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cpython/Include/internal/pycore_tstate.h

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gh-112538: Add internal-only _PyThreadStateImpl "wrapper" for PyThreadState (gh-112560) Every PyThreadState instance is now actually a _PyThreadStateImpl. It is safe to cast from `PyThreadState*` to `_PyThreadStateImpl*` and back. The _PyThreadStateImpl will contain fields that we do not want to expose in the public C API.
2023-12-07 15:11:45 -04:00
#ifndef Py_INTERNAL_TSTATE_H
#define Py_INTERNAL_TSTATE_H
#ifdef __cplusplus
extern "C" {
#endif
#ifndef Py_BUILD_CORE
# error "this header requires Py_BUILD_CORE define"
#endif
gh-100240: Use a consistent implementation for freelists (#121934) This combines and updates our freelist handling to use a consistent implementation. Objects in the freelist are linked together using the first word of memory block. If configured with freelists disabled, these operations are essentially no-ops.
2024-07-22 13:08:27 -03:00
#include "pycore_brc.h" // struct _brc_thread_state
#include "pycore_freelist_state.h" // struct _Py_freelists
#include "pycore_mimalloc.h" // struct _mimalloc_thread_state
#include "pycore_qsbr.h" // struct qsbr
gh-112532: Use separate mimalloc heaps for GC objects (gh-113263) * 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
2023-12-26 12:53:20 -04:00
gh-112538: Add internal-only _PyThreadStateImpl "wrapper" for PyThreadState (gh-112560) Every PyThreadState instance is now actually a _PyThreadStateImpl. It is safe to cast from `PyThreadState*` to `_PyThreadStateImpl*` and back. The _PyThreadStateImpl will contain fields that we do not want to expose in the public C API.
2023-12-07 15:11:45 -04:00
// Every PyThreadState is actually allocated as a _PyThreadStateImpl. The
// PyThreadState fields are exposed as part of the C API, although most fields
// are intended to be private. The _PyThreadStateImpl fields not exposed.
typedef struct _PyThreadStateImpl {
// semi-public fields are in PyThreadState.
PyThreadState base;
gh-121621: Move asyncio_running_loop to private struct (#121939) This avoids changing the ABI and keeps the field in the private struct.
2024-07-17 19:21:24 -03:00
PyObject *asyncio_running_loop; // Strong reference
gh-115103: Implement delayed memory reclamation (QSBR) (#115180) This adds a safe memory reclamation scheme based on FreeBSD's "GUS" and quiescent state based reclamation (QSBR). The API provides a mechanism for callers to detect when it is safe to free memory that may be concurrently accessed by readers.
2024-02-16 16:25:19 -04:00
struct _qsbr_thread_state *qsbr; // only used by free-threaded build
gh-115103: Implement delayed free mechanism for free-threaded builds (#115367) This adds `_PyMem_FreeDelayed()` and supporting functions. The `_PyMem_FreeDelayed()` function frees memory with the same allocator as `PyMem_Free()`, but after some delay to ensure that concurrent lock-free readers have finished.
2024-02-20 14:04:37 -04:00
struct llist_node mem_free_queue; // delayed free queue
gh-115103: Implement delayed memory reclamation (QSBR) (#115180) This adds a safe memory reclamation scheme based on FreeBSD's "GUS" and quiescent state based reclamation (QSBR). The API provides a mechanism for callers to detect when it is safe to free memory that may be concurrently accessed by readers.
2024-02-16 16:25:19 -04:00
gh-112532: Use separate mimalloc heaps for GC objects (gh-113263) * 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
2023-12-26 12:53:20 -04:00
#ifdef Py_GIL_DISABLED
gh-112529: Make the GC scheduling thread-safe (#114880) 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.
2024-02-16 12:22:27 -04:00
struct _gc_thread_state gc;
gh-112532: Use separate mimalloc heaps for GC objects (gh-113263) * 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
2023-12-26 12:53:20 -04:00
struct _mimalloc_thread_state mimalloc;
gh-100240: Use a consistent implementation for freelists (#121934) This combines and updates our freelist handling to use a consistent implementation. Objects in the freelist are linked together using the first word of memory block. If configured with freelists disabled, these operations are essentially no-ops.
2024-07-22 13:08:27 -03:00
struct _Py_freelists freelists;
gh-110481: Implement inter-thread queue for biased reference counting (#114824) Biased reference counting maintains two refcount fields in each object: `ob_ref_local` and `ob_ref_shared`. The true refcount is the sum of these two fields. In some cases, when refcounting operations are split across threads, the ob_ref_shared field can be negative (although the total refcount must be at least zero). In this case, the thread that decremented the refcount requests that the owning thread give up ownership and merge the refcount fields.
2024-02-09 18:08:32 -04:00
struct _brc_thread_state brc;
gh-112532: Use separate mimalloc heaps for GC objects (gh-113263) * 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
2023-12-26 12:53:20 -04:00
#endif
gh-117439: Make refleak checking thread-safe without the GIL (#117469) This keeps track of the per-thread total reference count operations in PyThreadState in the free-threaded builds. The count is merged into the interpreter's total when the thread exits.
2024-04-08 13:11:36 -03:00
#if defined(Py_REF_DEBUG) && defined(Py_GIL_DISABLED)
Py_ssize_t reftotal; // this thread's total refcount operations
#endif
gh-112538: Add internal-only _PyThreadStateImpl "wrapper" for PyThreadState (gh-112560) Every PyThreadState instance is now actually a _PyThreadStateImpl. It is safe to cast from `PyThreadState*` to `_PyThreadStateImpl*` and back. The _PyThreadStateImpl will contain fields that we do not want to expose in the public C API.
2023-12-07 15:11:45 -04:00
} _PyThreadStateImpl;
#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_TSTATE_H */