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libco's Issues

Why not hook "sleep" and "usleep"?

As poll has been hooked, they can be easily implemented.

After hooked them, we can simply write period "consumer" program (offline scanner).

因为poll已经被挂钩,所以sleep和usleep可以轻松的用poll来实现协程式的休眠。
如果 sleep和usleep被挂钩,我们可以轻松的实现周期性工作的消费者程序(在离线扫描程序中很常见)。

Bug: PID被假定为不能超过102400

co_routine.cpp:

static stCoRoutineEnv_t* g_arrCoEnvPerThread[ 102400 ] = { 0 };

采用数组的好处显而易见,但以pid索引这个数组很可能越界。需要该为其他数据结构。

我发现co_hook_sys_call.cpp里面对connect的hook没有使用poll去等待异步结果,导致一些第三方库connect时失败

因为很多第三方库(比如hiredis或者mysql c driver) 创建连接时使用的是同步connect的函数, 接入libco后,mysql c driver 调用 mysql_real_connect 会返回115错误,调试发现当调用到hook的connect函数后,直接返回ret -1, errno为115。
我觉得这里是不是应该模拟同步connect时的ret, 即发起连接请求后立即调用co_poll yield出去,等待connect成功后再回到这里返回正确的ret。
现在的实现导致mysql c driver无法正确连接成功。

https://github.com/Tencent/libco/ 这里的版本的connect实现是对的。

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