Merge bitcoin/bitcoin#26189: refactor: Do not discard try_lock() return value

30cc1c6609 refactor: Drop `owns_lock()` call (Hennadii Stepanov)
bff4e068b6 refactor: Do not discard `try_lock()` return value (Hennadii Stepanov)

Pull request description:

  Microsoft's C++ Standard Library uses the `[[nodiscard]]` attribute for `try_lock()`.
  See: https://github.com/microsoft/STL/blob/main/stl/inc/mutex

  This change allows to drop the current suppression for the warning C4838 and helps to prevent the upcoming warning C4858.
  See: 539c26c923

  Fixes bitcoin/bitcoin#26017.

  Split from bitcoin/bitcoin#25819.

ACKs for top commit:
  vasild:
    ACK 30cc1c6609

Tree-SHA512: ce17404e1c78af4f763129753caf8e5a0e1c91ba398778fe912f9fcc56a847e8112460d1a1a35bf905a593b7d8e0b16c6b099ad74976b67dca5f4f3eda6ff621
This commit is contained in:
fanquake 2022-10-03 18:17:00 +01:00
commit 1730f6cb23
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@ -165,11 +165,11 @@ private:
bool TryEnter(const char* pszName, const char* pszFile, int nLine)
{
EnterCritical(pszName, pszFile, nLine, Base::mutex(), true);
Base::try_lock();
if (!Base::owns_lock()) {
LeaveCritical();
if (Base::try_lock()) {
return true;
}
return Base::owns_lock();
LeaveCritical();
return false;
}
public: