feat: unify system status codes

kernel/src/Api/Window.hpp

@@ -15,16 +15,16 @@
 namespace montauk::abi {
 
     static int Sys_WinCreate(const char* title, int w, int h, WinCreateResult* result) {
-        if (result == nullptr || title == nullptr) return -1;
+        if (result == nullptr || title == nullptr) return InvalidArgument;
         auto* proc = Sched::GetCurrentProcessPtr();
-        if (proc == nullptr) return -1;
+        if (proc == nullptr) return GenericFailure;
 
         uint64_t outVa = 0;
         int id = WinServer::Create(proc->pid, proc->pml4Phys, title, w, h,
                                    proc->heapNext, outVa);
         result->id = id;
         result->pixelVa = (id >= 0) ? outVa : 0;
-        return id >= 0 ? 0 : -1;
+        return id >= 0 ? Success : id;
     }
 
     static int Sys_WinDestroy(int windowId) {
@@ -36,7 +36,7 @@ namespace montauk::abi {
     }
 
     static int Sys_WinPoll(int windowId, WinEvent* outEvent) {
-        if (outEvent == nullptr) return -1;
+        if (outEvent == nullptr) return InvalidArgument;
         return WinServer::Poll(windowId, Sched::GetCurrentPid(), outEvent);
     }
 
@@ -58,13 +58,13 @@ namespace montauk::abi {
 
     static int Sys_WinUnmap(int windowId) {
         auto* proc = Sched::GetCurrentProcessPtr();
-        if (proc == nullptr) return -1;
+        if (proc == nullptr) return GenericFailure;
         return WinServer::Unmap(windowId, proc->pid, proc->pml4Phys);
     }
 
     static int Sys_WinSendEvent(int windowId, const WinEvent* event) {
-        if (!Sched::HasCapability(CAP_COMPOSITOR)) return SYS_ERR_PERMISSION;
-        if (event == nullptr) return -1;
+        if (!Sched::HasCapability(CAP_COMPOSITOR)) return CapabilityDenied;
+        if (event == nullptr) return InvalidArgument;
         return WinServer::SendEvent(windowId, event);
     }