Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 14 | pmbaty | 1 | //===- llvm/Support/FileSystem/UniqueID.h - UniqueID for files --*- C++ -*-===// |
| 2 | // |
||
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
||
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
||
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
||
| 6 | // |
||
| 7 | //===----------------------------------------------------------------------===// |
||
| 8 | // |
||
| 9 | // This file is cut out of llvm/Support/FileSystem.h to allow UniqueID to be |
||
| 10 | // reused without bloating the includes. |
||
| 11 | // |
||
| 12 | //===----------------------------------------------------------------------===// |
||
| 13 | |||
| 14 | #ifndef LLVM_SUPPORT_FILESYSTEM_UNIQUEID_H |
||
| 15 | #define LLVM_SUPPORT_FILESYSTEM_UNIQUEID_H |
||
| 16 | |||
| 17 | #include "llvm/ADT/DenseMapInfo.h" |
||
| 18 | #include "llvm/ADT/Hashing.h" |
||
| 19 | #include <cstdint> |
||
| 20 | #include <utility> |
||
| 21 | |||
| 22 | namespace llvm { |
||
| 23 | namespace sys { |
||
| 24 | namespace fs { |
||
| 25 | |||
| 26 | class UniqueID { |
||
| 27 | uint64_t Device; |
||
| 28 | uint64_t File; |
||
| 29 | |||
| 30 | public: |
||
| 31 | UniqueID() = default; |
||
| 32 | UniqueID(uint64_t Device, uint64_t File) : Device(Device), File(File) {} |
||
| 33 | |||
| 34 | bool operator==(const UniqueID &Other) const { |
||
| 35 | return Device == Other.Device && File == Other.File; |
||
| 36 | } |
||
| 37 | bool operator!=(const UniqueID &Other) const { return !(*this == Other); } |
||
| 38 | bool operator<(const UniqueID &Other) const { |
||
| 39 | /// Don't use std::tie since it bloats the compile time of this header. |
||
| 40 | if (Device < Other.Device) |
||
| 41 | return true; |
||
| 42 | if (Other.Device < Device) |
||
| 43 | return false; |
||
| 44 | return File < Other.File; |
||
| 45 | } |
||
| 46 | |||
| 47 | uint64_t getDevice() const { return Device; } |
||
| 48 | uint64_t getFile() const { return File; } |
||
| 49 | }; |
||
| 50 | |||
| 51 | } // end namespace fs |
||
| 52 | } // end namespace sys |
||
| 53 | |||
| 54 | // Support UniqueIDs as DenseMap keys. |
||
| 55 | template <> struct DenseMapInfo<llvm::sys::fs::UniqueID> { |
||
| 56 | static inline llvm::sys::fs::UniqueID getEmptyKey() { |
||
| 57 | auto EmptyKey = DenseMapInfo<std::pair<uint64_t, uint64_t>>::getEmptyKey(); |
||
| 58 | return {EmptyKey.first, EmptyKey.second}; |
||
| 59 | } |
||
| 60 | |||
| 61 | static inline llvm::sys::fs::UniqueID getTombstoneKey() { |
||
| 62 | auto TombstoneKey = |
||
| 63 | DenseMapInfo<std::pair<uint64_t, uint64_t>>::getTombstoneKey(); |
||
| 64 | return {TombstoneKey.first, TombstoneKey.second}; |
||
| 65 | } |
||
| 66 | |||
| 67 | static hash_code getHashValue(const llvm::sys::fs::UniqueID &Tag) { |
||
| 68 | return hash_value(std::make_pair(Tag.getDevice(), Tag.getFile())); |
||
| 69 | } |
||
| 70 | |||
| 71 | static bool isEqual(const llvm::sys::fs::UniqueID &LHS, |
||
| 72 | const llvm::sys::fs::UniqueID &RHS) { |
||
| 73 | return LHS == RHS; |
||
| 74 | } |
||
| 75 | }; |
||
| 76 | |||
| 77 | } // end namespace llvm |
||
| 78 | |||
| 79 | #endif // LLVM_SUPPORT_FILESYSTEM_UNIQUEID_H |