redisAppendCommand(redisContext *c, const char *format, ...);
int redisAppendCommandArgv(redisContext *c, int argc, const char **argv, const size_t *argvlen);

获取响应

int redisGetReply(redisContext *c, void **reply);
int redisGetReplyFromReader(redisContext *c, void **reply);

释放响应对象

void freeReplyObject(void *reply)