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//=============================================================================
/**
* @file Storable_File_Guard.cpp
*
* $Id$
*
* @author Rich Seibel (seibelr@ociweb.com)
* @author Byron Harris (harrisb@ociweb.com)
*/
//=============================================================================
#include "tao/Storable_File_Guard.h"
#include "tao/Storable_Base.h"
#include "tao/SystemException.h"
TAO::Storable_File_Guard::
Storable_File_Guard (bool redundant)
: redundant_(redundant)
, closed_(1)
{
ACE_TRACE("TAO::Storable_File_Guard::Storable_File_Guard");
}
void
TAO::Storable_File_Guard::init(const char * mode)
{
ACE_TRACE("TAO::Storable_File_Guard::init");
// We only accept a subset of mode argument, check it
rwflags_ = 0;
for( unsigned int i = 0; i<ACE_OS::strlen(mode); i++ )
{
switch (mode[i])
{
case 'r': rwflags_ |= mode_read;
break;
case 'w': rwflags_ |= mode_write;
break;
case 'c': rwflags_ |= mode_create;
break;
default: rwflags_ = -1;
}
}
if( rwflags_ <= 0 )
{
errno = EINVAL;
throw CORBA::PERSIST_STORE();
}
// Create the stream
fl_ = this->create_stream(mode);
if (redundant_)
{
if (fl_->open() != 0)
{
delete fl_;
throw CORBA::PERSIST_STORE();
}
// acquire a lock on it
if (fl_ -> flock(0, 0, 0) != 0)
{
fl_->close();
delete fl_;
throw CORBA::INTERNAL();
}
// now that the file is successfully opened and locked it must be
// unlocked/closed before we leave this class
closed_ = 0;
if ( ! (rwflags_ & mode_create) )
{
// Check if our copy is up to date
time_t new_last_changed = fl_->last_changed();
if ( new_last_changed > this->get_parent_last_changed ())
{
this->set_parent_last_changed (new_last_changed);
this->create_child ();
}
}
}
else if ( ! this->is_child_created () || (rwflags_ & mode_write) )
{
if (fl_->open() != 0)
{
delete fl_;
throw CORBA::PERSIST_STORE();
}
// now that the file is successfully opened
// unlocked/closed before we leave this class
closed_ = 0;
if(! this->is_child_created ())
{
this->create_child ();
}
}
else
{
// Need to insure that fl_ gets deleted
delete fl_;
}
}
void
TAO::Storable_File_Guard::release (void)
{
ACE_TRACE("TAO::Storable_File_Guard::release");
if ( ! closed_ )
{
// If we updated the disk, save the time stamp
if(redundant_)
{
if( rwflags_ & mode_write )
this->set_parent_last_changed (fl_->last_changed());
fl_->funlock(0, 0, 0);
}
fl_->close();
delete fl_;
closed_ = 1;
}
}
TAO::Storable_File_Guard::
~Storable_File_Guard ()
{
ACE_TRACE("TAO::Storable_File_Guard::~Storable_File_Guard");
}
TAO::Storable_Base &
TAO::Storable_File_Guard::peer ()
{
ACE_TRACE("TAO::Storable_File_Guard::peer");
return *fl_;
}
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