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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#ifdef H5_VMS
#include <iostream>
#endif /*H5_VMS*/
#include <string>
#include "H5Include.h"
#include "H5Exception.h"
#include "H5Library.h"
#include "H5IdComponent.h"
#include "H5DataSpace.h"
#ifndef H5_NO_NAMESPACE
namespace H5 {
#endif
//--------------------------------------------------------------------------
// Function: IdComponent overloaded constructor
///\brief Creates an IdComponent object using the id of an existing object.
///\param h5_id - IN: Id of an existing object
///\exception H5::DataTypeIException
// Programmer Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
IdComponent::IdComponent(const hid_t h5_id) {}
//--------------------------------------------------------------------------
// Function: IdComponent copy constructor
///\brief Copy constructor: makes a copy of the original IdComponent object.
///\param original - IN: IdComponent instance to copy
// Programmer Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
IdComponent::IdComponent( const IdComponent& original ) {}
//--------------------------------------------------------------------------
// Function: IdComponent::incRefCount
///\brief Increment reference counter for a given id.
// Programmer Binh-Minh Ribler - May 2005
//--------------------------------------------------------------------------
void IdComponent::incRefCount(const hid_t obj_id) const
{
if (p_valid_id(obj_id))
if (H5Iinc_ref(obj_id) < 0)
throw IdComponentException(inMemFunc("incRefCount"), "incrementing object ref count failed");
}
//--------------------------------------------------------------------------
// Function: IdComponent::incRefCount
///\brief Increment reference counter for the id of this object.
// Programmer Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void IdComponent::incRefCount() const
{
incRefCount(getId());
}
//--------------------------------------------------------------------------
// Function: IdComponent::decRefCount
///\brief Decrement reference counter for a given id.
// Programmer Binh-Minh Ribler - May 2005
// Modification:
// Added the check for ref counter to give a little more info
// on why H5Idec_ref fails in some cases - BMR 5/19/2005
//--------------------------------------------------------------------------
void IdComponent::decRefCount(const hid_t obj_id) const
{
if (p_valid_id(obj_id))
if (H5Idec_ref(obj_id) < 0)
if (H5Iget_ref(obj_id) <= 0)
throw IdComponentException(inMemFunc("decRefCount"),
"object ref count is 0 or negative");
else
throw IdComponentException(inMemFunc("decRefCount"),
"decrementing object ref count failed");
}
//--------------------------------------------------------------------------
// Function: IdComponent::decRefCount
///\brief Decrement reference counter for the id of this object.
// Programmer Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void IdComponent::decRefCount() const
{
decRefCount(getId());
}
//--------------------------------------------------------------------------
// Function: IdComponent::getCounter
///\brief Returns the reference counter for a given id.
///\return Reference count
// Programmer Binh-Minh Ribler - May 2005
//--------------------------------------------------------------------------
int IdComponent::getCounter(const hid_t obj_id) const
{
int counter = 0;
if (p_valid_id(obj_id))
{
counter = H5Iget_ref(obj_id);
if (counter < 0)
throw IdComponentException(inMemFunc("incRefCount"), "getting object ref count failed - negative");
}
return (counter);
}
//--------------------------------------------------------------------------
// Function: IdComponent::getCounter
///\brief Returns the reference counter for the id of this object.
///\return Reference count
// Programmer Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
int IdComponent::getCounter() const
{
return (getCounter(getId()));
}
//--------------------------------------------------------------------------
// Function: hdfObjectType
///\brief Given an id, returns the type of the object.
///\return a valid HDF object type, which may be one of the following:
/// \li \c H5I_FILE
/// \li \c H5I_GROUP
/// \li \c H5I_DATATYPE
/// \li \c H5I_DATASPACE
/// \li \c H5I_DATASET
/// \li \c H5I_ATTR
/// \li or \c H5I_BADID, if no valid type can be determined or the
/// input object id is invalid.
// Programmer Binh-Minh Ribler - Jul, 2005
//--------------------------------------------------------------------------
H5I_type_t IdComponent::getHDFObjType(const hid_t obj_id)
{
H5I_type_t id_type = H5Iget_type(obj_id);
if (id_type <= H5I_BADID || id_type >= H5I_NTYPES)
return H5I_BADID; // invalid
else
return id_type; // valid type
}
//--------------------------------------------------------------------------
// Function: IdComponent::operator=
///\brief Assignment operator.
///\param rhs - IN: Reference to the existing object
///\return Reference to IdComponent instance
///\exception H5::IdComponentException when attempt to close the HDF5
/// object fails
// Description
// First, close the current valid id of this object. Then
// copy the id from rhs to this object, and increment the
// reference counter of the id to indicate that another object
// is referencing that id.
