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Merged revisions 88486 via svnmerge from

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  r88486 | antoine.pitrou | 2011-02-22 00:41:12 +0100 (mar., 22 févr. 2011) | 5 lines

  Issue #4681: Allow mmap() to work on file sizes and offsets larger than
  4GB, even on 32-bit builds.  Initial patch by Ross Lagerwall, adapted for
  32-bit Windows.
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This commit is contained in:
Antoine Pitrou 2011-02-21 23:46:27 +00:00
parent a47c25d74f
commit 97696cbf36
3 changed files with 112 additions and 50 deletions
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51
Lib/test/test_mmap.py
View file

@ -1,4 +1,4 @@
from test.support import TESTFN, run_unittest, import_module
from test.support import TESTFN, run_unittest, import_module, unlink, requires
import unittest
import os
import re
@ -646,9 +646,56 @@ class MmapTests(unittest.TestCase):
"wrong exception raised in context manager")
self.assertTrue(m.closed, "context manager failed")
class LargeMmapTests(unittest.TestCase):
def setUp(self):
unlink(TESTFN)
def tearDown(self):
unlink(TESTFN)
def _working_largefile(self):
# Only run if the current filesystem supports large files.
f = open(TESTFN, 'wb', buffering=0)
try:
f.seek(0x80000001)
f.write(b'x')
f.flush()
except (IOError, OverflowError):
raise unittest.SkipTest("filesystem does not have largefile support")
finally:
f.close()
unlink(TESTFN)
def test_large_offset(self):
if sys.platform[:3] == 'win' or sys.platform == 'darwin':
requires('largefile',
'test requires %s bytes and a long time to run' % str(0x180000000))
self._working_largefile()
with open(TESTFN, 'wb') as f:
f.seek(0x14FFFFFFF)
f.write(b" ")
with open(TESTFN, 'rb') as f:
with mmap.mmap(f.fileno(), 0, offset=0x140000000, access=mmap.ACCESS_READ) as m:
self.assertEqual(m[0xFFFFFFF], 32)
def test_large_filesize(self):
if sys.platform[:3] == 'win' or sys.platform == 'darwin':
requires('largefile',
'test requires %s bytes and a long time to run' % str(0x180000000))
self._working_largefile()
with open(TESTFN, 'wb') as f:
f.seek(0x17FFFFFFF)
f.write(b" ")
with open(TESTFN, 'rb') as f:
with mmap.mmap(f.fileno(), 0x10000, access=mmap.ACCESS_READ) as m:
self.assertEqual(m.size(), 0x180000000)
def test_main():
run_unittest(MmapTests)
run_unittest(MmapTests, LargeMmapTests)
if __name__ == '__main__':
test_main()