[nginx source code analysis] Configuration analysis (event scope)

Processing events

There are two modules that conform to NGX_EVENT_MODULE, namely ngx_event_core_module and ngx_epoll_module

Core code

  ngx_modules[i]->ctx_index = ngx_event_max_module++;//设置模块内部索引
      }                                                                                                                                                             
  
      ctx = ngx_pcalloc(cf->pool, sizeof(void *));
      if (ctx == NULL) {
          return NGX_CONF_ERROR;
      }
  
      *ctx = ngx_pcalloc(cf->pool, ngx_event_max_module * sizeof(void *));//ctx指向数组
      if (*ctx == NULL) {
          return NGX_CONF_ERROR;
      }
  
      *(void **) conf = ctx;
  
      for (i = 0; ngx_modules[i]; i++) {
          if (ngx_modules[i]->type != NGX_EVENT_MODULE) {
              continue;
          }
  
          m = ngx_modules[i]->ctx;
  
          if (m->create_conf) {//如果NGX_EVENT_MODULE类型模块存在create_conf函数那么就调用该模块的create_conf函数，挂载到event上下文中
              (*ctx)[ngx_modules[i]->ctx_index] = m->create_conf(cf->cycle);//创建相应上下文
              if ((*ctx)[ngx_modules[i]->ctx_index] == NULL) {
                  return NGX_CONF_ERROR;
              }
          }
      }
  
      pcf = *cf;
      cf->ctx = ctx;
      cf->module_type = NGX_EVENT_MODULE;//设置模块环境
      cf->cmd_type = NGX_EVENT_CONF;		//设置命令类型
rv = ngx_conf_parse(cf, NULL);

Then parse worker_connections1024, this command is in ngx_event_core_module, call ngx_even t_connections function, set the connect value to 1024, the structure is as follows :

The above introduces [nginx source code analysis] configuration analysis (event scope), including the content. I hope it will be helpful to friends who are interested in PHP tutorials.