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cocos2dx多线程以及线程同步 与 cocos2dx内存管理与多线程问题

Cocos2d-x   发布时间：2022-05-02  发布网站：大佬教程  code.js-code.com
大佬教程收集整理的这篇文章主要介绍了cocos2dx多线程以及线程同步 与 cocos2dx内存管理与多线程问题，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
@H_696_2@

cocos2dx多线程以及线程同步 与 cocos2dx内存管理与多线程问题@H_696_2@

分类：移动研发COCOS2DX移动ANDROID研发 IOS研发@H_696_2@ 2013-11-07 16:17@H_696_2@ 7573人阅读@H_696_2@ 评论(5)@H_696_2@ 收藏@H_696_2@ 举报@H_696_2@

目录(?)@H_696_2@[+]

@H_696_2@

cocos2d-x引擎在内部实现了一个庞大的主循环，每帧之间更新界面，如果耗时的操作放到了主线程中，游戏的界面就会卡，这是不能容忍的，游戏最基本的条件就是流畅性，这就是为什么游戏开发选择C++的原因。另外现在双核手机和四核手机越来越普遍了，是时候使用多线程来挖掘硬件的潜力了。@H_696_2@

1.环境搭建@H_696_2@

cocos2d-x中的多线程使用pthread就可以实现跨平台，而且也不是很难理解。使用pthread需要先配置一下工程。右击工程----->属性----->配置属性---->链接器----->输入---->附加依赖项中添加pthreadVCE2.lib，如下图@H_696_2@


@H_696_2@

接着添加附加包含目录，右击项目，属性----->C/C++---->常规----->附加包含目录加入pthread头文件所在的目录@H_696_2@


@H_696_2@

这样，环境就搭建起来了。@H_696_2@

2.多线程的使用@H_696_2@

使用pthread来实现多线程，最重要的一个函数是@H_696_2@

[cpp] view plain copy
  1. PTW32_DLLPORTint@H_696_2@PTW32_CDECLpthread_create(pthread_t*tid,//线程的标示@H_696_2@
  2. const@H_696_2@pthread_attr_t*attr,0); BACkground-color:inherit">//创建线程的参数@H_696_2@
  3. void@H_696_2@*(*start)(void@H_696_2@*),0); BACkground-color:inherit">//入口函数的指针@H_696_2@
  4. void@H_696_2@*arg);//传递给线程的数据@H_696_2@
[cpp] view plain copy
    PTW32_DLLPORT@H_696_2@int@H_696_2@PTW32_CDECLpthread_create(pthread_t*tid,@H_696_2@//线程的标示@H_696_2@@H_696_2@@H_696_2@
  1. const@H_696_2@pthread_attr_t*attr,0); BACkground-color:inherit">//创建线程的参数@H_696_2@@H_696_2@@H_696_2@
  2. void@H_696_2@*(*start)(@H_696_2@void@H_696_2@*),0); BACkground-color:inherit">//入口函数的指针@H_696_2@@H_696_2@@H_696_2@
  3. void@H_696_2@*arg);@H_696_2@//传递给线程的数据@H_696_2@@H_696_2@@H_696_2@

在HelloWorldScene.h文件中@H_696_2@@H_696_2@

copy
    pthread_tpidrun,pidgo;
  1. static@H_696_2@void@H_696_2@*th_run(void@H_696_2@*r);
  2. void@H_696_2@*th_go(void@H_696_2@*r);
copy
    pthread_tpidrun,pidgo;@H_696_2@
  1. static@H_696_2@@H_696_2@void@H_696_2@*th_run(@H_696_2@void@H_696_2@*r);@H_696_2@@H_696_2@
  2. void@H_696_2@*th_go(@H_696_2@void@H_696_2@*r);@H_696_2@@H_696_2@
定义了两个函数和两个线程的标识。@H_696_2@

然后自定义了一个类，用于给线程传递数据。student类如下：@H_696_2@

copy
    #pragmaonce@H_696_2@
  1. #include<String>@H_696_2@
  2. class@H_696_2@student
  3. {
  4. public@H_696_2@:
  5. student(void@H_696_2@);
  6. student(std::stringname,int@H_696_2@age,std::stringseX);
  7. ~student(
  8. std::stringname;
  9. int@H_696_2@age;
  10. std::stringsex;
  11. };
copy
    #pragmaonce@H_696_2@@H_696_2@@H_696_2@
  1. #include<String>@H_696_2@@H_696_2@@H_696_2@
  2. class@H_696_2@student@H_696_2@@H_696_2@
  3. {@H_696_2@
  4. public@H_696_2@:@H_696_2@@H_696_2@
  5. student(void@H_696_2@);@H_696_2@@H_696_2@
  6. student(std::stringname,87); BACkground-color:inherit; font-weight:bold">int@H_696_2@age,std::stringseX);@H_696_2@@H_696_2@
  7. ~student( @H_696_2@
  8. std::stringname;@H_696_2@
  9. int@H_696_2@age;@H_696_2@@H_696_2@
  10. std::stringsex;@H_696_2@
  11. };@H_696_2@

