LStoreFile Class Reference

#include <LStoreFile.h>

Inheritance diagram for LStoreFile:

Classes
class	MutexWrapper

Public Member Functions
virtual void	abort (void)
virtual void	close (void)
virtual void	create (const char *name, bool exclusive=false, int perms=0666)
virtual void	create (const std::string &name, bool exclusive=false, int perms=0666)
	LStoreFile (void)
	LStoreFile (void *fd)
	LStoreFile (const char *name, int flags=IOFlags::OpenRead, int perms=0666)
	LStoreFile (const std::string &name, int flags=IOFlags::OpenRead, int perms=0666)
virtual void	open (const char *name, int flags=IOFlags::OpenRead, int perms=0666)
virtual void	open (const std::string &name, int flags=IOFlags::OpenRead, int perms=0666)
virtual IOOffset	position (IOOffset offset, Relative whence=SET)
virtual IOSize	read (void *into, IOSize n)
virtual void	resize (IOOffset size)
virtual IOSize	write (const void *from, IOSize n)
	~LStoreFile (void)
Public Member Functions inherited from Storage
virtual bool	eof (void) const
virtual void	flush (void)
virtual IOOffset	position (void) const
virtual bool	prefetch (const IOPosBuffer *what, IOSize n)
virtual IOSize	read (void *into, IOSize n, IOOffset pos)
IOSize	read (IOBuffer into, IOOffset pos)
virtual IOSize	readv (IOPosBuffer *into, IOSize buffers)
virtual void	rewind (void)
virtual IOOffset	size (void) const
	Storage (void)
virtual IOSize	write (const void *from, IOSize n, IOOffset pos)
IOSize	write (IOBuffer from, IOOffset pos)
virtual IOSize	writev (const IOPosBuffer *from, IOSize buffers)
virtual	~Storage (void)
Public Member Functions inherited from IOInput
int	read (void)
IOSize	read (IOBuffer into)
virtual IOSize	readv (IOBuffer *into, IOSize buffers)
IOSize	xread (IOBuffer into)
IOSize	xread (void *into, IOSize n)
IOSize	xreadv (IOBuffer *into, IOSize buffers)
virtual	~IOInput (void)
	Destruct the stream. A no-op. More...
Public Member Functions inherited from IOOutput
IOSize	write (unsigned char byte)
IOSize	write (IOBuffer from)
virtual IOSize	writev (const IOBuffer *from, IOSize buffers)
IOSize	xwrite (const void *from, IOSize n)
IOSize	xwrite (IOBuffer from)
IOSize	xwritev (const IOBuffer *from, IOSize buffers)
virtual	~IOOutput (void)
	Destruct the stream. A no-op. More...

Static Public Attributes
static pthread_mutex_t	m_dlopen_lock = PTHREAD_MUTEX_INITIALIZER

Private Member Functions
void	closeLibrary ()
void	loadLibrary ()

Private Attributes
bool	m_close
void *	m_fd
bool	m_is_loaded
void *	m_library_handle
std::string	m_name
int32_t(*	redd_close )(void *)
int32_t(*	redd_errno )()
int32_t(*	redd_init )()
int64_t(*	redd_lseek )(void *, int64_t, uint32_t)
void *(*	redd_open )(const char *, int32_t, int32_t)
int64_t(*	redd_read )(void *, char *, int64_t)
const std::string &(*	redd_strerror )()
int32_t(*	redd_term )()
int64_t(*	redd_write )(void *, const char *, int64_t)

Additional Inherited Members
Public Types inherited from Storage
enum	Relative { SET, CURRENT, END }

Detailed Description

Definition at line 8 of file LStoreFile.h.

Constructor & Destructor Documentation

LStoreFile::LStoreFile

(

void

)

Definition at line 16 of file LStoreFile.cc.

References loadLibrary().

  : m_fd (NULL),
    m_close (false),
    m_is_loaded(false)
{
    loadLibrary();  
}

LStoreFile::LStoreFile

(

void *

fd

)

Definition at line 24 of file LStoreFile.cc.

References loadLibrary().

