Line data    Source code

       1             : // Copyright 2018 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #ifndef V8_WASM_WASM_IMPORT_WRAPPER_CACHE_H_
       6             : #define V8_WASM_WASM_IMPORT_WRAPPER_CACHE_H_
       7             : 
       8             : #include "src/base/platform/mutex.h"
       9             : #include "src/compiler/wasm-compiler.h"
      10             : 
      11             : namespace v8 {
      12             : namespace internal {
      13             : 
      14             : class Counters;
      15             : 
      16             : namespace wasm {
      17             : 
      18             : class WasmCode;
      19             : class WasmEngine;
      20             : 
      21             : using FunctionSig = Signature<ValueType>;
      22             : 
      23             : // Implements a cache for import wrappers.
      24             : class WasmImportWrapperCache {
      25             :  public:
      26             :   ~WasmImportWrapperCache();
      27             : 
      28             :   V8_EXPORT_PRIVATE WasmCode* GetOrCompile(WasmEngine* wasm_engine,
      29             :                                            Counters* counters,
      30             :                                            compiler::WasmImportCallKind kind,
      31             :                                            FunctionSig* sig);
      32             : 
      33             :  private:
      34             :   friend class NativeModule;
      35             :   using CacheKey = std::pair<uint8_t, FunctionSig>;
      36             : 
      37             :   mutable base::Mutex mutex_;
      38             :   NativeModule* native_module_;
      39             :   std::unordered_map<CacheKey, WasmCode*, base::hash<CacheKey>> entry_map_;
      40             : 
      41             :   explicit WasmImportWrapperCache(NativeModule* native_module)
      42     1242981 :       : native_module_(native_module) {}
      43             : };
      44             : 
      45             : }  // namespace wasm
      46             : }  // namespace internal
      47             : }  // namespace v8
      48             : 
      49             : #endif  // V8_WASM_WASM_IMPORT_WRAPPER_CACHE_H_