| //===- DialectResourceBlobManager.cpp - Dialect Blob Management -----------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "mlir/IR/DialectResourceBlobManager.h" |
| #include "llvm/ADT/SmallString.h" |
| #include <optional> |
| |
| using namespace mlir; |
| |
| //===----------------------------------------------------------------------===// |
| // DialectResourceBlobManager |
| //===---------------------------------------------------------------------===// |
| |
| auto DialectResourceBlobManager::lookup(StringRef name) -> BlobEntry * { |
| llvm::sys::SmartScopedReader<true> reader(blobMapLock); |
| |
| auto it = blobMap.find(name); |
| return it != blobMap.end() ? &it->second : nullptr; |
| } |
| |
| void DialectResourceBlobManager::update(StringRef name, |
| AsmResourceBlob &&newBlob) { |
| BlobEntry *entry = lookup(name); |
| assert(entry && "`update` expects an existing entry for the provided name"); |
| entry->setBlob(std::move(newBlob)); |
| } |
| |
| auto DialectResourceBlobManager::insert(StringRef name, |
| std::optional<AsmResourceBlob> blob) |
| -> BlobEntry & { |
| llvm::sys::SmartScopedWriter<true> writer(blobMapLock); |
| |
| // Functor used to attempt insertion with a given name. |
| auto tryInsertion = [&](StringRef name) -> BlobEntry * { |
| auto it = blobMap.try_emplace(name, BlobEntry()); |
| if (it.second) { |
| it.first->second.initialize(it.first->getKey(), std::move(blob)); |
| return &it.first->second; |
| } |
| return nullptr; |
| }; |
| |
| // Try inserting with the name provided by the user. |
| if (BlobEntry *entry = tryInsertion(name)) |
| return *entry; |
| |
| // If an entry already exists for the user provided name, tweak the name and |
| // re-attempt insertion until we find one that is unique. |
| llvm::SmallString<32> nameStorage(name); |
| nameStorage.push_back('_'); |
| size_t nameCounter = 1; |
| do { |
| Twine(nameCounter++).toVector(nameStorage); |
| |
| // Try inserting with the new name. |
| if (BlobEntry *entry = tryInsertion(nameStorage)) |
| return *entry; |
| nameStorage.resize(name.size() + 1); |
| } while (true); |
| } |