ios-limited buffer Problem Classic Case-producer Consumer-nsthread multithreading

Last Update:2015-12-29 Source: Internet

Author: User

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<pre>1 #import "ViewController.h"2 3 @interfaceViewcontroller ()4 {5Nsmutablearray *_arr;6Nscondition *_condition;7 }8 @end9 Ten @implementationViewcontroller one a- (void) Viewdidload { - [super viewdidload]; - the_arr =[nsmutablearray array]; -_condition =[[nscondition alloc] init]; - - + - //[self addproduct]; + a at //1:1 2:1 - //producers - //[nsthread detachnewthreadselector: @selector (addproduct) totarget:self withobject:nil]; - -Nsthread *thread1 = [[nsthread alloc] initwithtarget:self selector: @selector (addproduct)Object: nil]; - [thread1 start]; inNsthread *thread3 = [[nsthread alloc] initwithtarget:self selector: @selector (addproduct)Object: nil]; - [thread3 start]; to + //Consumer - //[nsthread detachnewthreadselector: @selector (minproduct) totarget:self withobject:nil]; the *Nsthread *thread2 = [[nsthread alloc] initwithtarget:self selector: @selector (minproduct)Object: nil]; $ [thread2 start];Panax Notoginseng - the + } a the +- (void) addproduct { - $ while(TRUE) { $ - -[_conditionLock]; the - @try{//Put the code that is likely to appear abnormal to try{...}Wuyi //Code that can potentially the throw an exception the - //[_arr objectatindex:1]; wu - while(_arr.count = =Ten) { about $NSLog (@"The warehouse is full, waiting for consumption"); - - //producers wait, warehouses have spare positions - [_condition wait]; a } + the[nsthread Sleepfortimeinterval:.2]; -NSObject *obj =[[nsobject alloc] init]; $ [_arr addobject:obj]; the theNSLog (@"production of a product, the total warehouse is%ld", _arr.count); the the - //wakes a single thread waiting on this Nscondition object (notifies consumers to Consume) in [_condition signal]; the the about the } the @catch(nsexception *exception) {//handling exceptions that occur within a try the //Handle An exception thrown in the @try block + -NSLog (@"an exception occurred%@", exception); the Bayi } the @finally{//regardless of whether an exception occurs @finally {...} will execute the //Code that gets executed whether or not a exception is thrown - -NSLog (@"@finally"); the the [_condition unlock]; the } the - the the } the 94 } the the- (void) minproduct { the 98 while(TRUE) { about - 101[_conditionLock];102 103 @try{//Put the code that is likely to appear abnormal to try{...}104 //Code that can potentially the throw an exception the 106 //[_arr objectatindex:1];107 108 while(_arr.count = =0) {109 theNSLog (@"no products in the storeroom, waiting for");111 the //producers wait, warehouses have spare positions113 [_condition wait]; the } the the 117 //nsobject *obj = [[nsobject alloc] init];118 //[_arr addobject:obj];119 [_arr removelastobject]; - 121NSLog (@"consumption of a product, the total warehouse is%ld", _arr.count);122 123 124 //wakes a single thread waiting on this Nscondition object (notifies the producer to Produce) the [_condition signal];126 127 } - @catch(nsexception *exception) {//handling exceptions that occur within a try129 //Handle An exception thrown in the @try block the 131NSLog (@"an exception occurred%@", exception); the 133 }134 @finally{//regardless of whether an exception occurs @finally {...} will execute135 //Code that gets executed whether or not a exception is thrown136 137NSLog (@"@finally");138 139 [_condition unlock]; $ }141 142 143 144 }145 146}</pre>ios-limited buffer Problem Classic Case-producer Consumer-nsthread multithreading

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ios-limited buffer Problem Classic Case-producer Consumer-nsthread multithreading

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