3ac2b5c55b
Note that getTimestampFilename just constructs a file name, so it's mostly a "pure" function except possible heap allocation.
66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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 "clang/Serialization/ModuleCache.h"
|
|
|
|
#include "clang/Serialization/InMemoryModuleCache.h"
|
|
#include "clang/Serialization/ModuleFile.h"
|
|
#include "llvm/Support/FileSystem.h"
|
|
#include "llvm/Support/LockFileManager.h"
|
|
#include "llvm/Support/Path.h"
|
|
|
|
using namespace clang;
|
|
|
|
namespace {
|
|
class CrossProcessModuleCache : public ModuleCache {
|
|
InMemoryModuleCache InMemory;
|
|
|
|
public:
|
|
void prepareForGetLock(StringRef ModuleFilename) override {
|
|
// FIXME: Do this in LockFileManager and only if the directory doesn't
|
|
// exist.
|
|
StringRef Dir = llvm::sys::path::parent_path(ModuleFilename);
|
|
llvm::sys::fs::create_directories(Dir);
|
|
}
|
|
|
|
std::unique_ptr<llvm::AdvisoryLock>
|
|
getLock(StringRef ModuleFilename) override {
|
|
return std::make_unique<llvm::LockFileManager>(ModuleFilename);
|
|
}
|
|
|
|
std::time_t getModuleTimestamp(StringRef ModuleFilename) override {
|
|
llvm::sys::fs::file_status Status;
|
|
if (llvm::sys::fs::status(ModuleFilename, Status) != std::error_code{})
|
|
return 0;
|
|
return llvm::sys::toTimeT(Status.getLastModificationTime());
|
|
}
|
|
|
|
void updateModuleTimestamp(StringRef ModuleFilename) override {
|
|
// Overwrite the timestamp file contents so that file's mtime changes.
|
|
std::error_code EC;
|
|
llvm::raw_fd_ostream OS(
|
|
serialization::ModuleFile::getTimestampFilename(ModuleFilename), EC,
|
|
llvm::sys::fs::OF_TextWithCRLF);
|
|
if (EC)
|
|
return;
|
|
OS << "Timestamp file\n";
|
|
OS.close();
|
|
OS.clear_error(); // Avoid triggering a fatal error.
|
|
}
|
|
|
|
InMemoryModuleCache &getInMemoryModuleCache() override { return InMemory; }
|
|
const InMemoryModuleCache &getInMemoryModuleCache() const override {
|
|
return InMemory;
|
|
}
|
|
};
|
|
} // namespace
|
|
|
|
IntrusiveRefCntPtr<ModuleCache> clang::createCrossProcessModuleCache() {
|
|
return llvm::makeIntrusiveRefCnt<CrossProcessModuleCache>();
|
|
}
|