| 1 | //===- DialectResourceBlobManager.cpp - Dialect Blob Management -----------===// |
|---|---|
| 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 | #include "mlir/IR/DialectResourceBlobManager.h" |
| 10 | #include "llvm/ADT/SmallString.h" |
| 11 | #include <optional> |
| 12 | |
| 13 | using namespace mlir; |
| 14 | |
| 15 | //===----------------------------------------------------------------------===// |
| 16 | // DialectResourceBlobManager |
| 17 | //===---------------------------------------------------------------------===// |
| 18 | |
| 19 | auto DialectResourceBlobManager::lookup(StringRef name) -> BlobEntry * { |
| 20 | llvm::sys::SmartScopedReader<true> reader(blobMapLock); |
| 21 | |
| 22 | auto it = blobMap.find(Key: name); |
| 23 | return it != blobMap.end() ? &it->second : nullptr; |
| 24 | } |
| 25 | |
| 26 | void DialectResourceBlobManager::update(StringRef name, |
| 27 | AsmResourceBlob &&newBlob) { |
| 28 | BlobEntry *entry = lookup(name); |
| 29 | assert(entry && "`update` expects an existing entry for the provided name"); |
| 30 | entry->setBlob(std::move(newBlob)); |
| 31 | } |
| 32 | |
| 33 | auto DialectResourceBlobManager::insert(StringRef name, |
| 34 | std::optional<AsmResourceBlob> blob) |
| 35 | -> BlobEntry & { |
| 36 | llvm::sys::SmartScopedWriter<true> writer(blobMapLock); |
| 37 | |
| 38 | // Functor used to attempt insertion with a given name. |
| 39 | auto tryInsertion = [&](StringRef name) -> BlobEntry * { |
| 40 | auto it = blobMap.try_emplace(Key: name, Args: BlobEntry()); |
| 41 | if (it.second) { |
| 42 | it.first->second.initialize(newKey: it.first->getKey(), newBlob: std::move(blob)); |
| 43 | return &it.first->second; |
| 44 | } |
| 45 | return nullptr; |
| 46 | }; |
| 47 | |
| 48 | // Try inserting with the name provided by the user. |
| 49 | if (BlobEntry *entry = tryInsertion(name)) |
| 50 | return *entry; |
| 51 | |
| 52 | // If an entry already exists for the user provided name, tweak the name and |
| 53 | // re-attempt insertion until we find one that is unique. |
| 54 | llvm::SmallString<32> nameStorage(name); |
| 55 | nameStorage.push_back(Elt: '_'); |
| 56 | size_t nameCounter = 1; |
| 57 | do { |
| 58 | Twine(nameCounter++).toVector(Out&: nameStorage); |
| 59 | |
| 60 | // Try inserting with the new name. |
| 61 | if (BlobEntry *entry = tryInsertion(nameStorage)) |
| 62 | return *entry; |
| 63 | nameStorage.resize(N: name.size() + 1); |
| 64 | } while (true); |
| 65 | } |
| 66 |