getting the location ID of an object

Hdf-forum archives
1

Hello,

is there a way to get the location ID of an object given the object itself,
or maybe from the location parameters? (H5VL_loc_params_t).
For example, if we want to iterate over the attributes of group "mygroup",
we call H5Aiterate2 and we pass the location ID of mygroup. Then, within
the attr_specific function we get the group itself (void* obj) and not its
location ID. Is there a way to get the location ID somehow? It is required
for passing it to the apply function.

Thanks,

Dimos

2

You can’t get the location id, but you can create one yourself using:
H5VLobject_register() if external plugin
Or H5VL_object_register() if internal plugin.

Thanks,
Mohamad

···

From: Hdf-forum <hdf-forum-bounces@lists.hdfgroup.org> on behalf of Dimos Stamatakis <dimstamat@gmail.com>
Reply-To: hdf-forum <hdf-forum@lists.hdfgroup.org>
Date: Tuesday, June 14, 2016 at 10:24 AM
To: hdf-forum <hdf-forum@lists.hdfgroup.org>
Subject: [Hdf-forum] getting the location ID of an object

Hello,

is there a way to get the location ID of an object given the object itself, or maybe from the location parameters? (H5VL_loc_params_t).
For example, if we want to iterate over the attributes of group "mygroup", we call H5Aiterate2 and we pass the location ID of mygroup. Then, within the attr_specific function we get the group itself (void* obj) and not its location ID. Is there a way to get the location ID somehow? It is required for passing it to the apply function.

Thanks,

Dimos

3

OK, then I could maybe call H5VL_object_register to get new ID and then unregister at the end? The other way was to pass the group's location ID as a parameter in the void* op_data, but I want to leave the user application unchanged. Is this how the native VOL plugin gets the group object’s location ID? By registering it again?

Thanks,

Dimos

···

---
Dimokritos Stamatakis
PhD student,
Brandeis University

On Jun 14, 2016, at 1:42 PM, hdf-forum-request@lists.hdfgroup.org wrote:

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Today's Topics:

  1. getting the location ID of an object (Dimos Stamatakis)
  2. Re: getting the location ID of an object (Mohamad Chaarawi)

----------------------------------------------------------------------

Message: 1
Date: Tue, 14 Jun 2016 13:03:33 -0400
From: Dimos Stamatakis <dimstamat@gmail.com>
To: hdf-forum@lists.hdfgroup.org
Subject: [Hdf-forum] getting the location ID of an object
Message-ID: <25ADAB6F-5B79-424A-9D69-62137E17CCED@gmail.com>
Content-Type: text/plain; charset="us-ascii"

Thanks Mohamad! However, I would need the same location ID, not an new one. For example, how does the native find the location ID of the containing group so that to pass it to the apply callback op (H5A_operator2_t op)?

Thanks,

Dimos

---
Dimokritos Stamatakis
PhD student,
Brandeis University

On Jun 14, 2016, at 1:00 PM, hdf-forum-request@lists.hdfgroup.org wrote:

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Today's Topics:

1. Re: getting the location ID of an object (Mohamad Chaarawi)

----------------------------------------------------------------------

Message: 1
Date: Tue, 14 Jun 2016 15:56:56 +0000
From: Mohamad Chaarawi <chaarawi@hdfgroup.org>
To: HDF Users Discussion List <hdf-forum@lists.hdfgroup.org>
Subject: Re: [Hdf-forum] getting the location ID of an object
Message-ID: <2CBBE8D5-A95A-49EE-B315-1EF05D8AEC85@hdfgroup.org>
Content-Type: text/plain; charset="utf-8"

You can?t get the location id, but you can create one yourself using:
H5VLobject_register() if external plugin
Or H5VL_object_register() if internal plugin.

Thanks,
Mohamad

From: Hdf-forum <hdf-forum-bounces@lists.hdfgroup.org> on behalf of Dimos Stamatakis <dimstamat@gmail.com>
Reply-To: hdf-forum <hdf-forum@lists.hdfgroup.org>
Date: Tuesday, June 14, 2016 at 10:24 AM
To: hdf-forum <hdf-forum@lists.hdfgroup.org>
Subject: [Hdf-forum] getting the location ID of an object

Hello,

is there a way to get the location ID of an object given the object itself, or maybe from the location parameters? (H5VL_loc_params_t).
For example, if we want to iterate over the attributes of group "mygroup", we call H5Aiterate2 and we pass the location ID of mygroup. Then, within the attr_specific function we get the group itself (void* obj) and not its location ID. Is there a way to get the location ID somehow? It is required for passing it to the apply function.

