diff options
Diffstat (limited to 'aufgabe4/queue.c')
| -rw-r--r-- | aufgabe4/queue.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/aufgabe4/queue.c b/aufgabe4/queue.c index 62a888c..9bf2725 100644 --- a/aufgabe4/queue.c +++ b/aufgabe4/queue.c @@ -20,7 +20,6 @@ static const int queue_size = sizeof(struct queueheader) + (sizeof(struct msg) * 255); -static int fd; static uint8_t *shm; static struct queueheader *shmheader; static struct msg *shmdata; @@ -55,6 +54,7 @@ static void unlock() { * */ void queue_init() { + int fd; int flags = O_RDWR | O_CREAT | O_TRUNC; if ((fd = shm_open("/bts-sem", flags, S_IREAD | S_IWRITE)) == -1) { perror("shm_open"); @@ -69,10 +69,13 @@ void queue_init() { exit(EXIT_FAILURE); } + close(fd); + shmheader = (struct queueheader*)shm; shmdata = (struct msg*)(shm + sizeof(struct queueheader)); - shmheader->cur = 0; + /* Speicher mit 0 initialisieren */ + memset(shmheader, 0, sizeof(struct queueheader)); shmdata->dir = D_INVALID; /* Semaphor initialisieren */ |