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WaitSynch: Removed unused variables and reduced SharedPtr copies. 

Define a variable with the value of the sync timeout error code.

Use a boost::flat_map instead of an unordered_map to hold the equivalence of objects and wait indices in a WaitSynchN call.
This commit is contained in:
Subv 2016-12-08 10:34:53 -05:00
parent 7cde5b83bc
commit 17b29d8865
5 changed files with 63 additions and 80 deletions
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2
src/citra_qt/debugger/wait_tree.cpp
View File

@ -230,7 +230,7 @@ std::vector<std::unique_ptr<WaitTreeItem>> WaitTreeThread::GetChildren() const {
list.push_back(std::make_unique<WaitTreeMutexList>(thread.held_mutexes));
}
if (thread.status == THREADSTATUS_WAIT_SYNCH) {
list.push_back(std::make_unique<WaitTreeObjectList>(thread.wait_objects, thread.IsWaitingAll()));
list.push_back(std::make_unique<WaitTreeObjectList>(thread.wait_objects, thread.IsSleepingOnWaitAll()));
}
return list;

14
src/core/hle/kernel/kernel.cpp
View File

@ -34,14 +34,11 @@ void WaitObject::RemoveWaitingThread(Thread* thread) {
SharedPtr<Thread> WaitObject::GetHighestPriorityReadyThread() {
// Remove the threads that are ready or already running from our waitlist
boost::range::remove_erase_if(waiting_threads, [](const SharedPtr<Thread>& thread) -> bool {
boost::range::remove_erase_if(waiting_threads, [](const SharedPtr<Thread>& thread) {
return thread->status == THREADSTATUS_RUNNING || thread->status == THREADSTATUS_READY;
});
if (waiting_threads.empty())
return nullptr;
SharedPtr<Thread> candidate = nullptr;
Thread* candidate = nullptr;
s32 candidate_priority = THREADPRIO_LOWEST + 1;
for (const auto& thread : waiting_threads) {
@ -52,7 +49,7 @@ SharedPtr<Thread> WaitObject::GetHighestPriorityReadyThread() {
return object->ShouldWait();
});
if (ready_to_run) {
candidate = thread;
candidate = thread.get();
candidate_priority = thread->current_priority;
}
}
@ -61,9 +58,8 @@ SharedPtr<Thread> WaitObject::GetHighestPriorityReadyThread() {
}
void WaitObject::WakeupAllWaitingThreads() {
// Wake up all threads that can be awoken, in priority order
while (auto thread = GetHighestPriorityReadyThread()) {
if (thread->wait_objects.empty()) {
if (!thread->IsSleepingOnWaitAll()) {
Acquire();
// Set the output index of the WaitSynchronizationN call to the index of this object.
if (thread->wait_set_output) {
@ -73,7 +69,6 @@ void WaitObject::WakeupAllWaitingThreads() {
} else {
for (auto object : thread->wait_objects) {
object->Acquire();
// Remove the thread from the object's waitlist
object->RemoveWaitingThread(thread.get());
}
// Note: This case doesn't update the output index of WaitSynchronizationN.
@ -81,7 +76,6 @@ void WaitObject::WakeupAllWaitingThreads() {
thread->wait_objects.clear();
}
// Set the result of the call to WaitSynchronization to RESULT_SUCCESS
thread->SetWaitSynchronizationResult(RESULT_SUCCESS);
thread->ResumeFromWait();
// Note: Removing the thread from the object's waitlist will be done by GetHighestPriorityReadyThread

5
src/core/hle/kernel/kernel.h
View File

@ -152,7 +152,10 @@ public:
*/
void RemoveWaitingThread(Thread* thread);
/// Wake up all threads waiting on this object
/**
* Wake up all threads waiting on this object that can be awoken, in priority order,
* and set the synchronization result and output of the thread.
*/
void WakeupAllWaitingThreads();
/// Obtains the highest priority thread that is ready to run from this object's waiting list.

