Sistemati tutt gli esempi relativi alla memoria condivisa, usando le

[gapil.git] / sources / DirMonitor.c

diff --git a/sources/DirMonitor.c b/sources/DirMonitor.c
index c9b92f43ab2bf8245a8ff5a2a1d6c7bdd311a4d0..8c7335233000a3e5fe0f1c3c9c816c27c908e768 100644 (file)
--- a/sources/DirMonitor.c
+++ b/sources/DirMonitor.c
@@ -25,7 +25,7 @@
  *
  * Author: S. Piccardi Jan. 2003
  *
- * $Id: DirMonitor.c,v 1.5 2003/01/12 00:24:28 piccardi Exp $
+ * $Id: DirMonitor.c,v 1.6 2003/02/26 21:37:36 piccardi Exp $
  *
  *****************************************************************************/
 #include <sys/types.h>
@@ -55,13 +55,12 @@ struct DirProp {
     int tot_char;    
     int tot_sock;
 } *shmptr;
-int shmid; 
+key_t key;
 int mutex;
 
 int main(int argc, char *argv[]) 
 {
     int i, pause = 10;
-    key_t key;
     /*
      * Input section: decode command line parameters 
      * Use getopt function
@@ -106,15 +105,11 @@ int main(int argc, char *argv[])
     Signal(SIGINT, HandSIGTERM);
     Signal(SIGQUIT, HandSIGTERM);
     key = ftok("~/gapil/sources/DirMonitor.c", 1);  /* define a key, use dir */
-    shmid = shmget(key, 4096, IPC_CREAT|0666);        /* get a shared memory */
-    if (shmid < 0) {
+    shmptr = ShmCreate(key, 4096, 0666, 0);   /* get a shared memory segment */
+    if (!shmptr) {
        perror("Cannot create shared memory");
        exit(1);
     }
-    if ( (shmptr = shmat(shmid, NULL, 0)) == NULL ) {   /* attach to process */
-       perror("Cannot attach segment");
-       exit(1);
-    }
     if ((mutex = MutexCreate(key)) == -1) {                   /* get a Mutex */
        perror("Cannot create mutex");
        exit(1);
@@ -164,14 +159,7 @@ void usage(void) {
 void HandSIGTERM(int signo) {
     MutexLock(mutex);
     debug("Terminated by %s\n", strsignal(signo));
-    if (shmdt(shmptr)) {
-       perror("Error detaching shared memory");
-       exit(1);
-    }
-    if (shmctl(shmid, IPC_RMID, NULL)) {
-       perror("Cannot remove shared memory segment");
-       exit(1);
-    }
+    ShmRemove(key, shmptr);
     MutexRemove(mutex);
     exit(0);
 }