RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 20:57:35 +00:00
Code Issues Activity Actions

Kernel: Protect PTYMultiplexer freelist with spinlock instead of mutex

Browse source
This commit is contained in:
Andreas Kling 2022-02-03 01:28:14 +01:00
parent 6fbb924bbf
commit 0899153170
2 changed files with 4 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

6
Kernel/TTY/PTYMultiplexer.cpp
View file

@ -24,7 +24,7 @@ PTYMultiplexer& PTYMultiplexer::the()
UNMAP_AFTER_INIT PTYMultiplexer::PTYMultiplexer()
: CharacterDevice(5, 2)
{
m_freelist.with_exclusive([&](auto& freelist) {
m_freelist.with([&](auto& freelist) {
freelist.ensure_capacity(max_pty_pairs);
for (int i = max_pty_pairs; i > 0; --i)
freelist.unchecked_append(i - 1);
@ -42,7 +42,7 @@ UNMAP_AFTER_INIT void PTYMultiplexer::initialize()
ErrorOr<NonnullRefPtr<OpenFileDescription>> PTYMultiplexer::open(int options)
{
return m_freelist.with_exclusive([&](auto& freelist) -> ErrorOr<NonnullRefPtr<OpenFileDescription>> {
return m_freelist.with([&](auto& freelist) -> ErrorOr<NonnullRefPtr<OpenFileDescription>> {
if (freelist.is_empty())
return EBUSY;
@ -58,7 +58,7 @@ ErrorOr<NonnullRefPtr<OpenFileDescription>> PTYMultiplexer::open(int options)
void PTYMultiplexer::notify_master_destroyed(Badge<MasterPTY>, unsigned index)
{
m_freelist.with_exclusive([&](auto& freelist) {
m_freelist.with([&](auto& freelist) {
freelist.append(index);
dbgln_if(PTMX_DEBUG, "PTYMultiplexer: {} added to freelist", index);
});