static char *TCPCommand; static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; int SetUpTCPtoSendInformation(char option[], char *command) { pthread_mutex_lock(&mutex); // 加锁 if (strstr(option, "set")) { TCPCommand = malloc(strlen(command) + 1); if (TCPCommand == NULL) { CON_LOG("Failed to set and obtain TCP command variable memory allocation"); goto fail; } strcpy(TCPCommand, command); goto succeed; } else if (strstr(option, "get") && TCPCommand != NULL && strlen(TCPCommand)) { strcpy(command, TCPCommand); memset(TCPCommand, '\0', strlen(TCPCommand)); free(TCPCommand); pthread_mutex_unlock(&mutex); // 解锁 goto succeed; } memset(command, 0, sizeof(command)); strcpy(command, ""); fail: pthread_mutex_unlock(&mutex); // 解锁 return 0; succeed: pthread_mutex_unlock(&mutex); // 解锁 return 1; } 编写一个多进程或多进程调用这个函数
时间: 2024-04-08 08:34:06 浏览: 152
pthread_cond_wait() 用法深入分析
您可以使用多线程来调用`SetUpTCPtoSendInformation`函数。以下是一个示例代码,其中使用了两个线程来调用该函数:
```c
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
static char *TCPCommand;
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
int SetUpTCPtoSendInformation(char option[], char *command) {
pthread_mutex_lock(&mutex); // 加锁
if (strstr(option, "set")) {
TCPCommand = malloc(strlen(command) + 1);
if (TCPCommand == NULL) {
printf("Failed to set and obtain TCP command variable memory allocation\n");
goto fail;
}
strcpy(TCPCommand, command);
goto succeed;
} else if (strstr(option, "get") && TCPCommand != NULL && strlen(TCPCommand)) {
strcpy(command, TCPCommand);
memset(TCPCommand, '\0', strlen(TCPCommand));
free(TCPCommand);
pthread_mutex_unlock(&mutex); // 解锁
goto succeed;
}
memset(command, 0, sizeof(command));
strcpy(command, "");
fail:
pthread_mutex_unlock(&mutex); // 解锁
return 0;
succeed:
pthread_mutex_unlock(&mutex); // 解锁
return 1;
}
void* thread_func(void* arg) {
char option[4];
char command[100];
strcpy(option, "set");
strcpy(command, "Example Command");
SetUpTCPtoSendInformation(option, command);
return NULL;
}
int main() {
pthread_t thread1, thread2;
pthread_create(&thread1, NULL, thread_func, NULL);
pthread_create(&thread2, NULL, thread_func, NULL);
pthread_join(thread1, NULL);
pthread_join(thread2, NULL);
return 0;
}
```
在上面的示例中,`thread_func`函数作为线程的入口点,在每个线程中调用`SetUpTCPtoSendInformation`函数。通过使用`pthread_create`函数创建两个线程,并使用`pthread_join`函数等待线程的完成。
请注意,由于使用了全局变量和互斥锁,线程将共享`TCPCommand`变量,并且在访问和修改该变量时需要进行互斥操作。
阅读全文