When battery level is critical, try to put macOS into sleep/hibernate…

… mode only once per minute.

Changelog.md

@@ -1,5 +1,8 @@
 HibernationFixup Changelog
 ============================
+#### v1.4.5
+- When battery level is critical, try to put macOS into sleep/hibernate mode only once per minute.
+
 #### v1.4.4
 - Automatically puts macOS into sleep/hibernate mode when WhenBatteryIsAtWarnLevel or WhenBatteryAtCriticalLevel bit is set in hbfx-ahbm. If battery kext does not provide these levels, additional bits for remaining capacity can be specified (RemainCapacityBit1, RemainCapacityBit2, RemainCapacityBit3, RemainCapacityBit4).
 

HibernationFixup/kern_hbfx.cpp

@@ -161,6 +161,11 @@ IOReturn HBFX::IOHibernateSystemWake(void)
 
 	if (callbackHBFX->nextSleepTimer)
 		callbackHBFX->nextSleepTimer->cancelTimeout();
+
+	if (callbackHBFX->checkCapacityTimer) {
+		callbackHBFX->checkCapacityTimer->cancelTimeout();
+		callbackHBFX->checkCapacityTimer->setTimeoutMS(60000);
+	}
 
 	if (result == KERN_SUCCESS && wakeType && wakeReason)
 	{
@@ -185,8 +190,6 @@ IOReturn HBFX::IOHibernateSystemWake(void)
 void HBFX::IOPMrootDomain_evaluatePolicy(IOPMrootDomain* that, int stimulus, uint32_t arg)
 {
 	DBGLOG("HBFX", "evaluatePolicy called, stimulus = 0x%x", stimulus);
-
-	callbackHBFX->checkCapacity();
 
 	auto autoHibernateMode = ADDPR(hbfx_config).autoHibernateMode;
 	if (autoHibernateMode & Configuration::DisableStimulusDarkWakeActivityTickle) {
@@ -218,6 +221,11 @@ void HBFX::IOPMrootDomain_willEnterFullWake(IOPMrootDomain* that)
 
 	if (callbackHBFX->nextSleepTimer)
 		callbackHBFX->nextSleepTimer->cancelTimeout();
+
+	if (callbackHBFX->checkCapacityTimer) {
+		callbackHBFX->checkCapacityTimer->cancelTimeout();
+		callbackHBFX->checkCapacityTimer->setTimeoutMS(60000);
+	}
 }
 
 //==============================================================================
@@ -505,6 +513,14 @@ IOReturn HBFX::IOPCIBridge_restoreMachineState(IOService *that, IOOptionBits opt
 	if (kMachineRestoreDehibernate & options)
 		callbackHBFX->correct_pci_config_command = false;
 
+	if (callbackHBFX->nextSleepTimer)
+		callbackHBFX->nextSleepTimer->cancelTimeout();
+
+	if (callbackHBFX->checkCapacityTimer) {
+		callbackHBFX->checkCapacityTimer->cancelTimeout();
+		callbackHBFX->checkCapacityTimer->setTimeoutMS(60000);
+	}
+
 	return result;
 }
 
@@ -959,6 +975,8 @@ void HBFX::readConfigFromNVRAM()
 	}
 	else
 	{
+		DBGLOG("HBFX", "readConfigFromNVRAM: use EfiRuntimeServices");
+
 		auto rt = EfiRuntimeServices::get(true);
 		if (rt) {
 			constexpr const size_t buf_size = 64;