147 lines
4.6 KiB
C
147 lines
4.6 KiB
C
#ifndef Py_CEVAL_H
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#define Py_CEVAL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/***********************************************************
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Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI or Corporation for National Research Initiatives or
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CNRI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior
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permission.
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While CWI is the initial source for this software, a modified version
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is made available by the Corporation for National Research Initiatives
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(CNRI) at the Internet address ftp://ftp.python.org.
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STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Interface to random parts in ceval.c */
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PyObject *PyEval_CallObjectWithKeywords
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Py_PROTO((PyObject *, PyObject *, PyObject *));
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/* Inline this */
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#define PyEval_CallObject(func,arg) \
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PyEval_CallObjectWithKeywords(func, arg, (PyObject *)NULL)
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#ifdef HAVE_STDARG_PROTOTYPES
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PyObject *PyEval_CallFunction Py_PROTO((PyObject *obj, char *format, ...));
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PyObject *PyEval_CallMethod Py_PROTO((PyObject *obj,
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char *methodname, char *format, ...));
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#else
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/* Better to have no prototypes at all for varargs functions in this case */
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PyObject *PyEval_CallFunction();
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PyObject *PyEval_CallMethod();
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#endif
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PyObject *PyEval_GetBuiltins Py_PROTO((void));
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PyObject *PyEval_GetGlobals Py_PROTO((void));
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PyObject *PyEval_GetLocals Py_PROTO((void));
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PyObject *PyEval_GetOwner Py_PROTO((void));
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PyObject *PyEval_GetFrame Py_PROTO((void));
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int PyEval_GetRestricted Py_PROTO((void));
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int Py_FlushLine Py_PROTO((void));
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int Py_AddPendingCall Py_PROTO((int (*func) Py_PROTO((ANY *)), ANY *arg));
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int Py_MakePendingCalls Py_PROTO((void));
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/* Interface for threads.
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A module that plans to do a blocking system call (or something else
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that lasts a long time and doesn't touch Python data) can allow other
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threads to run as follows:
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...preparations here...
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Py_BEGIN_ALLOW_THREADS
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...blocking system call here...
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Py_END_ALLOW_THREADS
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...interpret result here...
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The Py_BEGIN_ALLOW_THREADS/Py_END_ALLOW_THREADS pair expands to a
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{}-surrounded block.
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To leave the block in the middle (e.g., with return), you must insert
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a line containing RET_SAVE before the return, e.g.
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if (...premature_exit...) {
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Py_BLOCK_THREADS
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PyErr_SetFromErrno(PyExc_IOError);
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return NULL;
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}
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An alternative is:
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Py_BLOCK_THREADS
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if (...premature_exit...) {
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PyErr_SetFromErrno(PyExc_IOError);
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return NULL;
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}
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Py_UNBLOCK_THREADS
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For convenience, that the value of 'errno' is restored across
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Py_END_ALLOW_THREADS and RET_SAVE.
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WARNING: NEVER NEST CALLS TO Py_BEGIN_ALLOW_THREADS AND
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Py_END_ALLOW_THREADS!!!
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The function PyEval_InitThreads() should be called only from
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initthread() in "threadmodule.c".
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Note that not yet all candidates have been converted to use this
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mechanism!
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*/
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extern PyThreadState *PyEval_SaveThread Py_PROTO((void));
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extern void PyEval_RestoreThread Py_PROTO((PyThreadState *));
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#ifdef WITH_THREAD
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extern void PyEval_InitThreads Py_PROTO((void));
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extern void PyEval_AcquireLock Py_PROTO((void));
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extern void PyEval_ReleaseLock Py_PROTO((void));
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extern void PyEval_AcquireThread Py_PROTO((PyThreadState *tstate));
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extern void PyEval_ReleaseThread Py_PROTO((PyThreadState *tstate));
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#define Py_BEGIN_ALLOW_THREADS { \
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PyThreadState *_save; \
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_save = PyEval_SaveThread();
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#define Py_BLOCK_THREADS PyEval_RestoreThread(_save);
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#define Py_UNBLOCK_THREADS _save = PyEval_SaveThread();
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#define Py_END_ALLOW_THREADS PyEval_RestoreThread(_save); \
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}
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#else /* !WITH_THREAD */
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#define Py_BEGIN_ALLOW_THREADS {
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#define Py_BLOCK_THREADS
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#define Py_UNBLOCK_THREADS
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#define Py_END_ALLOW_THREADS }
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#endif /* !WITH_THREAD */
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_CEVAL_H */
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