Don't use 'using std::error_code' in include/llvm.
[oota-llvm.git] / unittests / Support / LockFileManagerTest.cpp
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 #include "gtest/gtest.h"
14 #include <memory>
15
16 using namespace llvm;
17 using std::error_code;
18
19 namespace {
20
21 TEST(LockFileManagerTest, Basic) {
22   SmallString<64> TmpDir;
23   error_code EC;
24   EC = sys::fs::createUniqueDirectory("LockFileManagerTestDir", TmpDir);
25   ASSERT_FALSE(EC);
26
27   SmallString<64> LockedFile(TmpDir);
28   sys::path::append(LockedFile, "file.lock");
29
30   {
31     // The lock file should not exist, so we should successfully acquire it.
32     LockFileManager Locked1(LockedFile);
33     EXPECT_EQ(LockFileManager::LFS_Owned, Locked1.getState());
34
35     // Attempting to reacquire the lock should fail.  Waiting on it would cause
36     // deadlock, so don't try that.
37     LockFileManager Locked2(LockedFile);
38     EXPECT_NE(LockFileManager::LFS_Owned, Locked2.getState());
39   }
40
41   // Now that the lock is out of scope, the file should be gone.
42   EXPECT_FALSE(sys::fs::exists(StringRef(LockedFile)));
43
44   EC = sys::fs::remove(StringRef(TmpDir));
45   ASSERT_FALSE(EC);
46 }
47
48 TEST(LockFileManagerTest, LinkLockExists) {
49   SmallString<64> TmpDir;
50   error_code EC;
51   EC = sys::fs::createUniqueDirectory("LockFileManagerTestDir", TmpDir);
52   ASSERT_FALSE(EC);
53
54   SmallString<64> LockedFile(TmpDir);
55   sys::path::append(LockedFile, "file");
56
57   SmallString<64> FileLocK(TmpDir);
58   sys::path::append(FileLocK, "file.lock");
59
60   SmallString<64> TmpFileLock(TmpDir);
61   sys::path::append(TmpFileLock, "file.lock-000");
62
63   int FD;
64   EC = sys::fs::openFileForWrite(StringRef(TmpFileLock), FD, sys::fs::F_None);
65   ASSERT_FALSE(EC);
66
67   int Ret = close(FD);
68   ASSERT_EQ(Ret, 0);
69
70   EC = sys::fs::create_link(TmpFileLock.str(), FileLocK.str());
71   ASSERT_FALSE(EC);
72
73   EC = sys::fs::remove(StringRef(TmpFileLock));
74   ASSERT_FALSE(EC);
75
76   {
77     // The lock file doesn't point to a real file, so we should successfully
78     // acquire it.
79     LockFileManager Locked(LockedFile);
80     EXPECT_EQ(LockFileManager::LFS_Owned, Locked.getState());
81   }
82
83   // Now that the lock is out of scope, the file should be gone.
84   EXPECT_FALSE(sys::fs::exists(StringRef(LockedFile)));
85
86   EC = sys::fs::remove(StringRef(TmpDir));
87   ASSERT_FALSE(EC);
88 }
89
90
91 TEST(LockFileManagerTest, RelativePath) {
92   SmallString<64> TmpDir;
93   error_code EC;
94   EC = sys::fs::createUniqueDirectory("LockFileManagerTestDir", TmpDir);
95   ASSERT_FALSE(EC);
96
97   char PathBuf[1024];
98   const char *OrigPath = getcwd(PathBuf, 1024);
99   chdir(TmpDir.c_str());
100
101   sys::fs::create_directory("inner");
102   SmallString<64> LockedFile("inner");
103   sys::path::append(LockedFile, "file");
104
105   SmallString<64> FileLock(LockedFile);
106   FileLock += ".lock";
107
108   {
109     // The lock file should not exist, so we should successfully acquire it.
110     LockFileManager Locked(LockedFile);
111     EXPECT_EQ(LockFileManager::LFS_Owned, Locked.getState());
112     EXPECT_TRUE(sys::fs::exists(FileLock.str()));
113   }
114
115   // Now that the lock is out of scope, the file should be gone.
116   EXPECT_FALSE(sys::fs::exists(LockedFile.str()));
117   EXPECT_FALSE(sys::fs::exists(FileLock.str()));
118
119   EC = sys::fs::remove("inner");
120   ASSERT_FALSE(EC);
121
122   chdir(OrigPath);
123
124   EC = sys::fs::remove(StringRef(TmpDir));
125   ASSERT_FALSE(EC);
126 }
127
128 } // end anonymous namespace