源文件如下@H_696_2@

copy
    #include"student.h"@H_696_2@
  1. #include"cocos2d.h"@H_696_2@
  2. student::student(void@H_696_2@)
  3. {
  4. }
  6. student::~student(void@H_696_2@)
  7. cocos2d::CCLog("deletedata"@H_696_2@);
  8. student::student(std::stringname,std::stringseX)
  9. this@H_696_2@->name=name;
  10. this@H_696_2@->age=age;
  11. this@H_696_2@->sex=sex;
  12. }
copy
    #include"student.h"@H_696_2@@H_696_2@@H_696_2@
  1. #include"cocos2d.h"@H_696_2@@H_696_2@@H_696_2@
  2. student::student(void@H_696_2@)@H_696_2@@H_696_2@
  3. {@H_696_2@
  4. }@H_696_2@
  5. @H_696_2@
  6. student::~student(void@H_696_2@)@H_696_2@@H_696_2@
  7. cocos2d::CCLog("deletedata"@H_696_2@);@H_696_2@@H_696_2@
  8. student::student(std::stringname,std::stringseX)@H_696_2@@H_696_2@
  9. this@H_696_2@->name=name;@H_696_2@@H_696_2@
  10. this@H_696_2@->age=age;@H_696_2@@H_696_2@
  11. this@H_696_2@->sex=sex;@H_696_2@@H_696_2@
  12. }@H_696_2@
在退出菜单的回调函数中启动两个线程：@H_696_2@

copy @H_772_539@
    void@H_696_2@HelloWorld::menuCloseCallBACk(CCObject*pSender)
  1. student*temp=new@H_696_2@student(std::string("zhycheng"@H_696_2@),23,std::string("male"@H_696_2@));
  2. pthread_mutex_init(&mutex,null);
  3. pthread_create(&pidrun,NULL,th_run,temp);//启动线程@H_696_2@
  4. pthread_create(&pidgo,th_go,0);
  5. }
copy
    void@H_696_2@HelloWorld::menuCloseCallBACk(CCObject*pSender)@H_696_2@@H_696_2@
  1. student*temp=new@H_696_2@student(std::string(@H_696_2@"zhycheng"@H_696_2@),std::string(@H_696_2@"male"@H_696_2@));@H_696_2@@H_696_2@
  2. pthread_mutex_init(&mutex,null);@H_696_2@
  3. pthread_create(&pidrun,0); BACkground-color:inherit">//启动线程@H_696_2@@H_696_2@@H_696_2@
  4. pthread_create(&pidgo,0);@H_696_2@
  5. }@H_696_2@

可以看到，将student的指针传递给了pidrun线程，那么在pidrun线程中获得student信息如下：@H_696_2@

copy
    student*s=(student*)(r);
  1. CCLog("nameis%s,andageis%d,sexis%s"@H_696_2@,s->name.c_str(),s->age,s->sex.c_str());
  2. delete@H_696_2@s;
copy
    student*s=(student*)(r);@H_696_2@
  1. CCLog("nameis%s,sexis%s"@H_696_2@,s->sex.c_str());@H_696_2@@H_696_2@
  2. delete@H_696_2@s;@H_696_2@@H_696_2@

3.线程同步@H_696_2@

使用了线程，必然就要考虑到线程同步，不同的线程同时访问资源的话，访问的顺序是不可预知的，会造成不可预知的结果。@H_696_2@

这里使用pthread_mutex_t来实现同步，下面我来演示一下使用多线程实现卖票系统。卖票的时候，是由多个窗口同时卖票，这里要做到一张票不要卖出去两次，不要出现有票却无法卖的结果。@H_696_2@

在线程函数th_run和th_go中来卖票，票的数量是一个全局变量，每卖出去一张票，就将票的数量减一。其中同步的pthread_mutex_t也是一个全局变量，就用它来实现线程同步。@H_696_2@

copy @H_665_696@
    void@H_696_2@*HelloWorld::th_run(void@H_696_2@*r)
  1. student*s=(student*)(r);
  2. CCLog("nameis%s,s->sex.c_str());
  3. delete@H_696_2@s;
  4. while@H_696_2@(true@H_696_2@)
  5. pthread_mutex_lock(&muteX);
  6. if@H_696_2@(ticket>0)
  7. CCLog("threadrunsell%d"@H_696_2@,ticket);
  8. ticket--;
  9. pthread_mutex_unlock(&muteX);
  10. }
  11. else@H_696_2@
  12. break@H_696_2@;
  13. Sleep(1);
  14. //Usleep(10);@H_696_2@
  15. return@H_696_2@NULL;
  16. copy
      void@H_696_2@*HelloWorld::th_run(@H_696_2@void@H_696_2@*r)@H_696_2@@H_696_2@
    1. student*s=(student*)(r);@H_696_2@
    2. CCLog("nameis%s,s->sex.c_str());@H_696_2@@H_696_2@
    3. delete@H_696_2@s;@H_696_2@@H_696_2@
    4. while@H_696_2@(@H_696_2@true@H_696_2@)@H_696_2@@H_696_2@
    5. pthread_mutex_lock(&muteX);@H_696_2@
    6. if@H_696_2@(ticket>0)@H_696_2@@H_696_2@
    7. CCLog("threadrunsell%d"@H_696_2@,ticket);@H_696_2@@H_696_2@
    8. ticket--;@H_696_2@
    9. pthread_mutex_unlock(&muteX);@H_696_2@
    10. }@H_696_2@
    11. else@H_696_2@@H_696_2@@H_696_2@
    12. break@H_696_2@;@H_696_2@@H_696_2@
    13. Sleep(1);@H_696_2@
    14. //Usleep(10);@H_696_2@@H_696_2@@H_696_2@
    15. return@H_696_2@NULL;@H_696_2@@H_696_2@
    16. }@H_696_2@

