tools::file_locker Class Reference

#include <util.h>

Public Member Functions
	file_locker (const std::string &filename)
	~file_locker ()
bool	locked () const

Detailed Description

Definition at line 95 of file util.h.

Constructor & Destructor Documentation

file_locker()

tools::file_locker::file_locker

(

const std::string &

filename

)

Definition at line 238 of file util.cpp.

  {
#ifdef WIN32
    m_fd = INVALID_HANDLE_VALUE;
    std::wstring filename_wide;
    try
    {
      filename_wide = string_tools::utf8_to_utf16(filename);
    }
    catch (const std::exception &e)
    {
      MERROR("Failed to convert path \"" << filename << "\" to UTF-16: " << e.what());
      return;
    }
    m_fd = CreateFileW(filename_wide.c_str(), GENERIC_READ, 0, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
    if (m_fd != INVALID_HANDLE_VALUE)
    {
      OVERLAPPED ov;
      memset(&ov, 0, sizeof(ov));
      if (!LockFileEx(m_fd, LOCKFILE_FAIL_IMMEDIATELY | LOCKFILE_EXCLUSIVE_LOCK, 0, 1, 0, &ov))
      {
        MERROR("Failed to lock " << filename << ": " << std::error_code(GetLastError(), std::system_category()));
        CloseHandle(m_fd);
        m_fd = INVALID_HANDLE_VALUE;
      }
    }
    else
    {
      MERROR("Failed to open " << filename << ": " << std::error_code(GetLastError(), std::system_category()));
    }
#else
    m_fd = open(filename.c_str(), O_RDWR | O_CREAT | O_CLOEXEC, 0666);
    if (m_fd != -1)
    {
      if (flock_exnb(m_fd) == -1)
      {
        MERROR("Failed to lock " << filename << ": " << std::strerror(errno));
        close(m_fd);
        m_fd = -1;
      }
    }
    else
    {
      MERROR("Failed to open " << filename << ": " << std::strerror(errno));
    }
#endif
  }

~file_locker()

tools::file_locker::~file_locker

(

)

Definition at line 285 of file util.cpp.

  {
    if (locked())
    {
#ifdef WIN32
      CloseHandle(m_fd);
#else
      close(m_fd);
#endif
    }
  }

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Member Function Documentation

locked()

bool tools::file_locker::locked

(

)

const

Definition at line 296 of file util.cpp.

  {
#ifdef WIN32
    return m_fd != INVALID_HANDLE_VALUE;
#else
    return m_fd != -1;
#endif
  }

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The documentation for this class was generated from the following files:

• /home/abuild/rpmbuild/BUILD/electroneum-5.1.3.1-build/electroneum-5.1.3.1/src/common/util.h
• /home/abuild/rpmbuild/BUILD/electroneum-5.1.3.1-build/electroneum-5.1.3.1/src/common/util.cpp