memset.hpp

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// Copyright (c) 2022--present, The Simons Foundation
// This file is part of TRIQS/nda and is licensed under the Apache License, Version 2.0.
// SPDX-License-Identifier: Apache-2.0
// See LICENSE in the root of this distribution for details.

 
#pragma once
 
#include "address_space.hpp"
#include "../device.hpp"
 
#include <cstring>
 
namespace nda::mem {


  template <AddressSpace AdrSp>
  void memset(void *p, int value, size_t count) {
    check_adr_sp_valid<AdrSp>();
    static_assert(nda::have_device == nda::have_cuda, "Adjust function for new device types");
 
    if constexpr (AdrSp == Host) {
      std::memset(p, value, count);
    } else {
      device_error_check(cudaMemset(p, value, count), "cudaMemset");
    }
  }

  template <AddressSpace AdrSp>
  void memset2D(void *ptr, size_t pitch, int value, size_t width, size_t height) {
    check_adr_sp_valid<AdrSp>();
    static_assert(nda::have_device == nda::have_cuda, "Adjust function for new device types");
 
    if constexpr (AdrSp == Host) {
      auto *ptri = static_cast<unsigned char *>(ptr);
      for (size_t i = 0; i < height; ++i, ptri += pitch) std::memset(ptri, value, width);
    } else { // Device or Unified
      device_error_check(cudaMemset2D(ptr, pitch, value, width, height), "cudaMemset2D");
    }
  }

 
} // namespace nda::mem