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kern: update KConditionVariable to support new has_waiter_flag rules

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This commit is contained in:
Michael Scire 2020-12-02 01:28:21 -08:00
parent 8e1a46b951
commit f058d04933
1 changed files with 13 additions and 0 deletions
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13
libraries/libmesosphere/source/kern_k_condition_variable.cpp
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@ -194,6 +194,12 @@ namespace ams::kern {
target_thread->ClearConditionVariable(); target_thread->ClearConditionVariable();
++num_waiters; ++num_waiters;
} }
/* If we have no waiters, clear the has waiter flag. */
if (it == this->tree.end() || it->GetConditionVariableKey() != cv_key) {
const u32 has_waiter_flag = 0;
WriteToUser(cv_key, std::addressof(has_waiter_flag));
}
} }
/* Close threads in the array. */ /* Close threads in the array. */
@ -244,6 +250,13 @@ namespace ams::kern {
next_owner_thread->Wakeup(); next_owner_thread->Wakeup();
} }
/* Write to the cv key. */
{
const u32 has_waiter_flag = 1;
WriteToUser(key, std::addressof(has_waiter_flag));
cpu::DataMemoryBarrier();
}
/* Write the value to userspace. */ /* Write the value to userspace. */
if (!WriteToUser(addr, std::addressof(next_value))) { if (!WriteToUser(addr, std::addressof(next_value))) {
slp.CancelSleep(); slp.CancelSleep();