codekingpro/portable-devtools

1#ifndef Py_INTERNAL_FREELIST_H2#define Py_INTERNAL_FREELIST_H3#ifdef __cplusplus4extern "C" {5#endif6 7#ifndef Py_BUILD_CORE8#  error "this header requires Py_BUILD_CORE define"9#endif10 11#include "pycore_freelist_state.h"      // struct _Py_freelists12#include "pycore_interp_structs.h"      // PyInterpreterState13#include "pycore_pyatomic_ft_wrappers.h" // FT_ATOMIC_STORE_PTR_RELAXED()14#include "pycore_pystate.h"             // _PyThreadState_GET15#include "pycore_stats.h"               // OBJECT_STAT_INC16 17static inline struct _Py_freelists *18_Py_freelists_GET(void)19{20    PyThreadState *tstate = _PyThreadState_GET();21#ifdef Py_DEBUG22    _Py_EnsureTstateNotNULL(tstate);23#endif24 25#ifdef Py_GIL_DISABLED26    return &((_PyThreadStateImpl*)tstate)->freelists;27#else28    return &tstate->interp->object_state.freelists;29#endif30}31 32// Pushes `op` to the freelist, calls `freefunc` if the freelist is full33#define _Py_FREELIST_FREE(NAME, op, freefunc) \34    _PyFreeList_Free(&_Py_freelists_GET()->NAME, _PyObject_CAST(op), \35                     Py_ ## NAME ## _MAXFREELIST, freefunc)36// Pushes `op` to the freelist, returns 1 if successful, 0 if the freelist is full37#define _Py_FREELIST_PUSH(NAME, op, limit) \38    _PyFreeList_Push(&_Py_freelists_GET()->NAME, _PyObject_CAST(op), limit)39 40// Pops a PyObject from the freelist, returns NULL if the freelist is empty.41#define _Py_FREELIST_POP(TYPE, NAME) \42    _Py_CAST(TYPE*, _PyFreeList_Pop(&_Py_freelists_GET()->NAME))43 44// Pops a non-PyObject data structure from the freelist, returns NULL if the45// freelist is empty.46#define _Py_FREELIST_POP_MEM(NAME) \47    _PyFreeList_PopMem(&_Py_freelists_GET()->NAME)48 49#define _Py_FREELIST_SIZE(NAME) (int)((_Py_freelists_GET()->NAME).size)50 51static inline int52_PyFreeList_Push(struct _Py_freelist *fl, void *obj, Py_ssize_t maxsize)53{54    if (fl->size < maxsize && fl->size >= 0) {55        FT_ATOMIC_STORE_PTR_RELAXED(*(void **)obj, fl->freelist);56        fl->freelist = obj;57        fl->size++;58        OBJECT_STAT_INC(to_freelist);59        return 1;60    }61    return 0;62}63 64static inline void65_PyFreeList_Free(struct _Py_freelist *fl, void *obj, Py_ssize_t maxsize,66                 freefunc dofree)67{68    if (!_PyFreeList_Push(fl, obj, maxsize)) {69        dofree(obj);70    }71}72 73static inline void *74_PyFreeList_PopNoStats(struct _Py_freelist *fl)75{76    void *obj = fl->freelist;77    if (obj != NULL) {78        assert(fl->size > 0);79        fl->freelist = *(void **)obj;80        fl->size--;81    }82    return obj;83}84 85static inline PyObject *86_PyFreeList_Pop(struct _Py_freelist *fl)87{88    PyObject *op = _PyFreeList_PopNoStats(fl);89    if (op != NULL) {90        OBJECT_STAT_INC(from_freelist);91        _Py_NewReference(op);92    }93    return op;94}95 96static inline void *97_PyFreeList_PopMem(struct _Py_freelist *fl)98{99    void *op = _PyFreeList_PopNoStats(fl);100    if (op != NULL) {101        OBJECT_STAT_INC(from_freelist);102    }103    return op;104}105 106extern void _PyObject_ClearFreeLists(struct _Py_freelists *freelists, int is_finalization);107 108#ifdef __cplusplus109}110#endif111#endif /* !Py_INTERNAL_FREELIST_H */112