    copy
      void@H_696_2@*HelloWorld::th_go(true@H_696_2@)
    1. pthread_mutex_lock(&muteX);
    2. if@H_696_2@(ticket>0)
    3. CCLog("threadgosell%d"@H_696_2@,ticket);
    4. ticket--;
    5. pthread_mutex_unlock(&muteX);
    6. else@H_696_2@
    7. break@H_696_2@;
    8. return@H_696_2@NULL;
    9. copy
        void@H_696_2@*HelloWorld::th_go(@H_696_2@true@H_696_2@)@H_696_2@@H_696_2@
      1. pthread_mutex_lock(&muteX);@H_696_2@
      2. if@H_696_2@(ticket>0)@H_696_2@@H_696_2@
      3. CCLog("threadgosell%d"@H_696_2@,ticket);@H_696_2@@H_696_2@
      4. ticket--;@H_696_2@
      5. pthread_mutex_unlock(&muteX);@H_696_2@
      6. else@H_696_2@@H_696_2@@H_696_2@
      7. break@H_696_2@;@H_696_2@@H_696_2@
      8. return@H_696_2@NULL;@H_696_2@@H_696_2@
      9. }@H_696_2@


      @H_755_34@mutex被锁定后，其他线程若再想锁定mutex的话，必须等待，当该线程释放了mutex之后，其他线程才能锁定mutex。Sleep()函数可以使得该线程休眠，单位是毫秒。下面是卖票的结果：@H_696_2@

