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acf3bcc886
* gh-112532: Use separate mimalloc heaps for GC objects In `--disable-gil` builds, we now use four separate heaps in anticipation of using mimalloc to find GC objects when the GIL is disabled. To support this, we also make a few changes to mimalloc: * `mi_heap_t` and `mi_tld_t` initialization is split from allocation. This allows us to have a `mi_tld_t` per-`PyThreadState`, which is important to keep interpreter isolation, since the same OS thread may run in multiple interpreters (using different PyThreadStates.) * Heap abandoning (mi_heap_collect_ex) can now be called from a different thread than the one that created the heap. This is necessary because we may clear and delete the containing PyThreadStates from a different thread during finalization and after fork(). * Use enum instead of defines and guard mimalloc includes. * The enum typedef will be convenient for future PRs that use the type. * Guarding the mimalloc includes allows us to unconditionally include pycore_mimalloc.h from other header files that rely on things like `struct _mimalloc_thread_state`. * Only define _mimalloc_thread_state in Py_GIL_DISABLED builds
31 lines
748 B
C
31 lines
748 B
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_mimalloc.h" // struct _mimalloc_thread_state
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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 _mimalloc_thread_state mimalloc;
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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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