Kernel - Signals partially implimented

[tpg/acess2.git] / KernelLand / Kernel / threads.c

diff --git a/KernelLand/Kernel/threads.c b/KernelLand/Kernel/threads.c
index 7dd9f6e..007d16f 100644 (file)
--- a/KernelLand/Kernel/threads.c
+++ b/KernelLand/Kernel/threads.c
@@ -66,6 +66,10 @@ tThread      *Threads_RemActive(void);
 void   Threads_ToggleTrace(int TID);
 void   Threads_Fault(int Num);
 void   Threads_SegFault(tVAddr Addr);
+void   Threads_PostSignal(int SignalNum);
+ int   Threads_GetPendingSignal(void);
+void   Threads_SetSignalHandler(int SignalNum, void *Handler);
+void   *Threads_GetSignalHandler(int SignalNum);
 #if 0
  int   Threads_GetPID(void);
  int   Threads_GetTID(void);
@@ -1004,6 +1008,62 @@ void Threads_SegFault(tVAddr Addr)
        //Threads_Exit( 0, -1 );
 }
 
+
+void Threads_PostSignal(int SignalNum)
+{
+       tThread *cur = Proc_GetCurThread();
+       cur->PendingSignal = SignalNum;
+       Threads_PostEvent(cur, THREAD_EVENT_SIGNAL);
+}
+
+/**
+ */
+int Threads_GetPendingSignal(void)
+{
+       tThread *cur = Proc_GetCurThread();
+       
+       // Atomic AND with 0 fetches and clears in one operation
+       return __sync_fetch_and_and( &cur->PendingSignal, 0 );
+}
+
+/*
+ * \brief Update the current thread's signal handler
+ */
+void Threads_SetSignalHandler(int SignalNum, void *Handler)
+{
+       if( SignalNum <= 0 || SignalNum >= NSIGNALS )
+               return ;
+       if( !MM_IsUser(Handler) )
+               return ;
+       Proc_GetCurThread()->Process->SignalHandlers[SignalNum] = Handler;
+}
+
+/**
+ * \return 0  Ignore
+ */
+void *Threads_GetSignalHandler(int SignalNum)
+{
+       if( SignalNum <= 0 || SignalNum >= NSIGNALS )
+               return NULL;
+       void *ret = Proc_GetCurThread()->Process->SignalHandlers[SignalNum];
+       if( !ret )
+       {
+               // Defaults
+               switch(SignalNum)
+               {
+               case SIGINT:
+               case SIGKILL:
+               case SIGSEGV:
+//                     ret = User_Signal_Kill;
+                       break;
+               default:
+                       ret = NULL;
+                       break;
+               }
+       }
+       return ret;
+}
+
 // --- Process Structure Access Functions ---
 tPGID Threads_GetPGID(void)
 {