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QT: Fix build for architectures using generic atomics 

The problem has to do with const-correctness. This has been resolved
for various architectures, but not for the generic case.

Signed-off-by: Mischa Jonker <mischa.jonker@synopsys.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Mischa Jonker 2012-11-04 01:16:14 +00:00 committed by Peter Korsgaard
parent 9d8dd5ee62
commit 19b18527d7
1 changed files with 50 additions and 0 deletions
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50
package/qt/qt-fix-const-atomics.patch Normal file
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@ -0,0 +1,50 @@
From d4d07dac01796b2aa0fb501c14865cab7e42b3a9 Mon Sep 17 00:00:00 2001
From: Mischa Jonker <mischa.jonker@synopsys.com>
Date: Sun, 4 Nov 2012 11:42:04 +0100
Subject: [PATCH] Fix const-related build error in generic atomic ops
It's still not entirely const-correct though. In all other architectures
this is obfuscated through the use of inline asm (which the compiler
doesn't check). This patch obfuscates through const_cast
---
src/corelib/arch/generic/qatomic_generic_unix.cpp | 8 ++++----
src/corelib/arch/qatomic_generic.h | 2 +-
2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/src/corelib/arch/generic/qatomic_generic_unix.cpp b/src/corelib/arch/generic/qatomic_generic_unix.cpp
index 1c6cbf0..6fce81d 100644
--- a/src/corelib/arch/generic/qatomic_generic_unix.cpp
+++ b/src/corelib/arch/generic/qatomic_generic_unix.cpp
@@ -85,13 +85,13 @@ int QBasicAtomicInt_fetchAndAddOrdered(volatile int *_q_value, int valueToAdd)
Q_CORE_EXPORT
bool QBasicAtomicPointer_testAndSetOrdered(void * volatile *_q_value,
- void *expectedValue,
- void *newValue)
+ const void *expectedValue,
+ const void *newValue)
{
bool returnValue = false;
pthread_mutex_lock(&qAtomicMutex);
if (*_q_value == expectedValue) {
- *_q_value = newValue;
+ *_q_value = const_cast<void*>(newValue);
returnValue = true;
}
pthread_mutex_unlock(&qAtomicMutex);
diff --git a/src/corelib/arch/qatomic_generic.h b/src/corelib/arch/qatomic_generic.h
index 621a767..4c14679 100644
--- a/src/corelib/arch/qatomic_generic.h
+++ b/src/corelib/arch/qatomic_generic.h
@@ -105,7 +105,7 @@ Q_CORE_EXPORT bool QBasicAtomicInt_testAndSetOrdered(volatile int *, int, int);
Q_CORE_EXPORT int QBasicAtomicInt_fetchAndStoreOrdered(volatile int *, int);
Q_CORE_EXPORT int QBasicAtomicInt_fetchAndAddOrdered(volatile int *, int);
-Q_CORE_EXPORT bool QBasicAtomicPointer_testAndSetOrdered(void * volatile *, void *, void *);
+Q_CORE_EXPORT bool QBasicAtomicPointer_testAndSetOrdered(void * volatile *, const void *, const void *);
Q_CORE_EXPORT void *QBasicAtomicPointer_fetchAndStoreOrdered(void * volatile *, void *);
Q_CORE_EXPORT void *QBasicAtomicPointer_fetchAndAddOrdered(void * volatile *, qptrdiff);
--
1.7.0.4