Skip to content

P
Paddle-Lite

PaddlePaddle / Paddle-Lite

通知 332
Star 4
Fork 1
P
Paddle-Lite
切换分支/标签
查找文件 普通视图历史永久链接Permalink
tensor.h 9.6 KB
Newer Older
朔-望's avatar
Initial commit  
朔-望 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 
/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License. */

#pragma once

#include <cstdint>
#include <cstring>
#include <memory>
#include <typeindex>
#include <vector>

#include "data_layout.h"
#include "ddim.h"
#include "memory/t_malloc.h"

namespace paddle_mobile {
namespace framework {
L
format files  
liuruilong 已提交
29 
template <typename... T> struct SizeOfTypeFunctor;
朔-望's avatar
Initial commit  
朔-望 已提交
30
L
format files  
liuruilong 已提交
31 
template <typename T> struct SizeOfTypeFunctor<T> {
朔-望's avatar
Initial commit  
朔-望 已提交
32 33 34 35 36 37 38 39 40 
  size_t operator()(std::type_index type) const {
    if (typeid(T).hash_code() == type.hash_code()) {
      return sizeof(T);
    } else {
      return 0UL;
    }
  }
};
L
format files  
liuruilong 已提交
41 
template <> struct SizeOfTypeFunctor<> {
朔-望's avatar
Initial commit  
朔-望 已提交
42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 
  size_t operator()(std::type_index type) const { return 0UL; }
};

template <typename HEAD, typename... TAIL>
struct SizeOfTypeFunctor<HEAD, TAIL...> {
  size_t operator()(std::type_index type) const {
    SizeOfTypeFunctor<HEAD> head;
    size_t head_size = head(type);
    if (head_size != 0) {
      return head_size;
    }
    SizeOfTypeFunctor<TAIL...> tail;
    return tail(type);
  }
};

static inline size_t SizeOfType(std::type_index type) {
  SizeOfTypeFunctor<int, float, double, int16_t, int64_t, bool, size_t> functor;
  size_t size = functor(type);
  //  PADDLE_ENFORCE(size != 0UL, "Cannot get size of type %s", type.name());
  return size;
}

class LoDTensor;

class Tensor {
L
format files  
liuruilong 已提交
68 
public:
朔-望's avatar
Initial commit  
朔-望 已提交
69 70 71 
  Tensor() : offset_(0) {}

  /*! Return a pointer to mutable memory block. */
L
format files  
liuruilong 已提交
72 
  template <typename T> inline T *data() {
朔-望's avatar
Initial commit  
朔-望 已提交
73 74 75 76 77 78 79 80 81 82 
    check_memory_size();
    //  PADDLE_ENFORCE(std::is_same<T, void>::value ||
    //                     holder_->type().hash_code() == typeid(T).hash_code(),
    //                 "Tensor holds the wrong type, it holds %s",
    //                 this->holder_->type().name());
    return reinterpret_cast<T *>(reinterpret_cast<uintptr_t>(holder_->ptr()) +
                                 offset_);
  }

  /*! Return a pointer to constant memory block. */
L
format files  
liuruilong 已提交
83 
  template <typename T> inline const T *data() const {
朔-望's avatar
Initial commit  
朔-望 已提交
84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 
    check_memory_size();
    //  PADDLE_ENFORCE(std::is_same<T, void>::value ||
    //                     holder_->type().hash_code() == typeid(T).hash_code(),
    //                 "Tensor holds the wrong type, it holds %s",
    //                 this->holder_->type().name());

    return reinterpret_cast<const T *>(
        reinterpret_cast<uintptr_t>(holder_->ptr()) + offset_);
  }

  inline bool IsInitialized() const { return holder_ != nullptr; }

  /**
   * @brief   Return a pointer to mutable memory block.
   * @note    If not exist, then allocation.
   */
L
format files  
liuruilong 已提交
100 
  template <typename T> inline T *mutable_data() {
朔-望's avatar
Initial commit  
朔-望 已提交
101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 
    static_assert(std::is_pod<T>::value, "T must be POD");
    return reinterpret_cast<T *>(mutable_data(typeid(T)));
  }

  inline void *mutable_data(std::type_index type) {
    if (holder_ != nullptr) {
      holder_->set_type(type);
    }
    //  PADDLE_ENFORCE_GE(numel(), 0,
    //                    "When calling this method, the Tensor's numel must be
    //                    " "equal or larger than zero. " "Please check
    //                    Tensor::Resize has been called first.");
    int64_t size = numel() * SizeOfType(type);
    /* some versions of boost::variant don't have operator!= */
    if (holder_ == nullptr || holder_->size() < size + offset_) {
      holder_.reset(new PlaceholderImpl(size, type));

      offset_ = 0;
    }
    return reinterpret_cast<void *>(
        reinterpret_cast<uintptr_t>(holder_->ptr()) + offset_);
  }

  inline void *mutable_data() {
    //  PADDLE_ENFORCE(this->holder_ != nullptr,
    //                 "Cannot invoke mutable data if current hold nothing.");
    return mutable_data(holder_->type());
  }

  /**
   * @brief     Return a pointer to mutable memory block.
   *
   * @param[in] dims    The dimensions of the memory block.
   * @param[in] place   The place of the memory block.
   *
   * @note      If not exist, then allocation.
   */
L
format files  
liuruilong 已提交
138 
  template <typename T> inline T *mutable_data(DDim dims) {
朔-望's avatar
Initial commit  
朔-望 已提交
139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 
    static_assert(std::is_pod<T>::value, "T must be POD");
    Resize(dims);
    return mutable_data<T>();
  }

