IoSleepStrategies: increment notifications stats in the AbstractIoSleepStrategy

The WaitfdSleepStrategy did not gather the amount of posted notifications
but the PipeSleepStrategy did.
Move the stats accounting into AbstractIoSleepStrategy so all derived
strategies track the amount of written notifications.

emper/sleep_strategy/AbstractIoSleepStrategy.hpp

@@ -271,6 +271,7 @@ class AbstractIoSleepStrategy : public Logger<LogSubsystem::SLEEP_S> {
 		const unsigned toWakeup = getSleeperCountToWakeup<callerEnvironment>(sleeping, count);
 		if (toWakeup) {
 			stats.incNotify();
+			stats.addNotifications(toWakeup);
 			if constexpr (callerEnvironment == CallerEnvironment::EMPER) {
 				writeNotificationsFromEmper(hint, toWakeup);
 			} else {

emper/sleep_strategy/PipeSleepStrategy.hpp

@@ -14,7 +14,6 @@
 #include "emper-common.h"
 #include "sleep_strategy/AbstractIoSleepStrategy.hpp"
 #include "sleep_strategy/AbstractWorkerSleepStrategy.hpp"
-#include "sleep_strategy/Stats.hpp"
 
 class Runtime;
 
@@ -47,8 +46,6 @@ class PipeSleepStrategy : public AbstractWorkerSleepStrategy<PipeSleepStrategy>,
 	Pipe global;
 
 	void writeNotifications(emper::FiberHint hint, unsigned count) {
-		stats.addNotifications(count);
-
 		std::vector<void*> hints(count, hint);
 
 		ssize_t res = write(global.notifyFd, hints.data(), sizeof(void*) * hints.size());