qsize() raises NotImplementedError on OS X, don't use it.

Original patch by Nicolas Estibals.  My tweaks to the patch were mostly
style/cosmetic, and adding more tests.

freed by the garbage collector while the Heap lock is held.

freed by the garbage collector while the Heap lock is held.

the garbage collector while the Heap lock is held.

Move also the "ready" trigger after the installation of the signal handler and
the call to siginterrupt().

Use a timeout of 5 seconds instead of 3. Two seconds are supposed to be enough,
but some of our buildbots are really slow (especially the FreeBSD 6 VM).

Move also the "ready" trigger after the installation of the signal handler and
the call to siginterrupt().

Use a timeout of 5 seconds instead of 3. Two seconds are supposed to be enough,
but some of our buildbots are really slow (especially the FreeBSD 6 VM).

Backport commits 968b9ff9a059 and aff0a7b0cb12 from the default branch to 3.2
branch. Extract of the changelog messages:

"The previous tests used time.sleep() to synchronize two processes. If the host
was too slow, the test could fail.

The new tests only use one process, but they use a subprocess to:

- have only one thread
- have a timeout on the blocking read (select cannot be used in the test,
select always fail with EINTR, the kernel doesn't restart it)
- not touch signal handling of the parent process"

and

"Add a basic synchronization code between the child and the parent processes:
the child writes "ready" to stdout."

I replaced .communicate(timeout=3.0) by an explicit waiting loop using
Popen.poll().

on platforms with known OS bugs

Share the list of platforms with known OS bugs with other tests. Patch written
by Charles-François Natali.

with known OS bugs

Share the list of platforms with known OS bugs with other tests. Patch written
by Charles-François Natali.

it is interrupted by a signal, instead of having to wait until the next
instruction.

Patch reviewed by Antoine Pitrou.

TemporaryFileTests has tests for os.tempnam() and os.tmpfile(), functions
removed from Python 3.

Move fdopen() tests to the FileTests testcase to test fdopen() on a file
descriptor, not on a directory descriptor (which raises an error on Windows).

TemporaryFileTests has tests for os.tempnam() and os.tmpfile(), functions
removed from Python 3.

Move fdopen() tests to the FileTests testcase to test fdopen() on a file
descriptor, not on a directory descriptor (which raises an error on Windows).

py-list displays the error. py-bt ignores the error (the filename and line
number is already displayed).

py-list displays the error. py-bt ignores the error (the filename and line
number is already displayed).