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8e3b9f9283
Add _PyLong_GetZero() and _PyLong_GetOne() functions and a new internal pycore_long.h header file. Python cannot be built without small integer singletons anymore.
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
#ifndef Py_INTERNAL_LONG_H
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#define Py_INTERNAL_LONG_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef Py_BUILD_CORE
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# error "this header requires Py_BUILD_CORE define"
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#endif
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#include "pycore_interp.h" // PyInterpreterState.small_ints
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#include "pycore_pystate.h" // _PyThreadState_GET()
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// Don't call this function but _PyLong_GetZero() and _PyLong_GetOne()
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static inline PyObject* __PyLong_GetSmallInt_internal(int value)
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{
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PyThreadState *tstate = _PyThreadState_GET();
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#ifdef Py_DEBUG
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_Py_EnsureTstateNotNULL(tstate);
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#endif
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assert(-_PY_NSMALLNEGINTS <= value && value < _PY_NSMALLPOSINTS);
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size_t index = _PY_NSMALLNEGINTS + value;
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PyObject *obj = (PyObject*)tstate->interp->small_ints[index];
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// _PyLong_GetZero() and _PyLong_GetOne() must not be called
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// before _PyLong_Init() nor after _PyLong_Fini()
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assert(obj != NULL);
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return obj;
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}
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// Return a borrowed reference to the zero singleton.
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// The function cannot return NULL.
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static inline PyObject* _PyLong_GetZero(void)
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{ return __PyLong_GetSmallInt_internal(0); }
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// Return a borrowed reference to the one singleton.
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// The function cannot return NULL.
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static inline PyObject* _PyLong_GetOne(void)
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{ return __PyLong_GetSmallInt_internal(1); }
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_INTERNAL_LONG_H */
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