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Viewing changes to src/VBox/HostDrivers/Support/SUPR0IdcClient.c

  • Committer: Bazaar Package Importer
  • Author(s): Felix Geyer
  • Date: 2011-01-30 23:27:25 UTC
  • mfrom: (0.3.12 upstream)
  • Revision ID: james.westby@ubuntu.com-20110130232725-2ouajjd2ggdet0zd
Tags: 4.0.2-dfsg-1ubuntu1
* Merge from Debian unstable, remaining changes:
  - Add Apport hook.
    - debian/virtualbox-ose.files/source_virtualbox-ose.py
    - debian/virtualbox-ose.install
  - Drop *-source packages.
* Drop ubuntu-01-fix-build-gcc45.patch, fixed upstream.
* Drop ubuntu-02-as-needed.patch, added to the Debian package.

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src/VBox/HostDrivers/Support/SUPR0IdcClient.c
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/* $Id: SUPR0IdcClient.c $ */
 
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/* $Id: SUPR0IdcClient.c 33540 2010-10-28 09:27:05Z vboxsync $ */
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/** @file
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 * VirtualBox Support Driver - IDC Client Lib, Core.
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 */
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 * Opens the IDC interface of the support driver.
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 *
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 * This will perform basic version negotiations and fail if the
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 * minmum requirements aren't met.
 
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 * minimum requirements aren't met.
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 *
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 * @returns VBox status code.
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 * @param   pHandle             The handle structure (output).
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            &&  Req.u.Out.uSessionVersion >= uMinVersion
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            &&  (Req.u.Out.uSessionVersion & UINT32_C(0xffff0000)) == (SUPDRV_IDC_VERSION & UINT32_C(0xffff0000)))
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        {
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            ASMAtomicCmpXchgPtr((void * volatile *)&g_pMainHandle, pHandle, NULL);
 
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            ASMAtomicCmpXchgPtr(&g_pMainHandle, pHandle, NULL);
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            return rc;
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        }
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    if (RT_SUCCESS(rc))
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    {
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        pHandle->s.pSession = NULL;
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        ASMAtomicCmpXchgPtr((void * volatile *)&g_pMainHandle, NULL, pHandle);
 
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        ASMAtomicCmpXchgPtr(&g_pMainHandle, NULL, pHandle);
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    }
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    return rc;
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}
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 */
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PSUPDRVIDCHANDLE supR0IdcGetHandleFromSession(PSUPDRVSESSION pSession)
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{
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    PSUPDRVIDCHANDLE pHandle = (PSUPDRVIDCHANDLE)ASMAtomicUoReadPtr((void * volatile *)&g_pMainHandle);
 
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    PSUPDRVIDCHANDLE pHandle = ASMAtomicUoReadPtrT(&g_pMainHandle, PSUPDRVIDCHANDLE);
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    if (    VALID_PTR(pHandle)
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        &&  pHandle->s.pSession == pSession)
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        return pHandle;