Re: Preventing system sleep
Re: Preventing system sleep
- Subject: Re: Preventing system sleep
- From: Laurent Daudelin <email@hidden>
- Date: Tue, 16 Feb 2010 13:25:31 -0800
On Feb 16, 2010, at 13:19, Joe Ranieri wrote:
> On 2/16/10 4:18 PM, Laurent Daudelin wrote:
>> On Feb 16, 2010, at 13:13, Joe Ranieri wrote:
>>
>>> On 2/16/10 4:10 PM, Neil Allain wrote:
>>>>
>>>> On Feb 16, 2010, at 2:57 PM, Laurent Daudelin wrote:
>>>>
>>>>> I'm working on a an app that at some point might start transferring a large file to a USB device. Apparently, if the system is set to go to sleep, the transfer will fail.
>>>>>
>>>>> I was thinking of using the NSWorkspace extendPowerOffBy: but then the doc says "Currently unimplemented".
>>>>>
>>>>> So, if my app get a notification that the system is going to sleep, how can I delay it?
>>>>>
>>>>
>>>> You can call UpdateSystemActivity() periodically (such as on a timer) to prevent it from going to sleep.
>>>>
>>>> Neil
>>>
>>> You should probably be using IOPMAssertionCreateWithName() instead if you can require 10.5+. This gives the system a lot more information about the intent of your code and the potential ability to show some nice UI to the user.
>>
>> Oops! The doc says it was introduced in 10.6 and I need to support 10.5. I guess I'll have to check "IOPMAssertionCreate"...
>>
>> Thanks!
>
> Curious. The header file says:
> IOReturn IOPMAssertionCreateWithName(
> CFStringRef AssertionType,
> IOPMAssertionLevel AssertionLevel,
> CFStringRef AssertionName,
> IOPMAssertionID *AssertionID) AVAILABLE_MAC_OS_X_VERSION_10_5_AND_LATER;
>
> Is the header wrong?
>
> -- Joe Ranieri
I'll give it a shot and see. Should find out pretty quickly...
-Laurent.
--
Laurent Daudelin
AIM/iChat/Skype:LaurentDaudelin http://nemesys.dyndns.org
Logiciels Nemesys Software email@hidden
Photo Gallery Store: http://laurentdaudelin.shutterbugstorefront.com/g/galleries
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden