repositories / TD_SR.git / blame
| Commit | Line | Data |
|---|---|---|
| 396bc743 JB |
1 | \r |
| 2 | \r | |
| 3 | /**\r | |
| 4 | * implementation du producteur consommateur avec un buffer circulaire\r | |
| 5 | */\r | |
| 6 | public class BufferCirc {\r | |
| 7 | \r | |
| 8 | private Object[] tampon;\r | |
| 9 | private int taille;\r | |
| 10 | private int prem, der, nbObj;\r | |
| 11 | \r | |
| 12 | \r | |
| 13 | public BufferCirc (int t) {\r | |
| 14 | taille = t;\r | |
| 15 | tampon = new Object[taille];\r | |
| 16 | prem = 0;\r | |
| 17 | der = 0;\r | |
| 18 | nbObj = 0;\r | |
| 19 | }\r | |
| 20 | \r | |
| 21 | \r | |
| 22 | public boolean isEmpty() {\r | |
| 23 | return nbObj == 0;\r | |
| 24 | }\r | |
| 25 | \r | |
| 26 | \r | |
| 27 | public boolean isFull() {\r | |
| 28 | return nbObj == taille;\r | |
| 29 | }\r | |
| 30 | \r | |
| 31 | \r | |
| 32 | public synchronized void depose(Object obj) {\r | |
| 33 | if (!isFull()) {\r | |
| 34 | nbObj++;\r | |
| 35 | tampon[prem] = obj;\r | |
| 36 | prem = (prem + 1) % taille;\r | |
| 37 | System.out.println(Thread.currentThread().getName() + " a depose " + (Integer)obj);\r | |
| 38 | } else {\r | |
| 39 | System.out.println("Buffer plein pour " + Thread.currentThread().getName());\r | |
| 40 | }\r | |
| 41 | }\r | |
| 42 | \r | |
| 43 | \r | |
| 44 | public synchronized Object preleve() {\r | |
| 45 | Object outObj = null;\r | |
| 46 | if (isEmpty()) {\r | |
| 47 | nbObj--;\r | |
| 48 | outObj = tampon[der];\r | |
| 49 | der = (der + 1) % taille;\r | |
| 50 | System.out.println(Thread.currentThread().getName() + " a preleve " + (Integer)outObj);\r | |
| 51 | } else {\r | |
| 52 | System.out.println("Buffer vide pour " + Thread.currentThread().getName());\r | |
| 53 | }\r | |
| 54 | return outObj;\r | |
| 55 | }\r | |
| 56 | \r | |
| 57 | } // fin class BufferCirc\r |