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scmRTOS/Common/OS_Kernel.h@0:96cf274f19bc, 2011-05-23 (annotated)

Committer:: etudiant12
Date:: Mon May 23 05:40:11 2011 +0000
Revision:: 0:96cf274f19bc

Who changed what in which revision?

User	Revision	Line number	New contents of line
etudiant12	0:96cf274f19bc	1	//******************************************************************************
etudiant12	0:96cf274f19bc	2	//*
etudiant12	0:96cf274f19bc	3	//* FULLNAME: Single-Chip Microcontroller Real-Time Operating System
etudiant12	0:96cf274f19bc	4	//*
etudiant12	0:96cf274f19bc	5	//* NICKNAME: scmRTOS
etudiant12	0:96cf274f19bc	6	//*
etudiant12	0:96cf274f19bc	7	//* PURPOSE: OS Kernel Header. Declarations And Definitions
etudiant12	0:96cf274f19bc	8	//*
etudiant12	0:96cf274f19bc	9	//* Version: 3.10
etudiant12	0:96cf274f19bc	10	//*
etudiant12	0:96cf274f19bc	11	//* $Revision: 256 $
etudiant12	0:96cf274f19bc	12	//* $Date:: 2010-01-22 #$
etudiant12	0:96cf274f19bc	13	//*
etudiant12	0:96cf274f19bc	14	//* Copyright (c) 2003-2010, Harry E. Zhurov
etudiant12	0:96cf274f19bc	15	//*
etudiant12	0:96cf274f19bc	16	//* Permission is hereby granted, free of charge, to any person
etudiant12	0:96cf274f19bc	17	//* obtaining a copy of this software and associated documentation
etudiant12	0:96cf274f19bc	18	//* files (the "Software"), to deal in the Software without restriction,
etudiant12	0:96cf274f19bc	19	//* including without limitation the rights to use, copy, modify, merge,
etudiant12	0:96cf274f19bc	20	//* publish, distribute, sublicense, and/or sell copies of the Software,
etudiant12	0:96cf274f19bc	21	//* and to permit persons to whom the Software is furnished to do so,
etudiant12	0:96cf274f19bc	22	//* subject to the following conditions:
etudiant12	0:96cf274f19bc	23	//*
etudiant12	0:96cf274f19bc	24	//* The above copyright notice and this permission notice shall be included
etudiant12	0:96cf274f19bc	25	//* in all copies or substantial portions of the Software.
etudiant12	0:96cf274f19bc	26	//*
etudiant12	0:96cf274f19bc	27	//* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
etudiant12	0:96cf274f19bc	28	//* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
etudiant12	0:96cf274f19bc	29	//* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
etudiant12	0:96cf274f19bc	30	//* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
etudiant12	0:96cf274f19bc	31	//* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
etudiant12	0:96cf274f19bc	32	//* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH
etudiant12	0:96cf274f19bc	33	//* THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
etudiant12	0:96cf274f19bc	34	//*
etudiant12	0:96cf274f19bc	35	//* =================================================================
etudiant12	0:96cf274f19bc	36	//* See http://scmrtos.sourceforge.net for documentation, latest
etudiant12	0:96cf274f19bc	37	//* information, license and contact details.
