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MutexLockTest.m
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//
// PthreadMutexLockTest.m
// WGFcodeNotes
//
// Created by 白菜 on 2022/10/10.
// Copyright © 2022 WG. All rights reserved.
//
#import "MutexLockTest.h"
#import <pthread.h>
@interface MutexLockTest()
@property(nonatomic, assign) pthread_mutex_t moneyLock;
@property(nonatomic, assign) pthread_mutex_t ticketsLock;
@end
@implementation MutexLockTest
/// 初始化mutex
-(void)__initMutexLock:(pthread_mutex_t *)mutex {
//静态初始化 #define PTHREAD_MUTEX_INITIALIZER {_PTHREAD_MUTEX_SIG_init, {0}}
//pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
//⚠️这种方式初始化是不行的，因为它是个结构体，所以不能这样写
//self.moneyLock = PTHREAD_MUTEX_INITIALIZER;
//动态初始化锁
//初始化属性
pthread_mutexattr_t mutexattr;
pthread_mutexattr_init(&mutexattr);
//设置属性
/*
#define PTHREAD_MUTEX_NORMAL 0 普通锁
#define PTHREAD_MUTEX_ERRORCHECK 1
#define PTHREAD_MUTEX_RECURSIVE 2 递归锁
#define PTHREAD_MUTEX_DEFAULT PTHREAD_MUTEX_NORMAL 默认锁：普通锁就是默认锁
*/
pthread_mutexattr_settype(&mutexattr, PTHREAD_MUTEX_NORMAL);
//初始化锁
pthread_mutex_init(mutex, &mutexattr);
//销毁属性
pthread_mutexattr_destroy(&mutexattr);
/*
⚠️如果属性传递的是NULL，那么就是默认锁，即普通锁,其实就是和上面的效果是一样的
pthread_mutex_init(mutex, NULL);
*/
}
-(instancetype)init {
self = [super init];
if (self) {
//初始化锁
[self __initMutexLock:&_moneyLock];
[self __initMutexLock:&_ticketsLock];
}
return self;
}
-(void)__saveMoney {
//加锁
pthread_mutex_lock(&_moneyLock);
[super __saveMoney];
//解锁
pthread_mutex_unlock(&_moneyLock);
}
-(void)__drawMoney {
//加锁
pthread_mutex_lock(&_moneyLock);
[super __drawMoney];
//解锁
pthread_mutex_unlock(&_moneyLock);
}
-(void)__saleTickets {
//加锁
pthread_mutex_lock(&_ticketsLock);
[super __saleTickets];
//解锁
pthread_mutex_unlock(&_ticketsLock);
}
/// pthread_mutex_t在不需要的时候是需要销毁的
-(void)dealloc {
pthread_mutex_destroy(&_moneyLock);
pthread_mutex_destroy(&_ticketsLock);
}
@end