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Improve vm::reservation_update

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Only respect unique lock.
This commit is contained in:
Nekotekina 2020-10-11 17:18:40 +03:00
parent 2f329cf7b5
commit 1885e4345c
4 changed files with 19 additions and 18 deletions
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16
rpcs3/Emu/Memory/vm.cpp
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@ -80,15 +80,25 @@ namespace vm
// Memory pages
std::array<memory_page, 0x100000000 / 4096> g_pages{};
void reservation_update(u32 addr, u32 size, bool lsb)
std::pair<bool, u64> try_reservation_update(u32 addr)
{
// Update reservation info with new timestamp
auto& res = reservation_acquire(addr, 1);
const u64 rtime = res;
return {!(rtime & vm::rsrv_unique_lock) && res.compare_and_swap_test(rtime, rtime + 128), rtime};
}
void reservation_update(u32 addr)
{
u64 old = UINT64_MAX;
const auto cpu = get_current_cpu_thread();
while (true)
{
const auto [ok, rtime] = try_reservation_update(addr, size, lsb);
if (ok || old / 128 < rtime / 128)
const auto [ok, rtime] = try_reservation_update(addr);
if (ok || (old & -128) < (rtime & -128))
{
return;
}