Thanks,

Dimos
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Message: 2
Date: Tue, 14 Jun 2016 17:41:20 +0000
From: Mohamad Chaarawi <chaarawi@hdfgroup.org>
To: HDF Users Discussion List <hdf-forum@lists.hdfgroup.org>
Subject: Re: [Hdf-forum] getting the location ID of an object
Message-ID: <82A068B3-B4C0-4608-82E1-8F73FDC99185@hdfgroup.org>
Content-Type: text/plain; charset="utf-8"

Hmm why do you need the same ID?
The ID is just a token that will dereference to the same object.

There is no requirement that the ID be the same.

Mohamad

From: Hdf-forum <hdf-forum-bounces@lists.hdfgroup.org> on behalf of Dimos Stamatakis <dimstamat@gmail.com>
Reply-To: hdf-forum <hdf-forum@lists.hdfgroup.org>
Date: Tuesday, June 14, 2016 at 12:03 PM
To: hdf-forum <hdf-forum@lists.hdfgroup.org>
Subject: [Hdf-forum] getting the location ID of an object

Thanks Mohamad! However, I would need the same location ID, not an new one. For example, how does the native find the location ID of the containing group so that to pass it to the apply callback op (H5A_operator2_t op)?

Thanks,

Dimos

---
Dimokritos Stamatakis
PhD student,
Brandeis University

On Jun 14, 2016, at 1:00 PM, hdf-forum-request@lists.hdfgroup.org<mailto:hdf-forum-request@lists.hdfgroup.org> wrote:

Send Hdf-forum mailing list submissions to
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or, via email, send a message with subject or body 'help' to
hdf-forum-request@lists.hdfgroup.org

You can reach the person managing the list at
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of Hdf-forum digest..."

Today's Topics:

1. Re: getting the location ID of an object (Mohamad Chaarawi)

----------------------------------------------------------------------

Message: 1
Date: Tue, 14 Jun 2016 15:56:56 +0000
From: Mohamad Chaarawi <chaarawi@hdfgroup.org>
To: HDF Users Discussion List <hdf-forum@lists.hdfgroup.org>
Subject: Re: [Hdf-forum] getting the location ID of an object
Message-ID: <2CBBE8D5-A95A-49EE-B315-1EF05D8AEC85@hdfgroup.org>
Content-Type: text/plain; charset="utf-8"

You can?t get the location id, but you can create one yourself using:
H5VLobject_register() if external plugin
Or H5VL_object_register() if internal plugin.

Thanks,
Mohamad

From: Hdf-forum <hdf-forum-bounces@lists.hdfgroup.org> on behalf of Dimos Stamatakis <dimstamat@gmail.com>
Reply-To: hdf-forum <hdf-forum@lists.hdfgroup.org>
Date: Tuesday, June 14, 2016 at 10:24 AM
To: hdf-forum <hdf-forum@lists.hdfgroup.org>
Subject: [Hdf-forum] getting the location ID of an object

Hello,

is there a way to get the location ID of an object given the object itself, or maybe from the location parameters? (H5VL_loc_params_t).
For example, if we want to iterate over the attributes of group "mygroup", we call H5Aiterate2 and we pass the location ID of mygroup. Then, within the attr_specific function we get the group itself (void* obj) and not its location ID. Is there a way to get the location ID somehow? It is required for passing it to the apply function.

Thanks,

Dimos
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_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
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------------------------------

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4

Thanks Mohamad! However, I would need the same location ID, not an new one. For example, how does the native find the location ID of the containing group so that to pass it to the apply callback op (H5A_operator2_t op)?

Thanks,

Dimos

···

---
Dimokritos Stamatakis
PhD student,
Brandeis University

On Jun 14, 2016, at 1:00 PM, hdf-forum-request@lists.hdfgroup.org wrote:

Send Hdf-forum mailing list submissions to
  hdf-forum@lists.hdfgroup.org

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or, via email, send a message with subject or body 'help' to
  hdf-forum-request@lists.hdfgroup.org

You can reach the person managing the list at
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of Hdf-forum digest..."

Today's Topics:

  1. Re: getting the location ID of an object (Mohamad Chaarawi)

----------------------------------------------------------------------

Message: 1
Date: Tue, 14 Jun 2016 15:56:56 +0000
From: Mohamad Chaarawi <chaarawi@hdfgroup.org>
To: HDF Users Discussion List <hdf-forum@lists.hdfgroup.org>
Subject: Re: [Hdf-forum] getting the location ID of an object
Message-ID: <2CBBE8D5-A95A-49EE-B315-1EF05D8AEC85@hdfgroup.org>
Content-Type: text/plain; charset="utf-8"

You can?t get the location id, but you can create one yourself using:
H5VLobject_register() if external plugin
Or H5VL_object_register() if internal plugin.

