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//===----------------------------------------------------------------------===//
//
// 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>();
}
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