[svn-r11060] Purpose: Fix bug (reported by user)

Description:
    The use of FileCreatPropList::DEFAULT sometimes caused failure
    in the reference counting area.  This occurs to all the default
    property lists, which also include FileAccPropList::DEFAULT,
    DSetCreatPropList::DEFAULT, and DSetMemXferPropList::DEFAULT.
    H5P_DEFAULT was used to create these default prop lists and
    because its value is 0, the id of these prop lists are 0, which
    is rejected by the H5I functions during the reference counting.

Solution:
    The main action to fix the above problem was to use
        H5P_FILE_CREATE
        H5P_FILE_ACCESS
        H5P_DATASET_CREATE
        H5P_DATASET_XFER
    to define the default property lists accordingly.  Yet, when this
    fix was applied, some bug in reference counting was revealed.
    It appeared that some ids were not incremented but were passed in
    for decrementing.  The following actions were then taken to fix and
    improve the current use of reference counting H5I functions.

        * added private func IdComponent::p_valid_id to verify that the
          id is a valid id and can be passed into an H5I function
        * used p_valid_id to validate an id before calling an H5I functions
          in the reference-counting member functions incRefCount,
          decRefCount, and getCounter
        * changed to use member function incRefCount, decRefCount, and
          getCounter instead of the C APIs H5Iinc_ref, H5Idec_ref, and
          H5Iget_ref throughout IdComponent.

    In addition, overloadings were added for incRefCount, decRefCount,
    and getCounter to take an id different than the id of the current
    instance; they can be convenient during debugging.

Platforms tested:
    Linux 2.4 (heping)
    SunOS 5.8 64-bit (sol)
    AIX 5.1 (copper)

1 files changed, 6 insertions, 6 deletions

diff --git a/c++/src/H5DataType.cpp b/c++/src/H5DataType.cpp
index 6e5d584..1d2a519 100644
--- a/c++/src/H5DataType.cpp
+++ b/c++/src/H5DataType.cpp
@@ -96,7 +96,7 @@ DataType::DataType(const DataType& original) : H5Object(original)
 // Programmer	Binh-Minh Ribler - 2000
 // Modification
 //		Replaced resetIdComponent with decRefCount to use C library
-//		ID reference counting mechanism - BMR, Feb 20, 2005
+//		ID reference counting mechanism - June 1, 2004
 //--------------------------------------------------------------------------
 void DataType::copy( const DataType& like_type )
 {
@@ -538,7 +538,7 @@ bool DataType::isVariableStr() const
 ///\param	dataspace - IN: Dataspace with selection
 ///\param	ref_type - IN: Type of reference; default to \c H5R_DATASET_REGION
 ///\return	A reference
-///\exception	H5::ReferenceIException
+///\exception	H5::IdComponentException
 // Programmer	Binh-Minh Ribler - May, 2004
 //--------------------------------------------------------------------------
 void* DataType::Reference(const char* name, DataSpace& dataspace, H5R_type_t ref_type) const
@@ -553,7 +553,7 @@ void* DataType::Reference(const char* name, DataSpace& dataspace, H5R_type_t ref
 ///		a reference to an HDF5 object, not to a dataset region.
 ///\param	name - IN: Name of the object to be referenced
 ///\return	A reference
-///\exception	H5::ReferenceIException
+///\exception	H5::IdComponentException
 ///\par Description
 //		This function passes H5R_OBJECT and -1 to the protected 
 //		function for it to pass to the C API H5Rcreate
@@ -575,7 +575,7 @@ void* DataType::Reference(const char* name) const
 ///			\li \c H5G_GROUP Object is a group.  
 ///			\li \c H5G_DATASET   Object is a dataset.  
 ///			\li \c H5G_TYPE Object is a named datatype 
-///\exception	H5::ReferenceIException
+///\exception	H5::IdComponentException
 // Programmer	Binh-Minh Ribler - May, 2004
 //--------------------------------------------------------------------------
 H5G_obj_t DataType::getObjType(void *ref, H5R_type_t ref_type) const
@@ -589,7 +589,7 @@ H5G_obj_t DataType::getObjType(void *ref, H5R_type_t ref_type) const
 ///\param	ref      - IN: Reference to get region of
 ///\param	ref_type - IN: Type of reference to get region of - default
 ///\return	DataSpace instance
-///\exception	H5::ReferenceIException
+///\exception	H5::IdComponentException
 // Programmer	Binh-Minh Ribler - May, 2004
 //--------------------------------------------------------------------------
 DataSpace DataType::getRegion(void *ref, H5R_type_t ref_type) const
@@ -628,7 +628,7 @@ void DataType::close()
 // Programmer	Binh-Minh Ribler - 2000
 // Modification
 //		Replaced resetIdComponent with decRefCount to use C library
-//		ID reference counting mechanism - BMR, Feb 20, 2005
+//		ID reference counting mechanism - June 1, 2004
 //--------------------------------------------------------------------------
 DataType::~DataType()
 {