1 /* Copyright 2017 The TensorFlow Authors. All Rights Reserved. 2 3 Licensed under the Apache License, Version 2.0 (the "License"); 4 you may not use this file except in compliance with the License. 5 You may obtain a copy of the License at 6 7 http://www.apache.org/licenses/LICENSE-2.0 8 9 Unless required by applicable law or agreed to in writing, software 10 distributed under the License is distributed on an "AS IS" BASIS, 11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 See the License for the specific language governing permissions and 13 limitations under the License. 14 ==============================================================================*/ 15 #ifndef TENSORFLOW_CONTRIB_LITE_KERNELS_GEMM_SUPPORT_H_ 16 #define TENSORFLOW_CONTRIB_LITE_KERNELS_GEMM_SUPPORT_H_ 17 18 #include "public/gemmlowp.h" 19 #include "tensorflow/contrib/lite/context.h" 20 21 namespace tflite { 22 namespace gemm_support { 23 24 // Returns the GemmContext stored in 'context', allowing multiple ops to 25 // share a single object, as long as they share a TfLiteContext. The caller 26 // must ensure that this is called between IncrementUsageCounter() and 27 // DecrementUsageCounter(). For example, in the implementation of an op: 28 // void* Init(TfLiteContext* context, const char*, size_t) { 29 // gemm_support::IncrementUsageCounter(context); 30 // return nullptr; 31 // } 32 // void Free(TfLiteContext* context, void*) { 33 // gemm_support::DecrementUsageCounter(context); 34 // } 35 // TfLiteStatus Eval(TfLiteContext* context, TfLiteNode* node) { 36 // auto* gemm_context = gemm_support::GetFromContext(context); 37 // } 38 gemmlowp::GemmContext* GetFromContext(TfLiteContext* context); 39 40 // Let the framework know that the GemmContext stored in 'context' will be used 41 // by an op. If necessary a new GemmContext is created and placed in 'context'. 42 void IncrementUsageCounter(TfLiteContext* context); 43 44 // Let the framework know that the op stopped using the GemmContext stored in 45 // 'context'. If there are no more usages the GemmContext will be deleted. 46 void DecrementUsageCounter(TfLiteContext* context); 47 48 // Set the maximum number threads available for gemmlowp operations. 49 void SetMaxNumThreads(TfLiteContext* context, int num_threads); 50 51 } // namespace gemm_support 52 } // namespace tflite 53 54 #endif // TENSORFLOW_CONTRIB_LITE_KERNELS_GEMM_SUPPORT_H_ 55