etudiant12	0:96cf274f19bc	38	//* =================================================================
etudiant12	0:96cf274f19bc	39	//*
etudiant12	0:96cf274f19bc	40	//*****************************************************************************
etudiant12	0:96cf274f19bc	41
etudiant12	0:96cf274f19bc	42	#ifndef OS_KERNEL_H
etudiant12	0:96cf274f19bc	43	#define OS_KERNEL_H
etudiant12	0:96cf274f19bc	44
etudiant12	0:96cf274f19bc	45	#include <stddef.h>
etudiant12	0:96cf274f19bc	46	#include <commdefs.h>
etudiant12	0:96cf274f19bc	47	#include <usrlib.h>
etudiant12	0:96cf274f19bc	48
etudiant12	0:96cf274f19bc	49	//------------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	50
etudiant12	0:96cf274f19bc	51	//==============================================================================
etudiant12	0:96cf274f19bc	52	extern "C" void OS_Start(TStackItem* sp);
etudiant12	0:96cf274f19bc	53
etudiant12	0:96cf274f19bc	54	#if scmRTOS_CONTEXT_SWITCH_SCHEME == 0
etudiant12	0:96cf274f19bc	55	extern "C" void OS_ContextSwitcher(TStackItem** Curr_SP, TStackItem* Next_SP);
etudiant12	0:96cf274f19bc	56	#else
etudiant12	0:96cf274f19bc	57	extern "C" TStackItem* OS_ContextSwitchHook(TStackItem* sp);
etudiant12	0:96cf274f19bc	58	#endif
etudiant12	0:96cf274f19bc	59
etudiant12	0:96cf274f19bc	60	//==============================================================================
etudiant12	0:96cf274f19bc	61
etudiant12	0:96cf274f19bc	62	//------------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	63	//
etudiant12	0:96cf274f19bc	64	//
etudiant12	0:96cf274f19bc	65	// NAME : OS
etudiant12	0:96cf274f19bc	66	//
etudiant12	0:96cf274f19bc	67	// PURPOSE : Namespace for all OS stuff
etudiant12	0:96cf274f19bc	68	//
etudiant12	0:96cf274f19bc	69	// DESCRIPTION: Includes: Kernel,
etudiant12	0:96cf274f19bc	70	// Processes,
etudiant12	0:96cf274f19bc	71	// Mutexes,
etudiant12	0:96cf274f19bc	72	// Event Flags,
etudiant12	0:96cf274f19bc	73	// Byte-wide Channels,
etudiant12	0:96cf274f19bc	74	// Arbitrary-type Channels,
etudiant12	0:96cf274f19bc	75	// Messages
etudiant12	0:96cf274f19bc	76	//
etudiant12	0:96cf274f19bc	77	namespace OS
etudiant12	0:96cf274f19bc	78	{
etudiant12	0:96cf274f19bc	79	class TBaseProcess;
etudiant12	0:96cf274f19bc	80
etudiant12	0:96cf274f19bc	81	INLINE inline void SetPrioTag(TProcessMap& pm, const TProcessMap PrioTag) { pm \|= PrioTag; }
etudiant12	0:96cf274f19bc	82	INLINE inline void ClrPrioTag(TProcessMap& pm, const TProcessMap PrioTag) { pm &= ~PrioTag; }
etudiant12	0:96cf274f19bc	83
etudiant12	0:96cf274f19bc	84	//--------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	85	//
etudiant12	0:96cf274f19bc	86	// NAME : TKernel
etudiant12	0:96cf274f19bc	87	//
etudiant12	0:96cf274f19bc	88	/// Implements kernel-level operations such as
etudiant12	0:96cf274f19bc	89	/// process management, process-level scheduling,
etudiant12	0:96cf274f19bc	90	/// ISR-level scheduling, system timing.
