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kernel: start the semaphore wait timer after the early returns (#1173)

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Wait() read the clock and looked up the thread id before checking for an available token. Both are only needed once the thread has to block.
This commit is contained in:
Romain Hedouin
2026-10-08 17:21:36 +02:00
committed by GitHub
parent aa3b2cd57f
commit 4e14eed770
1 changed files with 6 additions and 6 deletions
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src/kernel/semaphore.cpp
+6 -6
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@@ -198,12 +198,6 @@ KernelSemaPrivate::Result KernelSemaPrivate::Wait(int need_count, uint32_t* ptr_
infinitely = false; infinitely = false;
} }
uint32_t elapsed = 0;
Common::Timer t;
t.Start();
int id = Common::Thread::GetThreadIdUnique();
if (m_count >= need_count) { if (m_count >= need_count) {
m_count -= need_count; m_count -= need_count;
if (ptr_micros != nullptr) { if (ptr_micros != nullptr) {
@@ -216,6 +210,12 @@ KernelSemaPrivate::Result KernelSemaPrivate::Wait(int need_count, uint32_t* ptr_
return Result::TimedOut; return Result::TimedOut;
} }
uint32_t elapsed = 0;
Common::Timer t;
t.Start();
int id = Common::Thread::GetThreadIdUnique();
WaitingThread waiter {}; WaitingThread waiter {};
waiter.id = id; waiter.id = id;
waiter.priority = (m_fifo_order ? 0 : Libs::LibKernel::PthreadGetCurrentPriorityForKernel()); waiter.priority = (m_fifo_order ? 0 : Libs::LibKernel::PthreadGetCurrentPriorityForKernel());