我的事件手势SDL C有问题

我用c语言开发了一个游戏，使用SDL。 在我的主循环中，当一个用户按下一个键时，它会处理多次，我希望在键入时能及时处理它。 我不知道如何解决这个问题 理想情况下，我想限制此事件每5秒一次，例如。我怎么能做到

这是我的事件文件

事件h

    #ifndef __EVENT_H__
    #define __EVENT_H__

#include <SDL/SDL.h>

typedef struct s_event
{
    int mouse_x;
    int mouse_y;
    char    key[SDLK_LAST];
    char    mouse_buttons[8];
    int quit;

}               t_event;

void    loop_events(t_event *input_manager);
void    switcher(SDL_Event *event, t_event *input_manager);
void    event_initialize(t_event *input_manager);


#endif

我的游戏循环

while(!event.key[SDLK_ESCAPE] && !event.quit)
  {
   loop_events(&event);
   move_player(player, &event, world);
   display_world(world, screen);
   fire(player, &event, screen);

   display_player(screen, player, world);
   SDL_Delay(5);
   SDL_Flip(screen);
  }

当我输入时，我想在其中处理一次事件的函数

void  fire(t_player *player, t_event *event,  SDL_Surface *screen)
{

  if (event->key[SDLK_SPACE])
  {
    if (count_list(player->weapon_data) == 0)
       weapon_id_counter = 0; 
      t_weapon *new;
       new = malloc(sizeof(t_weapon));
       new->on_launch = bitmap_loader("resources/kirby.bmp");
       new->shape.x = player->shape.x;
       new->shape.y = player->shape.y - player->shape.h;
       new->shape.w = 32;
       new->shape.h = 32;
       printf("FIRRRE");
       new->is_launch = 1;
       new->id =weapon_id_counter++;
       player->weapon_data = add_weapon(new, player->weapon_data);
  }
}

---

第一次按键时，保存当前时间。然后，如果在时间限制之前再次按下，则要么显示错误消息，要么干脆忽略该键

如果时间限制已过，则保存当前时间以供下次检查

void  fire(t_player *player, t_event *event,  SDL_Surface *screen)
{

  if (event->key[SDLK_SPACE])
  {
    if (count_list(player->weapon_data) == 0)
       weapon_id_counter = 0; 
      t_weapon *new;
       new = malloc(sizeof(t_weapon));
       new->on_launch = bitmap_loader("resources/kirby.bmp");
       new->shape.x = player->shape.x;
       new->shape.y = player->shape.y - player->shape.h;
       new->shape.w = 32;
       new->shape.h = 32;
       printf("FIRRRE");
       new->is_launch = 1;
       new->id =weapon_id_counter++;
       player->weapon_data = add_weapon(new, player->weapon_data);
  }
}