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The GC keeps track of the number of allocations (less deallocations) since the last GC. This buffers the count in thread-local state and uses atomic operations to modify the per-interpreter count. The thread-local buffering avoids contention on shared state. A consequence is that the GC scheduling is not as precise, so "test_sneaky_frame_object" is skipped because it requires that the GC be run exactly after allocating a frame object.
43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
#ifndef Py_INTERNAL_TSTATE_H
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#define Py_INTERNAL_TSTATE_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_freelist.h" // struct _Py_freelist_state
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#include "pycore_mimalloc.h" // struct _mimalloc_thread_state
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#include "pycore_brc.h" // struct _brc_thread_state
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static inline void
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_PyThreadState_SetWhence(PyThreadState *tstate, int whence)
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{
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tstate->_whence = whence;
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}
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// Every PyThreadState is actually allocated as a _PyThreadStateImpl. The
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// PyThreadState fields are exposed as part of the C API, although most fields
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// are intended to be private. The _PyThreadStateImpl fields not exposed.
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typedef struct _PyThreadStateImpl {
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// semi-public fields are in PyThreadState.
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PyThreadState base;
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#ifdef Py_GIL_DISABLED
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struct _gc_thread_state gc;
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struct _mimalloc_thread_state mimalloc;
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struct _Py_object_freelists freelists;
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struct _brc_thread_state brc;
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#endif
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} _PyThreadStateImpl;
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_INTERNAL_TSTATE_H */
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