gh-114271: Make thread._rlock thread-safe in free-threaded builds
#115102
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The ID of the owning thread (`rlock_owner`) may be accessed by multiple threads without holding the underlying lock; relaxed atomics are used in place of the previous loads/stores. The number of times that the lock has been acquired (`rlock_count`) is only ever accessed by the thread that holds the lock; we do not need to use atomics to access it. The embedded lock (`rlock_lock`) is already thread-safe.
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woodruffw
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Mar 4, 2024
…ilds (python#115102) The ID of the owning thread (`rlock_owner`) may be accessed by multiple threads without holding the underlying lock; relaxed atomics are used in place of the previous loads/stores. The number of times that the lock has been acquired (`rlock_count`) is only ever accessed by the thread that holds the lock; we do not need to use atomics to access it.
diegorusso
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Apr 17, 2024
…ilds (python#115102) The ID of the owning thread (`rlock_owner`) may be accessed by multiple threads without holding the underlying lock; relaxed atomics are used in place of the previous loads/stores. The number of times that the lock has been acquired (`rlock_count`) is only ever accessed by the thread that holds the lock; we do not need to use atomics to access it.
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The ID of the owning thread (
rlock_owner) may be accessed by multiple threads without holding the underlying lock; relaxed atomics are used in place of the previous loads/stores.The number of times that the lock has been acquired (
rlock_count) is only ever accessed by the thread that holds the lock; we do not need to use atomics to access it.The embedded lock (
rlock_lock) is already thread-safe._threadmodule.cthread-safe in--disable-gilbuilds #114271