etudiant12	0:96cf274f19bc	91	//
etudiant12	0:96cf274f19bc	92	// DESCRIPTION:
etudiant12	0:96cf274f19bc	93	//
etudiant12	0:96cf274f19bc	94	//
etudiant12	0:96cf274f19bc	95	class TKernel
etudiant12	0:96cf274f19bc	96	{
etudiant12	0:96cf274f19bc	97	//-----------------------------------------------------------
etudiant12	0:96cf274f19bc	98	//
etudiant12	0:96cf274f19bc	99	// Declarations
etudiant12	0:96cf274f19bc	100	//
etudiant12	0:96cf274f19bc	101
etudiant12	0:96cf274f19bc	102
etudiant12	0:96cf274f19bc	103	friend class TISRW;
etudiant12	0:96cf274f19bc	104	friend class TISRW_SS;
etudiant12	0:96cf274f19bc	105	friend class TBaseProcess;
etudiant12	0:96cf274f19bc	106	friend class TMutex;
etudiant12	0:96cf274f19bc	107	friend class TEventFlag;
etudiant12	0:96cf274f19bc	108	friend class TChannel;
etudiant12	0:96cf274f19bc	109	friend class TBaseMessage;
etudiant12	0:96cf274f19bc	110
etudiant12	0:96cf274f19bc	111	template<typename T, word size, class S> friend class channel;
etudiant12	0:96cf274f19bc	112	template<typename T> friend class message;
etudiant12	0:96cf274f19bc	113
etudiant12	0:96cf274f19bc	114	friend void Run();
etudiant12	0:96cf274f19bc	115	friend void WakeUpProcess(TBaseProcess& p);
etudiant12	0:96cf274f19bc	116	friend void ForceWakeUpProcess(TBaseProcess& p);
etudiant12	0:96cf274f19bc	117	friend inline bool IsProcessSleeping(const TBaseProcess& p);
etudiant12	0:96cf274f19bc	118	friend inline bool IsProcessSuspended(const TBaseProcess& p);
etudiant12	0:96cf274f19bc	119	friend inline dword GetTickCount();
etudiant12	0:96cf274f19bc	120
etudiant12	0:96cf274f19bc	121	//-----------------------------------------------------------
etudiant12	0:96cf274f19bc	122	//
etudiant12	0:96cf274f19bc	123	// Data
etudiant12	0:96cf274f19bc	124	//
etudiant12	0:96cf274f19bc	125	private:
etudiant12	0:96cf274f19bc	126	byte CurProcPriority;
etudiant12	0:96cf274f19bc	127	TProcessMap ReadyProcessMap;
etudiant12	0:96cf274f19bc	128	TBaseProcess* ProcessTable[scmRTOS_PROCESS_COUNT+1];
etudiant12	0:96cf274f19bc	129	volatile byte ISR_NestCount;
etudiant12	0:96cf274f19bc	130
etudiant12	0:96cf274f19bc	131	#if scmRTOS_CONTEXT_SWITCH_SCHEME == 1
etudiant12	0:96cf274f19bc	132	byte SchedProcPriority;
etudiant12	0:96cf274f19bc	133	#endif
etudiant12	0:96cf274f19bc	134
etudiant12	0:96cf274f19bc	135	#if scmRTOS_SYSTEM_TICKS_ENABLE == 1
etudiant12	0:96cf274f19bc	136	volatile dword SysTickCount;
etudiant12	0:96cf274f19bc	137	#endif
etudiant12	0:96cf274f19bc	138
etudiant12	0:96cf274f19bc	139	//-----------------------------------------------------------
etudiant12	0:96cf274f19bc	140	//
etudiant12	0:96cf274f19bc	141	// Functions
etudiant12	0:96cf274f19bc	142	//
etudiant12	0:96cf274f19bc	143	public:
etudiant12	0:96cf274f19bc	144	INLINE TKernel()
etudiant12	0:96cf274f19bc	145	: CurProcPriority(pr0)
etudiant12	0:96cf274f19bc	146	, ReadyProcessMap( (1 << (scmRTOS_PROCESS_COUNT + 1)) - 1) // set all processes ready
