/*
功能：改变所有设备的power state
参数：
newState 设备将要达到的power state
context 函数体中木有用到。。。。。？？？？？
返回：0 __flase 失败
1 __true 成功
*/
static __bool PMC_API _power_callback(int newState, int context)
{
PDEVICE_INFO dev;
DEVICE_LIST::iterator it;
PDRIVER_INFO drv;
IOSS_STATUS code;
//遍历设备列表中的所有设备
for(it = g_Devices.begin(); it != g_Devices.end(); it++){
dev = it->second;//设备信息
drv = dev->d;//驱动信息
//调用驱动dll导出函数改变power state
if( (dev->flags & DF_Active) && (drv->dispatch)){
code = drv->dispatch(dev, DISP_POWER_STATE_CHANGED, newState);
if(code){
utils_error(
"Error : device %s vetoed `power-state-changed' command,"
"error code 0x%08x.\n"
"This may cause unpredictable result.\n",
(char*)CDeviceName(dev->k),
code
);
return __false;
}
}
}
return __true;
}
void detach_tag_from_device(PRTK_TAG tag)
{
PDRIVER_INFO drv;
// TODO: notify the device we're depriving this tag
if(tag->d.DeviceObj){
drv = tag->d.DeviceObj->d;
if(drv && drv->dispatch){
drv->dispatch(tag->d.DeviceObj, DISP_DB_DROP_TAG, (int)tag);
}
// detach tag from the old device
RtkRemoveEntryList(&tag->d.DeviceLink);
RtkInitializeListHead(&tag->d.DeviceLink);
}else{
assert(RtkIsListEmpty(&tag->d.DeviceLink));
}
tag->d.DeviceObj = 0;
}