1 #ifndef Py_INTERNAL_TUPLE_H 2 #define Py_INTERNAL_TUPLE_H 3 #ifdef __cplusplus 4 extern "C" { 5 #endif 6 7 #ifndef Py_BUILD_CORE 8 # error "this header requires Py_BUILD_CORE define" 9 #endif 10 11 #include "tupleobject.h" /* _PyTuple_CAST() */ 12 13 14 /* runtime lifecycle */ 15 16 extern PyStatus _PyTuple_InitGlobalObjects(PyInterpreterState *); 17 extern PyStatus _PyTuple_InitTypes(PyInterpreterState *); 18 extern void _PyTuple_Fini(PyInterpreterState *); 19 20 21 /* other API */ 22 23 // PyTuple_MAXSAVESIZE - largest tuple to save on free list 24 // PyTuple_MAXFREELIST - maximum number of tuples of each size to save 25 26 #if defined(PyTuple_MAXSAVESIZE) && PyTuple_MAXSAVESIZE <= 0 27 // A build indicated that tuple freelists should not be used. 28 # define PyTuple_NFREELISTS 0 29 # undef PyTuple_MAXSAVESIZE 30 # undef PyTuple_MAXFREELIST 31 32 #elif !defined(WITH_FREELISTS) 33 # define PyTuple_NFREELISTS 0 34 # undef PyTuple_MAXSAVESIZE 35 # undef PyTuple_MAXFREELIST 36 37 #else 38 // We are using a freelist for tuples. 39 # ifndef PyTuple_MAXSAVESIZE 40 # define PyTuple_MAXSAVESIZE 20 41 # endif 42 # define PyTuple_NFREELISTS PyTuple_MAXSAVESIZE 43 # ifndef PyTuple_MAXFREELIST 44 # define PyTuple_MAXFREELIST 2000 45 # endif 46 #endif 47 48 struct _Py_tuple_state { 49 #if PyTuple_NFREELISTS > 0 50 /* There is one freelist for each size from 1 to PyTuple_MAXSAVESIZE. 51 The empty tuple is handled separately. 52 53 Each tuple stored in the array is the head of the linked list 54 (and the next available tuple) for that size. The actual tuple 55 object is used as the linked list node, with its first item 56 (ob_item[0]) pointing to the next node (i.e. the previous head). 57 Each linked list is initially NULL. */ 58 PyTupleObject *free_list[PyTuple_NFREELISTS]; 59 int numfree[PyTuple_NFREELISTS]; 60 #else 61 char _unused; // Empty structs are not allowed. 62 #endif 63 }; 64 65 #define _PyTuple_ITEMS(op) (_PyTuple_CAST(op)->ob_item) 66 67 extern PyObject *_PyTuple_FromArray(PyObject *const *, Py_ssize_t); 68 extern PyObject *_PyTuple_FromArraySteal(PyObject *const *, Py_ssize_t); 69 70 #ifdef __cplusplus 71 } 72 #endif 73 #endif /* !Py_INTERNAL_TUPLE_H */ 74