//C++ TO C# CONVERTER TODO TASK: C# has no equivalent to ' = delete':
// FileMappedVector(const FileMappedVector&) = delete;
//C++ TO C# CONVERTER TODO TASK: C# has no equivalent to ' = delete':
// FileMappedVector& operator =(const FileMappedVector&) = delete;
public void open(string path, FileMappedVectorOpenMode mode = FileMappedVectorOpenMode.OPEN_OR_CREATE, ulong prefixSize = 0)
{
Debug.Assert(!isOpened());
const ulong initialCapacity = 10;
boost::filesystem.path filePath = path;
boost::filesystem.path bakPath = path + ".bak";
bool fileExists;
if (boost::filesystem.exists(filePath))
{
if (boost::filesystem.exists(bakPath))
{
boost::filesystem.remove(bakPath);
}
fileExists = true;
}
else if (boost::filesystem.exists(bakPath))
{
boost::filesystem.rename(bakPath, filePath);
fileExists = true;
}
else
{
fileExists = false;
}
if (mode == FileMappedVectorOpenMode.OPEN)
{
open(path, new ulong(prefixSize));
}
else if (mode == FileMappedVectorOpenMode.CREATE)
{
create(path, new ulong(initialCapacity), new ulong(prefixSize), 0);
}
else if (mode == FileMappedVectorOpenMode.OPEN_OR_CREATE)
{
if (fileExists)
{
open(path, new ulong(prefixSize));
}
else
{
create(path, new ulong(initialCapacity), new ulong(prefixSize), 0);
}
}
else
{
throw new System.Exception("FileMappedVector: Unsupported open mode: " + Convert.ToString((int)mode));
}
}
//C++ TO C# CONVERTER TODO TASK: The original C++ template specifier was replaced with a C# generic specifier, which may not produce the same behavior:
//ORIGINAL LINE: template<class F>
//C++ TO C# CONVERTER TODO TASK: 'rvalue references' have no equivalent in C#:
private void atomicUpdate0 <F>(ulong newCapacity, ulong newPrefixSize, ulong newSuffixSize, F&& func)
{
if (m_file.path() != m_path)
{
throw new System.Exception("Vector is mapped to a .bak file due to earlier errors");
}
boost::filesystem.path bakPath = m_path + ".bak";
boost::filesystem.path tmpPath = boost::filesystem.unique_path(m_path + ".tmp.%%%%-%%%%");
if (boost::filesystem.exists(bakPath))
{
boost::filesystem.remove(bakPath);
}
Tools.ScopeExit tmpFileDeleter(() =>
{
boost::system.error_code ignore = new boost::system.error_code();
boost::filesystem.remove(tmpPath, ignore);
});
// Copy file. It is slow but atomic operation
FileMappedVector <T> tmpVector = new FileMappedVector <T>();
tmpVector.create(tmpPath.string(), new ulong(newCapacity), new ulong(newPrefixSize), new ulong(newSuffixSize));
func(tmpVector);
tmpVector.flush();
// Swap files
std::error_code ec = new std::error_code();
std::error_code ignore = new std::error_code();
m_file.rename(bakPath.string());
tmpVector.rename(m_path, ec);
if (ec != null)
{
// Try to restore and ignore errors
m_file.rename(m_path, ignore);
throw std::system_error(ec, "Failed to swap temporary and vector files");
}
m_path = bakPath.string();
swap(tmpVector);
tmpFileDeleter.cancel();
// Remove .bak file and ignore errors
tmpVector.close(ignore);
boost::system.error_code boostError = new boost::system.error_code();
boost::filesystem.remove(bakPath, boostError);
}
