c++ - C语言 如何调用 pthread_create 里函数的参数?

问题描述

1.使用pthread，调用的函数的参数是class中的，该如何处理?

#include<Windows.h>#include <pthread.h> #include<stdlib.h>#include <time.h>#include<stdio.h>#include<conio.h>#define KEY_UP ’w’#define KEY_DOWN ’s’#define KEY_LEFT ’a’#define KEY_RIGHT ’d’ #define FIRE ’j’ class Player {private: int positionX; int positionY; int positionA; int positionB;public: void SetPositionX(int x) { positionX = x; } void SetPositionY(int y) { positionY = y; } int GetPositionX() { return positionX; } int GetPositionY() { return positionY; } int m, n; //子弹坐标};void SetPosition(int x, int y) { COORD coord; coord.X = 2 * x; coord.Y = y; HANDLE handle; handle = GetStdHandle(STD_OUTPUT_HANDLE); SetConsoleCursorPosition(handle,coord); HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE); CONSOLE_CURSOR_INFO cursor_info = {1, 0}; SetConsoleCursorInfo(GetStdHandle(STD_OUTPUT_HANDLE), &cursor_info);}void *Controller(Player &pl) { int direction; if (_kbhit()) { //_kbhit()为true当且仅当用户按下键盘switch (_getch()) { //_getch()返回用户按下的那个按键，注意使用小写 //根据玩家的输入进行移动case KEY_UP: if (pl.GetPositionY() == 1 ) { break; } else {SetPosition(pl.GetPositionX(), pl.GetPositionY());printf(' '); pl.SetPositionY(pl.GetPositionY() - 1); //SetPosition(pl.GetPositionX(), pl.GetPositionY()); //改变光标位置到改变后的位置printf('○'); //进行玩家的移动direction = 1; } break;case KEY_DOWN: if (pl.GetPositionY() == 21 ) { break; } else {SetPosition(pl.GetPositionX(), pl.GetPositionY());printf(' ');pl.SetPositionY(pl.GetPositionY() + 1);SetPosition(pl.GetPositionX(), pl.GetPositionY());printf('○');direction = 2; } break;case KEY_LEFT: if (pl.GetPositionX() == 1 ) { break; } else {SetPosition(pl.GetPositionX(), pl.GetPositionY());printf(' ');pl.SetPositionX(pl.GetPositionX() - 1);SetPosition(pl.GetPositionX(), pl.GetPositionY());printf('○');direction = 3; } break;case KEY_RIGHT: if (pl.GetPositionX() == 37 ) { break; } else {SetPosition(pl.GetPositionX(), pl.GetPositionY());printf(' ');pl.SetPositionX(pl.GetPositionX() + 1);SetPosition(pl.GetPositionX(), pl.GetPositionY());printf('○');direction = 4; } break;default:break;} }}int main(){ int pth1, loop01; pthread_t threads; Player player, enemy; //声明一个自定义的玩家类型变量 srand((unsigned)time(NULL)); player.SetPositionX(rand()%30+2); player.SetPositionY(rand()%15+2); //设置初始坐标 enemy.SetPositionX(rand()%30+2); enemy.SetPositionY(rand()%15+2); while (1) //游戏循环 { //问题在此pth1 = pthread_create(&threads, NULL, Controller, (void*)Player &player); } //参数该如何调用? system('pause'); return 0;}

3.报错如下

E:WorkspaceCGame testproblem.cpp: In function ’int main()’:E:WorkspaceCGame testproblem.cpp:119:67: error: expected primary-expressionbefore ’&’ token pth1 = pthread_create(&threads, NULL, Controller, (void*)Player &player); ^

问题解答

void *Controller(void* p) { Player &pl = *(Player*)p; ...}int main(){ ...pth1 = pthread_create(&threads, NULL, Controller, (void*)&player);...}

在我这能通过编译，不过有点丑

pth1 = pthread_create(&threads, NULL, Controller, &player);