| 20,11 → 20,11 |
|---|
| |
| /** |
| ------------ |
| CVS : $Id: cbs.c,v 1.4 2003-01-07 17:07:50 pj Exp $ |
| CVS : $Id: cbs.c,v 1.5 2003-05-05 07:31:43 pj Exp $ |
| |
| File: $File$ |
| Revision: $Revision: 1.4 $ |
| Last update: $Date: 2003-01-07 17:07:50 $ |
| Revision: $Revision: 1.5 $ |
| Last update: $Date: 2003-05-05 07:31:43 $ |
| ------------ |
| |
| This file contains the aperiodic server CBS (Total Bandwidth Server) |
| 259,17 → 259,12 |
|---|
| { |
| CBS_level_des *lev = (CBS_level_des *)(level_table[l]); |
| |
| if (lev->flags & CBS_FAILED_GUARANTEE) { |
| *freebandwidth = 0; |
| return 0; |
| if (*freebandwidth >= lev->U) { |
| *freebandwidth -= lev->U; |
| return 1; |
| } |
| else |
| if (*freebandwidth >= lev->U) { |
| *freebandwidth -= lev->U; |
| return 1; |
| } |
| else |
| return 0; |
| return 0; |
| } |
| |
| static int CBS_public_create(LEVEL l, PID p, TASK_MODEL *m) |
| 284,6 → 279,17 |
|---|
| |
| soft = (SOFT_TASK_MODEL *)m; |
| |
| if (lev->flags & CBS_ENABLE_GUARANTEE) { |
| bandwidth_t b; |
| b = (MAX_BANDWIDTH / soft->period) * soft->met; |
| |
| /* really update lev->U, checking an overflow... */ |
| if (MAX_BANDWIDTH - lev->U > b) |
| lev->U += b; |
| else |
| return -1; |
| } |
| |
| /* Enable wcet check */ |
| proc_table[p].avail_time = soft->met; |
| proc_table[p].wcet = soft->met; |
| 301,21 → 307,6 |
|---|
| if (soft->arrivals == SAVE_ARRIVALS) |
| lev->flag[p] |= CBS_SAVE_ARRIVALS; |
| |
| /* update the bandwidth... */ |
| if (lev->flags & CBS_ENABLE_GUARANTEE) { |
| bandwidth_t b; |
| b = (MAX_BANDWIDTH / soft->period) * soft->met; |
| |
| /* really update lev->U, checking an overflow... */ |
| if (MAX_BANDWIDTH - lev->U > b) |
| lev->U += b; |
| else |
| /* The task can NOT be guaranteed (U>MAX_BANDWIDTH)... |
| (see EDF.c) */ |
| lev->flags |= CBS_FAILED_GUARANTEE; |
| } |
| |
| |
| return 0; /* OK, also if the task cannot be guaranteed... */ |
| } |
| |
| 322,15 → 313,13 |
|---|
| static void CBS_public_detach(LEVEL l, PID p) |
| { |
| /* the CBS level doesn't introduce any dinamic allocated new field. |
| we have only to reset the NO_GUARANTEE FIELD and decrement the allocated |
| bandwidth */ |
| we have only to decrement the allocated bandwidth */ |
| |
| CBS_level_des *lev = (CBS_level_des *)(level_table[l]); |
| |
| if (lev->flags & CBS_FAILED_GUARANTEE) |
| lev->flags &= ~CBS_FAILED_GUARANTEE; |
| else |
| if (lev->flags & CBS_ENABLE_GUARANTEE) { |
| lev->U -= (MAX_BANDWIDTH / lev->period[p]) * proc_table[p].wcet; |
| } |
| } |
| |
| static int CBS_public_eligible(LEVEL l, PID p) |
| 566,7 → 555,7 |
|---|
| |
| lev->scheduling_level = master; |
| |
| lev->flags = flags & 0x01; |
| lev->flags = flags; |
| |
| return l; |
| } |