libevent源码 event_config_new()，event_base_new_with_config(const struct event_config *)

struct event_config *event_config_new(void);

/**
   Allocates a new event configuration object.
　　分配一个新的event_config对象
   The event configuration object can be used to change the behavior of
   an event base.
　　event_config对象可以用于更改event base的行为
   @return an event_config object that can be used to store configuration, or
     NULL if an error is encountered.
　　返回一个event_config 对象，由于存储配置，当发生错误返回NULL
   @see event_base_new_with_config(), event_config_free(), event_config
*/

 

struct event_base *event_base_new_with_config(const struct event_config *);

/**
  Initialize the event API.
　　初始化event接口

  Use event_base_new_with_config() to initialize a new event base, taking
  the specified configuration under consideration.  The configuration object
  can currently be used to avoid certain event notification mechanisms.
　　通过event_base_new_with_config(),使用指定位置的配置来初始化一个新的event base.
使用的配置对象可用于避免默写事件通知机制。

  @param cfg the event configuration object 配置对象，为event使用
  @return an initialized event_base that can be used to registering events,
     or NULL if no event base can be created with the requested event_config.
　　可用于注册事件的已初始化的event_base，如果为NULL，表示以指定的event_config,不能穿件event base
  @see event_base_new(), event_base_free(), event_init(), event_assign()
*/