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| author | Sam Gross <colesbury@gmail.com> | 2024-02-09 22:08:32 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-02-09 22:08:32 (GMT) |
| commit | a3af3cb4f424034b56404704fdf8f18e8c0a9982 (patch) | |
| tree | 62ee00ea8725669a67c0fb9f7d8692fedf55bbae /Include/internal/pycore_tstate.h | |
| parent | a225520af941fb125a4ede77a617501dfb8b46da (diff) | |
| download | cpython-a3af3cb4f424034b56404704fdf8f18e8c0a9982.zip cpython-a3af3cb4f424034b56404704fdf8f18e8c0a9982.tar.gz cpython-a3af3cb4f424034b56404704fdf8f18e8c0a9982.tar.bz2 | |
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.
Diffstat (limited to 'Include/internal/pycore_tstate.h')
| -rw-r--r-- | Include/internal/pycore_tstate.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/Include/internal/pycore_tstate.h b/Include/internal/pycore_tstate.h index 472fa08..77a1dc5 100644 --- a/Include/internal/pycore_tstate.h +++ b/Include/internal/pycore_tstate.h @@ -10,6 +10,7 @@ extern "C" { #include "pycore_freelist.h" // struct _Py_freelist_state #include "pycore_mimalloc.h" // struct _mimalloc_thread_state +#include "pycore_brc.h" // struct _brc_thread_state // Every PyThreadState is actually allocated as a _PyThreadStateImpl. The @@ -22,6 +23,7 @@ typedef struct _PyThreadStateImpl { #ifdef Py_GIL_DISABLED struct _mimalloc_thread_state mimalloc; struct _Py_freelist_state freelist_state; + struct _brc_thread_state brc; #endif } _PyThreadStateImpl; |