  : m_fd (fd),
    m_close (true),
    m_is_loaded(false)
{
    loadLibrary();  
}

LStoreFile::LStoreFile	(	const char *	name,
		int	flags = IOFlags::OpenRead,
		int	perms = 0666
	)

Definition at line 32 of file LStoreFile.cc.

References loadLibrary(), and open().

  : m_fd (NULL),
    m_close (false),
    m_is_loaded(false)
{   loadLibrary();
    open (name, flags, perms); }

LStoreFile::LStoreFile	(	const std::string &	name,
		int	flags = IOFlags::OpenRead,
		int	perms = 0666
	)

Definition at line 41 of file LStoreFile.cc.

References flags, loadLibrary(), and open().

  : m_fd (NULL),
    m_close (false),
    m_is_loaded(false)
{   loadLibrary();
    open (name.c_str (), flags, perms); }

LStoreFile::~LStoreFile

(

void

)

Definition at line 50 of file LStoreFile.cc.

References closeLibrary(), m_close, and m_name.

{
  if (m_close)
    edm::LogError("LStoreFileError")
      << "Destructor called on LStore file '" << m_name
      << "' but the file is still open";
  closeLibrary();
}

Member Function Documentation

void LStoreFile::abort ( void  )

virtual

Definition at line 255 of file LStoreFile.cc.

References m_close, m_fd, and NULL.

{
  if (m_fd != NULL)
    (*redd_close) (m_fd);

  m_close = false;
  m_fd = NULL;
}

void LStoreFile::close ( void  )

virtual

Reimplemented from Storage.

Definition at line 230 of file LStoreFile.cc.

References m_close, m_fd, m_name, NULL, redd_close, and redd_errno.

Referenced by python.Vispa.Gui.BoxContentDialog.BoxContentDialog::keyPressEvent(), python.Vispa.Gui.FindDialog.FindDialog::keyPressEvent(), and open().

{
  if (m_fd == NULL)
  {
    edm::LogError("LStoreFileError")
      << "LStoreFile::close(name='" << m_name
      << "') called but the file is not open";
    m_close = false;
    return;
  }
  edm::LogInfo("LStoreFile::close()") << "closing " << m_name << std::endl;
  if ((*redd_close) (m_fd) == -1)
    edm::LogWarning("LStoreFileWarning")
      << "redd_close(name='" << m_name
      << "') failed with error '" << (*redd_strerror) ()
      << "' (redd_errno=" << (*redd_errno)() << ")";

  m_close = false;
  m_fd = NULL;

  // Caused hang.  Will be added back after problem is fixed.
  // edm::LogInfo("LStoreFileInfo") << "Closed " << m_name;
}

void LStoreFile::closeLibrary ( )

private

Definition at line 111 of file LStoreFile.cc.

References edm::hlt::Exception, m_dlopen_lock, m_is_loaded, m_library_handle, NULL, and redd_term.

Referenced by ~LStoreFile().

                              {
    try {
        LStoreFile::MutexWrapper lockObj( & this->m_dlopen_lock );
        
        // What is the correct idiom for propagating error messages 
        // in functions that are exclusively called in destructors?
        // Seriously. I have no idea
        // melo
        if ( m_is_loaded ) {
            if ( (*redd_term)() ) {
                throw cms::Exception("LStoreFile::closeLibrary()")
                    << "Error in redd_term: " << (*redd_strerror)();
            }
        }
        if ( m_library_handle != NULL ) {
            if ( dlclose( m_library_handle ) ) {
                throw cms::Exception("LStoreFile::closeLibrary()")
                    << "Error on dlclose(): " << dlerror();
            }
        }
    } catch (cms::Exception & e) {
        edm::LogError("LStoreFileError")
          << "LStoreFile had an error in its destructor: " << e;
    }
    m_is_loaded = false;
}

void LStoreFile::create ( const char *  name, bool  exclusive = false, int  perms = 0666  )

virtual

Definition at line 141 of file LStoreFile.cc.

References open(), IOFlags::OpenCreate, IOFlags::OpenExclusive, IOFlags::OpenTruncate, and IOFlags::OpenWrite.

