libvirt_wrap.h

   1 /*
   2  * libvirt_wrap.h: type wrappers for libvir python bindings
   3  *
   4  * Copyright (C) 2005 Red Hat, Inc.
   5  *
   6  * Daniel Veillard <veillard@redhat.com>
   7  */
   8
   9 #include <Python.h>
  10 #include <libvirt/libvirt.h>
  11 #include <libvirt/virterror.h>
  12
  13 #ifdef __GNUC__
  14 #ifdef ATTRIBUTE_UNUSED
  15 #undef ATTRIBUTE_UNUSED
  16 #endif
  17 #ifndef ATTRIBUTE_UNUSED
  18 #define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
  19 #endif /* ATTRIBUTE_UNUSED */
  20 #else
  21 #define ATTRIBUTE_UNUSED
  22 #endif
  23
  24 #define PyvirConnect_Get(v) (((v) == Py_None) ? NULL : \
  25         (((PyvirConnect_Object *)(v))->obj))
  26
  27 typedef struct {
  28     PyObject_HEAD
  29     virConnectPtr obj;
  30 } PyvirConnect_Object;
  31
  32
  33 #define PyvirDomain_Get(v) (((v) == Py_None) ? NULL : \
  34         (((PyvirDomain_Object *)(v))->obj))
  35
  36 typedef struct {
  37     PyObject_HEAD
  38     virDomainPtr obj;
  39 } PyvirDomain_Object;
  40
  41
  42 PyObject * libvirt_intWrap(int val);
  43 PyObject * libvirt_longWrap(long val);
  44 PyObject * libvirt_longlongWrap(long long val);
  45 PyObject * libvirt_charPtrWrap(char *str);
  46 PyObject * libvirt_constcharPtrWrap(const char *str);
  47 PyObject * libvirt_charPtrConstWrap(const char *str);
  48 PyObject * libvirt_virConnectPtrWrap(virConnectPtr node);
  49 PyObject * libvirt_virDomainPtrWrap(virDomainPtr node);
  50
  51
  52 /* Provide simple macro statement wrappers (adapted from GLib, in turn from Perl):
  53  *  LIBVIRT_STMT_START { statements; } LIBVIRT_STMT_END;
  54  *  can be used as a single statement, as in
  55  *  if (x) LIBVIRT_STMT_START { ... } LIBVIRT_STMT_END; else ...
  56  *
  57  *  When GCC is compiling C code in non-ANSI mode, it will use the
  58  *  compiler __extension__ to wrap the statements wihin `({' and '})' braces.
  59  *  When compiling on platforms where configure has defined
  60  *  HAVE_DOWHILE_MACROS, statements will be wrapped with `do' and `while (0)'.
  61  *  For any other platforms (SunOS4 is known to have this issue), wrap the
  62  *  statements with `if (1)' and `else (void) 0'.
  63  */
  64 #if !(defined (LIBVIRT_STMT_START) && defined (LIBVIRT_STMT_END))
  65 # if defined (__GNUC__) && !defined (__STRICT_ANSI__) && !defined (__cplusplus)
  66 #  define LIBVIRT_STMT_START (void) __extension__ (
  67 #  define LIBVIRT_STMT_END )
  68 # else /* !(__GNUC__ && !__STRICT_ANSI__ && !__cplusplus) */
  69 #  if defined (HAVE_DOWHILE_MACROS)
  70 #   define LIBVIRT_STMT_START do
  71 #   define LIBVIRT_STMT_END while (0)
  72 #  else /* !HAVE_DOWHILE_MACROS */
  73 #   define LIBVIRT_STMT_START if (1)
  74 #   define LIBVIRT_STMT_END else (void) 0
  75 #  endif /* !HAVE_DOWHILE_MACROS */
  76 # endif /* !(__GNUC__ && !__STRICT_ANSI__ && !__cplusplus) */
  77 #endif
  78
  79 #define LIBVIRT_BEGIN_ALLOW_THREADS                     \
  80   LIBVIRT_STMT_START {                                  \
  81     PyThreadState *_save = NULL;                        \
  82     if (PyEval_ThreadsInitialized())                    \
  83       _save = PyEval_SaveThread();
  84
  85 #define LIBVIRT_END_ALLOW_THREADS                           \
  86   if (PyEval_ThreadsInitialized())                          \
  87     PyEval_RestoreThread(_save);                            \
  88     } LIBVIRT_STMT_END
  89
  90 #define LIBVIRT_ENSURE_THREAD_STATE                     \
  91   LIBVIRT_STMT_START {                                  \
  92   PyGILState_STATE _save;                               \
  93     if (PyEval_ThreadsInitialized())                    \
  94       _save = PyGILState_Ensure();
  95
  96 #define LIBVIRT_RELEASE_THREAD_STATE                           \
  97   if (PyEval_ThreadsInitialized())                             \
  98     PyGILState_Release(_save);                                 \
  99   } LIBVIRT_STMT_END
 100