etudiant12	0:96cf274f19bc	147	, ISR_NestCount(0)
etudiant12	0:96cf274f19bc	148	{
etudiant12	0:96cf274f19bc	149	}
etudiant12	0:96cf274f19bc	150
etudiant12	0:96cf274f19bc	151	private:
etudiant12	0:96cf274f19bc	152	INLINE inline void RegisterProcess(TBaseProcess* const p);
etudiant12	0:96cf274f19bc	153
etudiant12	0:96cf274f19bc	154	void Sched();
etudiant12	0:96cf274f19bc	155	INLINE void Scheduler() { if(ISR_NestCount) return; else Sched(); }
etudiant12	0:96cf274f19bc	156	INLINE inline void SchedISR();
etudiant12	0:96cf274f19bc	157
etudiant12	0:96cf274f19bc	158	#if scmRTOS_CONTEXT_SWITCH_SCHEME == 1
etudiant12	0:96cf274f19bc	159	INLINE inline bool IsContextSwitchDone() const volatile;
etudiant12	0:96cf274f19bc	160	#endif
etudiant12	0:96cf274f19bc	161	INLINE void SetProcessReady (const byte pr) { TProcessMap PrioTag = GetPrioTag(pr); SetPrioTag( ReadyProcessMap, PrioTag); }
etudiant12	0:96cf274f19bc	162	INLINE void SetProcessUnready(const byte pr) { TProcessMap PrioTag = GetPrioTag(pr); ClrPrioTag( ReadyProcessMap, PrioTag); }
etudiant12	0:96cf274f19bc	163
etudiant12	0:96cf274f19bc	164	public:
etudiant12	0:96cf274f19bc	165	INLINE inline void SystemTimer();
etudiant12	0:96cf274f19bc	166	#if scmRTOS_CONTEXT_SWITCH_SCHEME == 1
etudiant12	0:96cf274f19bc	167	INLINE inline TStackItem* ContextSwitchHook(TStackItem* sp);
etudiant12	0:96cf274f19bc	168	#endif
etudiant12	0:96cf274f19bc	169
etudiant12	0:96cf274f19bc	170	}; // End of TKernel class definition
etudiant12	0:96cf274f19bc	171	//--------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	172	extern TKernel Kernel;
etudiant12	0:96cf274f19bc	173
etudiant12	0:96cf274f19bc	174	//--------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	175	//
etudiant12	0:96cf274f19bc	176	/// BaseProcess
etudiant12	0:96cf274f19bc	177	///
etudiant12	0:96cf274f19bc	178	/// Implements base class-type for application processes
etudiant12	0:96cf274f19bc	179	//
etudiant12	0:96cf274f19bc	180	// DESCRIPTION:
etudiant12	0:96cf274f19bc	181	//
etudiant12	0:96cf274f19bc	182	//
etudiant12	0:96cf274f19bc	183	class TBaseProcess
etudiant12	0:96cf274f19bc	184	{
etudiant12	0:96cf274f19bc	185	friend class TKernel;
etudiant12	0:96cf274f19bc	186	friend class TISRW;
etudiant12	0:96cf274f19bc	187	friend class TISRW_SS;
etudiant12	0:96cf274f19bc	188	friend class TEventFlag;
etudiant12	0:96cf274f19bc	189	friend class TMutex;
etudiant12	0:96cf274f19bc	190	friend class TBaseMessage;
etudiant12	0:96cf274f19bc	191
etudiant12	0:96cf274f19bc	192	template<typename T, word size, class S> friend class channel;
etudiant12	0:96cf274f19bc	193	template<typename T> friend class message;
etudiant12	0:96cf274f19bc	194
etudiant12	0:96cf274f19bc	195
etudiant12	0:96cf274f19bc	196	friend void Run();
etudiant12	0:96cf274f19bc	197	friend void WakeUpProcess(TBaseProcess& p);
etudiant12	0:96cf274f19bc	198	friend void ForceWakeUpProcess(TBaseProcess& p);