{
  open (name,
        (IOFlags::OpenCreate | IOFlags::OpenWrite | IOFlags::OpenTruncate
         | (exclusive ? IOFlags::OpenExclusive : 0)),
        perms);
}

void LStoreFile::create ( const std::string &  name, bool  exclusive = false, int  perms = 0666  )

virtual

Definition at line 152 of file LStoreFile.cc.

References open(), IOFlags::OpenCreate, IOFlags::OpenExclusive, IOFlags::OpenTruncate, and IOFlags::OpenWrite.

{
  open (name.c_str (),
        (IOFlags::OpenCreate | IOFlags::OpenWrite | IOFlags::OpenTruncate
         | (exclusive ? IOFlags::OpenExclusive : 0)),
        perms);
}

void LStoreFile::loadLibrary ( )

private

Definition at line 75 of file LStoreFile.cc.

References edm::hlt::Exception, m_dlopen_lock, m_is_loaded, m_library_handle, NULL, redd_errno, redd_init, REDD_LOAD_SYMBOL, redd_lseek, redd_open, redd_read, redd_strerror, redd_term, and redd_write.

Referenced by LStoreFile().

                             {
    edm::LogError("LStoreFile::loadLibrary()") << "Loading library\n";
    LStoreFile::MutexWrapper lockObj( & this->m_dlopen_lock );
    // until ACCRE removes the java dependency from their client libs,
    // we'll dlopen() them so they don't need to be brought along with cmssw
    // if you're running LStore at your site, you will have the libs anyway
    // TODO add wrappers to make this work in OSX as well (CMSSW's getting ported?)
    // TODO   should be easy, just need to know the "proper" way to do #if OSX
    // -Melo

    m_library_handle =
         dlopen("libreddnet.so", RTLD_LAZY);
    if (m_library_handle == NULL) {
        throw cms::Exception("LStoreFile::loadLibrary()")
            << "Can't dlopen() LStore libraries: " << dlerror();
    }

    char * retval = NULL;
    // Explicitly state the size of these values, keeps weird 64/32 bit stuff away
    REDD_LOAD_SYMBOL( redd_init, int32_t(*)()); 
    REDD_LOAD_SYMBOL( redd_read, int64_t(*)(void *, char*, int64_t));
    REDD_LOAD_SYMBOL( redd_lseek, int64_t(*)(void*, int64_t, uint32_t));
    REDD_LOAD_SYMBOL( redd_open, void*(*)(const char*,int,int));
    REDD_LOAD_SYMBOL( redd_write, int64_t(*)(void *, const char *, int64_t));
    REDD_LOAD_SYMBOL( redd_term, int32_t(*)());
    REDD_LOAD_SYMBOL( redd_errno,  int32_t(*)());
    REDD_LOAD_SYMBOL( redd_strerror, const std::string & (*)());

    if ( (*redd_init)() ) {
        throw cms::Exception("LStoreFile::loadLibrary()")
            << "Error in redd_init: " << (*redd_strerror)();
    }
    m_is_loaded = true;

}

void LStoreFile::open ( const char *  name, int  flags = IOFlags::OpenRead, int  perms = 0666  )

virtual

Definition at line 169 of file LStoreFile.cc.

References close(), edm::hlt::Exception, m_close, m_fd, m_name, mergeVDriftHistosByStation::name, NULL, O_NONBLOCK, IOFlags::OpenAppend, IOFlags::OpenCreate, IOFlags::OpenExclusive, IOFlags::OpenNonBlock, IOFlags::OpenRead, IOFlags::OpenTruncate, IOFlags::OpenWrite, redd_errno, and redd_open.

Referenced by create(), LStoreFile(), and open().

{
  m_name = name;

  // Actual open
  if ((name == 0) || (*name == 0))
    throw cms::Exception("LStoreFile::open()")
      << "Cannot open a file without a name";

  if ((flags & (IOFlags::OpenRead | IOFlags::OpenWrite)) == 0)
    throw cms::Exception("LStoreFile::open()")
      << "Must open file '" << name << "' at least for read or write";

  // If I am already open, close old file first
  if (m_fd != NULL && m_close)
    close ();

