From 8562b516c0e3fa25a65e440db29cd474c0cbb896 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Sun, 28 Jun 2020 21:42:57 -0300
Subject: [PATCH] core_timing,scheduler: Use std::scoped_lock when possible
Simplifies the cognitive load of procedures using locks and makes locks
safe against exceptions.
---
src/core/core_timing.cpp | 6 ++----
src/core/hle/kernel/scheduler.cpp | 21 ++++++++++-----------
2 files changed, 12 insertions(+), 15 deletions(-)
diff --git a/src/core/core_timing.cpp b/src/core/core_timing.cpp
index 5c83c41a40..a63e604610 100644
--- a/src/core/core_timing.cpp
+++ b/src/core/core_timing.cpp
@@ -172,7 +172,7 @@ void CoreTiming::ClearPendingEvents() {
}
void CoreTiming::RemoveEvent(const std::shared_ptr<EventType>& event_type) {
- basic_lock.lock();
+ std::scoped_lock lock{basic_lock};
const auto itr = std::remove_if(event_queue.begin(), event_queue.end(), [&](const Event& e) {
return e.type.lock().get() == event_type.get();
@@ -183,12 +183,10 @@ void CoreTiming::RemoveEvent(const std::shared_ptr<EventType>& event_type) {
event_queue.erase(itr, event_queue.end());
std::make_heap(event_queue.begin(), event_queue.end(), std::greater<>());
}
- basic_lock.unlock();
}
std::optional<s64> CoreTiming::Advance() {
- std::scoped_lock advance_scope{advance_lock};
- std::scoped_lock basic_scope{basic_lock};
+ std::scoped_lock lock{advance_lock, basic_lock};
global_timer = GetGlobalTimeNs().count();
while (!event_queue.empty() && event_queue.front().time <= global_timer) {
diff --git a/src/core/hle/kernel/scheduler.cpp b/src/core/hle/kernel/scheduler.cpp
index 2b12c0dbf4..7b929781c8 100644
--- a/src/core/hle/kernel/scheduler.cpp
+++ b/src/core/hle/kernel/scheduler.cpp
@@ -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();
--
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