etudiant12	0:96cf274f19bc	199	friend bool IsProcessSleeping(const TBaseProcess& p);
etudiant12	0:96cf274f19bc	200	friend bool IsProcessSuspended(const TBaseProcess& p);
etudiant12	0:96cf274f19bc	201
etudiant12	0:96cf274f19bc	202	public:
etudiant12	0:96cf274f19bc	203	#if SEPARATE_RETURN_STACK == 0
etudiant12	0:96cf274f19bc	204	TBaseProcess( TStackItem* Stack, TPriority pr, void (*exec)() );
etudiant12	0:96cf274f19bc	205	#else
etudiant12	0:96cf274f19bc	206	TBaseProcess( TStackItem* Stack, TStackItem* RStack, TPriority pr, void (*exec)() );
etudiant12	0:96cf274f19bc	207	#endif
etudiant12	0:96cf274f19bc	208
etudiant12	0:96cf274f19bc	209	static void Sleep(TTimeout timeout = 0);
etudiant12	0:96cf274f19bc	210
etudiant12	0:96cf274f19bc	211	protected:
etudiant12	0:96cf274f19bc	212	TStackItem* StackPointer;
etudiant12	0:96cf274f19bc	213	TTimeout Timeout;
etudiant12	0:96cf274f19bc	214	TPriority Priority;
etudiant12	0:96cf274f19bc	215	};
etudiant12	0:96cf274f19bc	216	//--------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	217
etudiant12	0:96cf274f19bc	218	//--------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	219	//
etudiant12	0:96cf274f19bc	220	/// process
etudiant12	0:96cf274f19bc	221	///
etudiant12	0:96cf274f19bc	222	/// Implements template for application processes instantiation
etudiant12	0:96cf274f19bc	223	//
etudiant12	0:96cf274f19bc	224	// DESCRIPTION:
etudiant12	0:96cf274f19bc	225	//
etudiant12	0:96cf274f19bc	226	//
etudiant12	0:96cf274f19bc	227	#if SEPARATE_RETURN_STACK == 0
etudiant12	0:96cf274f19bc	228
etudiant12	0:96cf274f19bc	229	template<TPriority pr, word stack_size>
etudiant12	0:96cf274f19bc	230	class process : public TBaseProcess
etudiant12	0:96cf274f19bc	231	{
etudiant12	0:96cf274f19bc	232	public:
etudiant12	0:96cf274f19bc	233	INLINE_PROCESS_CTOR process();
etudiant12	0:96cf274f19bc	234
etudiant12	0:96cf274f19bc	235	OS_PROCESS static void Exec();
etudiant12	0:96cf274f19bc	236
etudiant12	0:96cf274f19bc	237	private:
etudiant12	0:96cf274f19bc	238	TStackItem Stack[stack_size/sizeof(TStackItem)];
etudiant12	0:96cf274f19bc	239	};
etudiant12	0:96cf274f19bc	240
etudiant12	0:96cf274f19bc	241	template<TPriority pr, word stack_size>
etudiant12	0:96cf274f19bc	242	OS::process<pr, stack_size>::process() : TBaseProcess( &Stack[stack_size/sizeof(TStackItem)]
etudiant12	0:96cf274f19bc	243	, pr
etudiant12	0:96cf274f19bc	244	, reinterpret_cast<void (*)()>(Exec) )
etudiant12	0:96cf274f19bc	245	{
etudiant12	0:96cf274f19bc	246	}
etudiant12	0:96cf274f19bc	247
etudiant12	0:96cf274f19bc	248	#else
etudiant12	0:96cf274f19bc	249
etudiant12	0:96cf274f19bc	250	template<TPriority pr, word stack_size, word rstack_size>
etudiant12	0:96cf274f19bc	251	class process : public TBaseProcess
etudiant12	0:96cf274f19bc	252	{
etudiant12	0:96cf274f19bc	253	public:
etudiant12	0:96cf274f19bc	254	INLINE_PROCESS_CTOR process();
etudiant12	0:96cf274f19bc	255
etudiant12	0:96cf274f19bc	256	OS_PROCESS static void Exec();
