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Bug 703317 - non-threadsafe allocator for nsIntRegion causes TestDataStructures to fail. try=0b82febeb6ea

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This commit is contained in:
Benoit Girard 2011-11-29 13:29:03 -05:00
parent c07ed67f19
commit dfe315af0c
1 changed files with 31 additions and 6 deletions
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37
gfx/src/nsRegion.cpp
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@ -215,27 +215,52 @@ void RgnRectMemoryAllocator::Free (nsRegion::RgnRect* aRect)
// Global pool for nsRegion::RgnRect allocation
static RgnRectMemoryAllocator* gRectPool;
static PRUintn gRectPoolTlsIndex;
void RgnRectMemoryAllocatorDTOR(void *priv)
{
RgnRectMemoryAllocator* allocator = (static_cast<RgnRectMemoryAllocator*>(
PR_GetThreadPrivate(gRectPoolTlsIndex)));
delete allocator;
}
nsresult nsRegion::InitStatic()
{
gRectPool = new RgnRectMemoryAllocator(INIT_MEM_CHUNK_ENTRIES);
return !gRectPool ? NS_ERROR_OUT_OF_MEMORY : NS_OK;
return PR_NewThreadPrivateIndex(&gRectPoolTlsIndex, RgnRectMemoryAllocatorDTOR);
}
void nsRegion::ShutdownStatic()
{
delete gRectPool;
RgnRectMemoryAllocator* allocator = (static_cast<RgnRectMemoryAllocator*>(
PR_GetThreadPrivate(gRectPoolTlsIndex)));
if (!allocator)
return;
delete allocator;
PR_SetThreadPrivate(gRectPoolTlsIndex, nsnull);
}
void* nsRegion::RgnRect::operator new (size_t) CPP_THROW_NEW
{
return gRectPool->Alloc ();
RgnRectMemoryAllocator* allocator = (static_cast<RgnRectMemoryAllocator*>(
PR_GetThreadPrivate(gRectPoolTlsIndex)));
if (!allocator) {
allocator = new RgnRectMemoryAllocator(INIT_MEM_CHUNK_ENTRIES);
PR_SetThreadPrivate(gRectPoolTlsIndex, allocator);
}
return allocator->Alloc ();
}
void nsRegion::RgnRect::operator delete (void* aRect, size_t)
{
gRectPool->Free (static_cast<RgnRect*>(aRect));
RgnRectMemoryAllocator* allocator = (static_cast<RgnRectMemoryAllocator*>(
PR_GetThreadPrivate(gRectPoolTlsIndex)));
if (!allocator) {
NS_ERROR("Invalid nsRegion::RgnRect delete");
return;
}
allocator->Free (static_cast<RgnRect*>(aRect));
}