查找 time_t 的定义

又读expert c programming.

/usr/include$ grep time_t time.h


typedef __time_t time_t;

/usr/include$ grep __time_t time.h

# include /* This defines __time_t for us.  */ (这个注释的好处...)

/usr/include$ grep __time_t bits/types.h 

__STD_TYPE __TIME_T_TYPE __time_t; /* Seconds since the Epoch.  */

而__STD_TYPE 其实就是typedef

l5g@desktop:/usr/include$ grep include bits/types.h
 * Never include this file directly; use instead.
#include
#include
#include /* Defines __*_T_TYPE macros.  */






l5g@desktop:/usr/include$ grep __TIMER_T_TYPE bits/typesizes.h
#define __TIMER_T_TYPE void *

终于到最后了 其实就是一个 void *