Commit Graph

119 Commits

Author SHA1 Message Date
Thomas Heller fbb9c0bf3c Issue #1798: Add ctypes calling convention that allows safe access of errno.
ctypes maintains thread-local storage that has space for two error
numbers: private copies of the system 'errno' value and, on Windows,
the system error code accessed by the GetLastError() and
SetLastError() api functions.

Foreign functions created with CDLL(..., use_errno=True), when called,
swap the system 'errno' value with the private copy just before the
actual function call, and swapped again immediately afterwards.  The
'use_errno' parameter defaults to False, in this case 'ctypes_errno'
is not touched.

On Windows, foreign functions created with CDLL(...,
use_last_error=True) or WinDLL(..., use_last_error=True) swap the
system LastError value with the ctypes private copy.

The values are also swapped immeditately before and after ctypes
callback functions are called, if the callbacks are constructed using
the new optional use_errno parameter set to True: CFUNCTYPE(...,
use_errno=TRUE) or WINFUNCTYPE(..., use_errno=True).

New ctypes functions are provided to access the ctypes private copies
from Python:

- ctypes.set_errno(value) and ctypes.set_last_error(value) store
  'value' in the private copy and returns the previous value.

- ctypes.get_errno() and ctypes.get_last_error() returns the current
  ctypes private copies value.
2008-06-06 08:33:46 +00:00
Thomas Heller 2e75c450d2 Backport from py3k: Implement the new buffer interface from pep3118
for ctypes instances.  Closes issue #2404.
2008-06-05 17:51:15 +00:00
Thomas Heller d5bb9215c9 Revert revisions 63943 and 63942 (Issue #1798: Add ctypes calling
convention that allows safe access to errno)

This code does not yet work on OS X (__thread storage specifier not
available), so i needs a configure check plus a more portable
solution.
2008-06-04 20:22:05 +00:00
Thomas Heller e70c3378c0 Issue #1798: Add ctypes calling convention that allows safe access to
errno (and LastError, on Windows).

ctypes maintains a module-global, but thread-local, variable that
contains an error number; called 'ctypes_errno' for this discussion.
This variable is a private copy of the systems 'errno' value; the copy
is swapped with the 'errno' variable on several occasions.

Foreign functions created with CDLL(..., use_errno=True), when called,
swap the values just before the actual function call, and swapped
again immediately afterwards.  The 'use_errno' parameter defaults to
False, in this case 'ctypes_errno' is not touched.

The values are also swapped immeditately before and after ctypes
callback functions are called, if the callbacks are constructed using
the new optional use_errno parameter set to True: CFUNCTYPE(..., use_errno=TRUE)
or WINFUNCTYPE(..., use_errno=True).

Two new ctypes functions are provided to access the 'ctypes_errno'
value from Python:

- ctypes.set_errno(value) sets ctypes_errno to 'value', the previous
  ctypes_errno value is returned.

- ctypes.get_errno() returns the current ctypes_errno value.

---

On Windows, the same scheme is implemented for the error value which
is managed by the GetLastError() and SetLastError() windows api calls.

The ctypes functions are 'ctypes.set_last_error(value)' and
'ctypes.get_last_error()', the CDLL and WinDLL optional parameter is
named 'use_last_error', defaults to False.

