mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-05 05:08:44 +00:00
d26d7ae0e4
Building o//third_party/python now takes 5 seconds on my PC This change works towards modifying Python to use runtime dispatching when appropriate. For example, when loading the magnums in the socket module, it's a good idea to check if the magnum is zero, because that means the local system platform doesn't support it.
235 lines
8.3 KiB
C
235 lines
8.3 KiB
C
#ifndef Py_CEVAL_H
|
|
#define Py_CEVAL_H
|
|
COSMOPOLITAN_C_START_
|
|
/* clang-format off */
|
|
|
|
/* Interface to random parts in ceval.c */
|
|
|
|
PyAPI_FUNC(PyObject *) PyEval_CallObjectWithKeywords(
|
|
PyObject *func, PyObject *args, PyObject *kwargs);
|
|
|
|
/* Inline this */
|
|
#define PyEval_CallObject(func,arg) \
|
|
PyEval_CallObjectWithKeywords(func, arg, (PyObject *)NULL)
|
|
|
|
PyAPI_FUNC(PyObject *) PyEval_CallFunction(PyObject *obj,
|
|
const char *format, ...);
|
|
PyAPI_FUNC(PyObject *) PyEval_CallMethod(PyObject *obj,
|
|
const char *methodname,
|
|
const char *format, ...);
|
|
|
|
#ifndef Py_LIMITED_API
|
|
PyAPI_FUNC(void) PyEval_SetProfile(Py_tracefunc, PyObject *);
|
|
PyAPI_FUNC(void) PyEval_SetTrace(Py_tracefunc, PyObject *);
|
|
PyAPI_FUNC(void) _PyEval_SetCoroutineWrapper(PyObject *);
|
|
PyAPI_FUNC(PyObject *) _PyEval_GetCoroutineWrapper(void);
|
|
PyAPI_FUNC(void) _PyEval_SetAsyncGenFirstiter(PyObject *);
|
|
PyAPI_FUNC(PyObject *) _PyEval_GetAsyncGenFirstiter(void);
|
|
PyAPI_FUNC(void) _PyEval_SetAsyncGenFinalizer(PyObject *);
|
|
PyAPI_FUNC(PyObject *) _PyEval_GetAsyncGenFinalizer(void);
|
|
#endif
|
|
|
|
struct _frame; /* Avoid including frameobject.h */
|
|
|
|
PyAPI_FUNC(PyObject *) PyEval_GetBuiltins(void);
|
|
PyAPI_FUNC(PyObject *) PyEval_GetGlobals(void);
|
|
PyAPI_FUNC(PyObject *) PyEval_GetLocals(void);
|
|
PyAPI_FUNC(struct _frame *) PyEval_GetFrame(void);
|
|
|
|
#ifndef Py_LIMITED_API
|
|
/* Helper to look up a builtin object */
|
|
PyAPI_FUNC(PyObject *) _PyEval_GetBuiltinId(_Py_Identifier *);
|
|
/* Look at the current frame's (if any) code's co_flags, and turn on
|
|
the corresponding compiler flags in cf->cf_flags. Return 1 if any
|
|
flag was set, else return 0. */
|
|
PyAPI_FUNC(int) PyEval_MergeCompilerFlags(PyCompilerFlags *cf);
|
|
#endif
|
|
|
|
PyAPI_FUNC(int) Py_AddPendingCall(int (*func)(void *), void *arg);
|
|
PyAPI_FUNC(void) _PyEval_SignalReceived(void);
|
|
PyAPI_FUNC(int) Py_MakePendingCalls(void);
|
|
|
|
/* Protection against deeply nested recursive calls
|
|
|
|
In Python 3.0, this protection has two levels:
|
|
* normal anti-recursion protection is triggered when the recursion level
|
|
exceeds the current recursion limit. It raises a RecursionError, and sets
|
|
the "overflowed" flag in the thread state structure. This flag
|
|
temporarily *disables* the normal protection; this allows cleanup code
|
|
to potentially outgrow the recursion limit while processing the
|
|
RecursionError.
|
|
* "last chance" anti-recursion protection is triggered when the recursion
|
|
level exceeds "current recursion limit + 50". By construction, this
|
|
protection can only be triggered when the "overflowed" flag is set. It
|
|
means the cleanup code has itself gone into an infinite loop, or the
|
|
RecursionError has been mistakingly ignored. When this protection is
|
|
triggered, the interpreter aborts with a Fatal Error.
