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 /// Path is generally expected to be a valid path for the file at the point when 28 /// the AddBufferFn function is called, but clients should prefer to access MB 29 /// directly in order to 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 StringRef Path)> 34 AddBufferFn; 35 36 /// Create a local file system cache which uses the given cache directory and 37 /// file callback. This function also creates the cache directory if it does not 38 /// already exist. 39 Expected<NativeObjectCache> localCache(StringRef CacheDirectoryPath, 40 AddBufferFn AddBuffer); 41 42 } // namespace lto 43 } // namespace llvm 44 45 #endif 46
