pthread的（POSIX线程）在Visual Studio 2010 [英] pthread ( POSIX Threads) in visual studio 2010
问题描述
我发现从互联网上的Pthread程序，我想在Visual Studio 2010中运行它，但我不知道如何在Visual Studio中使用的pthread。下面是我发现的程序：
I have found a Pthread program from internet and i want to run it in visual studio 2010 but I dont know how can use pthread in visual studio. the following is the program which I found:
#include <stdio.h>
#include <stdlib.h>
#define MAX_SIZE 4096
#define NO_PROCESS 8
typedef double matrix[MAX_SIZE][MAX_SIZE];
int N; /* matrix size */
int maxnum; /* max number of element*/
char *Init; /* matrix init type */
int PRINT; /* print switch */
matrix A; /* matrix A */
double b[MAX_SIZE]; /* vector b */
double y[MAX_SIZE]; /* vector y */
pthread_barrier_t barrier;
/* forward declarations */
void work(void*);
void Init_Matrix(void);
void Print_Matrix(void);
void Init_Default(void);
int Read_Options(int, char **);
int main(int argc, char **argv)
{
pthread_t threads[NO_PROCESS];
int timestart, timeend, iter;
long i;
Init_Default(); /* Init default values */
Read_Options(argc, argv); /* Read arguments */
Init_Matrix(); /* Init the matrix */
pthread_barrier_init(&barrier, NULL, NO_PROCESS);
for (i = 0; i < NO_PROCESS; i++)
pthread_create (&threads[i], NULL, (void *) &work, (void *) i);
for (i = 0; i < NO_PROCESS; i++)
pthread_join(threads[i], NULL);
pthread_barrier_destroy(&barrier);
if (PRINT == 1)
Print_Matrix();
}
void work(void *pId)
{
int i, j, k;
long thread_id = (long)pId;
/* Gaussian elimination algorithm */
for (k = 0; k < N; k++)
{ /* Outer loop */
if (thread_id == (k % NO_PROCESS))
{
for (j = k + 1;(j < N); j++)
A[k][j] = A[k][j] / A[k][k]; /* Division step */
y[k] = b[k] / A[k][k];
A[k][k] = 1.0;
}
pthread_barrier_wait(&barrier); /* wait for other threads finishing this round */
for (i = k + 1;(i < N); i++)
{
if (thread_id == (i % NO_PROCESS))
{
for (j = k + 1;(j < N); j++)
A[i][j] = A[i][j] - A[i][k] * A[k][j]; /* Elimination step */
b[i] = b[i] - A[i][k] * y[k];
A[i][k] = 0.0;
}
}
pthread_barrier_wait(&barrier); /* wait for other threads finishing this round */
}
}
void Init_Matrix()
{
int i, j;
printf("\nsize = %dx%d ", N, N);
printf("\nmaxnum = %d \n", maxnum);
printf("Init = %s \n", Init);
printf("Initializing matrix...");
if (strcmp(Init, "rand") == 0)
{
for (i = 0; i < N; i++)
{
for (j = 0; j < N; j++)
{
if (i == j) /* diagonal dominance */
A[i][j] = (double)(rand() % maxnum) + 5.0;
else
A[i][j] = (double)(rand() % maxnum) + 1.0;
}
}
}
if (strcmp(Init, "fast") == 0)
{
for (i = 0; i < N; i++)
{
for (j = 0; j < N; j++)
{
if (i == j) /* diagonal dominance */
A[i][j] = 5.0;
else
A[i][j] = 2.0;
}
}
}
/* Initialize vectors b and y */
for (i = 0; i < N; i++)
{
b[i] = 2.0;
y[i] = 1.0;
}
printf("done \n\n");
if (PRINT == 1)
Print_Matrix();
}
void Print_Matrix()
{
int i, j;
printf("Matrix A:\n");
for (i = 0; i < N; i++)
{
printf("[");
for (j = 0; j < N; j++)
printf(" %5.2f,", A[i][j]);
printf("]\n");
}
printf("Vector b:\n[");
for (j = 0; j < N; j++)
printf(" %5.2f,", b[j]);
printf("]\n");
printf("Vector y:\n[");
for (j = 0; j < N; j++)
printf(" %5.2f,", y[j]);
printf("]\n");
printf("\n\n");
}
void Init_Default()
{
N = 2048;
Init = "rand";
maxnum = 15.0;
PRINT = 0;
}
int Read_Options(int argc, char **argv)
{
char *prog;
prog = *argv;
while (++argv, --argc > 0)
if (**argv == '-')
switch ( *++*argv )
{
case 'n':
--argc;
N = atoi(*++argv);
break;
case 'h':
printf("\nHELP: try sor -u \n\n");
exit(0);
break;
case 'u':
printf("\nUsage: sor [-n problemsize]\n");
printf(" [-D] show default values \n");
printf(" [-h] help \n");
printf(" [-I init_type] fast/rand \n");
printf(" [-m maxnum] max random no \n");
printf(" [-P print_switch] 0/1 \n");
exit(0);
break;
case 'D':
printf("\nDefault: n = %d ", N);
printf("\n Init = rand" );
printf("\n maxnum = 5 ");
printf("\n P = 0 \n\n");
exit(0);
break;
case 'I':
--argc;
Init = *++argv;
break;
case 'm':
--argc;
maxnum = atoi(*++argv);
break;
case 'P':
--argc;
PRINT = atoi(*++argv);
break;
default:
printf("%s: ignored option: -%s\n", prog, *argv);
printf("HELP: try %s -u \n\n", prog);
break;
}
}
谁能告诉我如何在Visual Studio中运行它。我知道应该包含一些头，但我不知道该怎么做。
Can anybody tell me how to run it in visual studio. I know there should be included some header, but i dont know how to do it.
请让我知道，从开始到结束一步一步来。我在编程初学者请告诉我一步一步...
Please let me know from start until end step by step. I am a beginner in programming please tell me step by step...
推荐答案
现在，你有你的程序编译，需要在两个地方之一查找特定DLL（pthreadVC2.dll）：
Now that you've got your program compiled, you need to locate the specific dll (pthreadVC2.dll) in one of two places:
- 1）同一个目录中的.exe文件位于
OR - 2）C：\\ Windows \\ System32下（如果你的操作系统是32位Windows版本）
OR - 2）C：\\ WINDOWS \\ Syswow64资料（如果你的操作系统是一个64位Windows版本）
说真的，C：\\ WINDOWS在上面的例子应该是你的Windows安装到实际的路径，有时这也被拼写为％WINDIR％\\ SYSTEM32或％WINDIR％\\ Syswow64资料
Really, the "C:\Windows" in the above examples should be the actual path your windows is installed to, sometimes this is spelled out as %windir%\system32 or %windir%\SysWOW64
这篇关于pthread的（POSIX线程）在Visual Studio 2010的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
