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2cf1cdfb4e
It is impossible to create a hard link to a non existing file, so create a dummy file, create the link an delete the dummy file. On windows one cannot remove the current directory, so chdir first. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204719 91177308-0d34-0410-b5e6-96231b3b80d8
128 lines
3.5 KiB
C++
128 lines
3.5 KiB
C++
//===- unittests/LockFileManagerTest.cpp - LockFileManager tests ----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/LockFileManager.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Path.h"
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#include "gtest/gtest.h"
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#include <memory>
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using namespace llvm;
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namespace {
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TEST(LockFileManagerTest, Basic) {
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SmallString<64> TmpDir;
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error_code EC;
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EC = sys::fs::createUniqueDirectory("LockFileManagerTestDir", TmpDir);
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ASSERT_FALSE(EC);
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SmallString<64> LockedFile(TmpDir);
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sys::path::append(LockedFile, "file.lock");
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{
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// The lock file should not exist, so we should successfully acquire it.
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LockFileManager Locked1(LockedFile);
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EXPECT_EQ(LockFileManager::LFS_Owned, Locked1.getState());
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// Attempting to reacquire the lock should fail. Waiting on it would cause
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// deadlock, so don't try that.
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LockFileManager Locked2(LockedFile);
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EXPECT_NE(LockFileManager::LFS_Owned, Locked2.getState());
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}
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// Now that the lock is out of scope, the file should be gone.
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EXPECT_FALSE(sys::fs::exists(StringRef(LockedFile)));
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EC = sys::fs::remove(StringRef(TmpDir));
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ASSERT_FALSE(EC);
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}
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TEST(LockFileManagerTest, LinkLockExists) {
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SmallString<64> TmpDir;
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error_code EC;
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EC = sys::fs::createUniqueDirectory("LockFileManagerTestDir", TmpDir);
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ASSERT_FALSE(EC);
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SmallString<64> LockedFile(TmpDir);
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sys::path::append(LockedFile, "file");
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SmallString<64> FileLocK(TmpDir);
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sys::path::append(FileLocK, "file.lock");
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SmallString<64> TmpFileLock(TmpDir);
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sys::path::append(TmpFileLock, "file.lock-000");
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int FD;
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EC = sys::fs::openFileForWrite(StringRef(TmpFileLock), FD, sys::fs::F_None);
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ASSERT_FALSE(EC);
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int Ret = close(FD);
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ASSERT_EQ(Ret, 0);
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EC = sys::fs::create_link(TmpFileLock.str(), FileLocK.str());
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ASSERT_FALSE(EC);
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EC = sys::fs::remove(StringRef(TmpFileLock));
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ASSERT_FALSE(EC);
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{
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// The lock file doesn't point to a real file, so we should successfully
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// acquire it.
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LockFileManager Locked(LockedFile);
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EXPECT_EQ(LockFileManager::LFS_Owned, Locked.getState());
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}
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// Now that the lock is out of scope, the file should be gone.
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EXPECT_FALSE(sys::fs::exists(StringRef(LockedFile)));
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EC = sys::fs::remove(StringRef(TmpDir));
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ASSERT_FALSE(EC);
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}
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TEST(LockFileManagerTest, RelativePath) {
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SmallString<64> TmpDir;
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error_code EC;
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EC = sys::fs::createUniqueDirectory("LockFileManagerTestDir", TmpDir);
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ASSERT_FALSE(EC);
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char PathBuf[1024];
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const char *OrigPath = getcwd(PathBuf, 1024);
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chdir(TmpDir.c_str());
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sys::fs::create_directory("inner");
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SmallString<64> LockedFile("inner");
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sys::path::append(LockedFile, "file");
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SmallString<64> FileLock(LockedFile);
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FileLock += ".lock";
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{
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// The lock file should not exist, so we should successfully acquire it.
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LockFileManager Locked(LockedFile);
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EXPECT_EQ(LockFileManager::LFS_Owned, Locked.getState());
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EXPECT_TRUE(sys::fs::exists(FileLock.str()));
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}
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// Now that the lock is out of scope, the file should be gone.
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EXPECT_FALSE(sys::fs::exists(LockedFile.str()));
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EXPECT_FALSE(sys::fs::exists(FileLock.str()));
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EC = sys::fs::remove("inner");
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ASSERT_FALSE(EC);
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chdir(OrigPath);
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EC = sys::fs::remove(StringRef(TmpDir));
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ASSERT_FALSE(EC);
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}
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} // end anonymous namespace
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