第二章 C语言实例 — Tokyo Cabinet 的数据库操作
最近在研究C语言对一些库的编程首先自然要安装Tokyo Cabinet
tar zxvf tokyocabinet-1.4.28.tar.gzcd tokyocabinet-1.4.28/./configuremakemake installcd ../
以下是对Tokyo Cabinet 的操作，具体解释可以看代码—代码是最好的解释.
文件名称是:tcbdb.c
/** * Operate the Tokyo Cabinet * @author zhoubaochuan * @email:rtxbc@163.com * @date:2011-07-13 * @gcc: gcc tcbdb.c-I/usr/local/include/ -L/usr/local/lib/ -ltokyocabinet -lz -lbz2 -lrt -lpthread -lm -lc -O2 -g --static */#include <stdio.h>/* Import the Tokyo Cabinet C's library*/#include <tcbdb.h>int main(int argc, char *argv[]){ char *datapath = "/opt/data/test/C/queue/tcbdb.db"; /* Allocate a region on memory */ char *dataname = (char *)tccalloc(1,1024); TCBDB *db = tcbdbnew(); /* Create a B+ tree database object*/ tcbdbsetmutex(db); tcbdbtune(db,128,256, 32749,8,10,100); tcbdbsetcache(db,1024,512); tcbdbsetxmsiz(db,1024100); if(!tcbdbopen(db,datapath,BDBOWRITER|BDBOREADER)){/* Open a database file and connect a B+ tree database object. */ fprintf(stderr,"It is failure to open a database !\n"); exit(1); } //free((void *)datapath); //fprintf(stderr,"==============It is successful to open a database : ===============\n"); char *key = "t_key"; char *value = "zhoubaochuan"; fprintf(stderr, "============== Store value. ================\n key:%s; \n value:%s \n ", key, value); /* Store a new record into a B+ tree database object. */ tcbdbput2(db, key, value); fprintf(stderr, "============== Retrieve a record. ================\n"); /* Retrieve a record in a B+ tree database object as a volatile buffer. */ char *retrieve = tcbdbget2(db,key); fprintf(stderr, "Retriver's Value:%s \n", retrieve); /* Synchronize updated contents of a B+ tree database object with the file and the device. */ tcbdbsync(db); /* 实时刷新到磁盘 */ /* Close a B+ tree database object. */ tcbdbclose(db); return 0;}
编译
gcc tcbdb.c-I/usr/local/include/ -L/usr/local/lib/ -ltokyocabinet -lz -lbz2 -lrt -lpthread -lm -lc -O2 -g --static
执行结果
# ./a.out ============== Store value. ================ key:t_key;value:zhoubaochuan============== Retrieve a record. ================Retriver's Value:zhoubaochuan
参考文献:
http://fallabs.com/tokyocabinet/
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