Linux多线程教程及相关定义-优快云博客

本文链接：https://blog.youkuaiyun.com/code_debugger/article/details/43833389

本文详细介绍了POSIX线程中信号量与互斥锁的区别，包括它们的内部类型定义及使用场景。通过比较，帮助开发者更清晰地理解并选择合适的同步原语。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

教程链接：

http://www.ibm.com/developerworks/cn/linux/thread/posix_thread1/

http://www.ibm.com/developerworks/cn/linux/thread/posix_thread2/

http://www.ibm.com/developerworks/cn/linux/thread/posix_thread3/

pthread内部类型定义：

Type definition file path list:

/usr/include/x86_64-linux-gnu/bits/pthreadtypes.h

/usr/include/x86_64-linux-gnu/bits/siginfo.h

/usr/include/x86_64-linux-gnu/bits/semaphore.h

typedef unsigned long in pthread_t;

union pthread_attr_t 
{  
  char __size[56];  
  long int __align;  
};

union pthread_attr_t 
{     
  char __size[56];
  long int __align;
};

typedef union pthread_attr_t pthread_attr_t;

typedef union
{  
  struct __pthread_mutex_s  
  {  
    int __lock;  
    unsigned int __count;  
    int __owner;  
  
    unsigned int __nusers;  
  
    int __kind;  
  
    int __spins;  
    __pthread_list_t __list;  
  } __data;  
  char __size[40];  
  long int __align;  
} pthread_mutex_t;

typedef union  
{  
  struct  
  {   
    int __lock;  
    unsigned int __futex;  
    __extension__ unsigned long long int __total_seq;  
    __extension__ unsigned long long int __wakeup_seq;  
    __extension__ unsigned long long int __woken_seq;  
    void *__mutex;  
    unsigned int __nwaiters;  
    unsigned int __broadcast_seq;  
  } __data;  
  char __size[48];  
  __extension__ long long int __align;  
} pthread_cond_t;

#if __WORDSIZE == 64
# define __SIZEOF_SEM_T 32
#else
# define __SIZEOF_SEM_T 16
#endif

typedef union
{
  char __size[__SIZEOF_SEM_T];
  long int __align;
} sem_t;

有关信号量和互斥锁的区别请见

Linux多线程 教程及相关定义

Linux多线程教程及相关定义