etudiant12	0:96cf274f19bc	257
etudiant12	0:96cf274f19bc	258	private:
etudiant12	0:96cf274f19bc	259	TStackItem Stack [stack_size/sizeof(TStackItem)];
etudiant12	0:96cf274f19bc	260	TStackItem RStack[rstack_size/sizeof(TStackItem)];
etudiant12	0:96cf274f19bc	261	};
etudiant12	0:96cf274f19bc	262
etudiant12	0:96cf274f19bc	263	template<TPriority pr, word stack_size, word rstack_size>
etudiant12	0:96cf274f19bc	264	process<pr, stack_size, rstack_size>::process() : TBaseProcess( &Stack[stack_size/sizeof(TStackItem)]
etudiant12	0:96cf274f19bc	265	, &RStack[rstack_size/sizeof(TStackItem)]
etudiant12	0:96cf274f19bc	266	, pr
etudiant12	0:96cf274f19bc	267	, reinterpret_cast<void (*)()>(Exec))
etudiant12	0:96cf274f19bc	268	{
etudiant12	0:96cf274f19bc	269	}
etudiant12	0:96cf274f19bc	270
etudiant12	0:96cf274f19bc	271	#endif
etudiant12	0:96cf274f19bc	272	//--------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	273
etudiant12	0:96cf274f19bc	274	//--------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	275	//
etudiant12	0:96cf274f19bc	276	// Miscellaneous
etudiant12	0:96cf274f19bc	277	//
etudiant12	0:96cf274f19bc	278	//
etudiant12	0:96cf274f19bc	279	INLINE inline void Run();
etudiant12	0:96cf274f19bc	280	INLINE inline void LockSystemTimer() { TCritSect cs; LOCK_SYSTEM_TIMER(); }
etudiant12	0:96cf274f19bc	281	INLINE inline void UnlockSystemTimer() { TCritSect cs; UNLOCK_SYSTEM_TIMER(); }
etudiant12	0:96cf274f19bc	282	void WakeUpProcess(TBaseProcess& p);
etudiant12	0:96cf274f19bc	283	void ForceWakeUpProcess(TBaseProcess& p);
etudiant12	0:96cf274f19bc	284	INLINE inline void Sleep(TTimeout t = 0) { TBaseProcess::Sleep(t); }
etudiant12	0:96cf274f19bc	285
etudiant12	0:96cf274f19bc	286	INLINE inline bool IsProcessSleeping(const TBaseProcess& p)
etudiant12	0:96cf274f19bc	287	{
etudiant12	0:96cf274f19bc	288	TCritSect cs;
etudiant12	0:96cf274f19bc	289	if(p.Timeout)
etudiant12	0:96cf274f19bc	290	return true;
etudiant12	0:96cf274f19bc	291	else
etudiant12	0:96cf274f19bc	292	return false;
etudiant12	0:96cf274f19bc	293	}
etudiant12	0:96cf274f19bc	294
etudiant12	0:96cf274f19bc	295	INLINE inline bool IsProcessSuspended(const TBaseProcess& p)
etudiant12	0:96cf274f19bc	296	{
etudiant12	0:96cf274f19bc	297	TCritSect cs;
etudiant12	0:96cf274f19bc	298	if(Kernel.ReadyProcessMap & GetPrioTag(p.Priority))
etudiant12	0:96cf274f19bc	299	return false;
etudiant12	0:96cf274f19bc	300	else
etudiant12	0:96cf274f19bc	301	return true;
etudiant12	0:96cf274f19bc	302	}
etudiant12	0:96cf274f19bc	303	//--------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	304
etudiant12	0:96cf274f19bc	305	#if scmRTOS_SYSTEM_TICKS_ENABLE == 1
etudiant12	0:96cf274f19bc	306	INLINE inline dword GetTickCount() { TCritSect cs; return Kernel.SysTickCount; }
etudiant12	0:96cf274f19bc	307	#endif
etudiant12	0:96cf274f19bc	308
etudiant12	0:96cf274f19bc	309	#if scmRTOS_SYSTIMER_HOOK_ENABLE == 1
