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kern/util: use custom atomics wrapper to substantially improve codegen

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This commit is contained in:
Michael Scire 2021-10-19 15:24:15 -07:00
parent 52332e8d75
commit d74f364107
26 changed files with 688 additions and 260 deletions
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16
libraries/libmesosphere/source/kern_k_process.cpp
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@ -25,8 +25,8 @@ namespace ams::kern {
constexpr u64 ProcessIdMin = InitialProcessIdMax + 1;
constexpr u64 ProcessIdMax = std::numeric_limits<u64>::max();
std::atomic<u64> g_initial_process_id = InitialProcessIdMin;
std::atomic<u64> g_process_id = ProcessIdMin;
constinit util::Atomic<u64> g_initial_process_id{InitialProcessIdMin};
constinit util::Atomic<u64> g_process_id{ProcessIdMin};
Result TerminateChildren(KProcess *process, const KThread *thread_to_not_terminate) {
/* Request that all children threads terminate. */
@ -299,7 +299,7 @@ namespace ams::kern {
R_TRY(m_capabilities.Initialize(caps, num_caps, std::addressof(m_page_table)));
/* Initialize the process id. */
m_process_id = g_initial_process_id++;
m_process_id = g_initial_process_id.FetchAdd(1);
MESOSPHERE_ABORT_UNLESS(InitialProcessIdMin <= m_process_id);
MESOSPHERE_ABORT_UNLESS(m_process_id <= InitialProcessIdMax);
@ -409,7 +409,7 @@ namespace ams::kern {
R_TRY(m_capabilities.Initialize(user_caps, num_caps, std::addressof(m_page_table)));
/* Initialize the process id. */
m_process_id = g_process_id++;
m_process_id = g_process_id.FetchAdd(1);
MESOSPHERE_ABORT_UNLESS(ProcessIdMin <= m_process_id);
MESOSPHERE_ABORT_UNLESS(m_process_id <= ProcessIdMax);
@ -789,15 +789,15 @@ namespace ams::kern {
}
void KProcess::IncrementRunningThreadCount() {
MESOSPHERE_ASSERT(m_num_running_threads.load() >= 0);
MESOSPHERE_ASSERT(m_num_running_threads.Load() >= 0);
m_num_running_threads.fetch_add(1);
m_num_running_threads.FetchAdd(1);
}
void KProcess::DecrementRunningThreadCount() {
MESOSPHERE_ASSERT(m_num_running_threads.load() > 0);
MESOSPHERE_ASSERT(m_num_running_threads.Load() > 0);
if (m_num_running_threads.fetch_sub(1) == 1) {
if (m_num_running_threads.FetchSub(1) == 1) {
this->Terminate();
}
}