POSIX 之互斥锁（mutex）、互斥锁属性
0 引言
在多线程程序设计时不可避免地会遇到线程同步问题，最常用的操作就是进行加锁，通过加锁来保证数据的准确性，在所有加锁方式中最简单、最常用也就是mutex锁，本博文将详细介绍posix mutex的使用，本文主要内容：
- Mutex Synchronization APIs
- Mutex Attributes
1 Mutex
1.1 Mutex Manage APIs List Table
Mutex 比较简单，锁的状态只有两种：加锁 解锁，mutex主要的操作如下表：
| 函数 | 描述 | Linux | VxWorks | 备注 |
|---|---|---|---|---|
| pthread_mutex_init() | Initialize Mutex | support | support | |
| pthread_mutex_destroy() | Destroy Mutex | support | support | |
| pthread_mutex_lock() | Lock Mutex | support | support | |
| pthread_mutex_unlock() | Unlock Mutex | support | support | |
| pthread_mutex_trylock() | Lock Mutex with No Wait | support | support | |
| pthread_mutex_timedlock_np() | Lock Mutex with Time-out | support | support | |
| pthread_lock_global_np() | Lock a Global Mutex | support | support | |
| pthread_unlock_global_np() | Unlock a Global Mutex | support | support |
1.2 APIs详解
1.2.1 pthread_mutex_init和pthread_mutex_destroy。。。。。。详解介绍各个api的具体用法 以及在Linux和VxWorks下的不同
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2 Mutex Attributes
2.1 Mutex Attributes APIs List Table
| 函数 | 描述 | Linux | VxWorks | 备注 |
|---|---|---|---|---|
| pthread_mutexattr_init() | Initialize Mutex Attributes Object | support | support | |
| pthread_mutexattr_destroy() | Destroy Mutex Attributes Object | support | support | |
| pthread_mutexattr_getkind_np() | Get Mutex Kind Attribute | support | support | |
| pthread_mutexattr_setkind_np() | Get Mutex Kind Attribute | support | support | |
| pthread_mutexattr_getname_np() | Get Name from Mutex Attributes Object | support | support | |
| pthread_mutexattr_setname_np() | Set Name in Mutex Attributes Object | support | support | |
| pthread_mutexattr_getpshared() | Get Process Shared Attribute from Mutex Attributes Object | support | support | |
| pthread_mutexattr_setpshared() | Set Process Shared Attribute in Mutex Attributes Object | support | support | |
| pthread_mutexattr_gettype() | Get Mutex Type Attribute | support | support | |
| pthread_mutexattr_settype() | Set Mutex Type Attribute | support | support | |
| pthread_set_mutexattr_default_np() | Set Default Mutex Attributes Object Kind Attribute | support | support | |
| pthread_mutexattr_getprioceiling() | Get Mutex Prioceiling Attribute | support | support | |
| pthread_mutexattr_setprioceiling() | Set Mutex Prioceiling Attribute | support | support | |
| pthread_mutexattr_getprotocol() | Get Mutex Protocol Attribute | support | support | |
| pthread_mutexattr_setprotocol() | Set Mutex Protocol Attribute | support | support | |
| pthread_mutex_getprioceiling() | Get Mutex Prioceiling | support | support | |
| pthread_mutex_setprioceiling() | Set Mutex Prioceiling | support | support |
2.2 APIs详解
2.2.1 pthread_mutexattr_init() pthread_mutexattr_destroy()
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