      copy @H_607_979@
        nameiszhycheng,andageis23,sexismale
      1. delete@H_696_2@data
      2. thread@H_696_2@runsell100
      3. thread@H_696_2@runsell99
      4. thread@H_696_2@gosell98
      5. thread@H_696_2@gosell97
      6. thread@H_696_2@runsell96
      7. thread@H_696_2@gosell95
      8. thread@H_696_2@gosell94
      9. thread@H_696_2@runsell93
      10. thread@H_696_2@gosell92
      11. thread@H_696_2@runsell91
      12. thread@H_696_2@gosell90
      13. thread@H_696_2@gosell89
      14. thread@H_696_2@runsell88
      15. thread@H_696_2@gosell87
      16. thread@H_696_2@runsell86
      17. thread@H_696_2@gosell85
      18. thread@H_696_2@runsell84
      19. thread@H_696_2@gosell83
      20. thread@H_696_2@runsell82
      21. thread@H_696_2@gosell81
      22. thread@H_696_2@runsell80
      23. thread@H_696_2@gosell79
      24. thread@H_696_2@runsell78
      25. thread@H_696_2@gosell77
      26. thread@H_696_2@runsell76
      27. thread@H_696_2@gosell75
      28. thread@H_696_2@runsell74
      29. thread@H_696_2@gosell73
      30. thread@H_696_2@runsell72
      31. thread@H_696_2@gosell71
      32. thread@H_696_2@runsell70
      33. thread@H_696_2@gosell69
      34. thread@H_696_2@gosell68
      35. thread@H_696_2@runsell67
      36. thread@H_696_2@gosell66
      37. thread@H_696_2@runsell65
      38. thread@H_696_2@gosell64
      39. thread@H_696_2@runsell63
      40. thread@H_696_2@gosell62
      41. thread@H_696_2@runsell61
      42. thread@H_696_2@gosell60
      43. thread@H_696_2@runsell59
      44. thread@H_696_2@gosell58
      45. thread@H_696_2@runsell57
      46. thread@H_696_2@gosell56
      47. thread@H_696_2@runsell55
      48. thread@H_696_2@gosell54
      49. thread@H_696_2@runsell53
      50. thread@H_696_2@runsell52
      51. thread@H_696_2@gosell51
      52. thread@H_696_2@runsell50
      53. thread@H_696_2@gosell49
      54. thread@H_696_2@runsell48
      55. thread@H_696_2@gosell47
      56. thread@H_696_2@runsell46
      57. thread@H_696_2@gosell45
      58. thread@H_696_2@runsell44
      59. thread@H_696_2@runsell43
      60. thread@H_696_2@gosell42
      61. thread@H_696_2@runsell41
      62. thread@H_696_2@runsell40
      63. thread@H_696_2@gosell39
      64. thread@H_696_2@runsell38
      65. thread@H_696_2@runsell37
      66. thread@H_696_2@runsell36
      67. thread@H_696_2@runsell35
      68. thread@H_696_2@gosell34
      69. thread@H_696_2@runsell33
      70. thread@H_696_2@runsell32
      71. thread@H_696_2@gosell31
      72. thread@H_696_2@runsell30
      73. thread@H_696_2@runsell29
      74. thread@H_696_2@runsell28
      75. thread@H_696_2@runsell27
      76. thread@H_696_2@runsell26
      77. thread@H_696_2@runsell25
      78. thread@H_696_2@gosell24
      79. thread@H_696_2@runsell23
      80. thread@H_696_2@gosell22
      81. thread@H_696_2@gosell21
      82. thread@H_696_2@runsell20
      83. thread@H_696_2@gosell19
      84. thread@H_696_2@runsell18
      85. thread@H_696_2@runsell17
      86. thread@H_696_2@gosell16
      87. thread@H_696_2@runsell15
      88. thread@H_696_2@gosell14
      89. thread@H_696_2@gosell13
      90. thread@H_696_2@runsell12
      91. thread@H_696_2@gosell11
      92. thread@H_696_2@gosell10
      93. thread@H_696_2@runsell9
      94. thread@H_696_2@gosell8
      95. thread@H_696_2@runsell7
      96. thread@H_696_2@gosell6
      97. thread@H_696_2@gosell5
      98. thread@H_696_2@runsell4
      99. thread@H_696_2@gosell3
      100. thread@H_696_2@runsell2
      101. thread@H_696_2@runsell1
      copy
        nameiszhycheng,sexismale@H_696_2@
      1. delete@H_696_2@data@H_696_2@@H_696_2@
      2. thread@H_696_2@runsell100@H_696_2@@H_696_2@
      3. thread@H_696_2@runsell99@H_696_2@@H_696_2@
      4. thread@H_696_2@gosell98@H_696_2@@H_696_2@
      5. thread@H_696_2@gosell97@H_696_2@@H_696_2@
      6. thread@H_696_2@runsell96@H_696_2@@H_696_2@
      7. thread@H_696_2@gosell95@H_696_2@@H_696_2@
      8. thread@H_696_2@gosell94@H_696_2@@H_696_2@
      9. thread@H_696_2@runsell93@H_696_2@@H_696_2@
      10. thread@H_696_2@gosell92@H_696_2@@H_696_2@
      11. thread@H_696_2@runsell91@H_696_2@@H_696_2@
      12. thread@H_696_2@gosell90@H_696_2@@H_696_2@
      13. thread@H_696_2@gosell89@H_696_2@@H_696_2@
      14. thread@H_696_2@runsell88@H_696_2@@H_696_2@
      15. thread@H_696_2@gosell87@H_696_2@@H_696_2@
      16. thread@H_696_2@runsell86@H_696_2@@H_696_2@
