public void Seal()
{
/* Cothreads can very easily acquire "pointer poison"; because their stack and even registers
* are part of state, any poisoned pointer that's used even temporarily might be persisted longer
* than needed. Most of the libsnes core cothreads handle internal matters only and aren't very
* vulnerable to pointer poison, but the main boss cothread is used heavily during init, when
* many syscalls happen and many kinds of poison can end up on the stack. so here, we call
* _core.DllInit() again, which recreates that cothread, zeroing out all of the memory first,
* as well as zeroing out the comm struct. */
_core.DllInit();
_exe.Seal();
_sealed = true;
}
public GPGX(CoreComm comm, byte[] rom, IEnumerable <Disc> cds, object settings, object syncSettings)
{
ServiceProvider = new BasicServiceProvider(this);
// this can influence some things internally (autodetect romtype, etc)
string romextension = "GEN";
// three or six button?
// http://www.sega-16.com/forum/showthread.php?4398-Forgotten-Worlds-giving-you-GAME-OVER-immediately-Fix-inside&highlight=forgotten%20worlds
//hack, don't use
if (rom != null && rom.Length > 32 * 1024 * 1024)
{
throw new InvalidOperationException("ROM too big! Did you try to load a CD as a ROM?");
}
_elf = new PeRunner(new PeRunnerOptions
{
Path = comm.CoreFileProvider.DllPath(),
Filename = "gpgx.wbx",
SbrkHeapSizeKB = 512,
SealedHeapSizeKB = 36 * 1024,
InvisibleHeapSizeKB = 4 * 1024,
PlainHeapSizeKB = 64,
MmapHeapSizeKB = 1 * 1024
});
using (_elf.EnterExit())
{
Core = BizInvoker.GetInvoker <LibGPGX>(_elf, _elf, CallingConventionAdapters.Waterbox);
_syncSettings = (GPGXSyncSettings)syncSettings ?? new GPGXSyncSettings();
_settings = (GPGXSettings)settings ?? new GPGXSettings();
CoreComm = comm;
LoadCallback = new LibGPGX.load_archive_cb(load_archive);
_romfile = rom;
if (cds != null)
{
_cds = cds.ToArray();
_cdReaders = cds.Select(c => new DiscSectorReader(c)).ToArray();
cd_callback_handle = new LibGPGX.cd_read_cb(CDRead);
Core.gpgx_set_cdd_callback(cd_callback_handle);
DriveLightEnabled = true;
}
LibGPGX.INPUT_SYSTEM system_a = LibGPGX.INPUT_SYSTEM.SYSTEM_NONE;
LibGPGX.INPUT_SYSTEM system_b = LibGPGX.INPUT_SYSTEM.SYSTEM_NONE;
switch (_syncSettings.ControlType)
{
case ControlType.None:
default:
break;
case ControlType.Activator:
system_a = LibGPGX.INPUT_SYSTEM.SYSTEM_ACTIVATOR;
system_b = LibGPGX.INPUT_SYSTEM.SYSTEM_ACTIVATOR;
break;
case ControlType.Normal:
system_a = LibGPGX.INPUT_SYSTEM.SYSTEM_MD_GAMEPAD;
system_b = LibGPGX.INPUT_SYSTEM.SYSTEM_MD_GAMEPAD;
break;
case ControlType.OnePlayer:
system_a = LibGPGX.INPUT_SYSTEM.SYSTEM_MD_GAMEPAD;
break;
case ControlType.Xea1p:
system_a = LibGPGX.INPUT_SYSTEM.SYSTEM_XE_A1P;
break;
case ControlType.Teamplayer:
system_a = LibGPGX.INPUT_SYSTEM.SYSTEM_TEAMPLAYER;
system_b = LibGPGX.INPUT_SYSTEM.SYSTEM_TEAMPLAYER;
break;
case ControlType.Wayplay:
system_a = LibGPGX.INPUT_SYSTEM.SYSTEM_WAYPLAY;
system_b = LibGPGX.INPUT_SYSTEM.SYSTEM_WAYPLAY;
break;
case ControlType.Mouse:
system_a = LibGPGX.INPUT_SYSTEM.SYSTEM_MD_GAMEPAD;
// seems like mouse in port 1 would be supported, but not both at the same time
system_b = LibGPGX.INPUT_SYSTEM.SYSTEM_MOUSE;
break;
}
if (!Core.gpgx_init(romextension, LoadCallback, _syncSettings.UseSixButton, system_a, system_b, _syncSettings.Region, _syncSettings.GetNativeSettings()))
{
throw new Exception($"{nameof(Core.gpgx_init)}() failed");
}
{
int fpsnum = 60;
int fpsden = 1;
Core.gpgx_get_fps(ref fpsnum, ref fpsden);
VsyncNumerator = fpsnum;
VsyncDenominator = fpsden;
Region = VsyncNumerator / VsyncDenominator > 55 ? DisplayType.NTSC : DisplayType.PAL;
}
// when we call Seal, ANY pointer passed from managed code must be 0.
// this is so the initial state is clean
// the only two pointers set so far are LoadCallback, which the core zeroed itself,
// and CdCallback
Core.gpgx_set_cdd_callback(null);
_elf.Seal();
Core.gpgx_set_cdd_callback(cd_callback_handle);
SetControllerDefinition();
// pull the default video size from the core
UpdateVideo();
SetMemoryDomains();
InputCallback = new LibGPGX.input_cb(input_callback);
Core.gpgx_set_input_callback(InputCallback);
// process the non-init settings now
PutSettings(_settings);
//TODO - this hits performance, we need to make it controllable
CDCallback = new LibGPGX.CDCallback(CDCallbackProc);
InitMemCallbacks();
KillMemCallbacks();
_tracer = new GPGXTraceBuffer(this, MemoryDomains, this);
(ServiceProvider as BasicServiceProvider).Register <ITraceable>(_tracer);
}
_romfile = null;
}