void
OMR::SystemSegmentProvider::release(TR::MemorySegment &segment) throw()
{
auto it = _segments.find(segment);
_rawAllocator.deallocate(segment.base());
_currentBytesAllocated -= segment.size();
TR_ASSERT(it != _segments.end(), "Segment lookup should never fail");
_segments.erase(it);
}
void
TR::DebugSegmentProvider::release(TR::MemorySegment &segment) throw()
{
#if defined(LINUX) || defined(__APPLE__) || defined(_AIX)
void * remap = mmap(segment.base(), segment.size(), PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0);
TR_ASSERT(remap == segment.base(), "Remapping of memory failed!");
#elif defined(_WIN32)
VirtualFree(segment.base(), segment.size(), MEM_DECOMMIT);
VirtualAlloc(segment.base(), segment.size(), MEM_COMMIT, PAGE_NOACCESS);
#else
memset(segment.base(), 0xEF, segment.size());
#endif
}
void
TR::SegmentPool::release(TR::MemorySegment &segment) throw()
{
if (
segment.size() == defaultSegmentSize()
&& _storedSegments < _poolSize
)
{
try
{
_segmentStack.push(TR::ref(segment));
++_storedSegments;
}
catch (...)
{
_backingProvider.release(segment);
}
}
else
{
_backingProvider.release(segment);
}
}