merge ordm/receiver branch -r5574:5659. Reworks OFDM receiver with refactored OFDM...

[debian/gnuradio] / gnuradio-core / src / lib / io / gr_file_sink_base.cc

diff --git a/gnuradio-core/src/lib/io/gr_file_sink_base.cc b/gnuradio-core/src/lib/io/gr_file_sink_base.cc
new file mode 100644 (file)
index 0000000..44d01ba
--- /dev/null
+++ b/gnuradio-core/src/lib/io/gr_file_sink_base.cc
@@ -0,0 +1,118 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2006,2007 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 2, 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>
+
+// 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)
+{
+  omni_mutex_lock      l(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()
+{
+  omni_mutex_lock      l(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){
+    omni_mutex_lock    l(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;
+  }
+}