Subject: get into sleep and release the lock in an atomic operation
From: Kallol Biswas <kallol@efi.com>
Reply-To: kallol@efi.com
To: linux-kernel@vger.kernel.org
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Organization: EFI
Message-Id: <1064881043.8221.21.camel@wskallol>
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Date: 29 Sep 2003 17:17:23 -0700
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Sender: linux-kernel-owner@vger.kernel.org

Consider the few lines of code:

spinlock()

if (num == 0) {
  sleep and release the spinlock in an atomic operation.
}

In the OS like HP-UX there was a sleep lock concept, the
code would look like:

get_sleeplock()

if (num== 0) {
   sleep and release the lock
}

Is there any primitive that implements this kind of spinlock and
sleep in linux?  I could not find it.
I know it can be implemented.


Kallol

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