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如何给线程函数 beginthread 和 pthread_create 传递参数

1. 传递单个参数:直接传递指向参数的指针。


/*----------------------- beginthread.c ----------------------------*/
#include <process.h>

void doubleNum(void* arg)
{
 int *arg=(int*)arg;
 *arg=(*arg)*2;
}
void main()
{
 int arg = 0;
 _beginthread(doubleNum,0,(void*)&arg);
}
/*----------------------- pthread_create.c ----------------------------*/
#include <pthread.h>

void doubleNum(void* arg)
{
 int *arg=(int*)arg;
 *arg=(*arg)*2;
}
void main()
{
 int arg = 0;
 pthread_t thread;
 pthread_create(&thread,  0, doubleNum, (void*)&arg);
 pthread_join(thread, NULL);
}

2.  传递多个参数:定义一个包含所有参数的结构体,传递指向结构体的指针。

 

/*----------------------- StructAndFunc.h ----------------------------*/

#include <stdio.h>
struct threadparam
{
 int *arg1;
 char[5] arg2;
}
void doubleNum(void* arg)
{
 int *arg1=(threadparam*)arg->arg1;
 char *arg2=(threadparam*)arg->arg2;
 printf("integer: %d char array: %s \n", *arg1, arg2);
}

/*----------------------- beginthread.c ----------------------------*/
#include <process.h>
#include <StructAndFunc.h>
void main()
{
 int integer= 5;
 char[5] array={a,b,c,d,e};
 threadparam* param=new threadparam();
 param->arg1=&interger;
 param->arg2=array;
 HANDLE m_hThread = (HANDLE)_beginthread(doubleNum,0,(void*)threadparam);
}
/*----------------------- pthread_create.c ----------------------------*/
#include <pthread.h>
#include <StructAndFunc.h>
void main()
{
 int integer= 5;
 char[5] array={a,b,c,d,e};
 threadparam* param=new threadparam();
 param->arg1=&interger;
 param->arg2=array;
 pthread_t thread;
 pthread_create(&thread,  0, doubleNum, (void*)param);
 pthread_join(thread, NULL);
}
ps,以上代码未进行测试,可能会存在一些语法小错误。

补充:软件开发 , C++ ,
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