DirectResult
fusion_ref_watch (FusionRef *ref, FusionCall *call, int call_arg)
{
DirectResult ret;
D_ASSERT( ref != NULL );
D_ASSERT( call != NULL );
ret = fusion_skirmish_prevail( &ref->multi.builtin.lock );
if (ret)
return ret;
if (ref->multi.builtin.local+ref->multi.builtin.global == 0) {
D_BUG( "ref has no references" );
ret = DR_BUG;
}
else if (ref->multi.builtin.call) {
ret = DR_BUSY;
}
else {
ref->multi.builtin.call = call;
ref->multi.builtin.call_arg = call_arg;
fusion_skirmish_notify( &ref->multi.builtin.lock );
}
fusion_skirmish_dismiss( &ref->multi.builtin.lock );
return ret;
}
DirectResult
_fusion_ref_change (FusionRef *ref, int add, bool global)
{
DirectResult ret;
D_ASSERT( ref != NULL );
D_ASSERT( add != 0 );
ret = fusion_skirmish_prevail( &ref->multi.builtin.lock );
if (ret)
return ret;
if (global) {
if (ref->multi.builtin.global+add < 0) {
D_BUG( "ref has no global references" );
fusion_skirmish_dismiss( &ref->multi.builtin.lock );
return DR_BUG;
}
ref->multi.builtin.global += add;
}
else {
if (ref->multi.builtin.local+add < 0) {
D_BUG( "ref has no local references" );
fusion_skirmish_dismiss( &ref->multi.builtin.lock );
return DR_BUG;
}
ref->multi.builtin.local += add;
_fusion_add_local( _fusion_world(ref->multi.shared), ref, add );
}
if (ref->multi.builtin.local+ref->multi.builtin.global == 0) {
fusion_skirmish_notify( &ref->multi.builtin.lock );
if (ref->multi.builtin.call) {
fusion_skirmish_dismiss( &ref->multi.builtin.lock );
return fusion_call_execute( ref->multi.builtin.call, FCEF_ONEWAY,
ref->multi.builtin.call_arg, NULL, NULL );
}
}
fusion_skirmish_dismiss( &ref->multi.builtin.lock );
return DR_OK;
}
void
dfb_core_activate( CoreDFB *core )
{
CoreDFBShared *shared;
D_MAGIC_ASSERT( core, CoreDFB );
shared = core->shared;
D_MAGIC_ASSERT( shared, CoreDFBShared );
fusion_skirmish_prevail( &shared->lock );
shared->active = true;
fusion_skirmish_notify( &shared->lock );
fusion_skirmish_dismiss( &shared->lock );
}