|
|
|
|
In addition, the "overflowed" flag is automatically reset when the
|
|
recursion level drops below "current recursion limit - 50". This heuristic
|
|
is meant to ensure that the normal anti-recursion protection doesn't get
|
|
disabled too long.
|
|
|
|
Please note: this scheme has its own limitations. See:
|
|
http://mail.python.org/pipermail/python-dev/2008-August/082106.html
|
|
for some observations.
|
|
*/
|
|
PyAPI_FUNC(void) Py_SetRecursionLimit(int);
|
|
PyAPI_FUNC(int) Py_GetRecursionLimit(void);
|
|
|
|
#define Py_EnterRecursiveCall(where) \
|
|
(_Py_MakeRecCheck(PyThreadState_GET()->recursion_depth) && \
|
|
_Py_CheckRecursiveCall(where))
|
|
#define Py_LeaveRecursiveCall() \
|
|
do{ if(_Py_MakeEndRecCheck(PyThreadState_GET()->recursion_depth)) \
|
|
PyThreadState_GET()->overflowed = 0; \
|
|
} while(0)
|
|
PyAPI_FUNC(int) _Py_CheckRecursiveCall(const char *where);
|
|
PyAPI_DATA(int) _Py_CheckRecursionLimit;
|
|
|
|
#ifdef USE_STACKCHECK
|
|
/* With USE_STACKCHECK, we artificially decrement the recursion limit in order
|
|
to trigger regular stack checks in _Py_CheckRecursiveCall(), except if
|
|
the "overflowed" flag is set, in which case we need the true value
|
|
of _Py_CheckRecursionLimit for _Py_MakeEndRecCheck() to function properly.
|
|
*/
|
|
# define _Py_MakeRecCheck(x) \
|
|
(++(x) > (_Py_CheckRecursionLimit += PyThreadState_GET()->overflowed - 1))
|
|
#else
|
|
# define _Py_MakeRecCheck(x) (++(x) > _Py_CheckRecursionLimit)
|
|
#endif
|
|
|
|
/* Compute the "lower-water mark" for a recursion limit. When
|
|
* Py_LeaveRecursiveCall() is called with a recursion depth below this mark,
|
|
* the overflowed flag is reset to 0. */
|
|
#define _Py_RecursionLimitLowerWaterMark(limit) \
|
|
(((limit) > 200) \
|
|
? ((limit) - 50) \
|
|
: (3 * ((limit) >> 2)))
|
|
|
|
#define _Py_MakeEndRecCheck(x) \
|
|
(--(x) < _Py_RecursionLimitLowerWaterMark(_Py_CheckRecursionLimit))
|
|
|
|
#define Py_ALLOW_RECURSION \
|
|
do { unsigned char _old = PyThreadState_GET()->recursion_critical;\
|
|
PyThreadState_GET()->recursion_critical = 1;
|
|
|
|
#define Py_END_ALLOW_RECURSION \
|
|
PyThreadState_GET()->recursion_critical = _old; \
|
|
} while(0);
|
|
|
|
PyAPI_FUNC(const char *) PyEval_GetFuncName(PyObject *);
|
|
PyAPI_FUNC(const char *) PyEval_GetFuncDesc(PyObject *);
|
|
|
|
PyAPI_FUNC(PyObject *) PyEval_GetCallStats(PyObject *);
|
|
PyAPI_FUNC(PyObject *) PyEval_EvalFrame(struct _frame *);
|
|
PyAPI_FUNC(PyObject *) PyEval_EvalFrameEx(struct _frame *f, int exc);
|
|
#ifndef Py_LIMITED_API
|
|
PyAPI_FUNC(PyObject *) _PyEval_EvalFrameDefault(struct _frame *f, int exc);
|
|
#endif
|
|
|
|
/* 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...
|
|
Py_BEGIN_ALLOW_THREADS
|
|
...blocking system call here...
|
|
Py_END_ALLOW_THREADS
|
|
...interpret result here...
|
|
|
|
The Py_BEGIN_ALLOW_THREADS/Py_END_ALLOW_THREADS pair expands to a
|
|
{}-surrounded block.
|
|
To leave the block in the middle (e.g., with return), you must insert
|
|
a line containing Py_BLOCK_THREADS before the return, e.g.
