fuck yes

procmon.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+	"runtime"
+)
+
+/*
+#cgo CFLAGS: -x objective-c
+#cgo LDFLAGS: -framework AppKit
+#include "procmon.h"
+*/
+import "C"
+
+//export TheGoFunc
+func TheGoFunc(name string) {
+	fmt.Printf("hi from c: %s\n", name)
+}
+
+func main() {
+	C.TheCFunc()
+	runtime.Goexit()
+}

procmon.h

@@ -0,0 +1,3 @@
+#import <AppKit/AppKit.h>
+
+void TheCFunc();

procmon.m

@@ -0,0 +1,66 @@
+#include "procmon.h"
+#import "_cgo_export.h"
+#import <AppKit/AppKit.h>
+
+@interface ProcWatcher : NSObject
++ (instancetype) shared;
+- (void) applicationDidLaunch:(NSNotification*) notification;
+@end
+
+@implementation ProcWatcher
+
++ (instancetype) shared {
+    static id sharedInstance;
+    static dispatch_once_t predicate;
+
+    NSLog(@"ProcWatcher shared instance accessed");
+
+    dispatch_once(&predicate, ^{
+        TheGoFunc((GoString){"dispatch", 8});
+        sharedInstance = [ProcWatcher new];
+    });
+    return sharedInstance;
+}
+
+- (void) applicationDidLaunch:(NSNotification*) notification {
+    NSDictionary* info = notification.userInfo;
+    NSRunningApplication* app = info[NSWorkspaceApplicationKey];
+    NSString* bundleId = app.bundleIdentifier;
+
+    NSLog(@"application launched: %@", bundleId);
+
+    TheGoFunc((GoString){bundleId.UTF8String, bundleId.length});
+}
+
+@end
+
+void TheCFunc() {
+    NSLog(@"current run loop: %@", [NSRunLoop currentRunLoop]);
+    NSLog(@"current run loop mode: %@", [[NSRunLoop currentRunLoop] currentMode]);
+    NSLog(@"current run loop mode: %@", [[NSRunLoop currentRunLoop] currentMode]);
+
+    if ([NSThread isMainThread]) {
+        NSLog(@"TheCFunc is in the main thread");
+    } else {
+        NSLog(@"TheCFunc is NOT in the main thread");
+    }
+
+    NSLog(@"hi from nslog");
+    TheGoFunc((GoString){"hi", 2});
+
+    NSArray* running = [[NSWorkspace sharedWorkspace] runningApplications];
+    NSLog(@"%@", running);
+    
+    ProcWatcher* pw = [ProcWatcher shared];
+
+    NSNotificationCenter* notifications = [[NSWorkspace sharedWorkspace] notificationCenter];
+   
+    [notifications
+        addObserver: pw
+        selector: @selector(applicationDidLaunch:)
+        name: NSWorkspaceDidLaunchApplicationNotification object: nil];
+
+    NSLog(@"thing has finished");
+
+    [[NSRunLoop currentRunLoop] run];
+}