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[docs/advanced] Refer to deadlock.md from misc.rst

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Thomas Köppe 2024-10-02 20:17:40 +01:00
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@ -62,7 +62,11 @@ will acquire the GIL before calling the Python callback. Similarly, the
back into Python. back into Python.
When writing C++ code that is called from other C++ code, if that code accesses When writing C++ code that is called from other C++ code, if that code accesses
Python state, it must explicitly acquire and release the GIL. Python state, it must explicitly acquire and release the GIL. A separate
document on deadlocks [#f8]_ elaborates on a particularly subtle interaction
with C++'s block-scope static variable initializer guard mutexes.
.. [#f8] deadlock.md
The classes :class:`gil_scoped_release` and :class:`gil_scoped_acquire` can be The classes :class:`gil_scoped_release` and :class:`gil_scoped_acquire` can be
used to acquire and release the global interpreter lock in the body of a C++ used to acquire and release the global interpreter lock in the body of a C++
@ -142,6 +146,9 @@ following checklist.
destructors can sometimes get invoked in weird and unexpected circumstances as a result destructors can sometimes get invoked in weird and unexpected circumstances as a result
of exceptions. of exceptions.
- C++ static block-scope variable initialization that calls back into Python can
cause deadlocks; see [#f8]_ for a detailed discussion.
- You should try running your code in a debug build. That will enable additional assertions - You should try running your code in a debug build. That will enable additional assertions
within pybind11 that will throw exceptions on certain GIL handling errors within pybind11 that will throw exceptions on certain GIL handling errors
(reference counting operations). (reference counting operations).