---

On Windows, TlsSetValue and TlsGetValue calls are used to provide
thread local storage for the variables; ctypes compiled with __GNUC__
uses __thread variables.
2008-06-04 18:59:03 +00:00
Thomas Heller 261b136321 Fix the -x flag so that is does work. 2008-06-02 20:07:46 +00:00
Thomas Heller 9287acf83d ctypes NULL function pointers have a boolean False value now. 2008-05-29 19:42:34 +00:00
Thomas Heller 6c78f553ae Oops, get_tests may be called with 3 arguments. 2008-05-21 19:47:44 +00:00
Thomas Heller 7d9e721586 The -x <test1[,test2...]> flag allows to exclude tests. 2008-05-21 18:47:02 +00:00
Thomas Heller ee130b72f8 Very simple test for ctypes.util.find_library on Windows. 2008-05-16 20:19:07 +00:00
Thomas Heller 95ba13fa85 Issue 1793: Add ctypes.util.find_msvcrt() function (on Windows). 2008-05-16 20:06:31 +00:00
Thomas Heller 6ad5fbb7ea Add from_buffer and from_buffer_copy class methods to ctypes types. 2008-04-25 15:44:16 +00:00
Thomas Heller 046e6a43ff Issue #2616: Implement ctypes.pointer() and ctypes.POINTER() in C for
better performance.
2008-04-14 16:10:07 +00:00
Thomas Heller 8e8ba151dd Issue #2543: Make ctypes compatible (again) with Python 2.3, 2.4, and 2.5. 2008-04-04 08:35:44 +00:00
Thomas Heller f3c0559b5e Issue 1872: Changed the struct module typecode from 't' to '?', for
compatibility with PEP3118.
2008-03-05 15:34:29 +00:00
Christian Heimes c5f05e45cf Patch #2167 from calvin: Remove unused imports 2008-02-23 17:40:11 +00:00
Thomas Heller 8982cf5484 Replace 'has_key()' with 'in'.
Replace 'raise Error, stuff' with 'raise Error(stuff)'.
2008-02-21 18:52:20 +00:00
Thomas Heller 4516451aec Make the test somewhat clearer (I hope). 2008-02-13 20:36:51 +00:00
Thomas Heller a06a1a88ee Add pickle support to ctypes types. 2008-02-13 20:21:53 +00:00
Thomas Heller 99120c4f7e Revert rev. 59925, it breaks comtypes (I need to further examine this). 2008-01-28 08:44:13 +00:00
Thomas Heller 5ca924038d Invert the checks in get_[u]long and get_[u]longlong. The intent was
to not accept float types; the result was that integer-like objects
were not accepted.

Ported from release25-maint.
2008-01-24 19:15:02 +00:00
Thomas Heller 0f75f9847a Use 'g' instead of 'D' as the ctypes typecode for c_longdouble, for
compliance with PEP 3118.
2008-01-16 20:34:37 +00:00
Thomas Heller 415c1e36a9 Raise a TypeError instead of a ValueError when too many initializers
are used in a Structure or Union constructor.
2008-01-16 19:45:51 +00:00
Thomas Heller 02ec289f3e Raise a TypeError if conflicting positional and named arguments are
passed to a Structure or Union constructor.
2008-01-16 19:37:33 +00:00
Thomas Heller 902d30752f Convert the internal ctypes array type cache to a WeakValueDict so
that array types do not live longer than needed.
2008-01-16 19:16:27 +00:00
Thomas Heller c682614df0 Raise an error instead of crashing with a segfault when a NULL
function pointer is called.

