vc++深入详解中的多线程例子，在多核CPU下出错分析。该怎么解决

vc++深入详解中的多线程例子，在多核CPU下出错分析。

C/C++ code

#include <WINDOWS.H>#include <IOSTREAM>using namespace std;/* * 在单核单CPU下正常运行 */DWORD WINAPI Fun1Proc(LPVOID lpParameter);DWORD WINAPI Fun2Proc(LPVOID lpParameter);int tickets = 100;HANDLE g_hEvent;void main(){    HANDLE hThread1,hThread2;    hThread1 = CreateThread(NULL,0,Fun1Proc,NULL,0,NULL);    hThread2 = CreateThread(NULL,0,Fun2Proc,NULL,0,NULL);    CloseHandle(hThread1);    CloseHandle(hThread2);        g_hEvent = CreateEvent(NULL,FALSE,FALSE,NULL);    SetEvent(g_hEvent);    Sleep(4000);    CloseHandle(g_hEvent);}DWORD WINAPI Fun1Proc(LPVOID lpParameter){    while(TRUE)    {        WaitForSingleObject(g_hEvent,INFINITE);        //ResetEvent(g_hEvent);        if (tickets > 0)        {            Sleep(1);            cout<<"Thread1 sell ticket:"<<tickets--<<endl;        }        else            break;        SetEvent(g_hEvent);    }    return 0;}DWORD WINAPI Fun2Proc(LPVOID lpParameter){    while(TRUE)    {        WaitForSingleObject(g_hEvent,INFINITE);        //ResetEvent(g_hEvent);        if (tickets > 0)        {            Sleep(1);            cout<<"Thread2 sell ticket:"<<tickets--<<endl;        }        else            break;        SetEvent(g_hEvent);    }    return 0;}

在多核cpu下运行结果出错。执行结果如下：


Thread1 sell ticTkherte:ad120 0s
ell ticket:99
Thread1 sell tickTehtr:e9a8d
2 sell ticket:97
Thread1 sell tickeTth:r9e6a
d2 sell ticket:95
Thread1 sell ticket:94
Thread2 sell tickeTth:r93e
ad1 sell ticket:92
Thread2 sell tickTehtr:e9a1d
1 sell ticket:90
Thread2 sell ticket:8T9
hread1 sell ticket:88
Thread2 sell tickTehtr:e8a7d
1 sell ticket:86
Thread2 sell tickTehtr:e8a5d1
 sell ticket:84
TThhrreeaadd12 sseellll ttiicckkeett::8832

TThhrreeada1d 2s eslell lt iticckkeett::8810

TThhreraeda1d 2s eslell lt itcikcekte:t7:97
8
TThhrreeaadd12 sseellll ttiicckkeett::7776

Thread1 sell tickeTth:r7e5a
d2 sell ticket:74
Thread1 sell ticket:73
Thread2 sell ticket:72
Thread1 sell tickeTth:r7e1a
d2 sell ticket:70
Thread1 sell ticket:69
Thread2 sell ticket:68
Thread1 sell tickeTth:r6e7a
d2 sell ticket:66
Thread1 sell ticket:65
Thread2 sell ticket:64
Thread1 sellT htriecakd2e ts:e6l3l
 ticket:62
TThhrreeaadd12 sseellll ttiicckkeett::6610

Thread1 sell tickTehtr:e5a9d
2 sell ticket:58
Thread1 sell ticket:57
Thread2 sell ticket:56
Thread1 sell ticket:55
Thread2 sell ticketT:h5r4
ead1 sell ticket:53
Thread2 sell ticket:52
Thread1 sell tickeTth:r5e1a
d2 sell ticket:50
Thread1 sell ticket:49
Thread2 sell ticket:48
Thread1 sell ticket:47
Thread2 sell ticket:46T
hread1 sell ticket:45
Thread2 sell tickTehtr:e4a4d
1 sell ticket:43
Thread2 sell ticket:42
Thread1 sell tickTehtr:e4a1d
2 sell ticket:40
Thread1 sell ticket:39
Thread2 sell ticket:38
Thread1 sell ticketT:h3r7e
ad2 sell ticket:36
Thread1 sell ticket:35
Thread2 sell tickTehtr:e3a4d
1 sell ticket:33
Thread2 sell tickTehtr:e3a2d
1 sell ticket:31
Thread2 sell ticket:30
Thread1 sell ticket:29
Thread2 sell ticket:28
Thread1 sell ticket:27
Thread2 sell tickeTth:r2e6a
d1 sell ticket:25
Thread2 sell ticket:24
Thread1 sell ticket:23
Thread2 sell tickTehtr:e2a2d
1 sell ticket:21
Thread2 sell ticket:20
Thread1 sell ticket:19
Thread2 sell ticket:T1h8r
ead1 sell ticket:17
Thread2 sell ticket:16
Thread1 sell tickeTth:r1e5a
d2 sell ticket:14
Thread1 sell ticket:13
Thread2 sell ticket:1T2h
read1 sell ticket:11
Thread2 sell ticket:10

Thread1 sell ticket:9
Thread2 sell ticket:8
Thread1 sell ticket:Th7r
ead2 sell ticket:6
Thread1 sell ticket:5
Thread2 sell ticket:Th4re
ad1 sell ticket:3
Thread2 sell ticket:2
Thread1 sell ticket:Thr1e
ad2 sell ticket:0
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结果分析，在运行线程时g_hEvent可能未创建。

代码改为如下变正常了。

C/C++ code

#include <WINDOWS.H>#include <IOSTREAM>using namespace std;/* * 在单核单CPU下正常运行 */DWORD WINAPI Fun1Proc(LPVOID lpParameter);DWORD WINAPI Fun2Proc(LPVOID lpParameter);int tickets = 100;HANDLE g_hEvent;void main(){    g_hEvent = CreateEvent(NULL,FALSE,FALSE,NULL);    SetEvent(g_hEvent);    HANDLE hThread1,hThread2;    hThread1 = CreateThread(NULL,0,Fun1Proc,NULL,0,NULL);    hThread2 = CreateThread(NULL,0,Fun2Proc,NULL,0,NULL);    CloseHandle(hThread1);    CloseHandle(hThread2);        //g_hEvent = CreateEvent(NULL,FALSE,FALSE,NULL);    //SetEvent(g_hEvent);    Sleep(4000);    CloseHandle(g_hEvent);}DWORD WINAPI Fun1Proc(LPVOID lpParameter){    while(TRUE)    {        WaitForSingleObject(g_hEvent,INFINITE);        //ResetEvent(g_hEvent);        if (tickets > 0)        {            Sleep(1);            cout<<"Thread1 sell ticket:"<<tickets--<<endl;        }        else            break;        SetEvent(g_hEvent);    }    return 0;}DWORD WINAPI Fun2Proc(LPVOID lpParameter){    while(TRUE)    {        WaitForSingleObject(g_hEvent,INFINITE);        //ResetEvent(g_hEvent);        if (tickets > 0)        {            Sleep(1);            cout<<"Thread2 sell ticket:"<<tickets--<<endl;        }        else            break;        SetEvent(g_hEvent);    }    return 0;}

经测试正常了。

这个分析对吗





[解决办法]
楼主用的什么编译器？VC6这个垃圾货？
[解决办法]
珍惜生命，远离VC6.
不要用它来浪费大家的时间了。

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