error_code sys_lwmutex_unlock(ppu_thread& ppu, vm::ptr<sys_lwmutex_t> lwmutex)
{
sysPrxForUser.trace("sys_lwmutex_unlock(lwmutex=*0x%x)", lwmutex);
if (g_cfg.core.hle_lwmutex)
{
return sys_mutex_unlock(ppu, lwmutex->sleep_queue);
}
const be_t<u32> tid(ppu.id);
// check owner
if (lwmutex->vars.owner.load() != tid)
{
return CELL_EPERM;
}
if (lwmutex->recursive_count)
{
// recursive unlocking succeeded
lwmutex->recursive_count--;
return CELL_OK;
}
// ensure that waiter is zero
if (lwmutex->lock_var.compare_and_swap_test({ tid, 0 }, { lwmutex_free, 0 }))
{
// unlocking succeeded
return CELL_OK;
}
if (lwmutex->attribute & SYS_SYNC_RETRY)
{
lwmutex->vars.owner.release(lwmutex_free);
// Call the alternative syscall
if (_sys_lwmutex_unlock2(lwmutex->sleep_queue) == CELL_ESRCH)
{
return CELL_ESRCH;
}
return CELL_OK;
}
// set special value
lwmutex->vars.owner.release(lwmutex_reserved);
// call the syscall
if (_sys_lwmutex_unlock(ppu, lwmutex->sleep_queue) == CELL_ESRCH)
{
return CELL_ESRCH;
}
return CELL_OK;
}
s32 sys_lwmutex_unlock(PPUThread& CPU, vm::ptr<sys_lwmutex_t> lwmutex)
{
sysPrxForUser.Log("sys_lwmutex_unlock(lwmutex=*0x%x)", lwmutex);
const be_t<u32> tid = be_t<u32>::make(CPU.GetId());
// check owner
if (lwmutex->owner.read_relaxed() != tid)
{
return CELL_EPERM;
}
if (lwmutex->recursive_count.data())
{
// recursive unlocking succeeded
lwmutex->recursive_count--;
return CELL_OK;
}
// ensure that waiter is zero
if (lwmutex->lock_var.compare_and_swap_test({ tid, lwmutex::zero }, { lwmutex::free, lwmutex::zero }))
{
// unlocking succeeded
return CELL_OK;
}
if (lwmutex->attribute.data() & se32(SYS_SYNC_RETRY))
{
// TODO (protocol is ignored in current implementation)
}
// set special value
lwmutex->owner.exchange(lwmutex::reserved);
// call the syscall
if (_sys_lwmutex_unlock(lwmutex->sleep_queue) == CELL_ESRCH)
{
return CELL_ESRCH;
}
return CELL_OK;
}
