1 //===- Caching.h - LLVM Link Time Optimizer Configuration -----------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines the localCache function, which allows clients to add a 11 // filesystem cache to ThinLTO. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef LLVM_LTO_CACHING_H 16 #define LLVM_LTO_CACHING_H 17 18 #include "llvm/LTO/LTO.h" 19 #include <string> 20 21 namespace llvm { 22 namespace lto { 23 24 /// This type defines the callback to add a pre-existing native object file 25 /// (e.g. in a cache). 26 /// 27 /// MB->getBufferIdentifier() is a valid path for the file at the time that it 28 /// was opened, but clients should prefer to access MB directly in order to 29 /// avoid a potential race condition. 30 /// 31 /// Buffer callbacks must be thread safe. 32 typedef std::function<void(unsigned Task, std::unique_ptr<MemoryBuffer> MB)> 33 AddBufferFn; 34 35 /// Create a local file system cache which uses the given cache directory and 36 /// file callback. This function also creates the cache directory if it does not 37 /// already exist. 38 Expected<NativeObjectCache> localCache(StringRef CacheDirectoryPath, 39 AddBufferFn AddBuffer); 40 41 } // namespace lto 42 } // namespace llvm 43 44 #endif 45
