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core_timing,scheduler: Use std::scoped_lock when possible

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Simplifies the cognitive load of procedures using locks and makes locks
safe against exceptions.
This commit is contained in:
ReinUsesLisp 2020-06-28 21:42:57 -03:00
parent b05795d704
commit 8562b516c0
2 changed files with 12 additions and 15 deletions
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21
src/core/hle/kernel/scheduler.cpp
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@ -6,6 +6,7 @@
// licensed under GPLv2 or later under exception provided by the author.
#include <algorithm>
#include <mutex>
#include <set>
#include <unordered_set>
#include <utility>
@ -31,22 +32,20 @@ GlobalScheduler::GlobalScheduler(KernelCore& kernel) : kernel{kernel} {}
GlobalScheduler::~GlobalScheduler() = default;
void GlobalScheduler::AddThread(std::shared_ptr<Thread> thread) {
global_list_guard.lock();
std::scoped_lock lock{global_list_guard};
thread_list.push_back(std::move(thread));
global_list_guard.unlock();
}
void GlobalScheduler::RemoveThread(std::shared_ptr<Thread> thread) {
global_list_guard.lock();
std::scoped_lock lock{global_list_guard};
thread_list.erase(std::remove(thread_list.begin(), thread_list.end(), thread),
thread_list.end());
global_list_guard.unlock();
}
u32 GlobalScheduler::SelectThreads() {
ASSERT(is_locked);
const auto update_thread = [](Thread* thread, Scheduler& sched) {
sched.guard.lock();
std::scoped_lock lock{sched.guard};
if (thread != sched.selected_thread_set.get()) {
if (thread == nullptr) {
++sched.idle_selection_count;
@ -57,7 +56,6 @@ u32 GlobalScheduler::SelectThreads() {
sched.is_context_switch_pending || (sched.selected_thread_set != sched.current_thread);
sched.is_context_switch_pending = reschedule_pending;
std::atomic_thread_fence(std::memory_order_seq_cst);
sched.guard.unlock();
return reschedule_pending;
};
if (!is_reselection_pending.load()) {
@ -757,11 +755,12 @@ void Scheduler::OnSwitch(void* this_scheduler) {
void Scheduler::SwitchToCurrent() {
while (true) {
guard.lock();
selected_thread = selected_thread_set;
current_thread = selected_thread;
is_context_switch_pending = false;
guard.unlock();
{
std::scoped_lock lock{guard};
selected_thread = selected_thread_set;
current_thread = selected_thread;
is_context_switch_pending = false;
}
while (!is_context_switch_pending) {
if (current_thread != nullptr && !current_thread->IsHLEThread()) {
current_thread->context_guard.lock();