LinuxÉ豸ģÐÍÖ®input×ÓϵͳÏê½â(¶þ)
; break;
}
if (type != EV_SYN)
dev->sync = 0;
if ((disposition & INPUT_PASS_TO_DEVICE) && dev->event)
dev->event(dev, type, code, value);
if (disposition & INPUT_PASS_TO_HANDLERS)
input_pass_event (dev, type, code, value);
}
ÔÚÕâÀï,ÎÒÃǺöÂÔµô¾ßÌåʼþµÄ´¦Àí.µ½×îºó,Èç¹û¸ÃʼþÐèÒªinput deviceÀ´Íê³ÉµÄ,¾Í»á½«dispositionÉèÖóÉINPUT_PASS_TO_DEVICE.Èç¹ûÐèÒªhandlerÀ´Íê³ÉµÄ,¾Í½«dispostionÉèΪINPUT_PASS_TO_DEVICE.Èç¹ûÐèÒªÁ½Õß¶¼²ÎÓë,½«dispositionÉèÖÃΪINPUT_PASS_TO_ALL.
ÐèÒªÊäÈëÉ豸²ÎÓëµÄ,»Øµ÷É豸µÄeventº¯Êý.Èç¹ûÐèÒªhandler²ÎÓëµÄ.µ÷ÓÃinput_pass_event().´úÂëÈçÏÂ:
static void input_pass_event(struct input_dev *dev,
unsigned int type, unsigned int code, int value)
{
struct input_handle *handle;
rcu_read_lock();
handle = rcu_dereference(dev->grab);
if (handle)
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