5
src/core/hle/kernel/thread.h
View File

@ -7,6 +7,7 @@
#include <string>
#include <unordered_map>
#include <vector>
#include <boost/container/flat_map.hpp>
#include <boost/container/flat_set.hpp>
#include "common/common_types.h"
#include "core/core.h"
@ -153,7 +154,7 @@ public:
* its wait list to become ready, as a result of a WaitSynchronizationN call
* with wait_all = true, or a ReplyAndReceive call.
*/
bool IsWaitingAll() const {
bool IsSleepingOnWaitAll() const {
return !wait_objects.empty();
}
@ -183,7 +184,7 @@ public:
/// This is only populated when the thread should wait for all the objects to become ready.
std::vector<SharedPtr<WaitObject>> wait_objects;
std::unordered_map<int, s32> wait_objects_index; ///< Mapping of Object ids to their position in the last waitlist that this object waited on.
boost::container::flat_map<int, s32> wait_objects_index; ///< Mapping of Object ids to their position in the last waitlist that this object waited on.
VAddr wait_address; ///< If waiting on an AddressArbiter, this is the arbitration address

117
src/core/hle/svc.cpp
View File

@ -41,6 +41,9 @@ const ResultCode ERR_PORT_NAME_TOO_LONG(ErrorDescription(30), ErrorModule::OS,
ErrorSummary::InvalidArgument,
ErrorLevel::Usage); // 0xE0E0181E
const ResultCode ERR_SYNC_TIMEOUT(ErrorDescription::Timeout, ErrorModule::OS,
ErrorSummary::StatusChanged, ErrorLevel::Info);
const ResultCode ERR_MISALIGNED_ADDRESS{// 0xE0E01BF1
ErrorDescription::MisalignedAddress, ErrorModule::OS,
ErrorSummary::InvalidArgument, ErrorLevel::Usage};
@ -257,11 +260,8 @@ static ResultCode WaitSynchronization1(Handle handle, s64 nano_seconds) {
if (object->ShouldWait()) {
if (nano_seconds == 0) {
return ResultCode(ErrorDescription::Timeout, ErrorModule::OS,
ErrorSummary::StatusChanged,
ErrorLevel::Info);
}
if (nano_seconds == 0)
return ERR_SYNC_TIMEOUT;
object->AddWaitingThread(thread);
// TODO(Subv): Perform things like update the mutex lock owner's priority to prevent priority inversion.
@ -273,9 +273,7 @@ static ResultCode WaitSynchronization1(Handle handle, s64 nano_seconds) {
// Note: The output of this SVC will be set to RESULT_SUCCESS if the thread resumes due to a signal in its wait objects.
// Otherwise we retain the default value of timeout.
return ResultCode(ErrorDescription::Timeout, ErrorModule::OS,
ErrorSummary::StatusChanged,
ErrorLevel::Info);
return ERR_SYNC_TIMEOUT;
}
object->Acquire();
@ -286,8 +284,6 @@ static ResultCode WaitSynchronization1(Handle handle, s64 nano_seconds) {
/// Wait for the given handles to synchronize, timeout after the specified nanoseconds
static ResultCode WaitSynchronizationN(s32* out, Handle* handles, s32 handle_count, bool wait_all,
s64 nano_seconds) {
bool wait_thread = !wait_all;
int handle_index = 0;
Kernel::Thread* thread = Kernel::GetCurrentThread();
// Check if 'handles' is invalid
@ -305,7 +301,6 @@ static ResultCode WaitSynchronizationN(s32* out, Handle* handles, s32 handle_cou
ErrorSummary::InvalidArgument, ErrorLevel::Usage);
using ObjectPtr = Kernel::SharedPtr<Kernel::WaitObject>;
std::vector<ObjectPtr> objects(handle_count);
for (int i = 0; i < handle_count; ++i) {
@ -320,15 +315,53 @@ static ResultCode WaitSynchronizationN(s32* out, Handle* handles, s32 handle_cou
// It will be repopulated later in the wait_all = false case.
thread->wait_objects_index.clear();
if (!wait_all) {
// Find the first object that is acquireable in the provided list of objects
if (wait_all) {
bool all_available = std::all_of(objects.begin(), objects.end(), [](const ObjectPtr& object) {
return !object->ShouldWait();
});
if (all_available) {
// We can acquire all objects right now, do so.
for (auto object : objects)
object->Acquire();
// Note: In this case, the `out` parameter is not set, and retains whatever value it had before.
return RESULT_SUCCESS;
}
// Not all objects were available right now, prepare to suspend the thread.
// If a timeout value of 0 was provided, just return the Timeout error code instead of suspending the thread.
if (nano_seconds == 0)
return ERR_SYNC_TIMEOUT;
// Put the thread to sleep
thread->status = THREADSTATUS_WAIT_SYNCH;
// Add the thread to each of the objects' waiting threads.
for (auto& object : objects) {
object->AddWaitingThread(thread);
