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2f6a8ddfe8
This breaks the OpenFlags enumeration into two separate enumerations: OpenFlags and CreationDisposition. The first controls the behavior of the API depending on whether or not the target file already exists, and is not a flags-based enum. The second controls more flags-like values. This yields a more easy to understand API, while also allowing flags to be passed to the openForRead api, where most of the values didn't make sense before. This also makes the apis more testable as it becomes easy to enumerate all the configurations which make sense, so I've added many new tests to exercise all the different values. llvm-svn: 334221
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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std::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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std::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);
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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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std::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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ASSERT_FALSE(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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ASSERT_FALSE(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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