1 //===- unittests/LockFileManagerTest.cpp - LockFileManager tests ----------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm/Support/LockFileManager.h" 11 #include "llvm/Support/FileSystem.h" 12 #include "llvm/Support/Path.h" 13 14 #include "gtest/gtest.h" 15 16 #include <memory> 17 18 using namespace llvm; 19 20 namespace { 21 22 TEST(LockFileManagerTest, Basic) { 23 SmallString<64> TmpDir; 24 error_code EC; 25 EC = sys::fs::createUniqueDirectory("LockFileManagerTestDir", TmpDir); 26 ASSERT_FALSE(EC); 27 28 SmallString<64> LockedFile(TmpDir); 29 sys::path::append(LockedFile, "file.lock"); 30 31 { 32 // The lock file should not exist, so we should successfully acquire it. 33 LockFileManager Locked1(LockedFile); 34 EXPECT_EQ(LockFileManager::LFS_Owned, Locked1.getState()); 35 36 // Attempting to reacquire the lock should fail. Waiting on it would cause 37 // deadlock, so don't try that. 38 LockFileManager Locked2(LockedFile); 39 EXPECT_NE(LockFileManager::LFS_Owned, Locked2.getState()); 40 } 41 42 // Now that the lock is out of scope, the file should be gone. 43 EXPECT_FALSE(sys::fs::exists(StringRef(LockedFile))); 44 45 sys::fs::remove_all(StringRef(TmpDir)); 46 } 47 48 } // end anonymous namespace 49