[PATCH] recipes-qt: add fix for QWSLock on qt4e

[Eric Nelson <eric.nelson@boundarydevices.com>]

This patch adds a patch for Qt-Embedded to only
destroy semaphores in the process which created
them.

Original patch by Neil Jerram for the OpenMoko project:
	http://lists.openmoko.org/pipermail/community/2012-November/067806.html

See also Bug 31254:
https://bugreports.qt-project.org/browse/QTBUG-31254

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
---
 meta/recipes-qt/qt4/qt4-4.8.5.inc                  |  1 +
 ...-Only-destroy-semaphores-in-process-owner.patch | 77 ++++++++++++++++++++++
 2 files changed, 78 insertions(+)
 create mode 100644 meta/recipes-qt/qt4/qt4-4.8.5/0028-QWSLock-Only-destroy-semaphores-in-process-owner.patch

diff --git a/meta/recipes-qt/qt4/qt4-4.8.5.inc b/meta/recipes-qt/qt4/qt4-4.8.5.inc
index 95a14f3..be16bff 100644
--- a/meta/recipes-qt/qt4/qt4-4.8.5.inc
+++ b/meta/recipes-qt/qt4/qt4-4.8.5.inc
@@ -24,6 +24,7 @@ SRC_URI = "http://download.qt-project.org/official_releases/qt/4.8/${PV}/qt-ever
            file://0022-Fix-drawing-of-0-width-polylines-from-outside-the-de.patch \
            file://0023-QHttpMultiPart-fix-data-corruption-in-readData-metho.patch \
            file://0027-tools.pro-disable-qmeegographicssystemhelper.patch \
+           file://0028-QWSLock-Only-destroy-semaphores-in-process-owner.patch \
            file://g++.conf \
            file://linux.conf \
            "
diff --git a/meta/recipes-qt/qt4/qt4-4.8.5/0028-QWSLock-Only-destroy-semaphores-in-process-owner.patch b/meta/recipes-qt/qt4/qt4-4.8.5/0028-QWSLock-Only-destroy-semaphores-in-process-owner.patch
new file mode 100644
index 0000000..d67a746
--- /dev/null
+++ b/meta/recipes-qt/qt4/qt4-4.8.5/0028-QWSLock-Only-destroy-semaphores-in-process-owner.patch
@@ -0,0 +1,77 @@
+From 9af565935d16ecf8a8c04b5ea850ddb34a7c1294 Mon Sep 17 00:00:00 2001
+From: Eric Nelson <eric.nelson@boundarydevices.com>
+Date: Mon, 12 Aug 2013 11:54:05 -0700
+Subject: [PATCH] QWSLock: Only destroy semaphores in process owner
+
+This fixes the case when QT_POSIX_IPC is not defined.
+
+Original patch by Neil Jerram for the OpenMoko project:
+	http://lists.openmoko.org/pipermail/community/2012-November/067806.html
+
+See also Bug 31254:
+	https://bugreports.qt-project.org/browse/QTBUG-31254
+
+Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
+---
+ src/gui/embedded/qwslock.cpp | 13 +++++++++----
+ src/gui/embedded/qwslock_p.h |  2 +-
+ 2 files changed, 10 insertions(+), 5 deletions(-)
+
+diff --git a/src/gui/embedded/qwslock.cpp b/src/gui/embedded/qwslock.cpp
+index 3f8f306..cd6a48d 100644
+--- a/src/gui/embedded/qwslock.cpp
++++ b/src/gui/embedded/qwslock.cpp
+@@ -83,9 +83,12 @@ QWSLock::QWSLock(int id) : semId(id)
+     QWSSignalHandler::instance()->addWSLock(this);
+ #endif
+ 
++    owned = false;
++
+ #ifndef QT_POSIX_IPC
+     if (semId == -1) {
+         semId = semget(IPC_PRIVATE, 3, IPC_CREAT | 0666);
++        owned = true;
+         if (semId == -1) {
+             perror("QWSLock::QWSLock");
+             qFatal("Unable to create semaphore");
+@@ -100,7 +103,6 @@ QWSLock::QWSLock(int id) : semId(id)
+     }
+ #else
+     sems[0] = sems[1] = sems[2] = SEM_FAILED;
+-    owned = false;
+ 
+     if (semId == -1) {
+         // ### generate really unique IDs
+@@ -134,9 +136,12 @@ QWSLock::~QWSLock()
+ 
+     if (semId != -1) {
+ #ifndef QT_POSIX_IPC
+-        qt_semun semval;
+-        semval.val = 0;
+-        semctl(semId, 0, IPC_RMID, semval);
++
++        if (owned) {
++            qt_semun semval;
++            semval.val = 0;
++            semctl(semId, 0, IPC_RMID, semval);
++        }
+         semId = -1;
+ #else
+         // emulate the SEM_UNDO behavior for the BackingStore lock
+diff --git a/src/gui/embedded/qwslock_p.h b/src/gui/embedded/qwslock_p.h
+index ead7b89..d16b3d5 100644
+--- a/src/gui/embedded/qwslock_p.h
++++ b/src/gui/embedded/qwslock_p.h
+@@ -86,8 +86,8 @@ private:
+     int lockCount[2];
+ #ifdef QT_POSIX_IPC
+     sem_t *sems[3];
+-    bool owned;
+ #endif
++    bool owned;
+ };
+ 
+ QT_END_NAMESPACE
+-- 
+1.8.1.2
+
-- 
1.8.1.2