Cool_Tools/Atmosphere
1
0
Fork 0
mirror of https://github.com/Atmosphere-NX/Atmosphere.git synced 2024-11-24 07:40:26 +01:00
Code Issues Packages Projects Releases Wiki Activity

kern: KConditionVariable::SignalToAddress now emits dmb before userspace write

Browse Source
This commit is contained in:
Michael Scire 2023-02-21 10:42:24 -07:00 committed by SciresM
parent 035cebef9d
commit 008eb974d4
1 changed files with 19 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
libraries/libmesosphere/source/kern_k_condition_variable.cpp
View File

@ -78,7 +78,7 @@ namespace ams::kern {
/* Remove waiter thread. */
s32 num_waiters;
KThread *next_owner_thread = owner_thread->RemoveWaiterByKey(std::addressof(num_waiters), addr);
KThread * const next_owner_thread = owner_thread->RemoveWaiterByKey(std::addressof(num_waiters), addr);
/* Determine the next tag. */
u32 next_value = 0;
@ -87,6 +87,10 @@ namespace ams::kern {
if (num_waiters > 1) {
next_value |= ams::svc::HandleWaitMask;
}
}
/* Synchronize memory before proceeding. */
cpu::DataMemoryBarrierInnerShareable();
/* Write the value to userspace. */
Result result;
@ -96,15 +100,12 @@ namespace ams::kern {
result = svc::ResultInvalidCurrentMemory();
}
/* Signal the next owner thread. */
/* If necessary, signal the next owner thread. */
if (next_owner_thread != nullptr) {
next_owner_thread->EndWait(result);
R_RETURN(result);
} else {
/* Just write the value to userspace. */
R_UNLESS(WriteToUser(addr, std::addressof(next_value)), svc::ResultInvalidCurrentMemory());
R_SUCCEED();
}
R_RETURN(result);
}
}