  // Translate our flags to system flags
  int openflags = 0;

  if ((flags & IOFlags::OpenRead) && (flags & IOFlags::OpenWrite))
    openflags |= O_RDWR;
  else if (flags & IOFlags::OpenRead)
    openflags |= O_RDONLY;
  else if (flags & IOFlags::OpenWrite)
    openflags |= O_WRONLY;

  if (flags & IOFlags::OpenNonBlock)
    openflags |= O_NONBLOCK;

  if (flags & IOFlags::OpenAppend)
    openflags |= O_APPEND;

  if (flags & IOFlags::OpenCreate)
    openflags |= O_CREAT;

  if (flags & IOFlags::OpenExclusive)
    openflags |= O_EXCL;

  if (flags & IOFlags::OpenTruncate)
    openflags |= O_TRUNC;

  void * newfd = NULL;
  if ((newfd = (*redd_open) (name, openflags, perms)) == NULL)
    throw cms::Exception("LStoreFile::open()")
      << "redd_open(name='" << name
      << "', flags=0x" << std::hex << openflags
      << ", permissions=0" << std::oct << perms << std::dec
      << ") => error '" << (*redd_strerror)()
      << "' (redd_errno=" << (*redd_errno)() << ")";

  m_fd = newfd;

  m_close = true;

  edm::LogInfo("LStoreFileInfo") << "Opened " << m_name;
}

void LStoreFile::open ( const std::string &  name, int  flags = IOFlags::OpenRead, int  perms = 0666  )

virtual

Definition at line 163 of file LStoreFile.cc.

References flags, and open().

{ open (name.c_str (), flags, perms); }

IOOffset LStoreFile::position ( IOOffset  offset, Relative  whence = SET  )

virtual

Implements Storage.

Definition at line 303 of file LStoreFile.cc.

References Storage::CURRENT, Storage::END, edm::hlt::Exception, m_fd, m_name, NULL, redd_errno, redd_lseek, query::result, and Storage::SET.

Referenced by LStoreStorageMaker::check().

{
  if (m_fd == NULL)
    throw cms::Exception("LStoreFile::position()")
      << "LStoreFile::position() called on a closed file";
  if (whence != CURRENT && whence != SET && whence != END)
    throw cms::Exception("LStoreFile::position()")
      << "LStoreFile::position() called with incorrect 'whence' parameter";

  IOOffset  result;
  uint32_t      mywhence = (whence == SET ? SEEK_SET
                    : whence == CURRENT ? SEEK_CUR
                : SEEK_END);
  if ((result = (*redd_lseek) (m_fd, (off_t) offset, (uint32_t)mywhence)) == -1)
    throw cms::Exception("LStoreFile::position()")
      << "redd_lseek64(name='" << m_name << "', offset=" << offset
      << ", whence=" << mywhence << ") failed with error '"
      << (*redd_strerror) () << "' (redd_errno=" << (*redd_errno)() << ")";
  return result;
}

IOSize LStoreFile::read ( void *  into, IOSize  n  )

virtual

Read into into at most n number of bytes.

If this is a blocking stream, the call will block until some data can be read, end of input is reached, or an exception is thrown. For a non-blocking stream the available input is returned. If none is available, an exception is thrown.

Returns

The number of bytes actually read. This is less or equal to the size of the buffer. Zero indicates that the end of the input has been reached: end of file, or remote end closing for a connected channel like a pipe or a socket. Otherwise the value can be less than requested if limited amount of input is currently available for platform or implementation reasons.

Exceptions

In	case of error, a #IOError exception is thrown. This includes the situation where the input stream is in non-blocking mode and no input is currently available (FIXME: make this simpler; clarify which exception).

Implements IOInput.

Definition at line 266 of file LStoreFile.cc.

References generateEDF::done, edm::hlt::Exception, m_fd, m_name, redd_errno, redd_strerror, and asciidump::s.

{
  IOSize done = 0;
  while (done < n)
  {
    ssize_t s = (*redd_read) (m_fd, (char *) into + done, n - done);
    if (s == -1)
      throw cms::Exception("LStoreFile::read()")
        << "redd_read(name='" << m_name << "', n=" << (n-done)
        << ") failed with error '" << (*redd_strerror)()
        << "' (redd_errno=" << (*redd_errno)() << ")";
   done += s;
  }
  return done;
}

void LStoreFile::resize ( IOOffset  size )

virtual

Implements Storage.

