[SR-Users] [Fwd: Re: Deleting the expired contacts using the Rtimer module]

he array values that we are modifying and the function that we call periodically are from our module . to exemplify i have put the code below .our requirement is that we want to delete the expired contacts without relying on usrloc module as "we have not used any DB for contact storage" but developed our own module for storing them in a file.even we had installed the SIGALRM handler in our module for decrementing the contacts but the values of array (that stores the expires) elements were zero. we thought of workaround to store the expires values to file and decrement them periodically. but frequent I/O is very consuming. whats the solution for deleting the expired contacts . #define DB_PATH "/usr/local/etc/kamailio/dbtext/syntel" #define DB_PATH1 "/usr/local/etc/kamailio/dbtext/temp" #define MAX_BUFFER 128 #define MAX_USERS 128 typedef struct { int max_bindings; int syntel_index; int expires[8]; char ip_addr[8][16]; } Syntel_users; Syntel_users syntel_database[16]={{0}}; //this is function used for storing the contacts int write_to_file (char *uri, char *user, int locator,int expires) { int Retval = 0; int fd; int bytes; char ip[13]; strncpy (ip, &uri[9], 12); ip[12] = '\0'; fd = open (DB_PATH, O_CREAT | O_RDWR | O_APPEND, 0777); if (syntel_database[locator].max_bindings < 8) { strcpy (syntel_database[locator].ip_addr[syntel_database[locator].max_bindings], uri); syntel_database[locator].expires[syntel_database[locator].max_bindings]=expires; syntel_database[locator].max_bindings++; bytes = write (fd, uri, strlen (uri)); Retval = 1; } return Retval; } //AND THIS IS FUNCTION WE CALL FROM kamailio.conf WITH RTIMER MODULE AFTER INTERVAL OF 1 SECOND. int syntel_delete (void) { int counter; int j; for (counter = 0; counter < 16; counter++) { for (j = 0; j < syntel_database[counter].max_bindings; j++) { if(syntel_database[counter].expires[j]<=0) { memset(syntel_database[counter].ip_addr[j],0,strlen(syntel_database[counter].ip_addr[j])); syntel_database[counter].max_bindings--; } else syntel_database[counter].expires[j]--; } } return 0; } BUT WHAT THIS FUNCTION GETS IS ZERO VALUES FOR EXPIRES AND NOT MODIFIED IN SYNTEL_WRITE_TO_FILE HOW TO DECREMENT THESE VALUES PERIODICALLY THEN ??