      17. thread@H_696_2@gosell85@H_696_2@@H_696_2@
      18. thread@H_696_2@runsell84@H_696_2@@H_696_2@
      19. thread@H_696_2@gosell83@H_696_2@@H_696_2@
      20. thread@H_696_2@runsell82@H_696_2@@H_696_2@
      21. thread@H_696_2@gosell81@H_696_2@@H_696_2@
      22. thread@H_696_2@runsell80@H_696_2@@H_696_2@
      23. thread@H_696_2@gosell79@H_696_2@@H_696_2@
      24. thread@H_696_2@runsell78@H_696_2@@H_696_2@
      25. thread@H_696_2@gosell77@H_696_2@@H_696_2@
      26. thread@H_696_2@runsell76@H_696_2@@H_696_2@
      27. thread@H_696_2@gosell75@H_696_2@@H_696_2@
      28. thread@H_696_2@runsell74@H_696_2@@H_696_2@
      29. thread@H_696_2@gosell73@H_696_2@@H_696_2@
      30. thread@H_696_2@runsell72@H_696_2@@H_696_2@
      31. thread@H_696_2@gosell71@H_696_2@@H_696_2@
      32. thread@H_696_2@runsell70@H_696_2@@H_696_2@
      33. thread@H_696_2@gosell69@H_696_2@@H_696_2@
      34. thread@H_696_2@gosell68@H_696_2@@H_696_2@
      35. thread@H_696_2@runsell67@H_696_2@@H_696_2@
      36. thread@H_696_2@gosell66@H_696_2@@H_696_2@
      37. thread@H_696_2@runsell65@H_696_2@@H_696_2@
      38. thread@H_696_2@gosell64@H_696_2@@H_696_2@
      39. thread@H_696_2@runsell63@H_696_2@@H_696_2@
      40. thread@H_696_2@gosell62@H_696_2@@H_696_2@
      41. thread@H_696_2@runsell61@H_696_2@@H_696_2@
      42. thread@H_696_2@gosell60@H_696_2@@H_696_2@
      43. thread@H_696_2@runsell59@H_696_2@@H_696_2@
      44. thread@H_696_2@gosell58@H_696_2@@H_696_2@
      45. thread@H_696_2@runsell57@H_696_2@@H_696_2@
      46. thread@H_696_2@gosell56@H_696_2@@H_696_2@
      47. thread@H_696_2@runsell55@H_696_2@@H_696_2@
      48. thread@H_696_2@gosell54@H_696_2@@H_696_2@
      49. thread@H_696_2@runsell53@H_696_2@@H_696_2@
      50. thread@H_696_2@runsell52@H_696_2@@H_696_2@
      51. thread@H_696_2@gosell51@H_696_2@@H_696_2@
      52. thread@H_696_2@runsell50@H_696_2@@H_696_2@
      53. thread@H_696_2@gosell49@H_696_2@@H_696_2@
      54. thread@H_696_2@runsell48@H_696_2@@H_696_2@
      55. thread@H_696_2@gosell47@H_696_2@@H_696_2@
      56. thread@H_696_2@runsell46@H_696_2@@H_696_2@
      57. thread@H_696_2@gosell45@H_696_2@@H_696_2@
      58. thread@H_696_2@runsell44@H_696_2@@H_696_2@
      59. thread@H_696_2@runsell43@H_696_2@@H_696_2@
      60. thread@H_696_2@gosell42@H_696_2@@H_696_2@
      61. thread@H_696_2@runsell41@H_696_2@@H_696_2@
      62. thread@H_696_2@runsell40@H_696_2@@H_696_2@
      63. thread@H_696_2@gosell39@H_696_2@@H_696_2@
      64. thread@H_696_2@runsell38@H_696_2@@H_696_2@
      65. thread@H_696_2@runsell37@H_696_2@@H_696_2@
      66. thread@H_696_2@runsell36@H_696_2@@H_696_2@
      67. thread@H_696_2@runsell35@H_696_2@@H_696_2@
      68. thread@H_696_2@gosell34@H_696_2@@H_696_2@
      69. thread@H_696_2@runsell33@H_696_2@@H_696_2@
      70. thread@H_696_2@runsell32@H_696_2@@H_696_2@
      71. thread@H_696_2@gosell31@H_696_2@@H_696_2@
      72. thread@H_696_2@runsell30@H_696_2@@H_696_2@
      73. thread@H_696_2@runsell29@H_696_2@@H_696_2@
      74. thread@H_696_2@runsell28@H_696_2@@H_696_2@
      75. thread@H_696_2@runsell27@H_696_2@@H_696_2@
      76. thread@H_696_2@runsell26@H_696_2@@H_696_2@
      77. thread@H_696_2@runsell25@H_696_2@@H_696_2@
      78. thread@H_696_2@gosell24@H_696_2@@H_696_2@
      79. thread@H_696_2@runsell23@H_696_2@@H_696_2@
      80. thread@H_696_2@gosell22@H_696_2@@H_696_2@
      81. thread@H_696_2@gosell21@H_696_2@@H_696_2@
      82. thread@H_696_2@runsell20@H_696_2@@H_696_2@
      83. thread@H_696_2@gosell19@H_696_2@@H_696_2@
      84. thread@H_696_2@runsell18@H_696_2@@H_696_2@
      85. thread@H_696_2@runsell17@H_696_2@@H_696_2@
      86. thread@H_696_2@gosell16@H_696_2@@H_696_2@
      87. thread@H_696_2@runsell15@H_696_2@@H_696_2@
      88. thread@H_696_2@gosell14@H_696_2@@H_696_2@
      89. thread@H_696_2@gosell13@H_696_2@@H_696_2@
      90. thread@H_696_2@runsell12@H_696_2@@H_696_2@
      91. thread@H_696_2@gosell11@H_696_2@@H_696_2@
      92. thread@H_696_2@gosell10@H_696_2@@H_696_2@
      93. thread@H_696_2@runsell9@H_696_2@@H_696_2@
      94. thread@H_696_2@gosell8@H_696_2@@H_696_2@
      95. thread@H_696_2@runsell7@H_696_2@@H_696_2@
      96. thread@H_696_2@gosell6@H_696_2@@H_696_2@
      97. thread@H_696_2@gosell5@H_696_2@@H_696_2@
      98. thread@H_696_2@runsell4@H_696_2@@H_696_2@
      99. thread@H_696_2@gosell3@H_696_2@@H_696_2@
      100. thread@H_696_2@runsell2@H_696_2@@H_696_2@
      101. thread@H_696_2@runsell1@H_696_2@@H_696_2@