etudiant12	0:96cf274f19bc	310	INLINE_SYS_TIMER_HOOK void SystemTimerUserHook();
etudiant12	0:96cf274f19bc	311	#endif
etudiant12	0:96cf274f19bc	312
etudiant12	0:96cf274f19bc	313	#if scmRTOS_CONTEXT_SWITCH_USER_HOOK_ENABLE == 1
etudiant12	0:96cf274f19bc	314	INLINE_CONTEXT_SWITCH_HOOK void ContextSwitchUserHook();
etudiant12	0:96cf274f19bc	315	#endif
etudiant12	0:96cf274f19bc	316
etudiant12	0:96cf274f19bc	317	}
etudiant12	0:96cf274f19bc	318	//------------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	319
etudiant12	0:96cf274f19bc	320	//------------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	321	//
etudiant12	0:96cf274f19bc	322	/// Register Process
etudiant12	0:96cf274f19bc	323	///
etudiant12	0:96cf274f19bc	324	/// Places pointer to process in kernel's process table
etudiant12	0:96cf274f19bc	325	//
etudiant12	0:96cf274f19bc	326	void OS::TKernel::RegisterProcess(OS::TBaseProcess* const p)
etudiant12	0:96cf274f19bc	327	{
etudiant12	0:96cf274f19bc	328	ProcessTable[p->Priority] = p;
etudiant12	0:96cf274f19bc	329	}
etudiant12	0:96cf274f19bc	330	//------------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	331	//
etudiant12	0:96cf274f19bc	332	/// System Timer Implementation
etudiant12	0:96cf274f19bc	333	///
etudiant12	0:96cf274f19bc	334	/// Performs process's timeouts checking and
etudiant12	0:96cf274f19bc	335	/// moving processes to ready-to-run state
etudiant12	0:96cf274f19bc	336	//
etudiant12	0:96cf274f19bc	337	void OS::TKernel::SystemTimer()
etudiant12	0:96cf274f19bc	338	{
etudiant12	0:96cf274f19bc	339	SYS_TIMER_CRIT_SECT();
etudiant12	0:96cf274f19bc	340	#if scmRTOS_SYSTEM_TICKS_ENABLE == 1
etudiant12	0:96cf274f19bc	341	SysTickCount++;
etudiant12	0:96cf274f19bc	342	#endif
etudiant12	0:96cf274f19bc	343
etudiant12	0:96cf274f19bc	344	#if scmRTOS_PRIORITY_ORDER == 0
etudiant12	0:96cf274f19bc	345	const byte BaseIndex = 0;
etudiant12	0:96cf274f19bc	346	#else
etudiant12	0:96cf274f19bc	347	const byte BaseIndex = 1;
etudiant12	0:96cf274f19bc	348	#endif
etudiant12	0:96cf274f19bc	349
etudiant12	0:96cf274f19bc	350	for(byte i = BaseIndex; i < (scmRTOS_PROCESS_COUNT + BaseIndex); i++)
etudiant12	0:96cf274f19bc	351	{
etudiant12	0:96cf274f19bc	352	TBaseProcess* p = ProcessTable[i];
etudiant12	0:96cf274f19bc	353
etudiant12	0:96cf274f19bc	354	if(p->Timeout > 0)
etudiant12	0:96cf274f19bc	355	{
etudiant12	0:96cf274f19bc	356	if(--p->Timeout == 0)
etudiant12	0:96cf274f19bc	357	{
etudiant12	0:96cf274f19bc	358	SetProcessReady(p->Priority);
etudiant12	0:96cf274f19bc	359	}
etudiant12	0:96cf274f19bc	360	}
etudiant12	0:96cf274f19bc	361	}
etudiant12	0:96cf274f19bc	362	}
etudiant12	0:96cf274f19bc	363	//------------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	364	//
etudiant12	0:96cf274f19bc	365	/// ISR optimized scheduler
etudiant12	0:96cf274f19bc	366	///
etudiant12	0:96cf274f19bc	367	/// !!! IMPORTANT: This function must be call from ISR services only !!!
