Created
December 15, 2017 05:50
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osx sleep/ wake notifications in golang
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package main | |
import ( | |
"C" | |
"log" | |
"time" | |
) | |
//export CanSleep | |
func CanSleep() C.int { | |
time.Sleep(5 * time.Second) | |
return 1 | |
} | |
//export WillWake | |
func WillWake() { | |
time.Sleep(5 * time.Second) | |
log.Printf("Will Wake") | |
} | |
//export WillSleep | |
func WillSleep() { | |
time.Sleep(5 * time.Second) | |
log.Printf("Will Sleep") | |
} |
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package main | |
// #cgo LDFLAGS: -framework CoreFoundation -framework IOKit | |
// int CanSleep(); | |
// void WillWake(); | |
// void WillSleep(); | |
// #include "main.h" | |
import "C" | |
import ( | |
"log" | |
"time" | |
) | |
func main() { | |
go func() { | |
C.registerNotifications() | |
log.Printf("Go bye") | |
}() | |
log.Printf("Hello, World") | |
time.Sleep(time.Minute) | |
C.unregisterNotifications() | |
time.Sleep(time.Minute) | |
} |
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#include <ctype.h> | |
#include <stdlib.h> | |
#include <stdio.h> | |
#include <mach/mach_port.h> | |
#include <mach/mach_interface.h> | |
#include <mach/mach_init.h> | |
#include <IOKit/pwr_mgt/IOPMLib.h> | |
#include <IOKit/IOMessage.h> | |
io_connect_t root_port; // a reference to the Root Power Domain IOService | |
// notification port allocated by IORegisterForSystemPower | |
IONotificationPortRef notifyPortRef; | |
// notifier object, used to deregister later | |
io_object_t notifierObject; | |
// this parameter is passed to the callback | |
void *refCon; | |
CFRunLoopRef runLoop; | |
void MySleepCallBack(void *refCon, io_service_t service, natural_t messageType, void *messageArgument) | |
{ | |
printf("messageType %08lx, arg %08lx\n", | |
(long unsigned int)messageType, | |
(long unsigned int)messageArgument); | |
switch (messageType) | |
{ | |
case kIOMessageCanSystemSleep: | |
if (CanSleep()) | |
{ | |
IOAllowPowerChange(root_port, (long)messageArgument); | |
} | |
else | |
{ | |
IOCancelPowerChange(root_port, (long)messageArgument); | |
} | |
break; | |
case kIOMessageSystemWillSleep: | |
WillSleep(); | |
IOAllowPowerChange(root_port, (long)messageArgument); | |
break; | |
case kIOMessageSystemWillPowerOn: | |
WillWake(); | |
break; | |
case kIOMessageSystemHasPoweredOn: | |
break; | |
default: | |
break; | |
} | |
} | |
void registerNotifications() | |
{ | |
root_port = IORegisterForSystemPower(refCon, ¬ifyPortRef, MySleepCallBack, ¬ifierObject); | |
if (root_port == 0) | |
{ | |
printf("IORegisterForSystemPower failed\n"); | |
} | |
CFRunLoopAddSource(CFRunLoopGetCurrent(), | |
IONotificationPortGetRunLoopSource(notifyPortRef), kCFRunLoopCommonModes); | |
runLoop = CFRunLoopGetCurrent(); | |
CFRunLoopRun(); | |
} | |
void unregisterNotifications() | |
{ | |
CFRunLoopRemoveSource(runLoop, | |
IONotificationPortGetRunLoopSource(notifyPortRef), | |
kCFRunLoopCommonModes); | |
IODeregisterForSystemPower(¬ifierObject); | |
IOServiceClose(root_port); | |
IONotificationPortDestroy(notifyPortRef); | |
CFRunLoopStop(runLoop); | |
} |
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