typedef struct channeluser {
	user* user;
	struct channel* channel;
	char* channel_mode;
	struct channeluser* next;
} channeluser;

typedef struct channel {
	char* name;
	struct channeluser* channeluser_list;
	char* mode;
	char* topic;
	struct channel* next;
} channel;

extern channel* channel_list;

extern pthread_mutex_t channel_lock; //lock for accessing channel-related data