[Xquartz-changes] xserver: Branch 'server-1.13-apple' - 4 commits
Jeremy Huddleston
jeremyhu at freedesktop.org
Wed Aug 29 16:11:31 PDT 2012
Rebased ref, commits from common ancestor:
commit 5def6ce1084bd554b915e1103ae9cce181f5f8ff
Author: Jeremy Huddleston <jeremyhu at apple.com>
Date: Fri Feb 12 19:48:52 2010 -0800
fb: Revert fb changes that broke XQuartz
http://bugs.freedesktop.org/show_bug.cgi?id=26124
Revert "Fix source pictures getting random transforms after 2d6a8f668342a5190cdf43b5."
Revert "fb: Adjust transform or composite coordinates for pixman operations"
http://bugs.freedesktop.org/26124
This reverts commit a72c65e9176c51de95db2fdbf4c5d946a4911695.
This reverts commit a6bd5d2e482a5aa84acb3d4932e2a166d8670ef1.
Signed-off-by: Jeremy Huddleston <jeremyhu at apple.com>
diff --git a/fb/fb.h b/fb/fb.h
index 40a7e38..52d0b0a 100644
--- a/fb/fb.h
+++ b/fb/fb.h
@@ -1684,8 +1684,7 @@ fbFillRegionSolid(DrawablePtr pDrawable,
RegionPtr pRegion, FbBits and, FbBits xor);
extern _X_EXPORT pixman_image_t *image_from_pict(PicturePtr pict,
- Bool has_clip,
- int *xoff, int *yoff);
+ Bool has_clip);
extern _X_EXPORT void free_pixman_pict(PicturePtr, pixman_image_t *);
diff --git a/fb/fbpict.c b/fb/fbpict.c
index 097a1a6..dc0ca3c 100644
--- a/fb/fbpict.c
+++ b/fb/fbpict.c
@@ -46,23 +46,18 @@ fbComposite(CARD8 op,
INT16 yMask, INT16 xDst, INT16 yDst, CARD16 width, CARD16 height)
{
pixman_image_t *src, *mask, *dest;
- int src_xoff, src_yoff;
- int msk_xoff, msk_yoff;
- int dst_xoff, dst_yoff;
-
miCompositeSourceValidate(pSrc);
if (pMask)
miCompositeSourceValidate(pMask);
- src = image_from_pict(pSrc, FALSE, &src_xoff, &src_yoff);
- mask = image_from_pict(pMask, FALSE, &msk_xoff, &msk_yoff);
- dest = image_from_pict(pDst, TRUE, &dst_xoff, &dst_yoff);
+ src = image_from_pict(pSrc, TRUE);
+ mask = image_from_pict(pMask, TRUE);
+ dest = image_from_pict(pDst, TRUE);
if (src && dest && !(pMask && !mask)) {
pixman_image_composite(op, src, mask, dest,
- xSrc + src_xoff, ySrc + src_yoff,
- xMask + msk_xoff, yMask + msk_yoff,
- xDst + dst_xoff, yDst + dst_yoff, width, height);
+ xSrc, ySrc, xMask, yMask, xDst, yDst,
+ width, height);
}
free_pixman_pict(pSrc, src);
@@ -143,20 +138,22 @@ create_conical_gradient_image(PictGradient * gradient)
}
static pixman_image_t *
-create_bits_picture(PicturePtr pict, Bool has_clip, int *xoff, int *yoff)
+create_bits_picture(PicturePtr pict, Bool has_clip)
{
- PixmapPtr pixmap;
FbBits *bits;
FbStride stride;
- int bpp;
+ int bpp, xoff, yoff;
pixman_image_t *image;
- fbGetDrawablePixmap(pict->pDrawable, pixmap, *xoff, *yoff);
- fbGetPixmapBitsData(pixmap, bits, stride, bpp);
+ fbGetDrawable (pict->pDrawable, bits, stride, bpp, xoff, yoff);
+
+ bits = (FbBits*)((CARD8*)bits +
+ (pict->pDrawable->y + yoff) * stride * sizeof(FbBits) +
+ (pict->pDrawable->x + xoff) * (bpp / 8));
image = pixman_image_create_bits((pixman_format_code_t) pict->format,
- pixmap->drawable.width,
- pixmap->drawable.height, (uint32_t *) bits,
+ pict->pDrawable->width,
+ pict->pDrawable->height, (uint32_t *) bits,
stride * sizeof(FbStride));
if (!image)
@@ -183,57 +180,31 @@ create_bits_picture(PicturePtr pict, Bool has_clip, int *xoff, int *yoff)
if (pict->clientClipType != CT_NONE)
