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// $Id$
// ============================================================================
//
// = LIBRARY
// tests
//
// = FILENAME
// Mem_Map_Test.cpp
//
// = DESCRIPTION
// This test illustrates the use of ACE_Mem_Map to reverse a
// file. The test first creates a dummy file for testing, then
// reverses the file and then reverses it again to get back the
// original file.
//
// = AUTHOR
// Prashant Jain <pjain@cs.wustl.edu>
//
// ============================================================================
#include "test_config.h"
#include "ace/Mem_Map.h"
#include "ace/ACE.h"
#include "ace/OS_NS_string.h"
#include "ace/OS_NS_unistd.h"
#include "ace/OS_NS_fcntl.h"
#include "ace/OS_Memory.h"
ACE_RCSID(tests, Mem_Map_Test, "Mem_Map_Test.cpp,v 4.36 2003/11/01 11:15:25 dhinton Exp")
#if !defined (ACE_LACKS_MMAP)
static const char ACE_ALPHABET[] = "abcdefghijklmnopqrstuvwxyz";
static const int LINE_LENGTH = 10;
static const int NUM_LINES = 15;
static void
reverse_file (ACE_HANDLE file_handle,
char *array,
size_t size)
{
int count = 0;
// LynxOS 3.0.0/PowerPC needs the volatile qualifier, with -O2
// optimization enabled and without ACE_HAS_INLINE.
volatile size_t i = size;
--i;
if (array[i] == '\0')
array[i] = '\n';
while (i-- > 0)
{
if (array[i] == '\n')
{
ACE_OS::write (file_handle, array + i + 1, count);
ACE_OS::write (file_handle, ACE_TEXT ("\n"), 1);
count = 0;
}
else
count++;
}
ACE_OS::write (file_handle, array, count+1);
}
static int
create_test_file (ACE_TCHAR *filename, int line_length, int num_lines)
{
char *mybuf = 0;
ACE_NEW_RETURN (mybuf, char[line_length + 1], -1);
const char *c = ACE_ALPHABET;
const char *d = c;
#if defined (__QNXNTO__) || (defined (ACE_VXWORKS) && (ACE_VXWORKS <= 0x670))
// For NTO has to applied to open the file, as Mem_Map can map only shared memory
ACE_Mem_Map mmap_4_open;
mmap_4_open.open (filename, O_RDWR | O_CREAT | O_TRUNC, ACE_DEFAULT_FILE_PERMS);
ACE_HANDLE file_handle = mmap_4_open.handle();
#else
ACE_HANDLE file_handle = ACE_OS::open (filename,
O_RDWR | O_CREAT | O_TRUNC,
ACE_DEFAULT_FILE_PERMS);
#endif
if (file_handle == ACE_INVALID_HANDLE)
{
delete [] mybuf;
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("Open failed for %s\n"),
filename),
-1);
}
for (int j = 0; j < num_lines; j++)
{
for (int i = 0; i < line_length; i++)
{
mybuf[i] = *c;
c++;
}
mybuf[line_length] = '\0';
c = ++d;
if (ACE_OS::write (file_handle, mybuf, line_length) != line_length)
{
delete [] mybuf;
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("%p (%d) <%s>\n"),
ACE_TEXT ("Write to file failed:"),
ACE_ERRNO_GET,
filename),
-1);
}
if (ACE_OS::write (file_handle, ACE_TEXT ("\n"), 1) != 1)
{
delete [] mybuf;
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("write to file %s failed\n"),
filename),
-1);
}
}
#if defined (__QNXNTO__) || (defined (ACE_VXWORKS) && (ACE_VXWORKS <= 0x670))
mmap_4_open.close();
#else
ACE_OS::close (file_handle);
#endif
delete [] mybuf;
return 0;
}
#endif /* !ACE_LACKS_MMAP */
int
run_main (int, ACE_TCHAR *[])
{
ACE_START_TEST (ACE_TEXT ("Mem_Map_Test"));
#if !defined (ACE_LACKS_MMAP)
#if defined (__QNXNTO__) || (defined (ACE_VXWORKS) && (ACE_VXWORKS <= 0x670))
ACE_ERROR ((LM_INFO,
ACE_TEXT ("mmap on QNX Neutrino/VxWorks can map only shared memory files\n")));
#endif
// = Initialize the temporary variable names
ACE_TCHAR test_file[MAXPATHLEN + 1];
ACE_TCHAR temp_file1[MAXPATHLEN + 1];
ACE_TCHAR temp_file2[MAXPATHLEN + 1];
