ub_server_running

2016-06-22 11:31:05   0  举报

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ub_server_running 是一个用于检测服务器运行状态的变量。当服务器正常运行时，该变量的值为 True，表示服务器正在运行；反之，如果服务器出现故障或停止运行，该变量的值为 False，表示服务器未运行。通过监控 ub_server_running 的值，可以实时了解服务器的工作状态，以便及时处理可能出现的问题。在编写程序时，可以使用 if-else 语句根据 ub_server_running 的值来执行相应的操作，例如启动服务、重启服务或者发送报警通知等。总之，ub_server_running 是一个简单实用的工具，可以帮助我们更好地管理和维护服务器。

作者其他创作

大纲/内容

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void* user_buf

void* parent

指针service_handler_base*

thread_data

从client fd读入请求内容

12 pointers 1 per threadeach stores addr of athread_instance_data objadjacently allocated in heap

type=void *size=8 bytes

...........................

nshead

mcpack

ub_server_pdata_t

int fd

字符串\"create_direct_trans\"

一个thread的client fd读入的请求放入本thread的read buffer发往该thread的thread_instance_data里面的handlers_ map里面的对应的service_handler_wrapper对象中的handler对象，比如create_direct_trans_service对象的handle函数处理处理的响应也存入本thread的write buffer最终发给本thread的client fd

内部调用obj-handle()

void* data

thread_instance_data

create_direct_trans_service obj

pay_direct_trans_service obj

pthread_t pid

void* write_buf

12 thread_instance_data obj separately allocated in heap

按nshead+mcpack协议解析请求内容供实际各service对象的handle函数内部消费

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ub_server_handle

Stack

void* usersef_buf

each per-thread pointerstores addr of another pointer storing the addr of the per-thread thread_instance_data obj

type=void*size=sizeof(/thread_instance_data**)

1)inside one thread_instance_data its thread_data member variable is used by all service objs like create_direct_trans_serice for construction2)members of thread_data like sql_db_session_map are initialized inside constructors of service classes like create_direct_trans_service

int (* cb_native)()

....................

thread_instance_data for thread 0newed inside dispatcher::create_thread_datahold own map of cmd-service_handler_wrapper*

total size=12*sizeof(void *)there are 12 pointers1 per threadadjacently allocated in heap

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int sev_sock

字符串\"pay_direct_trans\"

void* pool

each thread_instance_data objhas its own set of pointerspointing to their own set of service objs like create_direct_trans_serivce

void* read_buf

Heap

向client fd写入响应内容