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Patch #1407135, bug #1424041, make mmap.mmap(-1, length) work the same

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on both Unix (SVR4 and BSD) and Windows.  Restores behaviour of passing -1
for anonymous memory on Unix.  Use MAP_ANONYMOUS instead of _ANON since
the latter is deprecated according to Linux (gentoo) man pages.

Should we continue to allow mmap.mmap(0, length) to work on Windows?
0 is a valid fd.

Will backport bugfix portions.
This commit is contained in:
Neal Norwitz 2006-02-05 05:45:43 +00:00
parent d1cfc8ade1
commit 0e6bc8c260
5 changed files with 68 additions and 13 deletions
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14
Lib/test/test_mmap.py
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@ -283,7 +283,7 @@ def test_both():
print ' Try opening a bad file descriptor...'
try:
mmap.mmap(-1, 4096)
mmap.mmap(-2, 4096)
except mmap.error:
pass
else:
@ -380,6 +380,16 @@ def test_both():
finally:
os.unlink(TESTFN)
print ' Test passed'
def test_anon():
print " anonymous mmap.mmap(-1, PAGESIZE)..."
m = mmap.mmap(-1, PAGESIZE)
for x in xrange(PAGESIZE):
verify(m[x] == '\0', "anonymously mmap'ed contents should be zero")
for x in xrange(PAGESIZE):
m[x] = ch = chr(x & 255)
vereq(m[x], ch)
test_both()
test_anon()
print ' Test passed'