  /*! Return the dimensions of the memory block. */
  inline const DDim &dims() const { return dims_; }

  /*! Return the numel of the memory block. */
  inline int64_t numel() const { return product(dims_); }

  /*! Resize the dimensions of the memory block. */
  inline Tensor &Resize(const DDim &dims) {
    dims_ = dims;
    return *this;
  }

  /*! The internal of two tensors share the same memory block. */
  inline Tensor &ShareDataWith(const Tensor &src) {
    src.check_memory_size();
    *this = src;
    return *this;
  }

  /**
   * @brief  Return a sub-tensor of the given tensor.
   *
   * @param[in] begin_idx   The index of the start row(inclusive) to slice.
   *                        The index number begins from 0.
   * @param[in] end_idx     The index of the end row(exclusive) to slice.
   *                        The index number begins from 0.
   */
  inline Tensor Slice(int begin_idx, int end_idx) const {
    check_memory_size();
    //  PADDLE_ENFORCE_GE(begin_idx, 0,
    //                    "The start row index must be greater than 0.");
    //  PADDLE_ENFORCE_LE(end_idx, dims_[0], "The end row index is out of
    //  bound."); PADDLE_ENFORCE_LT(
    //      begin_idx, end_idx,
    //      "The start row index must be lesser than the end row index.");

    if (dims_[0] == 1) {
      return *this;
    } else {
      size_t base = numel() / dims_[0];
      Tensor dst;
      dst.holder_ = holder_;
      dst.set_layout(layout_);
      DDim dst_dims = dims_;
      dst_dims[0] = end_idx - begin_idx;
      dst.Resize(dst_dims);
      dst.offset_ = offset_ + begin_idx * base * SizeOfType(type());
      return dst;
    }
  }

  std::type_index type() const {
    //                PADDLE_ENFORCE_NOT_NULL(
    //                        holder_, "Tensor not initialized yet when
    //                        Tensor::type() is called.");
    return holder_->type();
  }

  // memory size returns the holding memory size in byte.
  size_t memory_size() const {
    return holder_ == nullptr ? 0UL : holder_->size() - offset_;
  }

  inline void check_memory_size() const {
    //  PADDLE_ENFORCE_NOT_NULL(
    //      holder_, "Tensor holds no memory. Call Tensor::mutable_data
    //      first.");
    //  PADDLE_ENFORCE_LE(
    //      numel() * SizeOfType(type()), memory_size(),
    //      "Tensor's dims_ is out of bound. Call Tensor::mutable_data "
    //      "first to re-allocate memory.\n"
    //      "or maybe the required data-type mismatches the data already
    //      stored.");
  }

  inline DataLayout layout() const { return layout_; }

  inline void set_layout(const DataLayout layout) { layout_ = layout; }
L
format files  
liuruilong 已提交
223 
private:
朔-望's avatar
Initial commit  
朔-望 已提交
224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 
  /**
   * @note    Placeholder hides type T, so it doesn't appear as a template
   *          parameter of Variable.
   */
  struct Placeholder {
    virtual ~Placeholder() = default;

    virtual void *ptr() const = 0;

    virtual size_t size() const = 0;

    virtual std::type_index type() const = 0;

    virtual void set_type(std::type_index type) = 0;
  };

  struct PlaceholderImpl : public Placeholder {
    PlaceholderImpl(size_t size, std::type_index type)
        : ptr_(static_cast<uint8_t *>(memory::Alloc(size)),
               memory::PODDeleter<uint8_t>()),
L
format files  
liuruilong 已提交
244 
          size_(size), type_(type) {
朔-望's avatar
Initial commit  
朔-望 已提交
245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 
      //                    PADDLE_ENFORCE_NOT_NULL(ptr_, "Insufficient %s
      //                    memory to allocation.",
      //                                            (is_cpu_place(place_) ?
      //                                            "CPU" : "GPU"));
    }

    virtual size_t size() const { return size_; }

    virtual void *ptr() const { return static_cast<void *>(ptr_.get()); }

    virtual std::type_index type() const { return type_; }

    virtual void set_type(std::type_index type) { type_ = type; }

    /*! the pointer of memory block. */
    std::unique_ptr<uint8_t, memory::PODDeleter<uint8_t>> ptr_;

    /*! the size of memory block. */
    size_t size_;

    /* the current type of memory */
    std::type_index type_;
  };

  /*! holds the memory block if allocated. */
  std::shared_ptr<Placeholder> holder_;

  /**
   * @brief points to elements dimensions.
   *
   * @note dims_ do not indicate the memory block size.
   */

  DDim dims_;

  /**
   * @brief the layout of memory block, default is NHWC.
   *
   * @note the memory allocation order, describe how weight/data is stored
   *       For example, in 4-D Tensor(rank=4), there are three commonly
   *       used layout. They are
   *            NCHW, NHWC, CHWN.
   *       N,C,H,W for respectively the batch size, the number of
   *       feature maps, the height, the width.
   */

  DataLayout layout_ = DataLayout::kNHWC;

  /**
   * @brief   A PlaceHolder may be shared by more than one tensor.
   *
   * @note    Some of them may be slices of the others. So the offset_
   *          is introduced here to indicate the byte offset between
   *          PlaceHolder::ptr_ and where the tensor data really begins.
   */
  size_t offset_;
};

inline Tensor ReshapeToMatrix(const Tensor &src, int num_col_dims) {
  Tensor res;
  res.ShareDataWith(src);
  res.Resize(flatten_to_2d(src.dims(), num_col_dims));
  return res;
}
L
format files  
liuruilong 已提交
310 311 
} // namespace framework
} // namespace paddle_mobile