// Get the temporary directory
// - 18 is for the filenames, ace_mem_map_temp_1 is the longest
if (ACE::get_temp_dir (test_file, MAXPATHLEN - 18) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("Temporary path too long\n")),
-1);
// Copy the temp directory to the other variables
ACE_OS::strcpy (temp_file1, test_file);
ACE_OS::strcpy (temp_file2, test_file);
// Add the filenames to the end
ACE_OS::strcat (test_file,
ACE_TEXT ("ace_mem_map_test"));
ACE_OS::strcat (temp_file1,
ACE_TEXT ("ace_mem_map_temp_1"));
ACE_OS::strcat (temp_file2,
ACE_TEXT ("ace_mem_map_temp_2"));
// First create a test file to work on
if (create_test_file (test_file, LINE_LENGTH, NUM_LINES) != 0)
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("Create test file failed\n")),
-1);
ACE_Mem_Map mmap;
// First memory map the test file
if (mmap.map (test_file) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("%n: %p %s\n%a"),
ACE_TEXT ("mmap"),
test_file),
-1);
// Now create a temporary file for intermediate processing
#if defined (__QNXNTO__) || (defined (ACE_VXWORKS) && (ACE_VXWORKS <= 0x670))
ACE_Mem_Map mmap_4_open;
mmap_4_open.open(temp_file1,
O_RDWR | O_TRUNC | O_CREAT,
ACE_DEFAULT_FILE_PERMS);
ACE_HANDLE temp_file_handle = mmap_4_open.handle();
#else
ACE_HANDLE temp_file_handle = ACE_OS::open (temp_file1,
O_RDWR | O_TRUNC | O_CREAT,
ACE_DEFAULT_FILE_PERMS);
#endif
if (temp_file_handle == ACE_INVALID_HANDLE)
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("Open failed\n")),
-1);
// Reverse the original file and write the output to the temporary
// file.
reverse_file (temp_file_handle,
(char *) mmap.addr (),
mmap.size ());
#if defined (__QNXNTO__) || (defined (ACE_VXWORKS) && (ACE_VXWORKS <= 0x670))
mmap_4_open.close();
#else
ACE_OS::close (temp_file_handle);
#endif
ACE_Mem_Map temp_mmap;
// Now memory map the temporary file
if (temp_mmap.map (temp_file1) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("%n: %p %s\n%a"),
ACE_TEXT ("mmap"),
temp_file1),
-1);
#if defined (__QNXNTO__) || (defined (ACE_VXWORKS) && (ACE_VXWORKS <= 0x670))
mmap_4_open.open(temp_file2,
O_RDWR | O_TRUNC | O_CREAT,
ACE_DEFAULT_FILE_PERMS);
temp_file_handle = mmap_4_open.handle();
#else
temp_file_handle = ACE_OS::open (temp_file2,
O_RDWR | O_TRUNC | O_CREAT,
ACE_DEFAULT_FILE_PERMS);
#endif
if ( temp_file_handle == ACE_INVALID_HANDLE)
ACE_ERROR_RETURN ((LM_ERROR, ACE_TEXT ("Open failed\n")), -1);
// Now reverse the temporary file and write everything to the second
// temporary file.
reverse_file (temp_file_handle,
(char *) temp_mmap.addr (),
temp_mmap.size ());
#if defined (__QNXNTO__) || (defined (ACE_VXWORKS) && (ACE_VXWORKS <= 0x670))
mmap_4_open.close();
#else
ACE_OS::close (temp_file_handle);
#endif
// Memory map the second temporary file
ACE_Mem_Map temp_mmap2;
if (temp_mmap2.map (temp_file2) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("%n: %p %s\n%a"),
ACE_TEXT ("mmap"),
temp_file2),
-1);
// Now do a memcmp -- the orig file and the second temporary file
// should be identical.
ACE_ASSERT (ACE_OS::memcmp (temp_mmap2.addr (),
mmap.addr (),
mmap.size ()) == 0);
// Delete the test file
mmap.remove ();
// Delete ACE_TEMP_TEST_FILE
temp_mmap.remove ();
// Delete ACE_TEMP_TEST_FILE_2
temp_mmap2.remove ();
#else /* !ACE_LACKS_MMAP */
ACE_ERROR ((LM_INFO,
ACE_TEXT ("mmap is not supported on this platform\n")));
#endif /* !ACE_LACKS_MMAP */
ACE_END_TEST;
return 0;
}
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