From 05df0a846f436295a490cc9ac19e5a4061c3a575 Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Mon, 17 May 1999 20:41:13 +0000
Subject: Thread Handler split into multiple files.  Eventually, as RTEMS is
 split into one function per file, this will decrease the size of executables.

---
 cpukit/score/src/threadhandler.c | 119 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 cpukit/score/src/threadhandler.c

(limited to 'cpukit/score/src/threadhandler.c')

diff --git a/cpukit/score/src/threadhandler.c b/cpukit/score/src/threadhandler.c
new file mode 100644
index 0000000000..bd4e4d319f
--- /dev/null
+++ b/cpukit/score/src/threadhandler.c
@@ -0,0 +1,119 @@
+/*
+ *  Thread Handler
+ *
+ *
+ *  COPYRIGHT (c) 1989-1998.
+ *  On-Line Applications Research Corporation (OAR).
+ *  Copyright assigned to U.S. Government, 1994.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in found in the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#include <rtems/system.h>
+#include <rtems/score/apiext.h>
+#include <rtems/score/context.h>
+#include <rtems/score/interr.h>
+#include <rtems/score/isr.h>
+#include <rtems/score/object.h>
+#include <rtems/score/priority.h>
+#include <rtems/score/states.h>
+#include <rtems/score/sysstate.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/threadq.h>
+#include <rtems/score/userext.h>
+#include <rtems/score/wkspace.h>
+
+/*PAGE
+ *
+ *  _Thread_Handler
+ *
+ *  This routine is the "primal" entry point for all threads.
+ *  _Context_Initialize() dummies up the thread's initial context
+ *  to cause the first Context_Switch() to jump to _Thread_Handler().
+ *
+ *  This routine is the default thread exitted error handler.  It is
+ *  returned to when a thread exits.  The configured fatal error handler
+ *  is invoked to process the exit.
+ *
+ *  NOTE:
+ *
+ *  On entry, it is assumed all interrupts are blocked and that this
+ *  routine needs to set the initial isr level.  This may or may not 
+ *  actually be needed by the context switch routine and as a result
+ *  interrupts may already be at there proper level.  Either way,
+ *  setting the initial isr level properly here is safe.
+ *  
+ *  Currently this is only really needed for the posix port,
+ *  ref: _Context_Switch in unix/cpu.c
+ *
+ *  Input parameters:   NONE
+ *
+ *  Output parameters:  NONE
+ */
+
+void _Thread_Handler( void )
+{
+  ISR_Level  level;
+  Thread_Control *executing;
+ 
+  executing = _Thread_Executing;
+ 
+  /*
+   * have to put level into a register for those cpu's that use
+   * inline asm here
+   */
+ 
+  level = executing->Start.isr_level;
+  _ISR_Set_level(level);
+
+  /*
+   * Take care that 'begin' extensions get to complete before
+   * 'switch' extensions can run.  This means must keep dispatch
+   * disabled until all 'begin' extensions complete.
+   */
+ 
+  _User_extensions_Thread_begin( executing );
+ 
+  /*
+   *  At this point, the dispatch disable level BETTER be 1.
+   */
+
+  _Thread_Enable_dispatch();
+ 
+  switch ( executing->Start.prototype ) {
+    case THREAD_START_NUMERIC:
+      (*(Thread_Entry_numeric) executing->Start.entry_point)(
+        executing->Start.numeric_argument
+      );
+      break;
+    case THREAD_START_POINTER:
+      (*(Thread_Entry_pointer) executing->Start.entry_point)(
+        executing->Start.pointer_argument
+      );
+      break;
+    case THREAD_START_BOTH_POINTER_FIRST:
+      (*(Thread_Entry_both_pointer_first) executing->Start.entry_point)( 
+        executing->Start.pointer_argument,
+        executing->Start.numeric_argument
+      );
+      break;
+    case THREAD_START_BOTH_NUMERIC_FIRST:
+      (*(Thread_Entry_both_numeric_first) executing->Start.entry_point)( 
+        executing->Start.numeric_argument,
+        executing->Start.pointer_argument
+      );
+      break;
+  }
+
+  _User_extensions_Thread_exitted( executing );
+
+  _Internal_error_Occurred(
+    INTERNAL_ERROR_CORE,
+    TRUE,
+    INTERNAL_ERROR_THREAD_EXITTED
+  );
+}
-- 
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