pixman_image_set_has_client_clip(image, TRUE);
- if (*xoff || *yoff)
- pixman_region_translate(pict->pCompositeClip, *xoff, *yoff);
+ pixman_region_translate (pict->pCompositeClip, - pict->pDrawable->x, - pict->pDrawable->y);
pixman_image_set_clip_region(image, pict->pCompositeClip);
- if (*xoff || *yoff)
- pixman_region_translate(pict->pCompositeClip, -*xoff, -*yoff);
+ pixman_region_translate (pict->pCompositeClip, pict->pDrawable->x, pict->pDrawable->y);
}
/* Indexed table */
if (pict->pFormat->index.devPrivate)
pixman_image_set_indexed(image, pict->pFormat->index.devPrivate);
- /* Add in drawable origin to position within the image */
- *xoff += pict->pDrawable->x;
- *yoff += pict->pDrawable->y;
-
return image;
}
static pixman_image_t *image_from_pict_internal(PicturePtr pict, Bool has_clip,
- int *xoff, int *yoff,
Bool is_alpha_map);
static void
-set_image_properties(pixman_image_t * image, PicturePtr pict, Bool has_clip,
- int *xoff, int *yoff, Bool is_alpha_map)
+set_image_properties(pixman_image_t * image, PicturePtr pict, Bool is_alpha_map)
{
pixman_repeat_t repeat;
pixman_filter_t filter;
if (pict->transform) {
- /* For source images, adjust the transform to account
- * for the drawable offset within the pixman image,
- * then set the offset to 0 as it will be used
- * to compute positions within the transformed image.
- */
- if (!has_clip) {
- struct pixman_transform adjusted;
-
- adjusted = *pict->transform;
- pixman_transform_translate(&adjusted,
- NULL,
- pixman_int_to_fixed(*xoff),
- pixman_int_to_fixed(*yoff));
- pixman_image_set_transform(image, &adjusted);
- *xoff = 0;
- *yoff = 0;
- }
- else
- pixman_image_set_transform(image, pict->transform);
+ pixman_image_set_transform(image, pict->transform);
}
switch (pict->repeatType) {
@@ -261,10 +232,8 @@ set_image_properties(pixman_image_t * image, PicturePtr pict, Bool has_clip,
* as the alpha map for this operation
*/
if (pict->alphaMap && !is_alpha_map) {
- int alpha_xoff, alpha_yoff;
pixman_image_t *alpha_map =
- image_from_pict_internal(pict->alphaMap, FALSE, &alpha_xoff,
- &alpha_yoff, TRUE);
+ image_from_pict_internal(pict->alphaMap, TRUE, TRUE);
pixman_image_set_alpha_map(image, alpha_map, pict->alphaOrigin.x,
pict->alphaOrigin.y);
@@ -298,8 +267,7 @@ set_image_properties(pixman_image_t * image, PicturePtr pict, Bool has_clip,
}
static pixman_image_t *
-image_from_pict_internal(PicturePtr pict, Bool has_clip, int *xoff, int *yoff,
- Bool is_alpha_map)
+image_from_pict_internal(PicturePtr pict, Bool has_clip, Bool is_alpha_map)
{
pixman_image_t *image = NULL;
@@ -307,7 +275,7 @@ image_from_pict_internal(PicturePtr pict, Bool has_clip, int *xoff, int *yoff,
return NULL;
if (pict->pDrawable) {
- image = create_bits_picture(pict, has_clip, xoff, yoff);
+ image = create_bits_picture(pict, has_clip);
}
else if (pict->pSourcePict) {
SourcePict *sp = pict->pSourcePict;
@@ -325,19 +293,17 @@ image_from_pict_internal(PicturePtr pict, Bool has_clip, int *xoff, int *yoff,
else if (sp->type == SourcePictTypeConical)
image = create_conical_gradient_image(gradient);
}
- *xoff = *yoff = 0;
}
if (image)
- set_image_properties(image, pict, has_clip, xoff, yoff, is_alpha_map);
-
