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- #ifndef Py_CEVAL_H
- #define Py_CEVAL_H
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- /***********************************************************
- Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum,
- Amsterdam, The Netherlands.
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- provided that the above copyright notice appear in all copies and that
- both that copyright notice and this permission notice appear in
- supporting documentation, and that the names of Stichting Mathematisch
- Centrum or CWI not be used in advertising or publicity pertaining to
- distribution of the software without specific, written prior permission.
-
- STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
- THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
- FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
- FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
- OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
- ******************************************************************/
-
- /* Interface to random parts in ceval.c */
-
- object *call_object PROTO((object *, object *));
-
- object *getglobals PROTO((void));
- object *getlocals PROTO((void));
- object *getowner PROTO((void));
- object *getframe PROTO((void));
-
- void printtraceback PROTO((object *));
- void flushline PROTO((void));
-
- int Py_AddPendingCall PROTO((int (*func) PROTO((ANY *)), ANY *arg));
- int Py_MakePendingCalls PROTO((void));
-
-
- /* Interface for threads.
-
- A module that plans to do a blocking system call (or something else
- that lasts a long time and doesn't touch Python data) can allow other
- threads to run as follows:
-
- ...preparations here...
- BGN_SAVE
- ...blocking system call here...
- END_SAVE
- ...interpretr result here...
-
- The BGN_SAVE/END_SAVE pair expands to a {}-surrounded block.
- To leave the block in the middle (e.g., with return), you must insert
- a line containing RET_SAVE before the return, e.g.
-
- if (...premature_exit...) {
- RET_SAVE
- err_errno(IOError);
- return NULL;
- }
-
- An alternative is:
-
- RET_SAVE
- if (...premature_exit...) {
- err_errno(IOError);
- return NULL;
- }
- RES_SAVE
-
- For convenience, that the value of 'errno' is restored across
- END_SAVE and RET_SAVE.
-
- WARNING: NEVER NEST CALLS TO BGN_SAVE AND END_SAVE!!!
-
- The function init_save_thread() should be called only from
- initthread() in "threadmodule.c".
-
- Note that not yet all candidates have been converted to use this
- mechanism!
- */
-
- extern void init_save_thread PROTO((void));
- extern object *save_thread PROTO((void));
- extern void restore_thread PROTO((object *));
-
- #ifdef WITH_THREAD
-
- #define BGN_SAVE { \
- object *_save; \
- _save = save_thread();
- #define RET_SAVE restore_thread(_save);
- #define RES_SAVE _save = save_thread();
- #define END_SAVE restore_thread(_save); \
- }
-
- #else /* !WITH_THREAD */
-
- #define BGN_SAVE {
- #define RET_SAVE
- #define RES_SAVE
- #define END_SAVE }
-
- #endif /* !WITH_THREAD */
-
- #ifdef __cplusplus
- }
- #endif
- #endif /* !Py_CEVAL_H */
-