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// Copyright (C) 1999,2000 Bruce Guenter <bruceg@em.ca>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#include "fdbuf.h"
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
///////////////////////////////////////////////////////////////////////////////
// Class fdbuf
///////////////////////////////////////////////////////////////////////////////
fdbuf::fdbuf(int fdesc, bool dc, unsigned bufsz)
: buf(new char[bufsz]),
buflength(0),
bufstart(0),
offset(0),
errnum(0),
flags(0),
bufsize(bufsz),
fd(fdesc),
do_close(dc)
{
if(!buf) {
flags = flag_error;
errnum = errno;
}
if(fdesc < 0)
flags |= flag_closed;
#ifdef _REENTRANT
pthread_mutex_t tmp = PTHREAD_MUTEX_INITIALIZER;
mutex = tmp;
pthread_mutex_init(&mutex, 0);
#else
#ifdef FDBUF_MUTEX_DEBUG
mutex_count = 0;
#endif
#endif
}
fdbuf::~fdbuf()
{
close();
#ifdef _REENTRANT
pthread_mutex_destroy(&mutex);
#endif
delete buf;
}
bool fdbuf::error() const
{
return flags & flag_error;
}
bool fdbuf::closed() const
{
return flags & flag_closed;
}
bool fdbuf::close()
{
if(do_close && fd >= 0 && !(flags & flag_closed)) {
if(::close(fd) == -1) {
errnum = errno;
flags |= flag_error;
return false;
}
flags |= flag_closed;
}
return true;
}
#if defined(FDBUF_MUTEX_DEBUG) && !defined(_REENTRANT)
{
int* null = 0;
(*null)++;
kill(getpid(), 9);
}
// Debugging code
void fdbuf::lock()
{
if(mutex)
abort();
++mutex;
}
void fdbuf::unlock()
{
if(mutex != 1)
abort();
--mutex;
}
#endif
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