//
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// GCDSemaphore.m
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// GCD
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// 用法
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// http://www.cnblogs.com/YouXianMing/p/3659204.html
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//
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// Created by XianMingYou on 15/3/15.
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// Copyright (c) 2015年 XianMingYou. All rights reserved.
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//
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#import "GCDSemaphore.h"
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@interface GCDSemaphore ()
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@property (strong, readwrite, nonatomic) dispatch_semaphore_t dispatchSemaphore;
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@end
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@implementation GCDSemaphore
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- (instancetype)init {
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self = [super init];
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if (self) {
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self.dispatchSemaphore = dispatch_semaphore_create(0);
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}
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return self;
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}
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- (instancetype)initWithValue:(long)value {
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self = [super init];
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if (self) {
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self.dispatchSemaphore = dispatch_semaphore_create(value);
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}
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return self;
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}
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- (BOOL)signal {
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return dispatch_semaphore_signal(self.dispatchSemaphore) != 0;
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}
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- (void)wait {
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dispatch_semaphore_wait(self.dispatchSemaphore, DISPATCH_TIME_FOREVER);
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}
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- (BOOL)wait:(int64_t)delta {
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return dispatch_semaphore_wait(self.dispatchSemaphore, dispatch_time(DISPATCH_TIME_NOW, delta)) == 0;
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}
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@end
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