Improve and fix mistake in cypclass trywlock implementation

27953f00 · Xavier Thompson · 05c09d62 · 27953f00
Commit 27953f00 authored Nov 09, 2020 by Xavier Thompson
Hide whitespace changes
Inline Side-by-side

Showing with 2 additions and 5 deletions

Cython/Utility/CyObjects.cpp Cython/Utility/CyObjects.cpp +2 -5

No files found.
--- a/Cython/Utility/CyObjects.cpp
+++ b/Cython/Utility/CyObjects.cpp
@@ -119,11 +119,8 @@
                }

                int CyObject_TRYWLOCK() const {
-                    uint32_t prev_readers = _readers;
-                    if (prev_readers == 0) {
-                        return _readers.compare_exchange_weak(prev_readers, HAS_WRITER) - 1;
-                    }
-                    return -1;
+                    uint32_t prev_readers = 0;
+                    return _readers.compare_exchange_strong(prev_readers, HAS_WRITER) - 1;
                }

                void CyObject_UNWLOCK() const {