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authorbunnei <bunneidev@gmail.com>2015-01-08 02:45:05 +0100
committerbunnei <bunneidev@gmail.com>2015-01-08 02:45:05 +0100
commit91d96840ea698edaf5f2b6e8522d18f00bb18d9c (patch)
treee9e6288406b16f2a8dd10236c96567a895af3410 /src/core/hle/kernel
parentMerge pull request #404 from bunnei/more-frame-synch-fixes (diff)
parentThreads: Use a dummy idle thread when no other are ready. (diff)
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Diffstat (limited to 'src/core/hle/kernel')
-rw-r--r--src/core/hle/kernel/kernel.cpp2
-rw-r--r--src/core/hle/kernel/thread.cpp23
-rw-r--r--src/core/hle/kernel/thread.h11
3 files changed, 35 insertions, 1 deletions
diff --git a/src/core/hle/kernel/kernel.cpp b/src/core/hle/kernel/kernel.cpp
index e59ed1b57..ae2c11a1c 100644
--- a/src/core/hle/kernel/kernel.cpp
+++ b/src/core/hle/kernel/kernel.cpp
@@ -124,6 +124,8 @@ bool LoadExec(u32 entry_point) {
// 0x30 is the typical main thread priority I've seen used so far
g_main_thread = Kernel::SetupMainThread(0x30);
+ // Setup the idle thread
+ Kernel::SetupIdleThread();
return true;
}
diff --git a/src/core/hle/kernel/thread.cpp b/src/core/hle/kernel/thread.cpp
index d76451146..58fb62e89 100644
--- a/src/core/hle/kernel/thread.cpp
+++ b/src/core/hle/kernel/thread.cpp
@@ -11,6 +11,7 @@
#include "common/thread_queue_list.h"
#include "core/core.h"
+#include "core/core_timing.h"
#include "core/hle/hle.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/thread.h"
@@ -34,6 +35,7 @@ public:
inline bool IsReady() const { return (status & THREADSTATUS_READY) != 0; }
inline bool IsWaiting() const { return (status & THREADSTATUS_WAIT) != 0; }
inline bool IsSuspended() const { return (status & THREADSTATUS_SUSPEND) != 0; }
+ inline bool IsIdle() const { return idle; }
ResultVal<bool> WaitSynchronization() override {
const bool wait = status != THREADSTATUS_DORMANT;
@@ -69,6 +71,9 @@ public:
std::vector<Handle> waiting_threads;
std::string name;
+
+ /// Whether this thread is intended to never actually be executed, i.e. always idle
+ bool idle = false;
};
// Lists all thread ids that aren't deleted/etc.
@@ -444,7 +449,14 @@ ResultCode SetThreadPriority(Handle handle, s32 priority) {
return RESULT_SUCCESS;
}
-/// Sets up the primary application thread
+Handle SetupIdleThread() {
+ Handle handle;
+ Thread* thread = CreateThread(handle, "idle", 0, THREADPRIO_LOWEST, THREADPROCESSORID_0, 0, 0);
+ thread->idle = true;
+ CallThread(thread);
+ return handle;
+}
+
Handle SetupMainThread(s32 priority, int stack_size) {
Handle handle;
@@ -497,6 +509,15 @@ void Reschedule() {
ResumeThreadFromWait(prev->GetHandle());
}
+bool IsIdleThread(Handle handle) {
+ Thread* thread = g_handle_table.Get<Thread>(handle);
+ if (!thread) {
+ LOG_ERROR(Kernel, "Thread not found %u", handle);
+ return false;
+ }
+ return thread->IsIdle();
+}
+
ResultCode GetThreadId(u32* thread_id, Handle handle) {
Thread* thread = g_handle_table.Get<Thread>(handle);
if (thread == nullptr)
diff --git a/src/core/hle/kernel/thread.h b/src/core/hle/kernel/thread.h
index 0e1397cd9..dfe92d162 100644
--- a/src/core/hle/kernel/thread.h
+++ b/src/core/hle/kernel/thread.h
@@ -104,6 +104,17 @@ ResultVal<u32> GetThreadPriority(const Handle handle);
/// Set the priority of the thread specified by handle
ResultCode SetThreadPriority(Handle handle, s32 priority);
+/**
+ * Sets up the idle thread, this is a thread that is intended to never execute instructions,
+ * only to advance the timing. It is scheduled when there are no other ready threads in the thread queue
+ * and will try to yield on every call.
+ * @returns The handle of the idle thread
+ */
+Handle SetupIdleThread();
+
+/// Whether the current thread is an idle thread
+bool IsIdleThread(Handle thread);
+
/// Initialize threading
void ThreadingInit();