1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/ProcrContext.c	Wed Jun 22 16:12:27 2011 +0200
     1.3 @@ -0,0 +1,65 @@
     1.4 +/*
     1.5 + * This File contains all hardware dependent C code.
     1.6 + */
     1.7 +
     1.8 +
     1.9 +#include "VMS.h"
    1.10 +
    1.11 +/*Create stack, then create __cdecl structure on it and put initialData and
    1.12 + * pointer to the new structure instance into the parameter positions on
    1.13 + * the stack
    1.14 + *Then put function pointer into nextInstrPt -- the stack is setup in std
    1.15 + * call structure, so jumping to function ptr is same as a GCC generated
    1.16 + * function call
    1.17 + *No need to save registers on old stack frame, because there's no old
    1.18 + * animator state to return to --
    1.19 + *
    1.20 + */
    1.21 +inline VirtProcr *
    1.22 +create_procr_helper( VirtProcr *newPr,       VirtProcrFnPtr  fnPtr,
    1.23 +                     void      *initialData, void           *stackLocs )
    1.24 + {
    1.25 +   void  *stackPtr;
    1.26 +
    1.27 +   newPr->startOfStack = stackLocs;
    1.28 +   newPr->procrID      = _VMSMasterEnv->numProcrsCreated++;
    1.29 +   newPr->initialData  = initialData;
    1.30 +   newPr->requests     = NULL;
    1.31 +   newPr->schedSlot    = NULL;
    1.32 +
    1.33 +   /*
    1.34 +    * Hardware dependent part           
    1.35 +    */
    1.36 +   //instead of calling the function directly, call a wrapper function to fetch
    1.37 +   //arguments from stack
    1.38 +   newPr->nextInstrPt  = (VirtProcrFnPtr)&startVirtProcrFn;
    1.39 +   
    1.40 +    //fnPtr takes two params -- void *initData & void *animProcr
    1.41 +    //alloc stack locations, make stackPtr be the highest addr minus room
    1.42 +    // for 2 params + return addr.  Return addr (NULL) is in loc pointed to
    1.43 +    // by stackPtr, initData at stackPtr + 8 bytes, animatingPr just above
    1.44 +   stackPtr = ( (void *)stackLocs + VIRT_PROCR_STACK_SIZE - 4*sizeof(void*));
    1.45 +   
    1.46 +      //setup __cdecl on stack -- coreloop will switch to stackPtr before jmp
    1.47 +   *((VirtProcr**)stackPtr + 2 ) = newPr; //rightmost param
    1.48 +   *((void**)stackPtr + 1 ) = initialData;  //next  param to left
    1.49 +   *((void**)stackPtr) = (void*)fnPtr;
    1.50 +   
    1.51 +   /*
    1.52 +    * end of Hardware dependent part           
    1.53 +    */
    1.54 +   
    1.55 +   newPr->stackPtr = stackPtr; //core loop will switch to this, then
    1.56 +   newPr->framePtr = stackPtr; //suspend loop will save new stack & frame ptr
    1.57 +
    1.58 +   //============================= MEASUREMENT STUFF ========================
    1.59 +   #ifdef STATS__TURN_ON_PROBES
    1.60 +   struct timeval timeStamp;
    1.61 +   gettimeofday( &(timeStamp), NULL);
    1.62 +   newPr->createPtInSecs = timeStamp.tv_sec +(timeStamp.tv_usec/1000000.0) -
    1.63 +                                               _VMSMasterEnv->createPtInSecs;
    1.64 +   #endif
    1.65 +   //========================================================================
    1.66 +
    1.67 +   return newPr;
    1.68 + }
    1.69 \ No newline at end of file