ICvar callback example

import binutils

from binutils     import Convention
from custom_types import ICvar

# Get the server binary
server = binutils.find_binary('cstrike/bin/server')

# Get the ICvar interface
cvar = ICvar(server['cvar'].get_ptr())

# Create a global change callback
# typedef void ( *FnChangeCallback_t )( IConVar *var, const char *pOldValue, float flOldValue );
@binutils.callback(Convention.CDECL, 'pZf)v')
def cpp_change_callback(var, str_old_value, float_old_value, ebp):
    print (var, str_old_value, float_old_value)

# Install the callback
cvar.InstallGlobalChangeCallback(cpp_change_callback)

def unload():
    # Remove the callback
    cvar.RemoveGlobalChangeCallback(cpp_change_callback)

    # Free the memory
    cpp_change_callback.free()