port.h

这是状态机的一个框架结构的例子,可以作为状态机的基本架构

/******************************************************************** 
 * Quantum Framework RTK32 port declarations (C version)
 * (c) Copyright 2001, Miro Samek, Palo Alto, CA
 * All Rights Reserved
 *******************************************************************/
#ifndef port_h
#define port_h

#include "qf_rtk32.h"
#include "qfpkg.h"

/* RTK32-specific critical section operations */
//#define QF_PROTECT()          RTKDisableInterrupts()
//#define QF_UNPROTECT()        RTKEnableInterrupts()
#define QF_PROTECT()          __asm{cli}
#define QF_UNPROTECT()        __asm{sti}
#define QF_ISR_PROTECT()
#define QF_ISR_UNPROTECT()

/* RTK32-specific event pool */
CLASS(QEPool)                       /* Fixed-block-size Event Pool */
   RTKMemPool RTKPool__;                        /* RTK memory pool */
   unsigned short evtSize__;              /* event size (in bytes) */   
METHODS
END_CLASS

/* RTK32-specific event pool operations */
#define QF_EPOOL              QEPool
#define QF_EPOOL_INIT(p_, poolSto_, nEvts_, evtSize_) \
   if (1) { \
      ASSERT(poolSto_ == 0); \
      (p_)->evtSize__ = evtSize_; \
      RTKAllocMemPool(&(p_)->RTKPool__, evtSize_, nEvts_); \
   } else
#define QF_EPOOL_GET(p_, e_) \
   ((e_) = (QEvent *)RTKGetBuffer(&(p_)->RTKPool__))
#define QF_EPOOL_PUT(p_, e_) \
   RTKFreeBuffer(&(p_)->RTKPool__, e_);

         /* the following constant may be bumped up to 15 (inclusive)
          * before redesign of algorithms is necessary
          */ 
enum { QF_MAX_ACTIVE = 8 };

#endif                                                   /* port_h */