| 1 | // Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB). |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | /* !\internal |
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| 5 | \class Qt3DCore::QResourceManager |
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| 6 | \inmodule Qt3DCore |
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| 7 | \since 5.5 |
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| 8 | |
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| 9 | \brief The QResourceManager allocates memory for resources that can be referenced by a QHandle. |
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| 10 | |
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| 11 | Using a QHandleManager for handle management, the QResourceManager's responsibility is |
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| 12 | to provide memory for resources and to offer ways to interact with the resource through |
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| 13 | the QHandle. |
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| 14 | |
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| 15 | Using the QHandle obtained when acquiring a resource, the resource can be retrieved and |
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| 16 | released when no longer needed. |
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| 17 | |
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| 18 | Internally, memory can be reorganized for best performance while being transparent to the user. |
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| 19 | |
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| 20 | The memory allocation scheme and locking policies can be customized by providing template |
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| 21 | parameters. The defaults are ArrayAllocatingPolicy and NonLockingPolicy respectively. |
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| 22 | */ |
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| 23 | |
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| 24 | /* !\internal |
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| 25 | \class Qt3DCore::ArrayAllocatingPolicy |
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| 26 | \inmodule Qt3DCore |
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| 27 | \since 5.5 |
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| 28 | |
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| 29 | \brief Allocates memory in a contiguous space trying to minimize fragmentation and cache misses. |
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| 30 | |
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| 31 | Once the maximum number of entities is reached, no more allocations can be made until some resources are |
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| 32 | released |
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| 33 | |
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| 34 | \sa QResourceManager |
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| 35 | */ |
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| 36 | |
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| 37 | /* !\internal |
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| 38 | \class Qt3DCore::ObjectLevelLockingPolicy |
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| 39 | \inmodule Qt3DCore |
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| 40 | \since 5.5 |
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| 41 | |
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| 42 | \brief Provides locking access to a resource through the use of a QReadWriteLock. |
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| 43 | |
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| 44 | This policy should be used in a QResourceManager when multiple threads may access the manager for |
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| 45 | read and write operations at the same time. |
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| 46 | |
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| 47 | It provides two convenience classes WriteLocker and ReadLocker that behave like QReadLocker and QWriteLocker. |
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| 48 | */ |
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| 49 | |
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| 50 | #include "qresourcemanager_p.h" |
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| 51 | #include <QtCore/private/qsimd_p.h> |
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| 52 | #include <Qt3DCore/private/qt3dcore-config_p.h> |
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| 53 | |
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| 54 | QT_BEGIN_NAMESPACE |
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| 55 | |
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| 56 | namespace Qt3DCore { |
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| 57 | |
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| 58 | void *AlignedAllocator::allocate(uint size) |
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| 59 | { |
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| 60 | #if defined(__AVX2__) |
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| 61 | return _mm_malloc(size, 32); |
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| 62 | #elif defined(__SSE2__) |
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| 63 | return _mm_malloc(size: size, align: 16); |
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| 64 | #else |
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| 65 | return malloc(size); |
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| 66 | #endif |
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| 67 | } |
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| 68 | |
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| 69 | void AlignedAllocator::release(void *p) |
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| 70 | { |
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| 71 | #if defined(__SSE2__) |
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| 72 | _mm_free(p: p); |
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| 73 | #else |
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| 74 | free(p); |
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| 75 | #endif |
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| 76 | } |
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| 77 | |
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| 78 | } // Qt3DCore |
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| 79 | |
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| 80 | QT_END_NAMESPACE |
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| 81 | |
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