// TODO(Subv): Perform things like update the mutex lock owner's priority to prevent priority inversion.
// Currently this is done in Mutex::ShouldWait, but it should be moved to a function that is called from here.
}
// Set the thread's waitlist to the list of objects passed to WaitSynchronizationN
thread->wait_objects = std::move(objects);
// Create an event to wake the thread up after the specified nanosecond delay has passed
thread->WakeAfterDelay(nano_seconds);
// This value gets set to -1 by default in this case, it is not modified after this.
*out = -1;
// Note: The output of this SVC will be set to RESULT_SUCCESS if the thread resumes due to a signal in one of its wait objects.
return ERR_SYNC_TIMEOUT;
} else {
// Find the first object that is acquirable in the provided list of objects
auto itr = std::find_if(objects.begin(), objects.end(), [](const ObjectPtr& object) {
return !object->ShouldWait();
});
if (itr != objects.end()) {
// We found a ready object, acquire it and set the result value
ObjectPtr object = *itr;
Kernel::WaitObject* object = itr->get();
object->Acquire();
*out = std::distance(objects.begin(), itr);
return RESULT_SUCCESS;
@ -337,11 +370,8 @@ static ResultCode WaitSynchronizationN(s32* out, Handle* handles, s32 handle_cou
// No objects were ready to be acquired, prepare to suspend the thread.
// If a timeout value of 0 was provided, just return the Timeout error code instead of suspending the thread.
if (nano_seconds == 0) {
return ResultCode(ErrorDescription::Timeout, ErrorModule::OS,
ErrorSummary::StatusChanged,
ErrorLevel::Info);
}
if (nano_seconds == 0)
return ERR_SYNC_TIMEOUT;
// Put the thread to sleep
thread->status = THREADSTATUS_WAIT_SYNCH;
@ -351,7 +381,7 @@ static ResultCode WaitSynchronizationN(s32* out, Handle* handles, s32 handle_cou
// Add the thread to each of the objects' waiting threads.
for (size_t i = 0; i < objects.size(); ++i) {
ObjectPtr object = objects[i];
Kernel::WaitObject* object = objects[i].get();
// Set the index of this object in the mapping of Objects -> index for this thread.
thread->wait_objects_index[object->GetObjectId()] = static_cast<int>(i);
object->AddWaitingThread(thread);
@ -368,52 +398,7 @@ static ResultCode WaitSynchronizationN(s32* out, Handle* handles, s32 handle_cou
// Otherwise we retain the default value of timeout, and -1 in the out parameter
thread->wait_set_output = true;
*out = -1;
return ResultCode(ErrorDescription::Timeout, ErrorModule::OS,
ErrorSummary::StatusChanged,
ErrorLevel::Info);
} else {
bool all_available = std::all_of(objects.begin(), objects.end(), [](const ObjectPtr& object) {
return !object->ShouldWait();
});
if (all_available) {
// We can acquire all objects right now, do so.
for (auto object : objects)
object->Acquire();
// Note: In this case, the `out` parameter is not set, and retains whatever value it had before.
return RESULT_SUCCESS;
}
// Not all objects were available right now, prepare to suspend the thread.
// If a timeout value of 0 was provided, just return the Timeout error code instead of suspending the thread.
if (nano_seconds == 0) {
return ResultCode(ErrorDescription::Timeout, ErrorModule::OS,
ErrorSummary::StatusChanged,
ErrorLevel::Info);
}
// Put the thread to sleep
thread->status = THREADSTATUS_WAIT_SYNCH;
// Set the thread's waitlist to the list of objects passed to WaitSynchronizationN
thread->wait_objects = objects;
// Add the thread to each of the objects' waiting threads.
for (auto object : objects) {
object->AddWaitingThread(thread);
// TODO(Subv): Perform things like update the mutex lock owner's priority to prevent priority inversion.
// Currently this is done in Mutex::ShouldWait, but it should be moved to a function that is called from here.
}
// Create an event to wake the thread up after the specified nanosecond delay has passed
thread->WakeAfterDelay(nano_seconds);
// This value gets set to -1 by default in this case, it is not modified after this.
*out = -1;
// Note: The output of this SVC will be set to RESULT_SUCCESS if the thread resumes due to a signal in one of its wait objects.
return ResultCode(ErrorDescription::Timeout, ErrorModule::OS,
ErrorSummary::StatusChanged,
ErrorLevel::Info);
return ERR_SYNC_TIMEOUT;
}
}