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Handle failed SHM attach in XCB backing store.

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Change-Id: I5f97c0c6030d13b68cfc17d19ba969cd78f79c3f
Reviewed-on: http://codereview.qt.nokia.com/1943
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Jørgen Lind <jorgen.lind@nokia.com>
This commit is contained in:
Samuel Rødal 2011-07-21 10:54:41 +02:00 committed by Jørgen Lind
parent 7b3b6b5afa
commit e026f767c9
1 changed files with 39 additions and 15 deletions
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54
src/plugins/platforms/xcb/qxcbbackingstore.cpp
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@ -114,12 +114,18 @@ QXcbShmImage::QXcbShmImage(QXcbScreen *screen, const QSize &size, uint depth, QI
xcb_generic_error_t *error = xcb_request_check(xcb_connection(), xcb_shm_attach_checked(xcb_connection(), m_shm_info.shmseg, m_shm_info.shmid, false));
if (error) {
qWarning() << "QXcbBackingStore: Unable to attach to shared memory segment";
free(error);
}
if (shmctl(m_shm_info.shmid, IPC_RMID, 0) == -1)
qWarning() << "QXcbBackingStore: Error while marking the shared memory segment to be destroyed";
shmdt(m_shm_info.shmaddr);
shmctl(m_shm_info.shmid, IPC_RMID, 0);
m_shm_info.shmaddr = 0;
m_xcb_image->data = (uint8_t *)qMalloc(segmentSize);
} else {
if (shmctl(m_shm_info.shmid, IPC_RMID, 0) == -1)
qWarning() << "QXcbBackingStore: Error while marking the shared memory segment to be destroyed";
}
m_qimage = QImage( (uchar*) m_xcb_image->data, m_xcb_image->width, m_xcb_image->height, m_xcb_image->stride, format);
}
@ -127,14 +133,18 @@ QXcbShmImage::QXcbShmImage(QXcbScreen *screen, const QSize &size, uint depth, QI
void QXcbShmImage::destroy()
{
const int segmentSize = m_xcb_image ? (m_xcb_image->stride * m_xcb_image->height) : 0;
if (segmentSize)
if (segmentSize && m_shm_info.shmaddr)
Q_XCB_CALL(xcb_shm_detach(xcb_connection(), m_shm_info.shmseg));
xcb_image_destroy(m_xcb_image);
if (segmentSize) {
shmdt(m_shm_info.shmaddr);
shmctl(m_shm_info.shmid, IPC_RMID, 0);
if (m_shm_info.shmaddr) {
shmdt(m_shm_info.shmaddr);
shmctl(m_shm_info.shmid, IPC_RMID, 0);
} else {
qFree(m_xcb_image->data);
}
}
if (m_gc)
@ -155,18 +165,32 @@ void QXcbShmImage::put(xcb_window_t window, const QPoint &target, const QRect &s
}
Q_XCB_NOOP(connection());
xcb_image_shm_put(xcb_connection(),
if (m_shm_info.shmaddr) {
xcb_image_shm_put(xcb_connection(),
window,
m_gc,
m_xcb_image,
m_shm_info,
source.x(),
source.y(),
target.x(),
target.y(),
source.width(),
source.height(),
false);
} else {
xcb_image_t *subimage = xcb_image_subimage(m_xcb_image, source.x(), source.y(), source.width(), source.height(),
0, 0, 0);
xcb_image_put(xcb_connection(),
window,
m_gc,
m_xcb_image,
m_shm_info,
source.x(),
source.y(),
subimage,
target.x(),
target.y(),
source.width(),
source.height(),
false);
0);
xcb_image_destroy(subimage);
}
Q_XCB_NOOP(connection());
m_dirty = m_dirty | source;