用共享内存，信号灯，以及互斥锁实现进程，线程间的通信，来模拟三国问题-using shared memory, lights, and Mutex realization process, the communication between threads, to simulate the three issues
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002076s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.092778s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.014219s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001201s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001108s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003173s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000813s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003767s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016788s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001254s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 130884 [ RunTime:0.021966s ]
