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Fix deadlocks by enabling reuse of exited threads (#855)
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Browse source 
Simplify loop

const correctness

Simplify setting is_free

Co-authored-by: Adam Jones <a.c.jones@outlook.com>
This commit is contained in:
adjonesey 2024-09-09 21:13:28 +01:00 committed by GitHub
parent f23c6dc852
commit dcab06ff2b
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GPG key ID: B5690EEEBB952194
2 changed files with 9 additions and 6 deletions
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13
src/core/libraries/kernel/thread_management.cpp
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@ -54,11 +54,12 @@ void init_pthreads() {
}
void pthreadInitSelfMainThread() {
const char* name = "Main_Thread";
auto* pthread_pool = g_pthread_cxt->GetPthreadPool();
g_pthread_self = pthread_pool->Create();
g_pthread_self = pthread_pool->Create(name);
scePthreadAttrInit(&g_pthread_self->attr);
g_pthread_self->pth = pthread_self();
g_pthread_self->name = "Main_Thread";
g_pthread_self->name = name;
}
int PS4_SYSV_ABI scePthreadAttrInit(ScePthreadAttr* attr) {
@ -1016,7 +1017,7 @@ int PS4_SYSV_ABI scePthreadCreate(ScePthread* thread, const ScePthreadAttr* attr
attr = g_pthread_cxt->GetDefaultAttr();
}
*thread = pthread_pool->Create();
*thread = pthread_pool->Create(name);
if ((*thread)->attr != nullptr) {
scePthreadAttrDestroy(&(*thread)->attr);
@ -1058,11 +1059,11 @@ int PS4_SYSV_ABI scePthreadCreate(ScePthread* thread, const ScePthreadAttr* attr
}
}
ScePthread PThreadPool::Create() {
ScePthread PThreadPool::Create(const char* name) {
std::scoped_lock lock{m_mutex};
for (auto* p : m_threads) {
if (p->is_free) {
if (p->is_free && p->name == name) {
p->is_free = false;
return p;
}
@ -1491,6 +1492,8 @@ int PS4_SYSV_ABI scePthreadOnce(int* once_control, void (*init_routine)(void)) {
}
[[noreturn]] void PS4_SYSV_ABI scePthreadExit(void* value_ptr) {
g_pthread_self->is_free = true;
pthread_exit(value_ptr);
UNREACHABLE();
}

2
src/core/libraries/kernel/thread_management.h
View file

@ -119,7 +119,7 @@ struct PthreadSemInternal {
class PThreadPool {
public:
ScePthread Create();
ScePthread Create(const char* name);
private:
std::vector<ScePthread> m_threads;