ClBackend::ClBackendCustomAllocatorMemoryRegion Class Reference

#include <ClBackend.hpp>

Inheritance diagram for ClBackend::ClBackendCustomAllocatorMemoryRegion:

Collaboration diagram for ClBackend::ClBackendCustomAllocatorMemoryRegion:

Public Member Functions
	ClBackendCustomAllocatorMemoryRegion (const cl::Buffer &buffer, void *hostMemPtr, armnn::MemorySource source)
void *	ptr () override
void *	map (cl::CommandQueue &q, bool blocking) override
void	unmap (cl::CommandQueue &q) override

Detailed Description

Definition at line 213 of file ClBackend.hpp.

Constructor & Destructor Documentation

ClBackendCustomAllocatorMemoryRegion()

ClBackendCustomAllocatorMemoryRegion ( const cl::Buffer &  buffer, void *  hostMemPtr, armnn::MemorySource  source  )

inline

Definition at line 217 of file ClBackend.hpp.

            : ICLMemoryRegion(buffer.getInfo<CL_MEM_SIZE>())
        {
            _mem = buffer;
            m_HostMemPtr = hostMemPtr;
            m_MemorySource = source;
        }

Member Function Documentation

map()

void* map ( cl::CommandQueue &  q, bool  blocking  )

inlineoverride

Definition at line 231 of file ClBackend.hpp.

        {
            armnn::IgnoreUnused(q, blocking);
            if (m_HostMemPtr == nullptr)
            {
                throw armnn::Exception("ClBackend: Attempting to map memory with an invalid host ptr");
            }
            if (_mapping != nullptr)
            {
                throw armnn::Exception("ClBackend: Attempting to map memory which has not yet been unmapped");
            }
            switch (m_MemorySource)
            {
                case armnn::MemorySource::Malloc:
                    _mapping = m_HostMemPtr;
                    return _mapping;
                    break;
                case armnn::MemorySource::DmaBuf:
                case armnn::MemorySource::DmaBufProtected:
                    // If the source is a Dmabuf then the memory ptr should be pointing to an integer value for the fd
                    _mapping = mmap(NULL, _size, PROT_WRITE, MAP_SHARED, *(reinterpret_cast<int*>(m_HostMemPtr)), 0);
                    return _mapping;
                    break;
                default:
                    throw armnn::Exception("ClBackend: Attempting to map imported memory without a valid source");
                    break;
            }
        }

References armnn::DmaBuf, armnn::DmaBufProtected, armnn::IgnoreUnused(), and armnn::Malloc.

ptr()

void* ptr ( )

inlineoverride

Definition at line 226 of file ClBackend.hpp.

        {
            return nullptr;
        }

unmap()

void unmap ( cl::CommandQueue &  q )

inlineoverride

Definition at line 260 of file ClBackend.hpp.

        {
            armnn::IgnoreUnused(q);
            switch (m_MemorySource)
            {
                case armnn::MemorySource::Malloc:
                    _mapping = nullptr;
                    break;
                case armnn::MemorySource::DmaBuf:
                case armnn::MemorySource::DmaBufProtected:
                    munmap(_mapping, _size);
                    _mapping = nullptr;
                    break;
                default:
                    throw armnn::Exception("ClBackend: Attempting to unmap imported memory without a valid source");
                    break;
            }
        }

References armnn::DmaBuf, armnn::DmaBufProtected, armnn::IgnoreUnused(), and armnn::Malloc.

---

The documentation for this class was generated from the following file:

• src/backends/cl/ClBackend.hpp