      可以看到，这个打印结果正确无误。如果不加mutex会是什么样的结果呢，我将线程同步的mutex注释掉，输出的结果为：@H_696_2@

      copy
        thread@H_696_2@runsell98
      1. thread@H_696_2@runsell94
      2. thread@H_696_2@gosell94
      3. thread@H_696_2@runsell92
      4. thread@H_696_2@runsell89
      5. thread@H_696_2@gosell88
      6. thread@H_696_2@runsell87
      7. thread@H_696_2@gosell86
      8. thread@H_696_2@gosell84
      9. thread@H_696_2@runsell83
      10. thread@H_696_2@gosell82
      11. thread@H_696_2@runsell81
      12. thread@H_696_2@gosell80
      13. thread@H_696_2@runsell79
      14. thread@H_696_2@runsell75
      15. thread@H_696_2@gosell74
      16. thread@H_696_2@runsell73
      17. thread@H_696_2@gosell72
      18. thread@H_696_2@runsell71
      19. thread@H_696_2@gosell70
      20. thread@H_696_2@runsell68
      21. thread@H_696_2@gosell67
      22. thread@H_696_2@gosell63
      23. thread@H_696_2@runsell62
      24. thread@H_696_2@gosell61
      25. thread@H_696_2@runsell60
      26. thread@H_696_2@runsell58
      27. thread@H_696_2@runsell56
      28. thread@H_696_2@runsell54
      29. thread@H_696_2@gosell52
      30. thread@H_696_2@runsell52
      31. thread@H_696_2@gosell50
      32. thread@H_696_2@runsell50
      33. thread@H_696_2@gosell49
      34. thread@H_696_2@runsell47
      35. thread@H_696_2@gosell47
      36. thread@H_696_2@runsell45
      37. thread@H_696_2@runsell43threadgosell43
      38. thread@H_696_2@gosell41
      39. thread@H_696_2@runsell39
      40. thread@H_696_2@gosell37
      41. thread@H_696_2@gosell35
      42. thread@H_696_2@runsell35
      43. thread@H_696_2@gosell33threadrunsell33
      44. thread@H_696_2@gosell31threadrunsell31
      45. thread@H_696_2@gosell29
      46. thread@H_696_2@runsell29
      47. thread@H_696_2@gosell27
      48. thread@H_696_2@runsell27
      49. thread@H_696_2@gosell25
      50. thread@H_696_2@runsell25
      51. thread@H_696_2@gosell23
      52. thread@H_696_2@runsell21
      53. thread@H_696_2@gosell21
      54. thread@H_696_2@runsell19
      55. thread@H_696_2@gosell17
      56. thread@H_696_2@gosell15
      57. thread@H_696_2@runsell15
      58. thread@H_696_2@runsell13
      59. thread@H_696_2@gosell13
      60. thread@H_696_2@runsell11threadgosell11
      61. thread@H_696_2@gosell9
      62. thread@H_696_2@runsell9
      63. thread@H_696_2@gosell7
      64. thread@H_696_2@gosell5threadrunsell5
      65. thread@H_696_2@runsell3
      66. thread@H_696_2@gosell1
      67. copy
          thread@H_696_2@runsell98@H_696_2@@H_696_2@
        1. thread@H_696_2@runsell94@H_696_2@@H_696_2@
        2. thread@H_696_2@gosell94@H_696_2@@H_696_2@
        3. thread@H_696_2@runsell92@H_696_2@@H_696_2@
        4. thread@H_696_2@runsell89@H_696_2@@H_696_2@
        5. thread@H_696_2@gosell88@H_696_2@@H_696_2@
        6. thread@H_696_2@runsell87@H_696_2@@H_696_2@
        7. thread@H_696_2@gosell86@H_696_2@@H_696_2@
        8. thread@H_696_2@gosell84@H_696_2@@H_696_2@
        9. thread@H_696_2@runsell83@H_696_2@@H_696_2@
        10. thread@H_696_2@gosell82@H_696_2@@H_696_2@
        11. thread@H_696_2@runsell81@H_696_2@@H_696_2@
        12. thread@H_696_2@gosell80@H_696_2@@H_696_2@
        13. thread@H_696_2@runsell79@H_696_2@@H_696_2@
        14. thread@H_696_2@runsell75@H_696_2@@H_696_2@
        15. thread@H_696_2@gosell74@H_696_2@@H_696_2@
        16. thread@H_696_2@runsell73@H_696_2@@H_696_2@
        17. thread@H_696_2@gosell72@H_696_2@@H_696_2@
        18. thread@H_696_2@runsell71@H_696_2@@H_696_2@
        19. thread@H_696_2@gosell70@H_696_2@@H_696_2@
        20. thread@H_696_2@runsell68@H_696_2@@H_696_2@
        21. thread@H_696_2@gosell67@H_696_2@@H_696_2@
        22. thread@H_696_2@gosell63@H_696_2@@H_696_2@
        23. thread@H_696_2@runsell62@H_696_2@@H_696_2@
        24. thread@H_696_2@gosell61@H_696_2@@H_696_2@
        25. thread@H_696_2@runsell60@H_696_2@@H_696_2@
        26. thread@H_696_2@runsell58@H_696_2@@H_696_2@
        27. thread@H_696_2@runsell56@H_696_2@@H_696_2@
        28. thread@H_696_2@runsell54@H_696_2@@H_696_2@
        29. thread@H_696_2@gosell52@H_696_2@@H_696_2@
        30. thread@H_696_2@runsell52@H_696_2@@H_696_2@
        31. thread@H_696_2@gosell50@H_696_2@@H_696_2@
        32. thread@H_696_2@runsell50@H_696_2@@H_696_2@
        33. thread@H_696_2@gosell49@H_696_2@@H_696_2@
        34. thread@H_696_2@runsell47@H_696_2@@H_696_2@
        35. thread@H_696_2@gosell47@H_696_2@@H_696_2@
        36. thread@H_696_2@runsell45@H_696_2@@H_696_2@
        37. thread@H_696_2@runsell43threadgosell43@H_696_2@@H_696_2@
        38. thread@H_696_2@gosell41@H_696_2@@H_696_2@
        39. thread@H_696_2@runsell39@H_696_2@@H_696_2@
        40. thread@H_696_2@gosell37@H_696_2@@H_696_2@
        41. thread@H_696_2@gosell35@H_696_2@@H_696_2@
        42. thread@H_696_2@runsell35@H_696_2@@H_696_2@
        43. thread@H_696_2@gosell33threadrunsell33@H_696_2@@H_696_2@
        44. thread@H_696_2@gosell31threadrunsell31@H_696_2@@H_696_2@
        45. thread@H_696_2@gosell29@H_696_2@@H_696_2@
        46. thread@H_696_2@runsell29@H_696_2@@H_696_2@
        47. thread@H_696_2@gosell27@H_696_2@@H_696_2@
        48. thread@H_696_2@runsell27@H_696_2@@H_696_2@
        49. thread@H_696_2@gosell25@H_696_2@@H_696_2@
        50. thread@H_696_2@runsell25@H_696_2@@H_696_2@
        51. thread@H_696_2@gosell23@H_696_2@@H_696_2@
        52. thread@H_696_2@runsell21@H_696_2@@H_696_2@
        53. thread@H_696_2@gosell21@H_696_2@@H_696_2@
        54. thread@H_696_2@runsell19@H_696_2@@H_696_2@
        55. thread@H_696_2@gosell17@H_696_2@@H_696_2@
        56. thread@H_696_2@gosell15@H_696_2@@H_696_2@
        57. thread@H_696_2@runsell15@H_696_2@@H_696_2@
        58. thread@H_696_2@runsell13@H_696_2@@H_696_2@
        59. thread@H_696_2@gosell13@H_696_2@@H_696_2@
        60. thread@H_696_2@runsell11threadgosell11@H_696_2@@H_696_2@
        61. thread@H_696_2@gosell9@H_696_2@@H_696_2@
        62. thread@H_696_2@runsell9@H_696_2@@H_696_2@
        63. thread@H_696_2@gosell7@H_696_2@@H_696_2@
        64. thread@H_696_2@gosell5threadrunsell5@H_696_2@@H_696_2@
        65. thread@H_696_2@runsell3@H_696_2@@H_696_2@
        66. thread@H_696_2@gosell1@H_696_2@@H_696_2@
        67. thread@H_696_2@runsell1@H_696_2@@H_696_2@


