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Below code failed to compile on a 32 bit machine with error
typewrappers.c: In function 'libvirt_intUnwrap':
typewrappers.c:135:5: error: logical 'and' of mutually exclusive tests is always false [-Werror=logical-op]
cc1: all warnings being treated as errors
The patch fixes this error.
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Laszlo Ersek pointed out that in trying to convert a long to an
unsigned int, we used:
long long_val = ...;
if ((unsigned int)long_val == long_val)
According to C99 integer promotion rules, the if statement is
equivalent to:
(unsigned long)(unsigned int)long_val == (unsigned long)long_val
since you get an unsigned comparison if at least one side is
unsigned, using the largest rank of the two sides; but on 32-bit
platforms, where unsigned long and unsigned int are the same size,
this comparison is always true and ends up converting negative
long_val into posigive unsigned int values, rather than rejecting
the negative value as we had originally intended (python longs
are unbounded size, and we don't want to do silent modulo
arithmetic when converting to C code).
Fix this by using direct comparisons, rather than casting.
* python/typewrappers.c (libvirt_intUnwrap, libvirt_uintUnwrap)
(libvirt_ulongUnwrap, libvirt_ulonglongUnwrap): Fix conversion
checks.
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int libvirt_intUnwrap(PyObject *obj, int *val);
int libvirt_uintUnwrap(PyObject *obj, unsigned int *val);
int libvirt_longUnwrap(PyObject *obj, long *val);
int libvirt_ulongUnwrap(PyObject *obj, unsigned long *val);
int libvirt_longlongUnwrap(PyObject *obj, long long *val);
int libvirt_ulonglongUnwrap(PyObject *obj, unsigned long long *val);
int libvirt_doubleUnwrap(PyObject *obj, double *val);
int libvirt_boolUnwrap(PyObject *obj, bool *val);
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Return statements with parameter enclosed in parentheses were modified
and parentheses were removed. The whole change was scripted, here is how:
List of files was obtained using this command:
git grep -l -e '\<return\s*([^()]*\(([^()]*)[^()]*\)*)\s*;' | \
grep -e '\.[ch]$' -e '\.py$'
Found files were modified with this command:
sed -i -e \
's_^\(.*\<return\)\s*(\(\([^()]*([^()]*)[^()]*\)*\))\s*\(;.*$\)_\1 \2\4_' \
-e 's_^\(.*\<return\)\s*(\([^()]*\))\s*\(;.*$\)_\1 \2\3_'
Then checked for nonsense.
The whole command looks like this:
git grep -l -e '\<return\s*([^()]*\(([^()]*)[^()]*\)*)\s*;' | \
grep -e '\.[ch]$' -e '\.py$' | xargs sed -i -e \
's_^\(.*\<return\)\s*(\(\([^()]*([^()]*)[^()]*\)*\))\s*\(;.*$\)_\1 \2\4_' \
-e 's_^\(.*\<return\)\s*(\([^()]*\))\s*\(;.*$\)_\1 \2\3_'
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This patch starts the process of elevating the python binding code
to be on the same level as the rest of libvirt when it comes to
requiring good coding styles. Statically linking against the
libvirt_util library makes it much easier to write good code,
rather than having to open-code and reinvent things locally.
Done by global search and replace of s/free(/VIR_FREE(/, followed
by hand-inspection of remaining malloc and redundant memset.
* cfg.mk (exclude_file_name_regexp--sc_prohibit_raw_allocation):
Remove python from exemption.
* python/Makefile.am (INCLUDES): Add gnulib and src/util. Drop
$(top_builddir)/$(subdir), as automake already guarantees that.
(mylibs, myqemulibs): Pull in libvirt_util and gnulib.
(libvirtmod_la_CFLAGS): Catch compiler warnings if configured to
use -Werror.
* python/typewrappers.c (libvirt_charPtrSizeWrap)
(libvirt_charPtrWrap): Convert free to VIR_FREE.
* python/generator.py (print_function_wrapper): Likewise.
* python/libvirt-override.c: Likewise.
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I noticed some redundant code while preparing my next patch.
* python/generator.py (py_types): Fix 'const char *' mapping.
* python/typewrappers.h (libvirt_charPtrConstWrap): Drop.
* python/typewrappers.c (libvirt_charPtrConstWrap): Delete, since
it is identical to libvirt_constcharPtrWrap.
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The return values for the python version are different that the C version
of virStreamSend: on success we return a string, an error raises an exception,
and if the stream would block we return int(-2). We need to do this
since strings aren't passed by reference in python.
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On Fedore 14, virt-manager spews a bunch of warnings to the console:
/usr/lib64/python2.7/site-packages/libvirt.py:1781: PendingDeprecationWarning: The CObject type is marked Pending Deprecation in Python 2.7. Please use capsule objects instead.
Have libvirt use the capsule API if available. I've verified this compiles
fine on older python (2.6 in RHEL6 which doesn't have capsules), and
virt-manager seems to function fine.
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I have primarily followed the pattern of the 'secret' driver to provide
support for the missing python bindings for the network filter API.
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Signed-off-by: Chris Lalancette <clalance@redhat.com>
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Introduce a new public API that provides a way to get progress
info on currently running jobs on a virDomainpPtr. APIs that
are initially within scope of this idea are
virDomainMigrate
virDomainMigrateToURI
virDomainSave
virDomainRestore
virDomainCoreDump
These all take a potentially long time and benefit from monitoring.
The virDomainJobInfo struct allows for various pieces of information
to be reported
- Percentage completion
- Time
- Overall data
- Guest memory data
- Guest disk/file data
* include/libvirt/libvirt.h.in: Add virDomainGetJobInfo
* python/generator.py, python/libvirt-override-api.xml,
python/libvirt-override.c: Override for virDomainGetJobInfo API
* python/typewrappers.c, python/typewrappers.h: Introduce wrapper
for unsigned long long type
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* include/libvirt/libvirt.h.in: Public API contract for
virStreamPtr object
* src/libvirt_public.syms: Export data stream APIs
* src/libvirt_private.syms: Export internal helper APIs
* src/libvirt.c: Data stream API driver dispatch
* src/datatypes.h, src/datatypes.c: Internal helpers for virStreamPtr
object
* src/driver.h: Define internal driver API for streams
* .x-sc_avoid_write: Ignore src/libvirt.c because it trips
up on comments including write()
* python/Makefile.am: Add libvirt-override-virStream.py
* python/generator.py: Add rules for virStreamPtr class
* python/typewrappers.h, python/typewrappers.c: Wrapper
for virStreamPtr
* docs/libvirt-api.xml, docs/libvirt-refs.xml: Regenerate
with new APIs
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* README: New file describing what each file is used for
* livvirt-override.c, libvirt-override.py, libvirt-override-api.xml,
libvirt-override-virConnect.py: Manually written code overriding
the generator
* typewrappers.c, typewrappers.h: Data type wrappers
* generator.py: Automatically pre-prend contents of libvirt-override.py
to generated libvirt.py. Output into libvirt.py directly instead of
libvirtclass.py. Don't generate libvirtclass.txt at all. Write C
files into libvirt.c/.h directly
* Makefile.am: Remove rule for creating libvirt.py from libvirt-override.py
and libvirtclass.py, since generator.py does it directly
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