Will backport to release25-maint.
2008-01-11 19:34:06 +00:00
Thomas Heller 153038efa4 Issue #1642: Fix segfault in ctypes when trying to delete attributes. 2007-12-18 19:00:34 +00:00
Thomas Heller 03fd077482 Enable the full ctypes c_longdouble tests again. 2007-11-02 19:11:23 +00:00
Thomas Heller e7becc5007 Added unittest for calling a function with paramflags (backport from py3k branch). 2007-10-24 19:50:45 +00:00
Thomas Heller 7fee6dd2a3 On OS X, use os.uname() instead of gestalt.sysv(...) to get the
operating system version.  This allows to use ctypes when Python
was configured with --disable-toolbox-glue.
2007-10-11 19:51:32 +00:00
Thomas Heller a7f49f733b ctypes.util.find_library uses dump(1) instead of objdump(1) on Solaris.
Fixes issue #1777530; will backport to release25-maint.
2007-09-14 19:40:35 +00:00
Thomas Heller 0b7120258a Disable some tests that fail on the 'ppc Debian unstable' buildbot to
find out if they cause the segfault on the 'alpha Debian' machine.
2007-09-11 19:17:48 +00:00
Thomas Heller 2e638c3a8a Backport from py3k branch:
Add a workaround for a strange bug on win64, when _ctypes is compiled
with the SDK compiler.  This should fix the failing
Lib\ctypes\test\test_as_parameter.py test.
2007-09-07 09:33:24 +00:00
Thomas Heller 2825b2ea44 Add a 'c_longdouble' type to the ctypes module. 2007-09-07 06:32:17 +00:00
Thomas Wouters dcb3c382ac Somewhat-preliminary slice-object and extended slicing support for ctypes.
The exact behaviour of omitted and negative indices for the Pointer type may
need a closer look (especially as it's subtly different from simple slices)
but there's time yet before 2.6, and not enough before 3.0a1 :-)
2007-08-30 21:01:17 +00:00
Neal Norwitz 60b52bd4ed Fix typo in docstring (missing c in reacquire) 2007-08-26 01:08:16 +00:00
Thomas Heller fa704c6ade Fix for SF# 1701409: segfault in c_char_p of ctypes. The repr output
of c_char_p and c_wchar_p has changed as a sideeffect.
2007-07-13 17:12:23 +00:00
Thomas Heller ad0cfe3dd7 Do not try to load the GLUT library in the ctypes tests. This test
adds little value, but has a large problem on OS X, as explained in
SF# 1581906.
2007-07-13 16:50:43 +00:00
Thomas Heller 1fd1cc5be2 Add tests for _ctypes.COMError. 2007-07-13 14:18:06 +00:00
Thomas Heller 1b9e041812 Make this test work with older Python releases where struct has no 't' format character. 2007-06-08 16:10:27 +00:00
Thomas Heller b4eec28e33 Correct the name of a field in the WIN32_FIND_DATAA and WIN32_FIND_DATAW structures.
Closes bug #1726026.
2007-05-30 07:01:25 +00:00
Thomas Heller 2ebc4d8054 Oops, these tests do not run on Windows CE. 2007-05-04 19:56:32 +00:00
Thomas Heller 1ad576c267 Do not truncate 64-bit pointers to 32-bit integers.
Fixes SF #1703286, will backport to release25-maint.
2007-05-04 19:54:22 +00:00
Thomas Heller 0455214f1c Fix some ctypes test crashes, when running with a debug Python
version on win64 by using proper argtypes and restype function
attributes.
2007-05-04 07:14:39 +00:00
Neal Norwitz 0d4c06e06e Whitespace normalization. Ugh, we really need to do this more often.
You might want to review this change as it's my first time.  Be gentle. :-)
2007-04-25 06:30:05 +00:00
Thomas Heller 5dc4fe09b7 Patch #1649190: Adding support for _Bool to ctypes as c_bool, by David Remahl. 2007-03-13 20:42:52 +00:00
Thomas Heller 2456a3c02a Bug #1651235: When a tuple was passed to a ctypes function call,
Python would crash instead of raising an error.

The crash was caused by a section of code that should have been
removed long ago, at that time ctypes had other ways to pass
parameters to function calls.
2007-03-09 20:39:22 +00:00
Thomas Heller c2f7725c86 Fix bug #1646630: ctypes.string_at(buf, 0) and ctypes.wstring_at(buf, 0)
returned string up to the first NUL character.
2007-03-09 19:21:28 +00:00
Thomas Heller d059e7b423 patch #1610795: BSD version of ctypes.util.find_library, by Martin
Kammerhofer.

release25-maint backport candidate, but the release manager has to
decide.
2007-01-12 20:17:34 +00:00
Thomas Heller 572104ff5c Avoid warnings in the test suite because ctypes.wintypes cannot be
imported on non-windows systems.
2007-01-12 20:08:19 +00:00
Thomas Heller f5b5183a19 Correct the comments: the code is right. 2007-01-11 21:23:12 +00:00