Method allocate

include/CL/opencl.hpp:3889–3920

* Allocate an SVM pointer. * * If the allocator is coarse-grained, this will take ownership to allow * containers to correctly construct data in place. */

     * containers to correctly construct data in place. 
     */
    pointer allocate(
        size_type size,
        typename cl::SVMAllocator<void, SVMTrait>::const_pointer = 0)
    {
        // Allocate memory with default alignment matching the size of the type
        void* voidPointer =
            clSVMAlloc(
            context_(),
            SVMTrait::getSVMMemFlags(),
            size*sizeof(T),
            0);
        pointer retValue = reinterpret_cast<pointer>(
            voidPointer);
#if defined(CL_HPP_ENABLE_EXCEPTIONS)
        if (!retValue) {
            std::bad_alloc excep;
            throw excep;
        }
#endif // #if defined(CL_HPP_ENABLE_EXCEPTIONS)

        // If allocation was coarse-grained then map it
        if (!(SVMTrait::getSVMMemFlags() & CL_MEM_SVM_FINE_GRAIN_BUFFER)) {
            cl_int err = enqueueMapSVM(retValue, CL_TRUE, CL_MAP_READ | CL_MAP_WRITE, size*sizeof(T));
            if (err != CL_SUCCESS) {
                std::bad_alloc excep;
                throw excep;
            }
        }

        // If exceptions disabled, return null pointer from allocator
        return retValue;
    }

    void deallocate(pointer p, size_type)
    {