Thanks,
Mohamad

From: Hdf-forum <hdf-forum-bounces@lists.hdfgroup.org> on behalf of Dimos Stamatakis <dimstamat@gmail.com>
Reply-To: hdf-forum <hdf-forum@lists.hdfgroup.org>
Date: Tuesday, June 14, 2016 at 10:24 AM
To: hdf-forum <hdf-forum@lists.hdfgroup.org>
Subject: [Hdf-forum] getting the location ID of an object

Hello,

is there a way to get the location ID of an object given the object itself, or maybe from the location parameters? (H5VL_loc_params_t).
For example, if we want to iterate over the attributes of group "mygroup", we call H5Aiterate2 and we pass the location ID of mygroup. Then, within the attr_specific function we get the group itself (void* obj) and not its location ID. Is there a way to get the location ID somehow? It is required for passing it to the apply function.

Thanks,

Dimos
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Subject: Digest Footer

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org

------------------------------

End of Hdf-forum Digest, Vol 84, Issue 13
*****************************************

5

Hmm why do you need the same ID?
The ID is just a token that will dereference to the same object.

There is no requirement that the ID be the same.

Mohamad

···

From: Hdf-forum <hdf-forum-bounces@lists.hdfgroup.org> on behalf of Dimos Stamatakis <dimstamat@gmail.com>
Reply-To: hdf-forum <hdf-forum@lists.hdfgroup.org>
Date: Tuesday, June 14, 2016 at 12:03 PM
To: hdf-forum <hdf-forum@lists.hdfgroup.org>
Subject: [Hdf-forum] getting the location ID of an object

Thanks Mohamad! However, I would need the same location ID, not an new one. For example, how does the native find the location ID of the containing group so that to pass it to the apply callback op (H5A_operator2_t op)?

Thanks,

Dimos

---
Dimokritos Stamatakis
PhD student,
Brandeis University

On Jun 14, 2016, at 1:00 PM, hdf-forum-request@lists.hdfgroup.org<mailto:hdf-forum-request@lists.hdfgroup.org> wrote:

Send Hdf-forum mailing list submissions to
hdf-forum@lists.hdfgroup.org<mailto:hdf-forum@lists.hdfgroup.org>

To subscribe or unsubscribe via the World Wide Web, visit
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org

or, via email, send a message with subject or body 'help' to
hdf-forum-request@lists.hdfgroup.org

You can reach the person managing the list at
hdf-forum-owner@lists.hdfgroup.org

When replying, please edit your Subject line so it is more specific
than "Re: Contents of Hdf-forum digest..."

Today's Topics:

  1. Re: getting the location ID of an object (Mohamad Chaarawi)

----------------------------------------------------------------------

Message: 1
Date: Tue, 14 Jun 2016 15:56:56 +0000
From: Mohamad Chaarawi <chaarawi@hdfgroup.org>
To: HDF Users Discussion List <hdf-forum@lists.hdfgroup.org>
Subject: Re: [Hdf-forum] getting the location ID of an object
Message-ID: <2CBBE8D5-A95A-49EE-B315-1EF05D8AEC85@hdfgroup.org>
Content-Type: text/plain; charset="utf-8"

You can?t get the location id, but you can create one yourself using:
H5VLobject_register() if external plugin
Or H5VL_object_register() if internal plugin.

Thanks,
Mohamad

From: Hdf-forum <hdf-forum-bounces@lists.hdfgroup.org> on behalf of Dimos Stamatakis <dimstamat@gmail.com>
Reply-To: hdf-forum <hdf-forum@lists.hdfgroup.org>
Date: Tuesday, June 14, 2016 at 10:24 AM
To: hdf-forum <hdf-forum@lists.hdfgroup.org>
Subject: [Hdf-forum] getting the location ID of an object

Hello,

is there a way to get the location ID of an object given the object itself, or maybe from the location parameters? (H5VL_loc_params_t).
For example, if we want to iterate over the attributes of group "mygroup", we call H5Aiterate2 and we pass the location ID of mygroup. Then, within the attr_specific function we get the group itself (void* obj) and not its location ID. Is there a way to get the location ID somehow? It is required for passing it to the apply function.

Thanks,

Dimos
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Subject: Digest Footer

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org

------------------------------

End of Hdf-forum Digest, Vol 84, Issue 13
*****************************************