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Initial semaphore test

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This commit is contained in:
zenon 2018-06-06 19:22:25 +02:00
parent 8dbd116b88
commit 49357d1173
1 changed files with 8 additions and 9 deletions
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13
supervisor.c
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@ -29,9 +29,6 @@ void usage(void)
void initCircBuf() void initCircBuf()
{ {
shared->validItems = 0;
shared->head = 0;
shared->tail = 0;
shared->quit = 0; shared->quit = 0;
for (int i = 0; i < MAX_ITEMS; i++) { for (int i = 0; i < MAX_ITEMS; i++) {
shared->data[i] = 0; shared->data[i] = 0;
@ -47,16 +44,16 @@ int isEmpty()
return 0; return 0;
} }
int getItem() int getSolution(sem_t sUsedSpace, sem_t sFreeSpace, int *solution)
{ {
if (isEmpty()) sem_wait(&sUsedSpace);
return -1;
int value; int value;
value = shared->data[shared->head]; value = shared->data[shared->head];
shared->head = (shared->head + 1) % MAX_ITEMS; shared->head = (shared->head + 1) % MAX_ITEMS;
shared->validItems--;
sem_post(&sFreeSpace);
return value; return value;
} }
@ -95,6 +92,8 @@ int main(int argc, char *argv[])
initCircBuf(); initCircBuf();
while (quit == 0) { while (quit == 0) {
int solution[MAX_ITEMS] = {-1};
getSolution(*sUsedSpace, *sFreeSpace, solution);
} }