        可以看到，有的票卖了两次，有的票就没卖。@H_696_2@

        4.注意@H_696_2@

        1.Sleep()函数是使得线程休眠的函数，这个函数不跨平台，仅仅在windows上能用，其他平台使用usleep。@H_696_2@

        2.在非主线程中不能使用COcos2d-x管理内存的CCObject::retain(),@H_696_2@CCObject::release()者@H_696_2@CCObject::autorelease()，因为CCAutoreleasePool不是线程安全的，OPENGL的上下文也不是线程安全的，所以不要再非主线程中使用COcos2d-x的API和UI操作。@H_696_2@@H_696_2@@H_696_2@


        @H_696_2@        @H_696_2@@H_696_2@


        cocos2dx内存管理与多线程问题:
        @H_696_2@        @H_696_2@@H_696_2@

        Cocos2d-x的内存管理采用Objective-C的机制，大喜过望。因为只要坚持Objective-C的原则“谁创建谁释放，谁备份谁释放”的原则即可确保内存使用不易出现Bug。@H_696_2@
        @H_829_2620@但是因为本身开放的游戏需要使用到多线程技术，导致测试的时候总是莫名其妙的导致空指针错误。而且是随机出现，纠结了2天无果后，开始怀疑Cocos2d-X的内存本身管理可能存在问题。怀着这样的想法，@H_696_2@@H_18_2622@一步一步的调试，发现经常出现指针异常的变量总是在调用autorelease后一会就莫名其妙再使用的时候就抛异常。狠下心，在它的析构函数里面断点+Log输出信息。发现对象被释放了。一时也很迷糊，因为对象只是@H_696_2@@H_18_2622@autorelease,并没有真正释放，是谁导致它释放的？@H_696_2@
        @H_18_2622@然后就去看了CCAutoreleasePool的源码，发现存在Cocos2d-X的内存管理在多线程的情况下存在如下问题@H_696_2@@H_18_2622@ @H_829_2620@如图：thread 1和thread 2是独立的两个线程，它们之间存在CPU分配的交叉集，我们在time 1的时候push一个autorelease的自动释放池，在该线程的末尾，即time 3的时候pop它。同理在thread 2的线程里面，在time 2的时候push一个自动释放池，在time 4的时候释放它，即Pop.@H_696_2@@H_18_2622@此时我们假设在thread 2分配得到CPU的时候有一个对象obj自动释放，即obj-autorelease().@H_696_2@那么在time 3的时候会发生是么事情呢？@H_696_2@
        答案很简单，就是obj在time 3的时候就被释放了，而我们期望它在time 4的时候才释放。所以就导致我上面说的，在多线程下面，cocos2d-x的autorelease变量会发生莫名其妙的指针异常。@H_696_2@
        解决办法：@H_696_2@@H_829_2620@在PoolManager给每个线程根据pthread_t的线程id生成一个CCArray的stack的嵌套管理自动释放池。源码如下@H_696_2@@H_18_2622@所以我在Push的时候根据当前线程的pthread_t的线程id生成一个CCArray的stack来存储该线程对应的Autoreleasepool的嵌套对象@H_696_2@@H_18_2622@源码如下@H_696_2@

        @H_829_2620@ @H_696_2@@H_696_2@        @H_696_2@@H_696_2@

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        //--------------------------------------------------------------------

        //

        // CCPoolManager

        //

        //--------------------------------------------------------------------


        /////【diff - begin】- by layne//////


        CCPoolManager* CCPoolManager::sharedPoolManager()

        {

        if (s_pPoolManager == NULL)

        {

        s_pPoolManager = new CCPoolManager();

        }

        return s_pPoolManager;

        }


        void CCPoolManager::purgePoolManager()

        {

        CC_SAFE_deletE(s_pPoolManager);

        }


        CCPoolManager::CCPoolManager()

        {

        // m_pReleasePoolStack = new CCArray();

        // m_pReleasePoolStack->init();

        // m_pCurReleasePool = 0;


        m_pReleasePoolMultiStack = new CCDictionary();

        }


        CCPoolManager::~CCPoolManager()

        {


        // finalize();


        // // we only release the last autorelease pool here

        // m_pCurReleasePool = 0;

        // m_pReleasePoolStack->removeObjectATindex(0);

        //

        // CC_SAFE_deletE(m_pReleasePoolStack);


        finalize();


        CC_SAFE_deletE(m_pReleasePoolMultiStack);

