1 files changed, 88 insertions, 0 deletions
diff --git a/compiler/nnkit-onnxrt/support/src/Allocator.cpp b/compiler/nnkit-onnxrt/support/src/Allocator.cpp
new file mode 100644
index 000000000..331f4ec50
--- /dev/null
+++ b/compiler/nnkit-onnxrt/support/src/Allocator.cpp
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd. 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.
+ */
+
+#include "nnkit/support/onnx/Allocator.h"
+#include "nnkit/support/onnx/Status.h"
+
+#include <stdexcept>
+
+namespace nnkit
+{
+namespace support
+{
+namespace onnx
+{
+
+Allocator::Allocator(void)
+{
+  OrtAllocator::version = ORT_API_VERSION;
+  OrtAllocator::Alloc = [](OrtAllocator *this_, size_t size) {
+    return static_cast<Allocator *>(this_)->Alloc(size);
+  };
+  OrtAllocator::Free = [](OrtAllocator *this_, void *p) {
+    static_cast<Allocator *>(this_)->Free(p);
+  };
+  OrtAllocator::Info = [](const OrtAllocator *this_) {
+    return static_cast<const Allocator *>(this_)->Info();
+  };
+
+  Status status;
+  status = OrtCreateCpuAllocatorInfo(OrtDeviceAllocator, OrtMemTypeDefault, &_cpu_allocator_info);
+  status.throwOnError();
+}
+
+Allocator::~Allocator(void) { OrtReleaseAllocatorInfo(_cpu_allocator_info); }
+
+void *Allocator::Alloc(size_t size)
+{
+  // NOTE The extra_len is added to check resource leak.
+  //
+  //      This Alloc function will allocate the given size with extra_len.
+  //      The first extra_len will save the allocated memory size and
+  //      the user will use address from the allocated memory plus extra_len.
+  //      The size value that saved in extra_len is used to Free function
+  //      to check resource leak. The size value uses in _memory_inuse.
+  constexpr size_t extra_len = sizeof(size_t);
+  _memory_inuse.fetch_add(size += extra_len);
+  void *p = ::malloc(size);
+  *(size_t *)p = size;
+  return (char *)p + extra_len;
+}
+
+void Allocator::Free(void *p)
+{
+  constexpr size_t extra_len = sizeof(size_t);
+  if (!p)
+    return;
+  p = (char *)p - extra_len;
+  size_t len = *(size_t *)p;
+  _memory_inuse.fetch_sub(len);
+  return ::free(p);
+}
+
+const OrtAllocatorInfo *Allocator::Info(void) const { return _cpu_allocator_info; }
+
+void Allocator::LeakCheck(void)
+{
+  if (_memory_inuse.load())
+  {
+    throw std::runtime_error{"memory leak!!!"};
+  }
+}
+
+} // namespace onnx
+} // namespace support
+} // namespace nnkit