wip: IPC and Runtime

Kernel/Source/OS/Scheduler.c

@@ -69,6 +69,7 @@ OSTask* SchedulerSpawn(void(*entryPoint)(), OSProcess* owner, Boolean isUser, Ad
     task->waitingForProcessId = -1;
 
     task->next = gOSSchedulerCurrentTask->next;
+    task->senderWaiting = nullptr;
     gOSSchedulerCurrentTask->next = task;
 
     return task;
@@ -126,3 +127,30 @@ void SchedulerYield(UInt64 ticks) {
 UInt64 SchedulerGetNextProcessID() {
     return gOSSchedulerNextProcessID++;
 }
+
+void SchedulerBlockCurrentTask(UInt32 newState) {
+    gOSSchedulerCurrentTask->state = newState;
+    CPUException(kOSSchedulerExceptionNumber);
+}
+
+OSTask* SchedulerGetCurrentTask() {
+    return gOSSchedulerCurrentTask;
+}
+
+Int32 SchedulerProcessAllocateHandle(OSProcess* process, OSHandleType type, Pointer object) {
+    for (Int32 i = 1; i < kOSMaxHandlesPerProcess; i++) {
+        if (process->handles[i].type == kOSHandleTypeNone) {
+            process->handles[i].type = type;
+            process->handles[i].object = object;
+            return i;
+        }
+    }
+    return -1;
+}
+
+Pointer SchedulerProcessGetHandle(OSProcess* process, UInt32 handleId, OSHandleType expectedType) {
+    if (handleId == 0 || handleId >= kOSMaxHandlesPerProcess) return nullptr;
+    OSHandle* handle = &process->handles[handleId];
+    if (handle->type != expectedType) return nullptr;
+    return handle->object;
+}