+ set_image_properties (image, pict, is_alpha_map);
return image;
}
pixman_image_t *
-image_from_pict(PicturePtr pict, Bool has_clip, int *xoff, int *yoff)
+image_from_pict (PicturePtr pict, Bool has_clip)
{
- return image_from_pict_internal(pict, has_clip, xoff, yoff, FALSE);
+ return image_from_pict_internal (pict, has_clip, FALSE);
}
void
diff --git a/fb/fbtrap.c b/fb/fbtrap.c
index bf82f8f..0145ce9 100644
--- a/fb/fbtrap.c
+++ b/fb/fbtrap.c
@@ -36,13 +36,12 @@ fbAddTraps(PicturePtr pPicture,
INT16 x_off, INT16 y_off, int ntrap, xTrap * traps)
{
pixman_image_t *image;
- int dst_xoff, dst_yoff;
- if (!(image = image_from_pict(pPicture, FALSE, &dst_xoff, &dst_yoff)))
- return;
-
- pixman_add_traps(image, x_off + dst_xoff, y_off + dst_yoff,
- ntrap, (pixman_trap_t *) traps);
+ if (!(image = image_from_pict (pPicture, FALSE)))
+ return;
+
+ pixman_add_traps(image, x_off, y_off,
+ ntrap, (pixman_trap_t *)traps);
free_pixman_pict(pPicture, image);
}
@@ -52,13 +51,12 @@ fbRasterizeTrapezoid(PicturePtr pPicture,
xTrapezoid * trap, int x_off, int y_off)
{
pixman_image_t *image;
- int dst_xoff, dst_yoff;
- if (!(image = image_from_pict(pPicture, FALSE, &dst_xoff, &dst_yoff)))
+ if (!(image = image_from_pict (pPicture, FALSE)))
return;
- pixman_rasterize_trapezoid(image, (pixman_trapezoid_t *) trap,
- x_off + dst_xoff, y_off + dst_yoff);
+ pixman_rasterize_trapezoid(image, (pixman_trapezoid_t *)trap,
+ x_off, y_off);
free_pixman_pict(pPicture, image);
}
@@ -68,14 +66,12 @@ fbAddTriangles(PicturePtr pPicture,
INT16 x_off, INT16 y_off, int ntri, xTriangle * tris)
{
pixman_image_t *image;
- int dst_xoff, dst_yoff;
- if (!(image = image_from_pict(pPicture, FALSE, &dst_xoff, &dst_yoff)))
+ if (!(image = image_from_pict (pPicture, FALSE)))
return;
-
- pixman_add_triangles(image,
- dst_xoff + x_off, dst_yoff + y_off,
- ntri, (pixman_triangle_t *) tris);
+
+ pixman_add_triangles(image, x_off, y_off, ntri,
+ (pixman_triangle_t *)tris);
free_pixman_pict(pPicture, image);
}
@@ -98,13 +94,11 @@ fbShapes(CompositeShapesFunc composite,
int16_t ySrc, int nshapes, int shape_size, const uint8_t * shapes)
{
pixman_image_t *src, *dst;
- int src_xoff, src_yoff;
- int dst_xoff, dst_yoff;
miCompositeSourceValidate(pSrc);
- src = image_from_pict(pSrc, FALSE, &src_xoff, &src_yoff);
- dst = image_from_pict(pDst, TRUE, &dst_xoff, &dst_yoff);
+ src = image_from_pict(pSrc, FALSE);
+ dst = image_from_pict(pDst, TRUE);
if (src && dst) {
pixman_format_code_t format;
@@ -121,9 +115,8 @@ fbShapes(CompositeShapesFunc composite,
for (i = 0; i < nshapes; ++i) {
composite(op, src, dst, format,
- xSrc + src_xoff,
- ySrc + src_yoff,
- dst_xoff, dst_yoff, 1, shapes + i * shape_size);
+ xSrc, ySrc, 0, 0,
+ 1, shapes + i * shape_size);
}
}
else {
@@ -143,8 +136,8 @@ fbShapes(CompositeShapesFunc composite,
}
composite(op, src, dst, format,
- xSrc + src_xoff,
- ySrc + src_yoff, dst_xoff, dst_yoff, nshapes, shapes);
+ xSrc, ySrc, 0, 0,
+ nshapes, shapes);
}
DamageRegionProcessPending(pDst->pDrawable);
commit 410e7c31182e117f693ee5f786077e2d7a7a327e
Author: Jeremy Huddleston <jeremyhu at apple.com>
Date: Fri Apr 30 13:08:25 2010 -0700
Workaround the GC clipping problem in miPaintWindow and add some debugging output.