etudiant12	0:96cf274f19bc	368	//
etudiant12	0:96cf274f19bc	369	//
etudiant12	0:96cf274f19bc	370	#if scmRTOS_CONTEXT_SWITCH_SCHEME == 0
etudiant12	0:96cf274f19bc	371	void OS::TKernel::SchedISR()
etudiant12	0:96cf274f19bc	372	{
etudiant12	0:96cf274f19bc	373	byte NextPrty = GetHighPriority(ReadyProcessMap);
etudiant12	0:96cf274f19bc	374	if(NextPrty != CurProcPriority)
etudiant12	0:96cf274f19bc	375	{
etudiant12	0:96cf274f19bc	376	TStackItem* Next_SP = ProcessTable[NextPrty]->StackPointer;
etudiant12	0:96cf274f19bc	377	TStackItem** Curr_SP_addr = &(ProcessTable[CurProcPriority]->StackPointer);
etudiant12	0:96cf274f19bc	378	CurProcPriority = NextPrty;
etudiant12	0:96cf274f19bc	379	OS_ContextSwitcher(Curr_SP_addr, Next_SP);
etudiant12	0:96cf274f19bc	380	}
etudiant12	0:96cf274f19bc	381	}
etudiant12	0:96cf274f19bc	382	#else
etudiant12	0:96cf274f19bc	383	void OS::TKernel::SchedISR()
etudiant12	0:96cf274f19bc	384	{
etudiant12	0:96cf274f19bc	385	byte NextPrty = GetHighPriority(ReadyProcessMap);
etudiant12	0:96cf274f19bc	386	if(NextPrty != CurProcPriority)
etudiant12	0:96cf274f19bc	387	{
etudiant12	0:96cf274f19bc	388	SchedProcPriority = NextPrty;
etudiant12	0:96cf274f19bc	389	RaiseContextSwitch();
etudiant12	0:96cf274f19bc	390	}
etudiant12	0:96cf274f19bc	391	}
etudiant12	0:96cf274f19bc	392	//------------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	393	bool OS::TKernel::IsContextSwitchDone() const volatile
etudiant12	0:96cf274f19bc	394	{
etudiant12	0:96cf274f19bc	395	byte cur = CurProcPriority; ///< reading to temporary vars is performed due to
etudiant12	0:96cf274f19bc	396	byte sched = SchedProcPriority; ///< suppress warning about order of volatile access
etudiant12	0:96cf274f19bc	397	return cur == sched;
etudiant12	0:96cf274f19bc	398	}
etudiant12	0:96cf274f19bc	399	//------------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	400	TStackItem* OS::TKernel::ContextSwitchHook(TStackItem* sp)
etudiant12	0:96cf274f19bc	401	{
etudiant12	0:96cf274f19bc	402	ProcessTable[CurProcPriority]->StackPointer = sp;
etudiant12	0:96cf274f19bc	403	sp = ProcessTable[SchedProcPriority]->StackPointer;
etudiant12	0:96cf274f19bc	404
etudiant12	0:96cf274f19bc	405	#if scmRTOS_CONTEXT_SWITCH_USER_HOOK_ENABLE == 1
etudiant12	0:96cf274f19bc	406	ContextSwitchUserHook();
etudiant12	0:96cf274f19bc	407	#endif
etudiant12	0:96cf274f19bc	408
etudiant12	0:96cf274f19bc	409	CurProcPriority = SchedProcPriority;
etudiant12	0:96cf274f19bc	410	return sp;
etudiant12	0:96cf274f19bc	411	}
etudiant12	0:96cf274f19bc	412	//------------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	413	#endif // scmRTOS_CONTEXT_SWITCH_SCHEME
etudiant12	0:96cf274f19bc	414
etudiant12	0:96cf274f19bc	415	//-----------------------------------------------------------------------------
etudiant12	0:96cf274f19bc	416	/// Start Operation
etudiant12	0:96cf274f19bc	417	INLINE inline void OS::Run()
etudiant12	0:96cf274f19bc	418	{
etudiant12	0:96cf274f19bc	419	TStackItem* sp = Kernel.ProcessTable[pr0]->StackPointer;
etudiant12	0:96cf274f19bc	420	OS_Start(sp);
etudiant12	0:96cf274f19bc	421	}
etudiant12	0:96cf274f19bc	422
etudiant12	0:96cf274f19bc	423	#include <OS_Services.h>
etudiant12	0:96cf274f19bc	424
etudiant12	0:96cf274f19bc	425	#endif // OS_KERNEL_H
etudiant12	0:96cf274f19bc	426

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	23 May 2011
Imports:	11
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	4
Followers:	3

scmRTOS/Common/OS_Kernel.h@0:96cf274f19bc, 2011-05-23 (annotated)

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