intel_lock.c File Reference

Include dependency graph for intel_lock.c:

Go to the source code of this file.

Functions
	pipe_static_mutex (lockMutex)
static void	intelContendedLock (struct intel_context *intel, uint flags)
void	LOCK_HARDWARE (struct intel_context *intel)
void	UNLOCK_HARDWARE (struct intel_context *intel)

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Function Documentation

static void intelContendedLock	(	struct intel_context *	intel,
		uint	flags
	)			[static]

Definition at line 42 of file intel_lock.c.

References __progname, DBG, intel_context::driDrawable, intel_context::driFd, intel_context::driScreen, intel_screen::front, intel_screen::height, drmI830Sarea::height, intel_context::hHWContext, intel_screen(), intelUpdateScreenRotation(), intel_context::sarea, intel_screen::sarea, intel_screen::width, and drmI830Sarea::width.

{
   __DRIdrawablePrivate *dPriv = intel->driDrawable;
   __DRIscreenPrivate *sPriv = intel->driScreen;
   struct intel_screen *intelScreen = intel_screen(sPriv);
   drmI830Sarea *sarea = intel->sarea;

   drmGetLock(intel->driFd, intel->hHWContext, flags);

   DBG(LOCK, "%s - got contended lock\n", __progname);

   /* If the window moved, may need to set a new cliprect now.
    *
    * NOTE: This releases and regains the hw lock, so all state
    * checking must be done *after* this call:
    */
   if (dPriv)
      DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);

   if (sarea->width != intelScreen->front.width ||
       sarea->height != intelScreen->front.height) {

      intelUpdateScreenRotation(sPriv, sarea);
   }
}

void LOCK_HARDWARE

(

struct intel_context *

intel

)

Definition at line 71 of file intel_lock.c.

References __progname, assert, DBG, intel_context::driHwLock, intel_context::hHWContext, intelContendedLock(), intel_context::locked, and pipe_mutex_lock.

{
    char __ret = 0;

    pipe_mutex_lock(lockMutex);
    assert(!intel->locked);

    DRM_CAS(intel->driHwLock, intel->hHWContext,
            (DRM_LOCK_HELD|intel->hHWContext), __ret);

    if (__ret)
       intelContendedLock( intel, 0 );

    DBG(LOCK, "%s - locked\n", __progname);

    intel->locked = 1;
}

pipe_static_mutex

(

lockMutex

)

void UNLOCK_HARDWARE

(

struct intel_context *

intel

)

Definition at line 92 of file intel_lock.c.

References __progname, assert, DBG, intel_context::driFd, intel_context::driHwLock, intel_context::hHWContext, intel_context::locked, and pipe_mutex_unlock.

{
   assert(intel->locked);
   intel->locked = 0;

   DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);

   pipe_mutex_unlock(lockMutex);

   DBG(LOCK, "%s - unlocked\n", __progname);
}

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