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Diffstat (limited to 'gnuradio-runtime/lib/gr_vmcircbuf_mmap_tmpfile.cc')
-rw-r--r--gnuradio-runtime/lib/gr_vmcircbuf_mmap_tmpfile.cc197
1 files changed, 0 insertions, 197 deletions
diff --git a/gnuradio-runtime/lib/gr_vmcircbuf_mmap_tmpfile.cc b/gnuradio-runtime/lib/gr_vmcircbuf_mmap_tmpfile.cc
deleted file mode 100644
index 35de64699e..0000000000
--- a/gnuradio-runtime/lib/gr_vmcircbuf_mmap_tmpfile.cc
+++ /dev/null
@@ -1,197 +0,0 @@
-/* -*- c++ -*- */
-/*
- * Copyright 2003,2011 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_vmcircbuf_mmap_tmpfile.h>
-#include <stdexcept>
-#include <assert.h>
-#include <unistd.h>
-#include <stdlib.h>
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_MMAN_H
-#include <sys/mman.h>
-#endif
-#include <fcntl.h>
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-#include <gr_pagesize.h>
-#include <gr_sys_paths.h>
-
-gr_vmcircbuf_mmap_tmpfile::gr_vmcircbuf_mmap_tmpfile (int size)
- : gr_vmcircbuf (size)
-{
-#if !defined(HAVE_MMAP)
- fprintf (stderr, "gr_vmcircbuf_mmap_tmpfile: mmap or mkstemp is not available\n");
- throw std::runtime_error ("gr_vmcircbuf_mmap_tmpfile");
-#else
-
- if (size <= 0 || (size % gr_pagesize ()) != 0){
- fprintf (stderr, "gr_vmcircbuf_mmap_tmpfile: invalid size = %d\n", size);
- throw std::runtime_error ("gr_vmcircbuf_mmap_tmpfile");
- }
-
- int seg_fd = -1;
- char seg_name[1024];
-
- static int s_seg_counter = 0;
-
-
- // open a temporary file that we'll map in a bit later
-
- while (1){
- snprintf (seg_name, sizeof (seg_name),
- "%s/gnuradio-%d-%d-XXXXXX", gr_tmp_path (), getpid (), s_seg_counter);
- s_seg_counter++;
-
- seg_fd = open (seg_name, O_RDWR | O_CREAT | O_EXCL, 0600);
- if (seg_fd == -1){
- if (errno == EEXIST) // File already exists (shouldn't happen). Try again
- continue;
-
- char msg[1024];
- snprintf (msg, sizeof (msg),
- "gr_vmcircbuf_mmap_tmpfile: open [%s]", seg_name);
- perror (msg);
- throw std::runtime_error ("gr_vmcircbuf_mmap_tmpfile");
- }
- break;
- }
-
- if (unlink (seg_name) == -1){
- perror ("gr_vmcircbuf_mmap_tmpfile: unlink");
- throw std::runtime_error ("gr_vmcircbuf_mmap_tmpfile");
- }
-
- // We've got a valid file descriptor to a tmp file.
- // Now set it's length to 2x what we really want and mmap it in.
-
- if (ftruncate (seg_fd, (off_t) 2 * size) == -1){
- close (seg_fd); // cleanup
- perror ("gr_vmcircbuf_mmap_tmpfile: ftruncate (1)");
- throw std::runtime_error ("gr_vmcircbuf_mmap_tmpfile");
- }
-
- void *first_copy = mmap (0, 2 * size,
- PROT_READ | PROT_WRITE, MAP_SHARED,
- seg_fd, (off_t) 0);
-
- if (first_copy == MAP_FAILED){
- close (seg_fd); // cleanup
- perror ("gr_vmcircbuf_mmap_tmpfile: mmap (1)");
- throw std::runtime_error ("gr_vmcircbuf_mmap_tmpfile");
- }
-
- // unmap the 2nd half
- if (munmap ((char *) first_copy + size, size) == -1){
- close (seg_fd); // cleanup
- perror ("gr_vmcircbuf_mmap_tmpfile: munmap (1)");
- throw std::runtime_error ("gr_vmcircbuf_mmap_tmpfile");
- }
-
- // map the first half into the now available hole where the
- // second half used to be.
-
- void *second_copy = mmap ((char *) first_copy + size, size,
- PROT_READ | PROT_WRITE, MAP_SHARED,
- seg_fd, (off_t) 0);
-
- if (second_copy == MAP_FAILED){
- munmap(first_copy, size); // cleanup
- close (seg_fd);
- perror ("gr_vmcircbuf_mmap_tmpfile: mmap (2)");
- throw std::runtime_error ("gr_vmcircbuf_mmap_tmpfile");
- }
-
- // check for contiguity
- if ((char *) second_copy != (char *) first_copy + size){
- munmap(first_copy, size); // cleanup
- munmap(second_copy, size);
- close (seg_fd);
- perror ("gr_vmcircbuf_mmap_tmpfile: non-contiguous second copy");
- throw std::runtime_error ("gr_vmcircbuf_mmap_tmpfile");
- }
-
- // cut the tmp file down to size
- if (ftruncate (seg_fd, (off_t) size) == -1){
- munmap(first_copy, size); // cleanup
- munmap(second_copy, size);
- close (seg_fd);
- perror ("gr_vmcircbuf_mmap_tmpfile: ftruncate (2)");
- throw std::runtime_error ("gr_vmcircbuf_mmap_tmpfile");
- }
-
- close (seg_fd); // fd no longer needed. The mapping is retained.
-
- // Now remember the important stuff
-
- d_base = (char *) first_copy;
- d_size = size;
-#endif
-}
-
-gr_vmcircbuf_mmap_tmpfile::~gr_vmcircbuf_mmap_tmpfile ()
-{
-#if defined(HAVE_MMAP)
- if (munmap (d_base, 2 * d_size) == -1){
- perror ("gr_vmcircbuf_mmap_tmpfile: munmap (2)");
- }
-#endif
-}
-
-// ----------------------------------------------------------------
-// The factory interface
-// ----------------------------------------------------------------
-
-
-gr_vmcircbuf_factory *gr_vmcircbuf_mmap_tmpfile_factory::s_the_factory = 0;
-
-gr_vmcircbuf_factory *
-gr_vmcircbuf_mmap_tmpfile_factory::singleton ()
-{
- if (s_the_factory)
- return s_the_factory;
-
- s_the_factory = new gr_vmcircbuf_mmap_tmpfile_factory ();
- return s_the_factory;
-}
-
-int
-gr_vmcircbuf_mmap_tmpfile_factory::granularity ()
-{
- return gr_pagesize ();
-}
-
-gr_vmcircbuf *
-gr_vmcircbuf_mmap_tmpfile_factory::make (int size)
-{
- try {
- return new gr_vmcircbuf_mmap_tmpfile (size);
- }
- catch (...){
- return 0;
- }
-}