On Jun 30, 2011, at 6:39 PM, Kyle Sluder wrote:
On Thu, Jun 30, 2011 at 6:34 PM, James Merkel
wrote:
Then wherever I was sending the -release, I need to also send a
separate
-close. it could be before or after the release, it doesn't really
matter.
No, it really needs to be before the
On Thu, Jun 30, 2011 at 6:34 PM, James Merkel wrote:
> Then wherever I was sending the -release, I need to also send a separate
> -close. it could be before or after the release, it doesn't really matter.
No, it really needs to be before the -release. When you call -release,
you relinquish your
Not to beat this subject to death, but I just realized that what Kyle
Sluder and Wlm Lewis were saying is very easy to implement.
All I need is a method that just closes the file -- one line of code.
Then wherever I was sending the -release, I need to also send a
separate -close. it could be
On Jun 30, 2011, at 3:33 PM, James Merkel wrote:
> So, my guess is that when Instruments shows an FD of -1 it refers to an FD
> that isn't mine.
What the File Activity instrument is showing in its event list is a certain
subset of system calls which operate on file descriptors. It is showing
Jeffrey Walton wrote:
Wikipedia is hardly the definitive reference. SEO comes to mind.
Luckily, I didn't say Wikipedia was a definitive reference. I said
"useful reference". And anyone at all familiar with it knows full
well that its accuracy (and usefulness) can vary widely. I, for one
On Thu, Jun 30, 2011 at 7:06 PM, Greg Guerin wrote:
> James Merkel wrote:
>
>> Everyone doesn't approach this stuff with the same background.
>> We find from Kernighan and Ritchie (K&R) second edition, section 8.1 that
>> a file descriptor is a small non-negative integer that refers to a file and
James Merkel wrote:
Everyone doesn't approach this stuff with the same background.
We find from Kernighan and Ritchie (K&R) second edition, section
8.1 that a file descriptor is a small non-negative integer that
refers to a file and is maintained by the system.
Wikipedia is also a useful r
On Jun 30, 2011, at 1:33 PM, James Merkel wrote:
> We find from Kernighan and Ritchie (K&R) second edition, section 8.1 that a
> file descriptor is a small non-negative integer that refers to a file and is
> maintained by the system.
Actually file descriptors are used for any sort of I/O chann
On 2011 Jun 30, at 13:33, James Merkel wrote:
> I'm not sure where I would do that [-invalidate, releaseResources,
> removeObservers, whatever]
That's a common dilemma. There is no general solution. Each situation will
have its own least-worst solution.
> Apple could have helped things alon
On Jun 30, 2011, at 12:21 PM, Kyle Sluder wrote:
On Thu, Jun 30, 2011 at 12:12 PM, James Merkel
wrote:
Ok, I don't know what an -invalidate method is, but I'll look it up.
It's the thing Wim talked about. An explicit way to release the scarce
resource you're holding on to. Depending on wha
On Thu, Jun 30, 2011 at 12:12 PM, James Merkel wrote:
> Ok, I don't know what an -invalidate method is, but I'll look it up.
It's the thing Wim talked about. An explicit way to release the scarce
resource you're holding on to. Depending on what that resource is, an
appropriate name might be -clos
On Jun 30, 2011, at 12:04 PM, Kyle Sluder wrote:
On Thu, Jun 30, 2011 at 9:20 AM, James Merkel
wrote:
After a fair amount of application warm-up the FD
shows 25 to 26. So, I assume I'm ok.
And what happens when (not if) you introduce a leak, and these objects
live longer than you expect th
On Thu, Jun 30, 2011 at 9:20 AM, James Merkel wrote:
> After a fair amount of application warm-up the FD
> shows 25 to 26. So, I assume I'm ok.
And what happens when (not if) you introduce a leak, and these objects
live longer than you expect them to? Or worse, someone else starts
holding on to t
On Jun 30, 2011, at 9:20 AM, James Merkel wrote:
On Jun 30, 2011, at 2:01 AM, Ken Thomases wrote:
On Jun 30, 2011, at 3:02 AM, Jean-Daniel Dupas wrote:
Le 30 juin 2011 à 08:19, James Merkel a écrit :
Ok, I'm looking at my application in Instruments File Activity.
The column labeled FD I
On Jun 30, 2011, at 2:01 AM, Ken Thomases wrote:
On Jun 30, 2011, at 3:02 AM, Jean-Daniel Dupas wrote:
Le 30 juin 2011 à 08:19, James Merkel a écrit :
Ok, I'm looking at my application in Instruments File Activity.
The column labeled FD I assume means file descriptors. Is that the
total
On Jun 30, 2011, at 3:02 AM, Jean-Daniel Dupas wrote:
> Le 30 juin 2011 à 08:19, James Merkel a écrit :
>
>> Ok, I'm looking at my application in Instruments File Activity. The column
>> labeled FD I assume means file descriptors. Is that the total number of FDs
>> in use at any given time?
>
Le 30 juin 2011 à 08:19, James Merkel a écrit :
>
> On Jun 29, 2011, at 11:07 PM, Kyle Sluder wrote:
>
>> On Wed, Jun 29, 2011 at 10:38 PM, James Merkel wrote:
>>> Ok, thanks. For what I'm doing file descriptors are not a scarce resource.
>>
>> File descriptors are almost always a scarce reso
On Jun 29, 2011, at 11:07 PM, Kyle Sluder wrote:
On Wed, Jun 29, 2011 at 10:38 PM, James Merkel
wrote:
Ok, thanks. For what I'm doing file descriptors are not a scarce
resource.
File descriptors are almost always a scarce resource. By default, each
process only gets 256 of them.
--Kyle S
On Wed, Jun 29, 2011 at 10:38 PM, James Merkel wrote:
> Ok, thanks. For what I'm doing file descriptors are not a scarce resource.
File descriptors are almost always a scarce resource. By default, each
process only gets 256 of them.
--Kyle Sluder
___
On Jun 29, 2011, at 9:47 PM, Quincey Morris wrote:
On Jun 29, 2011, at 17:43, James Merkel wrote:
"You should typically not manage scarce resources such as file
descriptors, network connections, and buffers or caches in a
dealloc method. In particular, you should not design classes so
th
On Jun 29, 2011, at 17:43, James Merkel wrote:
> "You should typically not manage scarce resources such as file descriptors,
> network connections, and buffers or caches in a dealloc method. In
> particular, you should not design classes so that dealloc will be invoked
> when you think it will
On Jun 29, 2011, at 7:17 PM, Wim Lewis wrote:
On 29 Jun 2011, at 5:43 PM, James Merkel wrote:
In the [Memory Management Programming Guide] it says:
"You should typically not manage scarce resources such as file
descriptors, network connections, and buffers or caches in a
dealloc method.
On 29 Jun 2011, at 5:43 PM, James Merkel wrote:
> In the [Memory Management Programming Guide] it says:
>
> "You should typically not manage scarce resources such as file descriptors,
> network connections, and buffers or caches in a dealloc method. In
> particular, you should not design classe
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