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bsd: Fix eventfd broken logic (#3647)

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* bsd: Fix eventfd broken logic

This commit fix eventfd logic being broken.

The following changes were made:
- EventFd IPC definition had argument inverted
- EventFd events weren't fired correctly
- Poll logic was wrong and unfinished for eventfd
- Reintroduce workaround from #3385 but in a safer way, and spawn 4
  threads.

* ipc: Rework a bit for multithreads

* Clean up debug logs

* Make server thread yield when managed lock isn't availaible

* Fix replyTargetHandle not being added in the proper locking scope

* Simplify some scopes

* Address gdkchan's comments

* Revert IPC workaround for now

* Reintroduce the EventFileDescriptor workaround
This commit is contained in:
Mary-nyan 2022-11-27 21:18:05 +01:00 • committed by GitHub
parent 18b61aff59
commit 1865ea87e5
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
3 changed files with 60 additions and 17 deletions
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40
Ryujinx.HLE/HOS/Services/Sockets/Bsd/Impl/EventFileDescriptor.cs
View file

@ -26,8 +26,9 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd
_value = value;
_flags = flags;
WriteEvent = new ManualResetEvent(true);
ReadEvent = new ManualResetEvent(true);
WriteEvent = new ManualResetEvent(false);
ReadEvent = new ManualResetEvent(false);
UpdateEventStates();
}
public int Refcount { get; set; }
@ -38,6 +39,25 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd
ReadEvent.Dispose();
}
private void ResetEventStates()
{
WriteEvent.Reset();
ReadEvent.Reset();
}
private void UpdateEventStates()
{
if (_value > 0)
{
ReadEvent.Set();
}
if (_value != uint.MaxValue - 1)
{
WriteEvent.Set();
}
}
public LinuxError Read(out int readSize, Span<byte> buffer)
{
if (buffer.Length < sizeof(ulong))
@ -47,10 +67,10 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd
return LinuxError.EINVAL;
}
ReadEvent.Reset();
lock (_lock)
{
ResetEventStates();
ref ulong count = ref MemoryMarshal.Cast<byte, ulong>(buffer)[0];
if (_value == 0)
@ -66,6 +86,7 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd
{
readSize = 0;
UpdateEventStates();
return LinuxError.EAGAIN;
}
}
@ -85,8 +106,7 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd
_value = 0;
}
ReadEvent.Set();
UpdateEventStates();
return LinuxError.SUCCESS;
}
}
@ -100,10 +120,10 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd
return LinuxError.EINVAL;
}
WriteEvent.Reset();
lock (_lock)
{
ResetEventStates();
if (_value > _value + count)
{
if (Blocking)
@ -114,6 +134,7 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd
{
writeSize = 0;
UpdateEventStates();
return LinuxError.EAGAIN;
}
}
@ -123,8 +144,7 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd
_value += count;
Monitor.Pulse(_lock);
WriteEvent.Set();
UpdateEventStates();
return LinuxError.SUCCESS;
}
}