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Make python bindings threaded, by dropping/acquiring Python GIL where needed

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This commit is contained in:
Daniel P. Berrange
2006-10-24 20:28:16 +00:00
parent 297a77f6da
commit 9e5645393e
4 changed files with 87 additions and 3 deletions
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50
python/libvirt_wrap.h
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@@ -48,3 +48,53 @@ PyObject * libvirt_charPtrConstWrap(const char *str);
PyObject * libvirt_virConnectPtrWrap(virConnectPtr node);
PyObject * libvirt_virDomainPtrWrap(virDomainPtr node);
/* Provide simple macro statement wrappers (adapted from GLib, in turn from Perl):
* LIBVIRT_STMT_START { statements; } LIBVIRT_STMT_END;
* can be used as a single statement, as in
* if (x) LIBVIRT_STMT_START { ... } LIBVIRT_STMT_END; else ...
*
* When GCC is compiling C code in non-ANSI mode, it will use the
* compiler __extension__ to wrap the statements wihin `({' and '})' braces.
* When compiling on platforms where configure has defined
* HAVE_DOWHILE_MACROS, statements will be wrapped with `do' and `while (0)'.
* For any other platforms (SunOS4 is known to have this issue), wrap the
* statements with `if (1)' and `else (void) 0'.
*/
#if !(defined (LIBVIRT_STMT_START) && defined (LIBVIRT_STMT_END))
# if defined (__GNUC__) && !defined (__STRICT_ANSI__) && !defined (__cplusplus)
# define LIBVIRT_STMT_START (void) __extension__ (
# define LIBVIRT_STMT_END )
# else /* !(__GNUC__ && !__STRICT_ANSI__ && !__cplusplus) */
# if defined (HAVE_DOWHILE_MACROS)
# define LIBVIRT_STMT_START do
# define LIBVIRT_STMT_END while (0)
# else /* !HAVE_DOWHILE_MACROS */
# define LIBVIRT_STMT_START if (1)
# define LIBVIRT_STMT_END else (void) 0
# endif /* !HAVE_DOWHILE_MACROS */
# endif /* !(__GNUC__ && !__STRICT_ANSI__ && !__cplusplus) */
#endif
#define LIBVIRT_BEGIN_ALLOW_THREADS \
LIBVIRT_STMT_START { \
PyThreadState *_save = NULL; \
if (PyEval_ThreadsInitialized()) \
_save = PyEval_SaveThread();
#define LIBVIRT_END_ALLOW_THREADS \
if (PyEval_ThreadsInitialized()) \
PyEval_RestoreThread(_save); \
} LIBVIRT_STMT_END
#define LIBVIRT_ENSURE_THREAD_STATE \
LIBVIRT_STMT_START { \
PyGILState_STATE _save; \
if (PyEval_ThreadsInitialized()) \
_save = PyGILState_Ensure();
#define LIBVIRT_RELEASE_THREAD_STATE \
if (PyEval_ThreadsInitialized()) \
PyGILState_Release(_save); \
} LIBVIRT_STMT_END