        }


        void CCPoolManager::finalize()

        {

        if(m_pReleasePoolMultiStack->count() > 0)

        {

        //CCAutoreleasePool* pReleasePool;

        CCObject* pkey = NULL;

        CCARRAY_FOREACH(m_pReleasePoolMultiStack->allKeys(),pkey)

        {

        if(!pkey)

        break;

        CCInteger *key = (CCInteger*)pkey;

        CCArray *poolStack = (CCArray *)m_pReleasePoolMultiStack->objectForKey(key->getValue());

        CCObject* pObj = NULL;

        CCARRAY_FOREACH(poolStack,pObj)

        {

        if(!pObj)

        break;

        CCAutoreleasePool* pPool = (CCAutoreleasePool*)pObj;

        pPool->clear();

        }

        }

        }

        }


        void CCPoolManager::push()

        {

        // CCAutoreleasePool* pPool = new CCAutoreleasePool(); //ref = 1

        // m_pCurReleasePool = pPool;

        //

        // m_pReleasePoolStack->addObject(pPool); //ref = 2

        //

        // pPool->release(); //ref = 1


        pthread_mutex_lock(&m_muteX);


        CCArray* pCurReleasePoolStack = getCurReleasePoolStack();

        CCAutoreleasePool* pPool = new CCAutoreleasePool(); //ref = 1

        pCurReleasePoolStack->addObject(pPool); //ref = 2

        pPool->release(); //ref = 1


        pthread_mutex_unlock(&m_muteX);

        }


        void CCPoolManager::pop()

        {

        // if (! m_pCurReleasePool)

        // {

        // return;

        // }

        //

        // int nCount = m_pReleasePoolStack->count();

        //

        // m_pCurReleasePool->clear();

        //

        // if(nCount > 1)

        // {

        // m_pReleasePoolStack->removeObjectATindex(nCount-1);

        //

        // // if(nCount > 1)

        // // {

        // // m_pCurReleasePool = m_pReleasePoolStack->objectATindex(nCount - 2);

        // // return;

        // // }

        // m_pCurReleasePool = (CCAutoreleasePool*)m_pReleasePoolStack->objectATindex(nCount - 2);

        // }

        //

        // /*m_pCurReleasePool = NULL;*/


        pthread_mutex_lock(&m_muteX);


        CCArray* pCurReleasePoolStack = getCurReleasePoolStack();

        CCAutoreleasePool* pCurReleasePool = getCurReleasePool();

        if (pCurReleasePoolStack && pCurReleasePool)

        {

        int nCount = pCurReleasePoolStack->count();


        pCurReleasePool->clear();


        if(nCount > 1)

        {

        pCurReleasePoolStack->removeObject(pCurReleasePool);

        }

        }


        pthread_mutex_unlock(&m_muteX);

        }


        void CCPoolManager::removeObject(CCObject* pObject)

        {

        // CCassert(m_pCurReleasePool,"current auto release pool should not be null");

        //

        // m_pCurReleasePool->removeObject(pObject);


        pthread_mutex_lock(&m_muteX);

        CCAutoreleasePool* pCurReleasePool = getCurReleasePool();

        CCassert(pCurReleasePool,"current auto release pool should not be null");


        pCurReleasePool->removeObject(pObject);

        pthread_mutex_unlock(&m_muteX);

        }


        void CCPoolManager::addObject(CCObject* pObject)

        {

        // getCurReleasePool()->addObject(pObject);


        pthread_mutex_lock(&m_muteX);

        CCAutoreleasePool* pCurReleasePool = getCurReleasePool(true);

        CCassert(pCurReleasePool,"current auto release pool should not be null");


        pCurReleasePool->addObject(pObject);

        pthread_mutex_unlock(&m_muteX);

        }


        CCArray* CCPoolManager::getCurReleasePoolStack()

        {

        CCArray* pPoolStack = NULL;

        pthread_t tid = pthread_self();

        if(m_pReleasePoolMultiStack->count() > 0)

        {

        pPoolStack = (CCArray*)m_pReleasePoolMultiStack->objectForKey((int)tid);

        }


        if (!pPoolStack) {

        pPoolStack = new CCArray();

        m_pReleasePoolMultiStack->setObject(pPoolStack,(int)tid);

        pPoolStack->release();

        }


        return pPoolStack;

        }


        CCAutoreleasePool* CCPoolManager::getCurReleasePool(bool auto@R_675_5746@

        {

        // if(!m_pCurReleasePool)

        // {

        // push();

        // }

        //

        // CCassert(m_pCurReleasePool,"current auto release pool should not be null");

        //

        // return m_pCurReleasePool;


        CCAutoreleasePool* pReleasePool = NULL;



        CCArray* pPoolStack = getCurReleasePoolStack();

        if(pPoolStack->count() > 0)

        {

        pReleasePool = (CCAutoreleasePool*)pPoolStack->lastObject();

        }


        if (!pReleasePool && auto@R_675_5746@ {

        CCAutoreleasePool* pPool = new CCAutoreleasePool(); //ref = 1

        pPoolStack->addObject(pPool); //ref = 2

        pPool->release(); //ref = 1


        pReleasePool = pPool;

        }


        return pReleasePool;

        }


        /////【diff - end】- by layne//////



        代码下载地址:https://github.com/Kaitiren/pthread-test-for-cocos2dx

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