Ryujinx/ARMeilleure/Signal/UnixSignalHandlerRegistration.cs
Mary 00c69f2098
Remove usage of Mono.Posix.NETStandard accross all projects (#2906)
* Remove usage of Mono.Posix.NETStandard in Ryujinx project

* Remove usage of Mono.Posix.NETStandard in ARMeilleure project

* Remove usage of Mono.Posix.NETStandard in Ryujinx.Memory project

* Address gdkchan's comments
2021-12-08 18:24:26 -03:00

57 lines
1.5 KiB
C#

using System;
using System.Runtime.InteropServices;
namespace ARMeilleure.Signal
{
[StructLayout(LayoutKind.Sequential, Pack = 1)]
unsafe struct SigSet
{
fixed long sa_mask[16];
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct SigAction
{
public IntPtr sa_handler;
public SigSet sa_mask;
public int sa_flags;
public IntPtr sa_restorer;
}
static class UnixSignalHandlerRegistration
{
private const int SIGSEGV = 11;
private const int SA_SIGINFO = 0x00000004;
[DllImport("libc", SetLastError = true)]
private static extern int sigaction(int signum, ref SigAction sigAction, out SigAction oldAction);
[DllImport("libc", SetLastError = true)]
private static extern int sigemptyset(ref SigSet set);
public static SigAction RegisterExceptionHandler(IntPtr action)
{
SigAction sig = new SigAction
{
sa_handler = action,
sa_flags = SA_SIGINFO
};
sigemptyset(ref sig.sa_mask);
int result = sigaction(SIGSEGV, ref sig, out SigAction old);
if (result != 0)
{
throw new InvalidOperationException($"Could not register sigaction. Error: {result}");
}
return old;
}
public static bool RestoreExceptionHandler(SigAction oldAction)
{
return sigaction(SIGSEGV, ref oldAction, out SigAction _) == 0;
}
}
}