From ac7d5ef06a6d6e8d84abbd1f0b82162725f98326 Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Thu, 11 May 1995 17:39:37 +0000
Subject: Initial revision

---
 cpukit/rtems/src/signal.c | 110 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 cpukit/rtems/src/signal.c

(limited to 'cpukit/rtems/src/signal.c')

diff --git a/cpukit/rtems/src/signal.c b/cpukit/rtems/src/signal.c
new file mode 100644
index 0000000000..411df5d86c
--- /dev/null
+++ b/cpukit/rtems/src/signal.c
@@ -0,0 +1,110 @@
+/*
+ *  Signal Manager
+ *
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  $Id$
+ */
+
+#include <rtems/system.h>
+#include <rtems/asr.h>
+#include <rtems/isr.h>
+#include <rtems/modes.h>
+#include <rtems/signal.h>
+#include <rtems/thread.h>
+
+/*PAGE
+ *
+ *  rtems_signal_catch
+ *
+ *  This directive allows a thread to specify what action to take when
+ *  catching signals.
+ *
+ *  Input parameters:
+ *    handler  - address of asynchronous signal routine (asr)
+ *              ( NULL indicates asr is invalid )
+ *    mode_set - mode value for asr
+ *
+ *  Output parameters:
+ *    RTEMS_SUCCESSFUL - always succeeds
+ */
+
+rtems_status_code rtems_signal_catch(
+  rtems_asr_entry   handler,
+  rtems_mode mode_set
+)
+{
+  Thread_Control *executing;
+
+  executing = _Thread_Executing;
+  _Thread_Disable_dispatch(); /* cannot reschedule while */
+                              /*   the thread is inconsistent */
+
+  if ( ! _ASR_Is_null_handler( handler ) ) {
+    executing->Signal.mode_set = mode_set;
+    executing->Signal.handler  = handler;
+  }
+  else
+    _ASR_Initialize( &executing->Signal );
+  _Thread_Enable_dispatch();
+  return( RTEMS_SUCCESSFUL );
+}
+
+/*PAGE
+ *
+ *  rtems_signal_send
+ *
+ *  This directive allows a thread to send signals to a thread.
+ *
+ *  Input parameters:
+ *    id         - thread id
+ *    signal_set - signal set
+ *
+ *  Output parameters:
+ *    RTEMS_SUCCESSFUL - if successful
+ *    error code - if unsuccessful
+ */
+
+rtems_status_code rtems_signal_send(
+  Objects_Id             id,
+  rtems_signal_set signal_set
+)
+{
+  register Thread_Control *the_thread;
+  Objects_Locations        location;
+
+  the_thread = _Thread_Get( id, &location );
+  switch ( location ) {
+    case OBJECTS_ERROR:
+      return( RTEMS_INVALID_ID );
+    case OBJECTS_REMOTE:
+      return _Signal_MP_Send_request_packet(
+        SIGNAL_MP_SEND_REQUEST,
+        id,
+        signal_set
+      );
+    case OBJECTS_LOCAL:
+      if ( ! _ASR_Is_null_handler( the_thread->Signal.handler ) ) {
+        if ( _Modes_Is_asr_disabled( the_thread->current_modes ) )
+          _ASR_Post_signals( signal_set, &the_thread->Signal.signals_pending );
+        else {
+          _ASR_Post_signals( signal_set, &the_thread->Signal.signals_posted );
+          if ( _ISR_Is_in_progress() && _Thread_Is_executing( the_thread ) )
+            _ISR_Signals_to_thread_executing = TRUE;
+        }
+        _Thread_Enable_dispatch();
+        return( RTEMS_SUCCESSFUL );
+      }
+      _Thread_Enable_dispatch();
+      return( RTEMS_NOT_DEFINED );
+  }
+
+  return( RTEMS_INTERNAL_ERROR );   /* unreached - only to remove warnings */
+}
-- 
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