wip: IPC and Runtime

Kernel/Include/OS/Scheduler.h

@@ -4,12 +4,31 @@
 #pragma once
 #include <Types.h>
 
+typedef enum {
+    kOSHandleTypeNone = 0,
+    kOSHandleTypeTask
+} OSHandleType;
+
+typedef struct {
+    OSHandleType type;
+    Pointer object;
+} OSHandle;
+
+enum {
+    kOSSchedulerTaskStackSize = 16 * 1024,
+    kOSSchedulerExceptionNumber = 0xF0F0,
+    kOSMaxHandlesPerProcess = 256,
+};
+
 typedef enum OSTaskState {
     OSTaskStateDead,
     OSTaskStateRunning,
     OSTaskStateReady,
     OSTaskStateBlocked,
     OSTaskStateSleeping,
+
+    OSTaskStateBlockedReceive,
+    OSTaskStateBlockedSend,
 } OSTaskState;
 
 typedef struct OSProcess {
@@ -20,11 +39,12 @@ typedef struct OSProcess {
     Address heapCurrent;
     struct OSProcess* parent;
     ASCII name[32];
+
+    OSHandle handles[kOSMaxHandlesPerProcess];
 } OSProcess;
 
 typedef struct OSTask {
     Address stackPointer;
-    struct OSTask* next;
     UInt32 id;
     UInt32 sleepTicks;
     OSTaskState state;
@@ -32,12 +52,10 @@ typedef struct OSTask {
     Pointer kernelStackBase;
     OSProcess* process;
     Int32 waitingForProcessId;
-} OSTask;
 
-enum {
-    kOSSchedulerTaskStackSize = 16 * 1024,
-    kOSSchedulerExceptionNumber = 0xF0F0
-};
+    struct OSTask* next;
+    struct OSTask* senderWaiting;
+} OSTask;
 
 extern UInt32 gOSSchedulerNextProcessID;
 
@@ -46,3 +64,7 @@ OSTask* SchedulerSpawn(void(*entryPoint)(), OSProcess* owner, Boolean isUser, Ad
 Address SchedulerNext(Address stackPointer);
 void SchedulerYield(UInt64 ticks);
 UInt64 SchedulerGetNextProcessID();
+void SchedulerBlockCurrentTask(UInt32 newState);
+OSTask* SchedulerGetCurrentTask();
+Int32 SchedulerProcessAllocateHandle(OSProcess* process, OSHandleType type, Pointer object);
+Pointer SchedulerProcessGetHandle(OSProcess* process, UInt32 handleId, OSHandleType expectedType);