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/* -*- c++ -*- */
/*
* Copyright 2004,2006,2007,2009 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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 3, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gr_file_sink_base.h>
#include <cstdio>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdexcept>
#include <stdio.h>
#include <gruel/thread.h>
// win32 (mingw/msvc) specific
#ifdef HAVE_IO_H
#include <io.h>
#endif
#ifdef O_BINARY
#define OUR_O_BINARY O_BINARY
#else
#define OUR_O_BINARY 0
#endif
// should be handled via configure
#ifdef O_LARGEFILE
#define OUR_O_LARGEFILE O_LARGEFILE
#else
#define OUR_O_LARGEFILE 0
#endif
gr_file_sink_base::gr_file_sink_base(const char *filename, bool is_binary)
: d_fp(0), d_new_fp(0), d_updated(false), d_is_binary(is_binary)
{
if (!open(filename))
throw std::runtime_error ("can't open file");
}
gr_file_sink_base::~gr_file_sink_base ()
{
close();
if (d_fp){
fclose(d_fp);
d_fp = 0;
}
}
bool
gr_file_sink_base::open(const char *filename)
{
gruel::scoped_lock guard(d_mutex); // hold mutex for duration of this function
// we use the open system call to get access to the O_LARGEFILE flag.
int fd;
if ((fd = ::open (filename,
O_WRONLY|O_CREAT|O_TRUNC|OUR_O_LARGEFILE|OUR_O_BINARY,
0664)) < 0){
perror (filename);
return false;
}
if (d_new_fp){ // if we've already got a new one open, close it
fclose(d_new_fp);
d_new_fp = 0;
}
if ((d_new_fp = fdopen (fd, d_is_binary ? "wb" : "w")) == NULL){
perror (filename);
::close(fd); // don't leak file descriptor if fdopen fails.
}
d_updated = true;
return d_new_fp != 0;
}
void
gr_file_sink_base::close()
{
gruel::scoped_lock guard(d_mutex); // hold mutex for duration of this function
if (d_new_fp){
fclose(d_new_fp);
d_new_fp = 0;
}
d_updated = true;
}
void
gr_file_sink_base::do_update()
{
if (d_updated){
gruel::scoped_lock guard(d_mutex); // hold mutex for duration of this block
if (d_fp)
fclose(d_fp);
d_fp = d_new_fp; // install new file pointer
d_new_fp = 0;
d_updated = false;
}
}
void
gr_file_sink_base::set_unbuffered(bool unbuffered)
{
d_unbuffered = unbuffered;
}
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