src/type3_AndroidCloud/anbox-master/external/cpu_features/include/internal/linux_features_aggregator.h

   1 // Copyright 2017 Google Inc.
   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 // CapabilityConfig provides a way to map cpu features to hardware caps and
  16 // /proc/cpuinfo flags. We then provide functions to update capabilities from
  17 // either source.
  18 #ifndef CPU_FEATURES_INCLUDE_INTERNAL_LINUX_FEATURES_AGGREGATOR_H_
  19 #define CPU_FEATURES_INCLUDE_INTERNAL_LINUX_FEATURES_AGGREGATOR_H_
  20
  21 #include <ctype.h>
  22 #include <stdint.h>
  23 #include "cpu_features_macros.h"
  24 #include "internal/hwcaps.h"
  25 #include "internal/string_view.h"
  26
  27 CPU_FEATURES_START_CPP_NAMESPACE
  28
  29 // Use the following macro to declare setter functions to be used in
  30 // CapabilityConfig.
  31 #define DECLARE_SETTER(FeatureType, FeatureName)                    \
  32   static void set_##FeatureName(void* const features, bool value) { \
  33     ((FeatureType*)features)->FeatureName = value;                  \
  34   }
  35
  36 // Describes the relationship between hardware caps and /proc/cpuinfo flags.
  37 typedef struct {
  38   const HardwareCapabilities hwcaps_mask;
  39   const char* const proc_cpuinfo_flag;
  40   void (*set_bit)(void* const, bool);  // setter for the corresponding bit.
  41 } CapabilityConfig;
  42
  43 // For every config, looks into flags_line for the presence of the
  44 // corresponding proc_cpuinfo_flag, calls `set_bit` accordingly.
  45 // Note: features is a pointer to the underlying Feature struct.
  46 void CpuFeatures_SetFromFlags(const size_t configs_size,
  47                               const CapabilityConfig* configs,
  48                               const StringView flags_line,
  49                               void* const features);
  50
  51 // For every config, looks into hwcaps for the presence of the feature. Calls
  52 // `set_bit` with true if the hardware capability is found.
  53 // Note: features is a pointer to the underlying Feature struct.
  54 void CpuFeatures_OverrideFromHwCaps(const size_t configs_size,
  55                                     const CapabilityConfig* configs,
  56                                     const HardwareCapabilities hwcaps,
  57                                     void* const features);
  58
  59 CPU_FEATURES_END_CPP_NAMESPACE
  60 #endif  // CPU_FEATURES_INCLUDE_INTERNAL_LINUX_FEATURES_AGGREGATOR_H_