IoSvc Class Reference

#include <IoSvc.h>

Inheritance diagram for IoSvc:

Collaboration diagram for IoSvc:

Classes
struct	FdInfos

Public Types
typedef IIoSvc::Fd	Fd

Public Member Functions
	IoSvc (const std::string &name, ISvcLocator *pSvcLocator)
	Constructor with parameters: More...
virtual	~IoSvc ()
	Destructor: More...
virtual StatusCode	initialize () override
	Gaudi Service Implementation. More...
virtual StatusCode	finalize () override
virtual bool	has_fd (Fd fd) const override
	test if a given file descriptor fd is known to us More...
virtual Fd	fd (const std::string &fname) const override
	retrieve the file descriptor associated with file fname More...
virtual const std::string &	fname (Fd fd) const override
	retrieve the file fname associated with file descriptor fd More...
virtual IoType	mode (Fd fd) const override
	retrieve the open mode associated with file descriptor fd More...
virtual Fd	open (const std::string &fname, IoType mode) override
	open file fname with open mode mode More...
virtual StatusCode	close (Fd fd) override
	close file fd More...

Private Types
typedef std::unordered_map< Fd, FdInfos >	FdMap_t

Private Member Functions
	IoSvc ()
	Default constructor: More...

Private Attributes
FdMap_t	m_fds
	map of fd->fdinfos More...
Fd	m_last_fd
	last created Fd More...

Friends
class	SvcFactory< IoSvc >

Detailed Description

Definition at line 30 of file IoSvc.h.

Member Typedef Documentation

Fd

typedef IIoSvc::Fd IoSvc::Fd

Definition at line 39 of file IoSvc.h.

FdMap_t

typedef std::unordered_map<Fd, FdInfos> IoSvc::FdMap_t

private

Definition at line 98 of file IoSvc.h.

Constructor & Destructor Documentation

IoSvc() [1/2]

IoSvc::IoSvc	(	const std::string &	name,
		ISvcLocator *	pSvcLocator
	)

Constructor with parameters:

Definition at line 31 of file IoSvc.cxx.

                                         : 
  base_class( name, pSvcLocator ),
  m_fds(),
  m_last_fd(3) // 1==cout, 2==cerr, 3==clog
{
  //
  // Property declaration
  // 
  //declareProperty( "Property", m_nProperty );
 
}

~IoSvc()

IoSvc::~IoSvc ( )

virtual

Destructor:

Definition at line 46 of file IoSvc.cxx.

{}

IoSvc() [2/2]

IoSvc::IoSvc ( )

private

Default constructor:

Member Function Documentation

close()

StatusCode IoSvc::close ( Fd  fd )

overridevirtual

close file fd

Definition at line 147 of file IoSvc.cxx.

{
  FdMap_t::const_iterator itr = m_fds.find(fd);
  if (itr != m_fds.end()) {
    m_fds.erase(itr);
    return StatusCode::SUCCESS;
  }
  return StatusCode::FAILURE;
}

fd()

Fd IoSvc::fd ( const std::string &  fname ) const

overridevirtual

retrieve the file descriptor associated with file fname

Returns

-1 if no such fname is known

Definition at line 79 of file IoSvc.cxx.

{
  for (FdMap_t::const_iterator 
         itr = m_fds.begin(),
         iend= m_fds.end();
       itr != iend;
       ++itr) {
    if (itr->second.fname == fname) {
      return itr->first;
    }
  }
  return -1;
}

finalize()

StatusCode IoSvc::finalize ( )

overridevirtual

Definition at line 58 of file IoSvc.cxx.

{
  ATH_MSG_INFO ("Finalizing " << name() << "...");
 
  return StatusCode::SUCCESS;
}

fname()

const std::string & IoSvc::fname ( Fd  fd ) const

overridevirtual

retrieve the file fname associated with file descriptor fd

Returns

empty string if no such fd is known

Definition at line 96 of file IoSvc.cxx.

{
  FdMap_t::const_iterator itr = m_fds.find(fd);
  if (itr != m_fds.end()) {
    return itr->second.fname;
  }
  static const std::string s_empty = "";
  return s_empty;
}

has_fd()

bool IoSvc::has_fd ( Fd  fd ) const

overridevirtual

test if a given file descriptor fd is known to us

Definition at line 71 of file IoSvc.cxx.

{
  return m_fds.find(fd) != m_fds.end();
}

initialize()

StatusCode IoSvc::initialize ( )

overridevirtual

Gaudi Service Implementation.

Definition at line 51 of file IoSvc.cxx.

{
  ATH_MSG_INFO ("Initializing " << name() << "...");
 
  return StatusCode::SUCCESS;
}

mode()

IoType IoSvc::mode ( Fd  fd ) const

overridevirtual

retrieve the open mode associated with file descriptor fd

Definition at line 108 of file IoSvc.cxx.

{
  FdMap_t::const_iterator itr = m_fds.find(fd);
  if (itr != m_fds.end()) {
    return itr->second.mode;
  }
  return IIoSvc::INVALID;
}

open()

Fd IoSvc::open ( const std::string &  fname, IoType  mode  )

overridevirtual

open file fname with open mode mode

Returns

-1 if not successful

Definition at line 120 of file IoSvc.cxx.

{
  // check this `fname` hasn't been already associated.
  Fd fd = this->fd(fname);
  if (fd == -1) {
    // FIXME: use a recycle bin of fds ?
    if ( m_last_fd == (std::numeric_limits<Fd>::max()-1)) {
      ATH_MSG_ERROR("too many file descriptors opened!");
      return -1;
    }
    fd = ++m_last_fd;
    FdInfos infos = {fname, mode};
    m_fds.insert(std::make_pair(fd, infos));
    return fd;
  }
 
  // check the previous open mode is the same
  if (mode == this->mode(fd)) {
    return fd;
  }
 
  // inconsistency...
  return -1;
}

Friends And Related Function Documentation

SvcFactory< IoSvc >

friend class SvcFactory< IoSvc >

friend

Definition at line 1 of file IoSvc.h.

Member Data Documentation

m_fds

FdMap_t IoSvc::m_fds

private

map of fd->fdinfos

Definition at line 101 of file IoSvc.h.

m_last_fd

Fd IoSvc::m_last_fd

private

last created Fd

Definition at line 104 of file IoSvc.h.

---

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

• IoSvc.h
• IoSvc.cxx