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// --------------------------------------------------------------------------
//
// File
// Name: EventWatchFilesystemObject.cpp
// Purpose: WaitForEvent compatible object for watching directories
// Created: 12/3/04
//
// --------------------------------------------------------------------------
#include "Box.h"
#include <fcntl.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "EventWatchFilesystemObject.h"
#include "autogen_CommonException.h"
#include "Logging.h"
#include "MemLeakFindOn.h"
// --------------------------------------------------------------------------
//
// Function
// Name: EventWatchFilesystemObject::EventWatchFilesystemObject(const char *)
// Purpose: Constructor -- opens the file object
// Created: 12/3/04
//
// --------------------------------------------------------------------------
EventWatchFilesystemObject::EventWatchFilesystemObject(const char *Filename)
#ifdef HAVE_KQUEUE
: mDescriptor(::open(Filename, O_RDONLY /*O_EVTONLY*/, 0))
#endif
{
#ifdef HAVE_KQUEUE
if(mDescriptor == -1)
{
BOX_ERROR("EventWatchFilesystemObject: "
"Failed to open file '" << Filename << "': " <<
strerror(errno));
THROW_EXCEPTION(CommonException, OSFileOpenError)
}
#else
THROW_EXCEPTION(CommonException, KQueueNotSupportedOnThisPlatform)
#endif
}
// --------------------------------------------------------------------------
//
// Function
// Name: EventWatchFilesystemObject::~EventWatchFilesystemObject()
// Purpose: Destructor
// Created: 12/3/04
//
// --------------------------------------------------------------------------
EventWatchFilesystemObject::~EventWatchFilesystemObject()
{
if(mDescriptor != -1)
{
::close(mDescriptor);
}
}
// --------------------------------------------------------------------------
//
// Function
// Name: EventWatchFilesystemObject::EventWatchFilesystemObject(const EventWatchFilesystemObject &)
// Purpose: Copy constructor
// Created: 12/3/04
//
// --------------------------------------------------------------------------
EventWatchFilesystemObject::EventWatchFilesystemObject(const EventWatchFilesystemObject &rToCopy)
: mDescriptor(::dup(rToCopy.mDescriptor))
{
if(mDescriptor == -1)
{
THROW_EXCEPTION(CommonException, OSFileError)
}
}
#ifdef HAVE_KQUEUE
// --------------------------------------------------------------------------
//
// Function
// Name: EventWatchFilesystemObject::FillInKEvent(struct kevent &, int)
// Purpose: For WaitForEvent
// Created: 12/3/04
//
// --------------------------------------------------------------------------
void EventWatchFilesystemObject::FillInKEvent(struct kevent &rEvent, int Flags) const
{
EV_SET(&rEvent, mDescriptor, EVFILT_VNODE, EV_CLEAR, NOTE_DELETE | NOTE_WRITE, 0, (void*)this);
}
#else
void EventWatchFilesystemObject::FillInPoll(int &fd, short &events, int Flags) const
{
THROW_EXCEPTION(CommonException, KQueueNotSupportedOnThisPlatform)
}
#endif
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