IABSD.fr/xenocara/xserver/miext/sync/misyncfd.c

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• Author : matthieu
  Date : 2015-09-16 19:10:19
  Hash : 86ea9f12
  Message : Update to xserver 1.17.2. tested by dcoppa@, jsg@, jasper@ & naddy@

• xserver/miext/sync/misyncfd.c

• /*
   * Copyright © 2013 Keith Packard
   *
   * Permission to use, copy, modify, distribute, and sell this software and its
   * documentation for any purpose is hereby granted without fee, provided that
   * the above copyright notice appear in all copies and that both that copyright
   * notice and this permission notice appear in supporting documentation, and
   * that the name of the copyright holders not be used in advertising or
   * publicity pertaining to distribution of the software without specific,
   * written prior permission.  The copyright holders make no representations
   * about the suitability of this software for any purpose.  It is provided "as
   * is" without express or implied warranty.
   *
   * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
   * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
   * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
   * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
   * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
   * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
   * OF THIS SOFTWARE.
   */
  
  #ifdef HAVE_DIX_CONFIG_H
  #include <dix-config.h>
  #endif
  
  #include "scrnintstr.h"
  #include "misync.h"
  #include "misyncstr.h"
  #include "misyncfd.h"
  #include "pixmapstr.h"
  
  static DevPrivateKeyRec syncFdScreenPrivateKey;
  
  typedef struct _SyncFdScreenPrivate {
      SyncFdScreenFuncsRec        funcs;
  } SyncFdScreenPrivateRec, *SyncFdScreenPrivatePtr;
  
  static inline SyncFdScreenPrivatePtr sync_fd_screen_priv(ScreenPtr pScreen)
  {
      if (!dixPrivateKeyRegistered(&syncFdScreenPrivateKey))
          return NULL;
      return dixLookupPrivate(&pScreen->devPrivates, &syncFdScreenPrivateKey);
  }
  
  int
  miSyncInitFenceFromFD(DrawablePtr pDraw, SyncFence *pFence, int fd, BOOL initially_triggered)
  
  {
      SyncFdScreenPrivatePtr      priv = sync_fd_screen_priv(pDraw->pScreen);
  
      if (!priv)
          return BadMatch;
  
      return (*priv->funcs.CreateFenceFromFd)(pDraw->pScreen, pFence, fd, initially_triggered);
  }
  
  int
  miSyncFDFromFence(DrawablePtr pDraw, SyncFence *pFence)
  {
      SyncFdScreenPrivatePtr      priv = sync_fd_screen_priv(pDraw->pScreen);
  
      if (!priv)
          return -1;
  
      return (*priv->funcs.GetFenceFd)(pDraw->pScreen, pFence);
  }
  
  _X_EXPORT Bool miSyncFdScreenInit(ScreenPtr pScreen,
                                    const SyncFdScreenFuncsRec *funcs)
  {
      SyncFdScreenPrivatePtr     priv;
  
      /* Check to see if we've already been initialized */
      if (sync_fd_screen_priv(pScreen) != NULL)
          return FALSE;
  
      if (!miSyncSetup(pScreen))
          return FALSE;
  
      if (!dixPrivateKeyRegistered(&syncFdScreenPrivateKey)) {
          if (!dixRegisterPrivateKey(&syncFdScreenPrivateKey, PRIVATE_SCREEN, 0))
              return FALSE;
      }
  
      priv = calloc(1, sizeof (SyncFdScreenPrivateRec));
      if (!priv)
          return FALSE;
  
      /* Will require version checks when there are multiple versions
       * of the funcs structure
       */
  
      priv->funcs = *funcs;
  
      dixSetPrivate(&pScreen->devPrivates, &syncFdScreenPrivateKey, priv);
  
      return TRUE;
  }