From 4fcdbed9f661a37772db915904a852850037d84a Mon Sep 17 00:00:00 2001 From: bunnei Date: Sat, 20 Dec 2014 02:32:19 -0500 Subject: [PATCH] Thread: Wait current thread on svc_SleepThread - Removed unused VBLANK sleep mode - Added error log for bad context switch - Renamed VerifyWait to CheckWaitType to be more clear --- src/core/hle/kernel/thread.cpp | 53 +++++++++++++++++++++------------- src/core/hle/kernel/thread.h | 1 - src/core/hle/svc.cpp | 3 +- 3 files changed, 35 insertions(+), 22 deletions(-) diff --git a/src/core/hle/kernel/thread.cpp b/src/core/hle/kernel/thread.cpp index 47be22653a..834308926c 100644 --- a/src/core/hle/kernel/thread.cpp +++ b/src/core/hle/kernel/thread.cpp @@ -147,16 +147,19 @@ void ChangeReadyState(Thread* t, bool ready) { } } -/// Verify that a thread has not been released from waiting -static bool VerifyWait(const Thread* thread, WaitType type, Handle wait_handle) { - _dbg_assert_(Kernel, thread != nullptr); - return (type == thread->wait_type) && (wait_handle == thread->wait_handle) && (thread->IsWaiting()); +/// Check if a thread is blocking on a specified wait type +static bool CheckWaitType(const Thread* thread, WaitType type) { + return (type == thread->wait_type) && (thread->IsWaiting()); } -/// Verify that a thread has not been released from waiting (with wait address) -static bool VerifyWait(const Thread* thread, WaitType type, Handle wait_handle, VAddr wait_address) { - _dbg_assert_(Kernel, thread != nullptr); - return VerifyWait(thread, type, wait_handle) && (wait_address == thread->wait_address); +/// Check if a thread is blocking on a specified wait type with a specified handle +static bool CheckWaitType(const Thread* thread, WaitType type, Handle wait_handle) { + return CheckWaitType(thread, type) && (wait_handle == thread->wait_handle); +} + +/// Check if a thread is blocking on a specified wait type with a specified handle and address +static bool CheckWaitType(const Thread* thread, WaitType type, Handle wait_handle, VAddr wait_address) { + return CheckWaitType(thread, type, wait_handle) && (wait_address == thread->wait_address); } /// Stops the current thread @@ -171,9 +174,9 @@ ResultCode StopThread(Handle handle, const char* reason) { thread->status = THREADSTATUS_DORMANT; for (Handle waiting_handle : thread->waiting_threads) { Thread* waiting_thread = g_object_pool.Get(waiting_handle); - if (VerifyWait(waiting_thread, WAITTYPE_THREADEND, handle)) { + + if (CheckWaitType(waiting_thread, WAITTYPE_THREADEND, handle)) ResumeThreadFromWait(waiting_handle); - } } thread->waiting_threads.clear(); @@ -209,7 +212,7 @@ Handle ArbitrateHighestPriorityThread(u32 arbiter, u32 address) { for (Handle handle : thread_queue) { Thread* thread = g_object_pool.Get(handle); - if (!VerifyWait(thread, WAITTYPE_ARB, arbiter, address)) + if (!CheckWaitType(thread, WAITTYPE_ARB, arbiter, address)) continue; if (thread == nullptr) @@ -234,7 +237,7 @@ void ArbitrateAllThreads(u32 arbiter, u32 address) { for (Handle handle : thread_queue) { Thread* thread = g_object_pool.Get(handle); - if (VerifyWait(thread, WAITTYPE_ARB, arbiter, address)) + if (CheckWaitType(thread, WAITTYPE_ARB, arbiter, address)) ResumeThreadFromWait(handle); } } @@ -305,6 +308,8 @@ void ResumeThreadFromWait(Handle handle) { Thread* thread = Kernel::g_object_pool.Get(handle); if (thread) { thread->status &= ~THREADSTATUS_WAIT; + thread->wait_handle = 0; + thread->wait_type = WAITTYPE_NONE; if (!(thread->status & (THREADSTATUS_WAITSUSPEND | THREADSTATUS_DORMANT | THREADSTATUS_DEAD))) { ChangeReadyState(thread, true); } @@ -468,19 +473,27 @@ void Reschedule() { Thread* prev = GetCurrentThread(); Thread* next = NextThread(); HLE::g_reschedule = false; - if (next > 0) { + + if (next != nullptr) { LOG_TRACE(Kernel, "context switch 0x%08X -> 0x%08X", prev->GetHandle(), next->GetHandle()); - SwitchContext(next); + } else { + LOG_TRACE(Kernel, "cannot context switch from 0x%08X, no higher priority thread!", prev->GetHandle()); - // Hack - There is no mechanism yet to waken the primary thread if it has been put to sleep - // by a simulated VBLANK thread switch. So, we'll just immediately set it to "ready" again. - // This results in the current thread yielding on a VBLANK once, and then it will be - // immediately placed back in the queue for execution. - if (prev->wait_type == WAITTYPE_VBLANK) { - ResumeThreadFromWait(prev->GetHandle()); + for (Handle handle : thread_queue) { + Thread* thread = g_object_pool.Get(handle); + LOG_TRACE(Kernel, "\thandle=0x%08X prio=0x%02X, status=0x%08X wait_type=0x%08X wait_handle=0x%08X", + thread->GetHandle(), thread->current_priority, thread->status, thread->wait_type, thread->wait_handle); } } + + // TODO(bunnei): Hack - There is no timing mechanism yet to wake up a thread if it has been put + // to sleep. So, we'll just immediately set it to "ready" again after an attempted context + // switch has occurred. This results in the current thread yielding on a sleep once, and then it + // will immediately be placed back in the queue for execution. + + if (CheckWaitType(prev, WAITTYPE_SLEEP)) + ResumeThreadFromWait(prev->GetHandle()); } ResultCode GetThreadId(u32* thread_id, Handle handle) { diff --git a/src/core/hle/kernel/thread.h b/src/core/hle/kernel/thread.h index ec3b887d43..65e8ef5541 100644 --- a/src/core/hle/kernel/thread.h +++ b/src/core/hle/kernel/thread.h @@ -40,7 +40,6 @@ enum WaitType { WAITTYPE_SEMA, WAITTYPE_EVENT, WAITTYPE_THREADEND, - WAITTYPE_VBLANK, WAITTYPE_MUTEX, WAITTYPE_SYNCH, WAITTYPE_ARB, diff --git a/src/core/hle/svc.cpp b/src/core/hle/svc.cpp index 47e9bf77ed..70ef7839c2 100644 --- a/src/core/hle/svc.cpp +++ b/src/core/hle/svc.cpp @@ -352,7 +352,8 @@ static Result ClearEvent(Handle evt) { static void SleepThread(s64 nanoseconds) { LOG_TRACE(Kernel_SVC, "called nanoseconds=%lld", nanoseconds); - // Check for next thread to schedule + // Sleep current thread and check for next thread to schedule + Kernel::WaitCurrentThread(WAITTYPE_SLEEP); HLE::Reschedule(__func__); }