• 第12章线程控制总结


    1 线程属性

    线程属性:pthread_attr_t
    
    int pthread_attr_init(pthread_attr_t *attr)
    int pthread_attr_destroy(pthread_attr_t *attr)

     pthread_attr_init 为属性对象分配动态内存空间,pthread_attr_destroy将释放这些内存空间,并使用无效的值初始化属性对象,该属性对象如果再次被pthread_create调用将出错

    线程属性:

    typedef struct

    {

      int  detachstate 线程分离状态

      int schedpolicy 线程调度策略

      struct schedparam schedparam 线程调度参数

      int inheritsched 线程继承性

      int scope 线程作用域

      size_t guardsize 线程栈末尾警戒缓冲区大小

      int stackaddr_set

      void * stackaddr 线程栈的位置

      size_t  stacksize 线程栈的大小

    } pthread_attr_t;

    通过pthread_attr_getxxxx(pthread_attr_t *attr,int *val)形式的函数获取具体某个属性的值

    通过pthread_attr_setxxxx(pthread_attr_t *attr,int val)形式的函数设置具体某个属性的值

     

    2 同步属性

    互斥量属性:pthread_mutexattr_t

    int pthread_mutexattr_init(pthread_mutexattr_t *attr)
    int prthread_mutexattr_destroy(pthread_mutexattr_t *attr)

     进程共享属性:

    int pthread_mutexattr_getpshared(pthread_mutexattr_t *attr,int *pshared)
    int pthread_mutexattr_setpshared(pthread_mutexattr_t *attr,int pshared)

     类型属性:

     互斥量类型属决定了互斥量的行为:

     PTHREAD_MUTEX_NORMAL:标准类型,不做特殊的错误检查或死锁检测

     PTHREAD_MUTEX_ERRORCHECK:提供错误检查(加锁再加锁、不占用解锁)

     PTHREAD_MUTEX_RECURSIVE:允许多次加锁,并提供错误检查(不占用解锁)

     PTHREAD_MUTEX_DEFAULTlinux将该类型映射到PTHREAD_MUTEX_NORML

     

    int pthread_mutexattr_gettype(pthread_mutexattr_t *attr,int *type)
    int pthread_mutexattr_settype(pthread_mutexattr_t *attr,int type)

     

    读写锁属性:pthread_rwlockattr_t

    int pthread_rwlockattr_init(pthread_rwlockattr_t *attr)
    int pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr)
    
    int pthread_rwlockattr_getpshared(pthread_rwlockattr_t *attr,int *pshared)
    int pthread_rwlockattr_setpshared(pthread_rwlockattr_t *attr,int pshared)


    条件变量属性:pthread_condattr_t

    int pthread_condattr_init(pthread_condattr_t *attr)
    int pthread_condattr_destroy(pthread_condattr_t *attr)
    
    int pthread_condattr_getpshared(pthread_condattr_t *attr,int *pshared)
    int pthread_condattr_setpshared(pthread_condattr_t *attr,int pshared)


     

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  • 原文地址:https://www.cnblogs.com/buptlyn/p/4174675.html
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