Signed-off-by: Jeremy Huddleston <jeremyhu at apple.com>
diff --git a/mi/miexpose.c b/mi/miexpose.c
index 8b7c93f..3e972f7 100644
--- a/mi/miexpose.c
+++ b/mi/miexpose.c
@@ -489,7 +489,8 @@ void RootlessSetPixmapOfAncestors(WindowPtr pWin);
void RootlessStartDrawing(WindowPtr pWin);
void RootlessDamageRegion(WindowPtr pWin, RegionPtr prgn);
Bool IsFramedWindow(WindowPtr pWin);
-#endif
+#include "../fb/fb.h"
+#endif
void
miPaintWindow(WindowPtr pWin, RegionPtr prgn, int what)
@@ -518,23 +519,37 @@ miPaintWindow(WindowPtr pWin, RegionPtr prgn, int what)
Bool solid = TRUE;
DrawablePtr drawable = &pWin->drawable;
+#ifdef XQUARTZ_CLIP_DEBUG
+ ErrorF("START %d BS %d (pR = %ld)\n", what, pWin->backgroundState, ParentRelative);
+ ErrorF(" Rgn: %d %d %d %d\n", prgn->extents.x1, prgn->extents.y1,
+ prgn->extents.x2 - prgn->extents.x1,
+ prgn->extents.y2 - prgn->extents.y1);
+ ErrorF(" Win: %d %d (%d %d) %d %d\n", pWin->origin.x, pWin->origin.y,
+ pWin->winSize.extents.x1, pWin->winSize.extents.y1,
+ pWin->winSize.extents.x2 - pWin->winSize.extents.x1,
+ pWin->winSize.extents.y2 - pWin->winSize.extents.y1);
+ ErrorF(" Draw: %d %d %d %d\n", pWin->drawable.x, pWin->drawable.y,
+ pWin->drawable.width, pWin->drawable.height);
+#endif
+
#ifdef ROOTLESS
if (!drawable || drawable->type == UNDRAWABLE_WINDOW)
return;
+#endif
+
+ if (what == PW_BACKGROUND)
+ {
+#ifdef ROOTLESS
+ if(IsFramedWindow(pWin)) {
+ RootlessStartDrawing(pWin);
+ RootlessDamageRegion(pWin, prgn);
- if (IsFramedWindow(pWin)) {
- RootlessStartDrawing(pWin);
- RootlessDamageRegion(pWin, prgn);
-
- if (pWin->backgroundState == ParentRelative) {
- if ((what == PW_BACKGROUND) ||
- (what == PW_BORDER && !pWin->borderIsPixel))
+ if(pWin->backgroundState == ParentRelative) {
RootlessSetPixmapOfAncestors(pWin);
+ }
}
- }
#endif
- if (what == PW_BACKGROUND) {
while (pWin->backgroundState == ParentRelative)
pWin = pWin->parent;
@@ -559,6 +574,18 @@ miPaintWindow(WindowPtr pWin, RegionPtr prgn, int what)
else {
PixmapPtr pixmap;
+#ifdef ROOTLESS
+ if(IsFramedWindow(pWin)) {
+ RootlessStartDrawing(pWin);
+ RootlessDamageRegion(pWin, prgn);
+
+ if(!pWin->borderIsPixel &&
+ pWin->backgroundState == ParentRelative) {
+ RootlessSetPixmapOfAncestors(pWin);
+ }
+ }
+#endif
+
tile_x_off = drawable->x;
tile_y_off = drawable->y;
@@ -567,6 +594,12 @@ miPaintWindow(WindowPtr pWin, RegionPtr prgn, int what)
return;
pixmap = (*pScreen->GetWindowPixmap) ((WindowPtr) drawable);
drawable = &pixmap->drawable;
+
+#ifdef XQUARTZ_CLIP_DEBUG
+ ErrorF(" Draw: %d %d %d %d\n",
+ drawable->x, drawable->y, drawable->width, drawable->height);
+#endif
+
#ifdef COMPOSITE
draw_x_off = pixmap->screen_x;
draw_y_off = pixmap->screen_y;
@@ -629,6 +662,57 @@ miPaintWindow(WindowPtr pWin, RegionPtr prgn, int what)
ChangeGC(NullClient, pGC, gcmask, gcval);
ValidateGC(drawable, pGC);
+#ifdef XQUARTZ_CLIP_DEBUG
+ ErrorF(" GC: %d %d %d %d\n",
+ pGC->pCompositeClip->extents.x1, pGC->pCompositeClip->extents.y1,
+ pGC->pCompositeClip->extents.x2 - pGC->pCompositeClip->extents.x1,
+ pGC->pCompositeClip->extents.y2 - pGC->pCompositeClip->extents.y1);
+#endif
+
+#ifdef XQUARTZ
+ /* Looks like our clipping isn't set right for some reason:
+ * http://xquartz.macosforge.org/trac/ticket/290
+ */
+ if(what == PW_BORDER) {
+
+#if 0
+ if(solid) {
+#if 1
+ fbFillRegionSolid(&pWin->drawable,
+ prgn,
+ 0,
+ fbReplicatePixel(fill.pixel,
+ pWin->drawable.bitsPerPixel));
+#else
+ fbFillRegionSolid(drawable,
+ prgn,
+ 0,
+ fbReplicatePixel(fill.pixel,
+ drawable->bitsPerPixel));
+#endif
+ return;
+ }
+#endif
+
+ pGC->pCompositeClip->extents.x1 += prgn->extents.x1;
+ pGC->pCompositeClip->extents.y1 += prgn->extents.y1;
+ pGC->pCompositeClip->extents.x2 += prgn->extents.x1;
+ pGC->pCompositeClip->extents.y2 += prgn->extents.y1;
+
+ if(pGC->pCompositeClip->extents.x2 > drawable->pScreen->width)
+ pGC->pCompositeClip->extents.x2 = drawable->pScreen->width;
+ if(pGC->pCompositeClip->extents.y2 > drawable->pScreen->height)
+ pGC->pCompositeClip->extents.y2 = drawable->pScreen->height;
+ }
+#endif
+
+#ifdef XQUARTZ_CLIP_DEBUG
+ ErrorF(" GC: %d %d %d %d\n",
+ pGC->pCompositeClip->extents.x1, pGC->pCompositeClip->extents.y1,
+ pGC->pCompositeClip->extents.x2 - pGC->pCompositeClip->extents.x1,
+ pGC->pCompositeClip->extents.y2 - pGC->pCompositeClip->extents.y1);
+#endif
+
numRects = RegionNumRects(prgn);
pbox = RegionRects(prgn);
for (i = numRects; --i >= 0; pbox++, prect++) {
commit af76f65fa953ed357127d1e44ada057c88c5eacc
Author: Jeremy Huddleston <jeremyhu at apple.com>
Date: Fri Jan 13 12:00:57 2012 -0800
sdksyms.sh: Use CPPFLAGS, not CFLAGS
CFLAGS can include flags which are not useful to the preprocessor
or can even cause it to fail. This fixes a build issue on darwin
when building for more than one architecture.
Signed-off-by: Jeremy Huddleston <jeremyhu at apple.com>
Reviewed-by: Keith Packard <keithp at keithp.com>
diff --git a/hw/xfree86/Makefile.am b/hw/xfree86/Makefile.am
index c3899b5..4f48b85 100644
--- a/hw/xfree86/Makefile.am
+++ b/hw/xfree86/Makefile.am
@@ -38,7 +38,7 @@ DIST_SUBDIRS = common ddc i2c x86emu int10 fbdevhw os-support \
bin_PROGRAMS = Xorg
nodist_Xorg_SOURCES = sdksyms.c
-AM_CFLAGS = $(DIX_CFLAGS) @XORG_CFLAGS@
+AM_CPPFLAGS = $(DIX_CFLAGS) @XORG_CFLAGS@
INCLUDES = $(XORG_INCS) -I$(srcdir)/parser -I$(top_srcdir)/miext/cw \
-I$(srcdir)/ddc -I$(srcdir)/i2c -I$(srcdir)/modes -I$(srcdir)/ramdac \
-I$(srcdir)/dri -I$(srcdir)/dri2
@@ -115,7 +115,7 @@ CLEANFILES = sdksyms.c sdksyms.dep
EXTRA_DIST += sdksyms.sh
sdksyms.dep sdksyms.c: sdksyms.sh
- $(AM_V_GEN)CPP='$(CPP)' AWK='$(AWK)' $(SHELL) $(srcdir)/sdksyms.sh $(top_srcdir) $(CFLAGS) $(AM_CFLAGS) $(INCLUDES)
+ $(AM_V_GEN)CPP='$(CPP)' AWK='$(AWK)' $(SHELL) $(srcdir)/sdksyms.sh $(top_srcdir) $(CPPFLAGS) $(AM_CPPFLAGS) $(INCLUDES)
SDKSYMS_DEP = sdksyms.dep
include $(SDKSYMS_DEP)
commit b8ab93dfbc7f292b5bfe7e9113e1af824ccbd1a8
Author: Jeremy Huddleston Sequoia <jeremyhu at apple.com>
Date: Tue Aug 28 10:06:51 2012 -0700
list: Use offsetof() and typeof() to determine member offsets within a structure
Some compilers have difficulty with the previous implementation which
relies on undefined behavior according to the C standard. Using
offsetof() from <stddef.h> (which most likely just uses
__builtin_offsetof on modern compilers) allows us to accomplish this
without ambiguity.
