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 /// Buffer callbacks must be thread safe.
28 typedef std::function<void(unsigned Task, std::unique_ptr<MemoryBuffer> MB)>
29     AddBufferFn;
30 
31 /// Create a local file system cache which uses the given cache directory and
32 /// file callback. This function also creates the cache directory if it does not
33 /// already exist.
34 Expected<NativeObjectCache> localCache(StringRef CacheDirectoryPath,
35                                        AddBufferFn AddBuffer);
36 
37 } // namespace lto
38 } // namespace llvm
39 
40 #endif
41