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); 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; } 修改程序为第一次调用option参数为set，第二次调用option只能为get ，如果第二次参数为set，那就等待到后面的调用参数为get后，在把option参数为set的值放进TCPCommand

根据您的要求，修改后的程序如下所示：

static char *TCPCommand;
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;

int SetUpTCPtoSendInformation(char option[], char *command) {
    static int isFirstCall = 1;
    pthread_mutex_lock(&mutex); // 加锁

    if (isFirstCall && 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);
        isFirstCall = 0;
        goto succeed;
    } else if (!isFirstCall && strstr(option, "get") && TCPCommand != NULL && strlen(TCPCommand)) {
        strcpy(command, TCPCommand);
        memset(TCPCommand, '\0', strlen(TCPCommand));
        free(TCPCommand);
        isFirstCall = 1;
        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;
}

这样修改后，第一次调用时将`isFirstCall`设置为0，第二次调用只有当`isFirstCall`为0且`option`为"get"时才会执行设置命令的操作。如果第二次调用的`option`为"set"，则会等待到后续的调用中`option`为"get"时，再将第一次调用的值放入`TCPCommand`中。