// Modification
// 2010/5/9 - BMR
// Removed close() and incRefCount() because setId/p_setId takes
// care of close() and setId takes care incRefCount().
// Programmer Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
IdComponent& IdComponent::operator=( const IdComponent& rhs )
{
if (this != &rhs)
{
// handling references to this id
try {
setId(rhs.getId());
// Note: a = b, so there are two objects with the same hdf5 id
// that's why incRefCount is needed, and it is called by setId
}
catch (Exception close_error) {
throw FileIException(inMemFunc("operator="), close_error.getDetailMsg());
}
}
return *this;
}
//--------------------------------------------------------------------------
// Function: IdComponent::setId
///\brief Sets the identifier of this object to a new value.
///
///\exception H5::IdComponentException when the attempt to close the HDF5
/// object fails
// Description:
// p_setId ensures that the current valid id of this object is
// properly closed before resetting the object's id to the new id.
// Programmer Binh-Minh Ribler - 2000
// Modification
// 2008/7/23 - BMR
// Changed all subclasses' setId to p_setId and put back setId
// here. p_setId is used in the library where the id provided
// by a C API passed on to user's application in the form of a
// C++ API object, which will be destroyed properly, and so
// p_setId does not call incRefCount. On the other hand, the
// public version setId is used by other applications, in which
// the id passed to setId already has a reference count, so setId
// must call incRefCount.
//--------------------------------------------------------------------------
void IdComponent::setId(const hid_t new_id)
{
// set to new_id
p_setId(new_id);
// increment the reference counter of the new id
incRefCount();
}
//--------------------------------------------------------------------------
// Function: IdComponent destructor
///\brief Noop destructor.
// Programmer Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
IdComponent::~IdComponent() {}
//
// Implementation of protected functions for HDF5 Reference Interface
// and miscelaneous helpers.
//
#ifndef DOXYGEN_SHOULD_SKIP_THIS
//--------------------------------------------------------------------------
// Function: IdComponent::inMemFunc
///\brief Makes and returns string "<class-name>::<func_name>"
///\param func_name - Name of the function where failure occurs
// Description
/// Concatenates the class name of this object with the
/// passed-in function name to create a string that indicates
/// where the failure occurs. The class-name is provided by
/// fromClass(). This string will be used by a base class when
/// an exception is thrown.
// Programmer Binh-Minh Ribler - Aug 6, 2005
//--------------------------------------------------------------------------
H5std_string IdComponent::inMemFunc(const char* func_name) const
{
#ifdef H5_VMS
H5std_string full_name = fromClass();
full_name.append("::");
full_name.append(func_name);
#else
H5std_string full_name = func_name;
full_name.insert(0, "::");
full_name.insert(0, fromClass());
#endif /*H5_VMS*/
return (full_name);
}
//--------------------------------------------------------------------------
// Function: IdComponent default constructor - private
///\brief Default constructor.
// Programmer Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
IdComponent::IdComponent() {}
//--------------------------------------------------------------------------
// Function: IdComponent::p_get_file_name (protected)
// Purpose: Gets the name of the file, in which this object belongs.
// Exception: H5::IdComponentException
// Description:
// This function is protected so that the user applications can
// only have access to its code via allowable classes, namely,
// H5File and H5Object subclasses.
// Programmer Binh-Minh Ribler - Jul, 2004
//--------------------------------------------------------------------------
H5std_string IdComponent::p_get_file_name() const
{
hid_t temp_id = getId();
// Preliminary call to H5Fget_name to get the length of the file name
ssize_t name_size = H5Fget_name(temp_id, NULL, 0);
// If H5Aget_name returns a negative value, raise an exception,
if( name_size < 0 )
{
throw IdComponentException("", "H5Fget_name failed");
}
// Call H5Fget_name again to get the actual file name
char* name_C = new char[name_size+1]; // temporary C-string for C API
name_size = H5Fget_name(temp_id, name_C, name_size+1);
// Check for failure again
if( name_size < 0 )
{
throw IdComponentException("", "H5Fget_name failed");
}
// Convert the C file name and return
H5std_string file_name(name_C);
delete []name_C;
return(file_name);
}
//
// Local functions used in this class
//
//--------------------------------------------------------------------------
// Function: p_valid_id
// Purpose: Verifies that the given id is a valid id so it can be passed
// into an H5I C function.
// Return true if id is valid, false, otherwise
// Programmer Binh-Minh Ribler - May, 2005
//--------------------------------------------------------------------------
bool IdComponent::p_valid_id(const hid_t obj_id)
{
H5I_type_t id_type = H5Iget_type(obj_id);
if (id_type <= H5I_BADID || id_type >= H5I_NTYPES)
return false;
else
return true;
}
#endif // DOXYGEN_SHOULD_SKIP_THIS
#ifndef H5_NO_NAMESPACE
}
#endif
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