Public Member Functions
	InterProcessRefreshTokenLock (const std::string &path)
	~InterProcessRefreshTokenLock ()
bool	locked () const
	InterProcessRefreshTokenLock (const InterProcessRefreshTokenLock &)=delete
InterProcessRefreshTokenLock &	operator= (const InterProcessRefreshTokenLock &)=delete

Private Attributes
bool	m_locked = false
int	m_fd = -1

Detailed Description

Constructor & Destructor Documentation

◆ InterProcessRefreshTokenLock() [1/2]

Slic3r::anonymous_namespace{OrcaCloudServiceAgent.cpp}::InterProcessRefreshTokenLock::InterProcessRefreshTokenLock ( const std::string & path )

inlineexplicit

    {
        if (path.empty()) { m_locked = true; return; } // no path -> proceed unsynchronized
#if defined(_WIN32)
        const std::wstring name = L"Local\\OrcaTokenRefresh_" + std::to_wstring(std::hash<std::string>{}(path));
        m_handle = ::CreateMutexW(nullptr, FALSE, name.c_str());
        if (!m_handle) { m_locked = true; return; }               // can't create -> don't block
        const DWORD r = ::WaitForSingleObject(m_handle, INFINITE); // blocks, no spin
        m_locked = (r == WAIT_OBJECT_0 || r == WAIT_ABANDONED);    // ABANDONED: prior holder crashed
#else
        m_fd = ::open(path.c_str(), O_RDWR | O_CREAT | O_CLOEXEC, 0600);
        if (m_fd == -1) { m_locked = true; return; }              // can't open -> don't block
        int rc;
        // An fcntl lock would not block other threads in this process, and any close() of this file would release it.
        do { rc = ::flock(m_fd, LOCK_EX); } while (rc == -1 && errno == EINTR); // blocks in kernel
        m_locked = (rc != -1);
#endif
    }

References L, m_fd, and m_locked.

Referenced by InterProcessRefreshTokenLock(), and operator=().

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◆ ~InterProcessRefreshTokenLock()

Slic3r::anonymous_namespace{OrcaCloudServiceAgent.cpp}::InterProcessRefreshTokenLock::~InterProcessRefreshTokenLock ( )

inline

    {
#if defined(_WIN32)
        if (m_handle) { if (m_locked) ::ReleaseMutex(m_handle); ::CloseHandle(m_handle); }
#else
        if (m_fd != -1) ::close(m_fd); // closing the fd releases the lock we hold
#endif
    }

References m_fd, and m_locked.

◆ InterProcessRefreshTokenLock() [2/2]

Slic3r::anonymous_namespace{OrcaCloudServiceAgent.cpp}::InterProcessRefreshTokenLock::InterProcessRefreshTokenLock ( const InterProcessRefreshTokenLock & )

delete

References InterProcessRefreshTokenLock().

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Member Function Documentation

◆ locked()

bool Slic3r::anonymous_namespace{OrcaCloudServiceAgent.cpp}::InterProcessRefreshTokenLock::locked ( ) const

inline

165{ return m_locked; }

References m_locked.

◆ operator=()

InterProcessRefreshTokenLock & Slic3r::anonymous_namespace{OrcaCloudServiceAgent.cpp}::InterProcessRefreshTokenLock::operator= ( const InterProcessRefreshTokenLock & )

delete

References InterProcessRefreshTokenLock().

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Member Data Documentation

◆ m_fd

int Slic3r::anonymous_namespace{OrcaCloudServiceAgent.cpp}::InterProcessRefreshTokenLock::m_fd = -1

private

Referenced by InterProcessRefreshTokenLock(), and ~InterProcessRefreshTokenLock().

◆ m_locked

bool Slic3r::anonymous_namespace{OrcaCloudServiceAgent.cpp}::InterProcessRefreshTokenLock::m_locked = false