Definition at line 325 of file LStoreFile.cc.

References edm::hlt::Exception, and m_name.

Referenced by python.Vispa.Gui.TextDialog.TextDialog::__init__(), python.Vispa.Plugins.ConfigEditor.ToolDialog.ToolDialog::__init__(), python.Vispa.Main.MainWindow.MainWindow::_loadIni(), and python.Vispa.Gui.PortConnection.PointToPointConnection::updateConnection().

{
  throw cms::Exception("LStoreFile::resize()")
    << "LStoreFile::resize(name='" << m_name << "') not implemented";
}

IOSize LStoreFile::write ( const void *  from, IOSize  n  )

virtual

Write n bytes of data starting at address from.

Returns

The number of bytes written. Normally this will be n, but can be less, even zero, for example if the stream is non-blocking mode and cannot accept input at this time.

Exceptions

In	case of error, an exception is thrown. However if the stream is in non-blocking mode and cannot accept output, it will not throw an exception – the return value will be less than requested.

Implements IOOutput.

Definition at line 283 of file LStoreFile.cc.

References generateEDF::done, edm::hlt::Exception, m_fd, m_name, redd_errno, redd_strerror, and asciidump::s.

{
  IOSize done = 0;
  while (done < n)
  {
    ssize_t s = (*redd_write) (m_fd, (const char *) from + done, n - done);
    if (s == -1)
      throw cms::Exception("LStoreFile::write()")
        << "redd_write(name='" << m_name << "', n=" << (n-done)
        << ") failed with error '" << (*redd_strerror)()
        << "' (redd_errno=" << (*redd_errno)() << ")";
    done += s;
  }

  return done;
}

Member Data Documentation

bool LStoreFile::m_close

private

Definition at line 54 of file LStoreFile.h.

Referenced by abort(), close(), open(), and ~LStoreFile().

pthread_mutex_t LStoreFile::m_dlopen_lock = PTHREAD_MUTEX_INITIALIZER

static

Definition at line 50 of file LStoreFile.h.

Referenced by closeLibrary(), and loadLibrary().

void* LStoreFile::m_fd

private

Definition at line 53 of file LStoreFile.h.

Referenced by abort(), close(), open(), position(), read(), and write().

bool LStoreFile::m_is_loaded

private

Definition at line 59 of file LStoreFile.h.

Referenced by closeLibrary(), and loadLibrary().

void* LStoreFile::m_library_handle

private

Definition at line 58 of file LStoreFile.h.

Referenced by closeLibrary(), and loadLibrary().

std::string LStoreFile::m_name

private

Definition at line 55 of file LStoreFile.h.

Referenced by close(), open(), position(), read(), resize(), write(), and ~LStoreFile().

int32_t(* LStoreFile::redd_close)(void *)

private

Definition at line 65 of file LStoreFile.h.

Referenced by close().

int32_t(* LStoreFile::redd_errno)()

private

Definition at line 70 of file LStoreFile.h.

Referenced by close(), loadLibrary(), open(), position(), read(), and write().

int32_t(* LStoreFile::redd_init)()

private

Definition at line 63 of file LStoreFile.h.

Referenced by loadLibrary().

int64_t(* LStoreFile::redd_lseek)(void *, int64_t, uint32_t)

private

Definition at line 66 of file LStoreFile.h.

Referenced by loadLibrary(), and position().

void*(* LStoreFile::redd_open)(const char *, int32_t, int32_t)

private

Definition at line 67 of file LStoreFile.h.

Referenced by loadLibrary(), and open().

int64_t(* LStoreFile::redd_read)(void *, char *, int64_t)

private

Definition at line 64 of file LStoreFile.h.

Referenced by loadLibrary().

const std::string&(* LStoreFile::redd_strerror)()

private

Definition at line 71 of file LStoreFile.h.

Referenced by loadLibrary(), read(), and write().

int32_t(* LStoreFile::redd_term)()

private

Definition at line 69 of file LStoreFile.h.

Referenced by closeLibrary(), and loadLibrary().

int64_t(* LStoreFile::redd_write)(void *, const char *, int64_t)

private

Definition at line 68 of file LStoreFile.h.

Referenced by loadLibrary().