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| |
| /* !\internal |
| \class Qt3DCore::QResourceManager |
| \inmodule Qt3DCore |
| \since 5.5 |
| |
| \brief The QResourceManager allocates memory for resources that can be referenced by a QHandle. |
| |
| Using a QHandleManager for handle management, the QResourceManager's responsibility is |
| to provide memory for resources and to offer ways to interact with the resource through |
| the QHandle. |
| |
| Using the QHandle obtained when acquiring a resource, the resource can be retrieved and |
| released when no longer needed. |
| |
| Internally, memory can be reorganized for best performance while being transparent to the user. |
| |
| The memory allocation scheme and locking policies can be customized by providing template |
| parameters. The defaults are ArrayAllocatingPolicy and NonLockingPolicy respectively. |
| */ |
| |
| /* !\internal |
| \class Qt3DCore::ArrayAllocatingPolicy |
| \inmodule Qt3DCore |
| \since 5.5 |
| |
| \brief Allocates memory in a contiguous space trying to minimize fragmentation and cache misses. |
| |
| Once the maximum number of entities is reached, no more allocations can be made until some resources are |
| released |
| |
| \sa QResourceManager |
| */ |
| |
| /* !\internal |
| \class Qt3DCore::ObjectLevelLockingPolicy |
| \inmodule Qt3DCore |
| \since 5.5 |
| |
| \brief Provides locking access to a resource through the use of a QReadWriteLock. |
| |
| This policy should be used in a QResourceManager when multiple threads may access the manager for |
| read and write operations at the same time. |
| |
| It provides two convenience classes WriteLocker and ReadLocker that behave like QReadLocker and QWriteLocker. |
| */ |
| |
| #include "qresourcemanager_p.h" |
| #include <QtCore/private/qsimd_p.h> |
| #include <Qt3DCore/private/qt3dcore-config_p.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace Qt3DCore { |
| |
| void *AlignedAllocator::allocate(uint size) |
| { |
| #if QT_CONFIG(qt3d_simd_avx2) && defined(__AVX2__) && defined(QT_COMPILER_SUPPORTS_AVX2) |
| return _mm_malloc(size, 32); |
| #elif QT_CONFIG(qt3d_simd_sse2) && defined(__SSE2__) && defined(QT_COMPILER_SUPPORTS_SSE2) |
| return _mm_malloc(size, 16); |
| #else |
| return malloc(size); |
| #endif |
| } |
| |
| void AlignedAllocator::release(void *p) |
| { |
| #if QT_CONFIG(qt3d_simd_avx2) && defined(__AVX2__) && defined(QT_COMPILER_SUPPORTS_AVX2) |
| _mm_free(p); |
| #elif QT_CONFIG(qt3d_simd_sse2) && defined(__SSE2__) && defined(QT_COMPILER_SUPPORTS_SSE2) |
| _mm_free(p); |
| #else |
| free(p); |
| #endif |
| } |
| |
| } // Qt3DCore |
| |
| QT_END_NAMESPACE |