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POPassing a pointer to device memory between classes in CUDA
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  1. POPassing a pointer to device memory between classes in CUDA
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    copied!<p>I would appreciate some help involving CUDA device memory pointers. Basically I want to split my CUDA kernel code into multiple files for readability and because it is a large program. So what I want to do is be able to pass the same device memory pointers to multiple CUDA kernels, not simultaneously. Below is a rough example of what I need</p> <pre><code>//random.h class random{ public: int* dev_pointer_numbers; }; </code></pre> <p>so the object simply needs to store the pointer to device memory</p> <pre><code>//random_kernel.cu __global__ void doSomething(int *values){ //do some processing} extern "C" init_memory(int *devPtr,int *host_memory,int arraysize) { cudaMalloc(&amp;devPtr,arraysize*sizeof(int)); cudaMemcpy(devPtr,host_memory,arraysize*sizeof(int),cudaMemcpyHostToDevice); } extern "C" runKernel(int *devPtr){ doSomething&lt;&lt;&lt;1,1&gt;&gt;&gt;(devPtr); } </code></pre> <p>and the main file:</p> <pre><code>//main.cpp //ignoring all the details etc random rnd; void CUDA(int *hostArray) { init_memory(rnd.dev_pointer_numbers,hostArray,10); runKernel(rnd.dev_pointer_numbers); } </code></pre> <p>I understand that when I run the kernel code with the object pointer it isnt mapped in device memory so thats why the kernel code fails. What I want to know is how can I store to the pointer to a particular block in device memory in my main file so that it can be reused amongst other cuda kernel files?</p>
 

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