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fix problem when immediately loading another genesis game with one open trashes the sram

This commit is contained in:
goyuken 2013-12-18 02:12:21 +00:00
parent adc3df41bd
commit 8944552c34
1 changed files with 55 additions and 23 deletions
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78
BizHawk.Emulation.Cores/Consoles/Sega/gpgx/GPGX.cs
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@ -310,47 +310,77 @@ namespace BizHawk.Emulation.Cores.Consoles.Sega.gpgx
#region saveram
byte[] DisposedSaveRam = null;
public byte[] ReadSaveRam()
{
int size = 0;
IntPtr area = IntPtr.Zero;
LibGPGX.gpgx_get_sram(ref area, ref size);
if (size <= 0 || area == IntPtr.Zero)
return new byte[0];
LibGPGX.gpgx_sram_prepread();
if (disposed)
{
return DisposedSaveRam ?? new byte[0];
}
else
{
int size = 0;
IntPtr area = IntPtr.Zero;
LibGPGX.gpgx_get_sram(ref area, ref size);
if (size <= 0 || area == IntPtr.Zero)
return new byte[0];
LibGPGX.gpgx_sram_prepread();
byte[] ret = new byte[size];
Marshal.Copy(area, ret, 0, size);
return ret;
byte[] ret = new byte[size];
Marshal.Copy(area, ret, 0, size);
return ret;
}
}
public void StoreSaveRam(byte[] data)
{
int size = 0;
IntPtr area = IntPtr.Zero;
LibGPGX.gpgx_get_sram(ref area, ref size);
if (size <= 0 || area == IntPtr.Zero)
return;
if (size != data.Length)
throw new Exception("Unexpected saveram size");
if (disposed)
{
throw new ObjectDisposedException(typeof(GPGX).ToString());
}
else
{
int size = 0;
IntPtr area = IntPtr.Zero;
LibGPGX.gpgx_get_sram(ref area, ref size);
if (size <= 0 || area == IntPtr.Zero)
return;
if (size != data.Length)
throw new Exception("Unexpected saveram size");
Marshal.Copy(data, 0, area, size);
LibGPGX.gpgx_sram_commitwrite();
Marshal.Copy(data, 0, area, size);
LibGPGX.gpgx_sram_commitwrite();
}
}
public void ClearSaveRam()
{
LibGPGX.gpgx_clear_sram();
if (disposed)
{
throw new ObjectDisposedException(typeof(GPGX).ToString());
}
else
{
LibGPGX.gpgx_clear_sram();
}
}
public bool SaveRamModified
{
get
{
int size = 0;
IntPtr area = IntPtr.Zero;
LibGPGX.gpgx_get_sram(ref area, ref size);
return size > 0 && area != IntPtr.Zero;
if (disposed)
{
throw new ObjectDisposedException(typeof(GPGX).ToString());
}
else
{
int size = 0;
IntPtr area = IntPtr.Zero;
LibGPGX.gpgx_get_sram(ref area, ref size);
return size > 0 && area != IntPtr.Zero;
}
}
set
{
@ -450,6 +480,8 @@ namespace BizHawk.Emulation.Cores.Consoles.Sega.gpgx
{
if (AttachedCore != this)
throw new Exception();
if (SaveRamModified)
DisposedSaveRam = ReadSaveRam();
AttachedCore = null;
disposed = true;
}