This fix also requires support for typeof(). If your compiler does not
support typeof(), then the old implementation will be used. If you see
failures in test/list, please try a more modern compiler.
v2: Added fallback if typeof() is not present.
Signed-off-by: Jeremy Huddleston Sequoia <jeremyhu at apple.com>
Reviewed-by: Peter Hutterer <peter.hutterer at who-t.net>
diff --git a/configure.ac b/configure.ac
index abfe727..ab89027 100644
--- a/configure.ac
+++ b/configure.ac
@@ -137,6 +137,7 @@ AC_CHECK_HEADERS([fcntl.h stdlib.h string.h unistd.h dlfcn.h stropts.h fnmatch.h
dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
+AC_C_TYPEOF
AC_C_BIGENDIAN([ENDIAN="X_BIG_ENDIAN"], [ENDIAN="X_LITTLE_ENDIAN"])
AC_CHECK_SIZEOF([unsigned long])
diff --git a/include/dix-config.h.in b/include/dix-config.h.in
index 77681a9..578f249 100644
--- a/include/dix-config.h.in
+++ b/include/dix-config.h.in
@@ -423,6 +423,9 @@
/* Define to 64-bit byteswap macro */
#undef bswap_64
+/* Define to 1 if typeof works with your compiler. */
+#undef HAVE_TYPEOF
+
/* The compiler supported TLS storage class, prefering initial-exec if tls_model is supported */
#undef TLS
diff --git a/include/list.h b/include/list.h
index d54a207..2d48a86 100644
--- a/include/list.h
+++ b/include/list.h
@@ -26,6 +26,8 @@
#ifndef _XORG_LIST_H_
#define _XORG_LIST_H_
+#include <stddef.h> /* offsetof() */
+
/**
* @file Classic doubly-link circular list implementation.
* For real usage examples of the linked list, see the file test/list.c
@@ -232,7 +234,7 @@ xorg_list_is_empty(struct xorg_list *head)
*/
#ifndef container_of
#define container_of(ptr, type, member) \
- (type *)((char *)(ptr) - (char *) &((type *)0)->member)
+ (type *)((char *)(ptr) - offsetof(type, member))
#endif
/**
@@ -271,9 +273,20 @@ xorg_list_is_empty(struct xorg_list *head)
#define xorg_list_last_entry(ptr, type, member) \
xorg_list_entry((ptr)->prev, type, member)
-#define __container_of(ptr, sample, member) \
- (void *)((char *)(ptr) \
- - ((char *)&(sample)->member - (char *)(sample)))
+#ifdef HAVE_TYPEOF
+#define __container_of(ptr, sample, member) \
+ container_of(ptr, typeof(*sample), member)
+#else
+/* This implementation of __container_of has undefined behavior according
+ * to the C standard, but it works in many cases. If your compiler doesn't
+ * support typeof() and fails with this implementation, please try a newer
+ * compiler.
+ */
+#define __container_of(ptr, sample, member) \
+ (void *)((char *)(ptr) \
+ - ((char *)&(sample)->member - (char *)(sample)))
+#endif
+
/**
* Loop through the list given by head and set pos to struct in the list.
*
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