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view ProcrContext.c @ 135:0b49fd35afc1
distributed free working
-app sends a VMSSemReqst to his Master which send a request to a different Master
-Master send the request directly
-The request structure is freed by the sender, when the request was handled
There are still problems on shutdown. The shutdownVPs are all allocated by one Master which is likly to be terminated
| author | Merten Sach <msach@mailbox.tu-berlin.de> |
|---|---|
| date | Fri, 16 Sep 2011 20:08:28 +0200 |
| parents | 521c75d64cef |
| children |
line source
1 /*
2 * This File contains all hardware dependent C code.
3 */
6 #include "VMS.h"
7 #include "ProcrContext.h"
9 /*Create stack, then create __cdecl structure on it and put initialData and
10 * pointer to the new structure instance into the parameter positions on
11 * the stack
12 *Then put function pointer into nextInstrPt -- the stack is setup in std
13 * call structure, so jumping to function ptr is same as a GCC generated
14 * function call
15 *No need to save registers on old stack frame, because there's no old
16 * animator state to return to --
17 *
18 */
19 inline VirtProcr *
20 create_procr_helper( VirtProcr *newPr, VirtProcrFnPtr fnPtr,
21 void *initialData, void *stackLocs )
22 {
23 void *stackPtr;
25 newPr->startOfStack = stackLocs;
26 newPr->procrID = _VMSMasterEnv->numProcrsCreated++;
27 newPr->initialData = initialData;
28 newPr->requests = NULL;
29 newPr->schedSlot = NULL;
31 /*
32 * Hardware dependent part
33 */
34 //instead of calling the function directly, call a wrapper function to fetch
35 //arguments from stack
36 newPr->nextInstrPt = (VirtProcrFnPtr)&startVirtProcrFn;
38 //fnPtr takes two params -- void *initData & void *animProcr
39 //alloc stack locations, make stackPtr be the highest addr minus room
40 // for 2 params + return addr. Return addr (NULL) is in loc pointed to
41 // by stackPtr, initData at stackPtr + 8 bytes, animatingPr just above
42 stackPtr = ( (void *)stackLocs + VIRT_PROCR_STACK_SIZE - 4*sizeof(void*));
44 //setup __cdecl on stack -- coreloop will switch to stackPtr before jmp
45 *((VirtProcr**)stackPtr + 2 ) = newPr; //rightmost param
46 *((void**)stackPtr + 1 ) = initialData; //next param to left
47 *((void**)stackPtr) = (void*)fnPtr;
49 /*
50 * end of Hardware dependent part
51 */
53 newPr->stackPtr = stackPtr; //core loop will switch to this, then
54 newPr->framePtr = stackPtr; //suspend loop will save new stack & frame ptr
56 //============================= MEASUREMENT STUFF ========================
57 #ifdef STATS__TURN_ON_PROBES
58 //struct timeval timeStamp;
59 //gettimeofday( &(timeStamp), NULL);
60 //newPr->createPtInSecs = timeStamp.tv_sec +(timeStamp.tv_usec/1000000.0) -
61 // _VMSMasterEnv->createPtInSecs;
62 #endif
63 //========================================================================
65 return newPr;
66 }