[英]PThread - Thread Exiting early despite calling pthread_join
我已經以相當基本的方式實現了PThreads:
#include<iostream>
#include<pthread.h>
#include<stdio.h>
using namespace std;
class ThreadParameter
{
public:
char symbol_char;
int count;
};
void* print_char (void* param)
{
ThreadParameter* p = (ThreadParameter*)param;
for (int i=0; i< p->count; i++)
{
cout<< p->symbol_char <<endl;
i++;
}
return NULL;
}
int main ()
{
pthread_t thread1_id;
ThreadParameter param1;
param1.symbol_char = 'X';
param1.count = 27;
pthread_create (&thread1_id, NULL, &print_char, ¶m1);
int i = 0;
while (i<10)
{
cout<<"O"<<endl;
i++;
}
pthread_join(thread1_id,NULL);
return 0;
}
而且其輸出未顯示預期的X號。我在調用join函數時犯了什么錯誤? 感謝幫助。
PS:我嘗試過從5到20的各種X值,但它總是比期望的X值小。
您在print_char()
i
遞增兩次。
更改
for (int i=0; i< p->count; i++)
{
cout<< p->symbol_char <<endl;
i++;
}
成
for (int i=0; i< p->count; i++)
{
cout<< p->symbol_char <<endl;
}
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