linux操作系统银行家算法模拟实验
时间: 2023-12-12 14:35:56 浏览: 39
银行家算法是一种死锁避免算法,用于管理多个进程对有限数量的资源的请求。在Linux操作系统中,可以使用C语言编写程序来模拟银行家算法。
以下是Linux操作系统银行家算法模拟实验的步骤:
1. 安装VM软件并安装Linux系统。
2. 使用C语言编写银行家算法程序。
3. 编译程序并运行。
4. 输入进程数、资源数、每个进程所需的资源数和每个进程已分配的资源数。
5. 程序将输出每个进程的状态(安全或不安全)以及安全序列(如果存在)。
以下是一个简单的银行家算法程序示例:
```c
#include <stdio.h>
#include <stdbool.h>
#define MAX_PROCESS 10
#define MAX_RESOURCE 10
int available[MAX_RESOURCE];
int max[MAX_PROCESS][MAX_RESOURCE];
int allocation[MAX_PROCESS][MAX_RESOURCE];
int need[MAX_PROCESS][MAX_RESOURCE];
bool finish[MAX_PROCESS];
int main() {
int n, m;
printf("Enter the number of processes: ");
scanf("%d", &n);
printf("Enter the number of resources: ");
scanf("%d", &m);
// 输入available数组
printf("Enter the available resources: ");
for (int i = 0; i < m; i++) {
scanf("%d", &available[i]);
}
// 输入max数组
printf("Enter the maximum resources for each process: ");
for (int i = 0; i < n; i++) {
for (int j = 0; j < m; j++) {
scanf("%d", &max[i][j]);
}
}
// 输入allocation数组
printf("Enter the allocated resources for each process: ");
for (int i = 0; i < n; i++) {
for (int j = 0; j < m; j++) {
scanf("%d", &allocation[i][j]);
need[i][j] = max[i][j] - allocation[i][j];
}
}
// 初始化finish数组
for (int i = 0; i < n; i++) {
finish[i] = false;
}
// 银行家算法
int work[MAX_RESOURCE];
for (int i = 0; i < m; i++) {
work[i] = available[i];
}
int safe_sequence[MAX_PROCESS];
int count = 0;
while (count < n) {
bool found = false;
for (int i = 0; i < n; i++) {
if (!finish[i]) {
bool enough = true;
for (int j = 0; j < m; j++) {
if (need[i][j] > work[j]) {
enough = false;
break;
}
}
if (enough) {
for (int j = 0; j < m; j++) {
work[j] += allocation[i][j];
}
finish[i] = true;
safe_sequence[count] = i;
count++;
found = true;
}
}
}
if (!found) {
printf("Unsafe state\n");
return 0;
}
}
printf("Safe state, safe sequence: ");
for (int i = 0; i < n; i++) {
printf("%d ", safe_sequence[i]);
}
printf("\n");
return 0;
}
```