75             : issubscribed(initial)  in base_subscription_state()
81         std::atomic<bool> issubscribed;  member in rxcpp::subscription::base_subscription_state
97             if (issubscribed.exchange(false)) {  in unsubscribe()
176         return state->issubscribed;  in is_subscribed()
256         std::atomic<bool> issubscribed;  member
265             : issubscribed(true)  in composite_subscription_state()
269             : issubscribed(false)  in composite_subscription_state()
285             if (!issubscribed) {  // load.acq [seq_cst]  in add()
289                 if (!issubscribed) {  // load.acq [seq_cst]  in add()
306             if (issubscribed) { // load.acq [seq_cst]  in remove()
317                 if (issubscribed) { // load.acq [seq_cst]  in remove()
335             if (issubscribed) { // load.acq [seq_cst]  in clear()
338                 if (!issubscribed) { // load.acq [seq_cst]  in clear()
367             if (issubscribed.exchange(false)) {  // cas.acq_rel [seq_cst]  in unsubscribe()