graphics: add allocator HAL support library
Add a header-only library
android.hardware.graphics.allocator@2.0-hal that can be used by
implementations. An imlpementation can
class VendorHal : public AllocatorHal { ... };
auto allocator = std::make_unique<Allocator>();
allocator->init(std::make_unique<VendorHal>(...));
Or, if vendor extensions are to be added to the IAllocator,
class AlocatorHalExt : public AllocatorHal { ... };
class VendorHal : public AllocatorHalExt { ... };
class AllocatorExt : public AllocatorImpl<IAllocatorExt, AllocatorHalExt> { ... };
auto allocator = std::make_unique<AllocatorExt>();
allocator->init(std::make_unique<VendorHal>(...));
Test: builds
Change-Id: I7cb7a4888316b871e5c49d96524b1642fc708f2d
3 files changed
