Diff: scmRTOS/Common/OS_Kernel.cpp

Revision:

0:331db0b44b67

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scmRTOS/Common/OS_Kernel.cpp	Tue Sep 21 19:48:05 2010 +0000
@@ -0,0 +1,115 @@
+//******************************************************************************
+//*
+//*     FULLNAME:  Single-Chip Microcontroller Real-Time Operating System
+//*
+//*     NICKNAME:  scmRTOS
+//*
+//*     PURPOSE:  OS Kernel Source
+//*
+//*     Version: 3.10
+//*
+//*     $Revision: 256 $
+//*     $Date:: 2010-01-22 #$
+//*
+//*     Copyright (c) 2003-2010, Harry E. Zhurov
+//*
+//*     Permission is hereby granted, free of charge, to any person 
+//*     obtaining  a copy of this software and associated documentation 
+//*     files (the "Software"), to deal in the Software without restriction, 
+//*     including without limitation the rights to use, copy, modify, merge, 
+//*     publish, distribute, sublicense, and/or sell copies of the Software, 
+//*     and to permit persons to whom the Software is furnished to do so, 
+//*     subject to the following conditions:
+//*
+//*     The above copyright notice and this permission notice shall be included 
+//*     in all copies or substantial portions of the Software.
+//*
+//*     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+//*     EXPRESS  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+//*     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+//*     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 
+//*     CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
+//*     TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH 
+//*     THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//*
+//*     =================================================================
+//*     See http://scmrtos.sourceforge.net for documentation, latest
+//*     information, license and contact details.
+//*     =================================================================
+//*
+//******************************************************************************
+
+#include "scmRTOS.h"
+
+using namespace OS;
+//------------------------------------------------------------------------------
+OS::TKernel OS::Kernel;
+
+//------------------------------------------------------------------------------
+#if scmRTOS_CONTEXT_SWITCH_SCHEME == 0
+void TKernel::Sched()
+{
+    byte NextPrty = GetHighPriority(ReadyProcessMap);
+    if(NextPrty != CurProcPriority)
+    {
+        TStackItem*  Next_SP = ProcessTable[NextPrty]->StackPointer;
+        TStackItem** Curr_SP_addr = &(ProcessTable[CurProcPriority]->StackPointer);
+        CurProcPriority = NextPrty;
+        OS_ContextSwitcher(Curr_SP_addr, Next_SP);
+    }
+}
+#else
+//------------------------------------------------------------------------------
+void TKernel::Sched()
+{
+    byte NextPrty = GetHighPriority(ReadyProcessMap);
+    if(NextPrty != CurProcPriority)
+    {
+        SchedProcPriority = NextPrty;
+    
+        RaiseContextSwitch();
+        do
+        {
+            EnableContextSwitch();
+            DUMMY_INSTR();
+            DisableContextSwitch();
+        } 
+        while(!IsContextSwitchDone());
+    }
+}
+//------------------------------------------------------------------------------
+TStackItem* OS_ContextSwitchHook(TStackItem* sp) { return OS::Kernel.ContextSwitchHook(sp); }
+//------------------------------------------------------------------------------
+#endif // scmRTOS_CONTEXT_SWITCH_SCHEME
+//------------------------------------------------------------------------------
+void TBaseProcess::Sleep(TTimeout timeout)
+{
+    TCritSect cs;
+
+    Kernel.ProcessTable[Kernel.CurProcPriority]->Timeout = timeout;
+    Kernel.SetProcessUnready(Kernel.CurProcPriority);
+    Kernel.Scheduler();
+}
+//------------------------------------------------------------------------------
+void OS::WakeUpProcess(TBaseProcess& p)
+{
+    TCritSect cs;
+
+    if(p.Timeout)
+    {
+        p.Timeout = 0;
+        Kernel.SetProcessReady(p.Priority);
+        Kernel.Scheduler();
+    }
+}
+//------------------------------------------------------------------------------
+void OS::ForceWakeUpProcess(TBaseProcess& p)
+{
+    TCritSect cs;
+
+    p.Timeout = 0;
+    Kernel.SetProcessReady(p.Priority);
+    Kernel.Scheduler();
+}
+//------------------------------------------------------------------------------
+