Have access to set_cores as the library

[kenzlegouge]

State your operating system:

Windows

DesMuME version

0.9.13

Issue

I would like to open DesMuMe using the dll, and set the number of cores. Although options exist for command-lines, they are not visible when you skip this.

Would it be possibe to add it ? Here is an example of how I would see this. From [desmume/src/frontend/windows/main.cpp]

EXPORTED void desmume_set_cores(int num_cores)
{
    CommonSettings.num_cores = _num_cores
}

[zeromus]

This one option is a drop in the bucket. instead, you should add a method that boots up a desmume library using the provded commandline so that it can parse all options. alternatively, we should have patterns you can use to add an ini option for num_cores which would get read before the commandline, I think

[kenzlegouge]

Thank you very much for your help.

I can maybe set myself more clear. I want to launch multiple instances of DesMuMe and feed it to a learner. For this, I am using py-desmume to interact with DesMuMe (https://github.com/SkyTemple/py-desmume).

Using this minimal code, you can reproduce the error yourself.

import desmume
from desmume.emulator import DeSmuME
emu = DeSmuME()
emu2 = DeSmuME()

Traceback (most recent call last):

Cell In[4], line 1
emu2 = DeSmuME()

File ~\anaconda3\envs\mkds\lib\site-packages\desmume\emulator.py:981 in init
if self.lib.desmume_init() < 0:

OSError: exception: access violation writing 0x0000000000000000

I can launch two emu instances using the .exe file and cmd lines, however not with this method. I suspect there is some clash with cores and memory attribution but I am not sure. Would you have any idea what could cause this ?

I am using windows 11 and Python 3.10.14, if it matters.

Best

[zeromus]

Desmume doesn't support running more than one instance per process. This is engineered into it from the ground up. Your plan will never work. You must use separate processes.