|
|
|
|
if (...premature_exit...) {
|
|
Py_BLOCK_THREADS
|
|
PyErr_SetFromErrno(PyExc_IOError);
|
|
return NULL;
|
|
}
|
|
|
|
An alternative is:
|
|
|
|
Py_BLOCK_THREADS
|
|
if (...premature_exit...) {
|
|
PyErr_SetFromErrno(PyExc_IOError);
|
|
return NULL;
|
|
}
|
|
Py_UNBLOCK_THREADS
|
|
|
|
For convenience, that the value of 'errno' is restored across
|
|
Py_END_ALLOW_THREADS and Py_BLOCK_THREADS.
|
|
|
|
WARNING: NEVER NEST CALLS TO Py_BEGIN_ALLOW_THREADS AND
|
|
Py_END_ALLOW_THREADS!!!
|
|
|
|
The function PyEval_InitThreads() should be called only from
|
|
init_thread() in "_threadmodule.c".
|
|
|
|
Note that not yet all candidates have been converted to use this
|
|
mechanism!
|
|
*/
|
|
|
|
PyAPI_FUNC(PyThreadState *) PyEval_SaveThread(void);
|
|
PyAPI_FUNC(void) PyEval_RestoreThread(PyThreadState *);
|
|
|
|
#ifdef WITH_THREAD
|
|
|
|
PyAPI_FUNC(int) PyEval_ThreadsInitialized(void);
|
|
PyAPI_FUNC(void) PyEval_InitThreads(void);
|
|
#ifndef Py_LIMITED_API
|
|
PyAPI_FUNC(void) _PyEval_FiniThreads(void);
|
|
#endif /* !Py_LIMITED_API */
|
|
PyAPI_FUNC(void) PyEval_AcquireLock(void);
|
|
PyAPI_FUNC(void) PyEval_ReleaseLock(void);
|
|
PyAPI_FUNC(void) PyEval_AcquireThread(PyThreadState *tstate);
|
|
PyAPI_FUNC(void) PyEval_ReleaseThread(PyThreadState *tstate);
|
|
PyAPI_FUNC(void) PyEval_ReInitThreads(void);
|
|
|
|
#ifndef Py_LIMITED_API
|
|
PyAPI_FUNC(void) _PyEval_SetSwitchInterval(unsigned long microseconds);
|
|
PyAPI_FUNC(unsigned long) _PyEval_GetSwitchInterval(void);
|
|
#endif
|
|
|
|
#ifndef Py_LIMITED_API
|
|
PyAPI_FUNC(Py_ssize_t) _PyEval_RequestCodeExtraIndex(freefunc);
|
|
#endif
|
|
|
|
#define Py_BEGIN_ALLOW_THREADS { \
|
|
PyThreadState *_save; \
|
|
_save = PyEval_SaveThread();
|
|
#define Py_BLOCK_THREADS PyEval_RestoreThread(_save);
|
|
#define Py_UNBLOCK_THREADS _save = PyEval_SaveThread();
|
|
#define Py_END_ALLOW_THREADS PyEval_RestoreThread(_save); \
|
|
}
|
|
|
|
#else /* !WITH_THREAD */
|
|
|
|
#define Py_BEGIN_ALLOW_THREADS {
|
|
#define Py_BLOCK_THREADS
|
|
#define Py_UNBLOCK_THREADS
|
|
#define Py_END_ALLOW_THREADS }
|
|
|
|
#endif /* !WITH_THREAD */
|
|
|
|
#ifndef Py_LIMITED_API
|
|
PyAPI_FUNC(int) _PyEval_SliceIndex(PyObject *, Py_ssize_t *);
|
|
PyAPI_FUNC(int) _PyEval_SliceIndexNotNone(PyObject *, Py_ssize_t *);
|
|
PyAPI_FUNC(void) _PyEval_SignalAsyncExc(void);
|
|
#endif
|
|
|
|
/* Masks and values used by FORMAT_VALUE opcode. */
|
|
#define FVC_MASK 0x3
|
|
#define FVC_NONE 0x0
|
|
#define FVC_STR 0x1
|
|
#define FVC_REPR 0x2
|
|
#define FVC_ASCII 0x3
|
|
#define FVS_MASK 0x4
|
|
#define FVS_HAVE_SPEC 0x4
|
|
|
|
COSMOPOLITAN_C_END_
|
|
#endif /* !Py_CEVAL_H */
|