/* Release memory from errlist, release semaphore
*/
void ReleaseErrorList(void){
pStrErrList el;
if( err_sem_init ){
if( errlist && !LockSem(&err_sem) ){
while(errlist){
if(errlist->text) free(errlist->text);
el = errlist;
errlist=errlist->next;
free(el);
}
ReleaseSem(&err_sem);
}
err_sem_init=0;
CleanSem(&err_sem);
}
}
void rel_grow_handles(int nh)
{ LONG addfh=0;
static ULONG curmaxfh=0;
LockSem(&fhsem);
if (curmaxfh == 0)
{ if (DosSetRelMaxFH(&addfh, &curmaxfh))
{ Log(1, "Cannot DosSetRelMaxFH");
return;
}
}
#ifdef __WATCOMC__
if ((addfh=_grow_handles((int)(curmaxfh += nh))) < curmaxfh)
#else
addfh=nh;
if (DosSetRelMaxFH(&addfh, &curmaxfh))
#endif
Log(1, "Cannot grow handles to %ld (now %ld): %s", curmaxfh, addfh, strerror(errno));
else
Log(6, "Set MaxFH to %ld (res %ld)", curmaxfh, addfh);
ReleaseSem(&fhsem);
}
/* Return error message from errlist
*/
const char *errorfromlist(int err){
pStrErrList el, sel;
const char *errmess="";
for( sel=el=errlist; el; el=el->next )
if( el->code==err )
return el->text;
if(!err_sem_init){ err_sem_init=1; InitSem(&err_sem); }
if( !LockSem(&err_sem) ){
if(sel!=errlist) /* List changed, check again */
for( el=errlist; el && (el!=sel); el=el->next )
if( el->code==err ){
errmess = el->text;
goto skip_newerrortolist;
}
errmess = newerrortolist(err);
skip_newerrortolist:
ReleaseSem(&err_sem);
}
return errmess;
}
int branch (register void (*F) (void *), register void *arg, register size_t size)
{
register int rc;
char *tmp;
/* We make our own copy of arg for the child as the parent may destroy it
* before the child finish to use it. It's not really needed with fork()
* but we do not want extra checks for HAVE_FORK before free(arg) in the
* child. */
if (size > 0)
{
if ((tmp = malloc (size)) == NULL)
{
Log (1, "malloc failed");
return -1;
}
else
{
memcpy (tmp, arg, size);
arg = tmp;
}
}
else
arg = 0;
#if defined(HAVE_FORK) && !defined(HAVE_THREADS) && !defined(AMIGA) && !defined(DEBUGCHILD)
again:
if (!(rc = fork ()))
{
/* new process */
mypid = getpid();
F (arg);
exit (0);
}
else if (rc < 0)
{
if (errno == EINTR) goto again;
/* parent, error */
Log (1, "fork: %s", strerror (errno));
}
else
{
/* parent, free our copy of args */
xfree (arg);
}
#endif
#if defined(HAVE_THREADS) && !defined(DEBUGCHILD)
#ifdef WITH_PTHREADS
{ thread_args_t args;
pthread_t tid;
args.F = F;
args.args = arg;
InitSem(&args.mutex);
LockSem(&args.mutex);
if ((rc = pthread_create (&tid, NULL, thread_start, &args)) != 0)
{
Log (1, "pthread_create: %s", strerror (rc));
rc = -1;
}
else
{
LockSem(&args.mutex); /* wait until thread releases this mutex */
#ifdef HAVE_GETTID
rc = args.tid;
#else
rc = (int)(0xffff & (long int)tid);
#endif
}
ReleaseSem(&args.mutex);
CleanSem(&args.mutex);
}
#else
if ((rc = BEGINTHREAD (F, STACKSIZE, arg)) < 0)
Log (1, "_beginthread: %s", strerror (errno));
#endif
#endif
#ifdef AMIGA
/* this is rather bizzare. this function pretends to be a fork and behaves
* like one, but actually it's a kind of a thread. so we'll need semaphores */
if (!(rc = ix_vfork ()))
{
vfork_setup_child ();
ix_vfork_resume ();
F (arg);
exit (0);
}
else if (rc < 0)
{
Log (1, "ix_vfork: %s", strerror (errno));
}
#endif
#if defined(DOS) || defined(DEBUGCHILD)
rc = 0;
F (arg);
#endif
return rc;
}
/*
* Run one client loop. Return -1 to exit
*/
static int do_client(BINKD_CONFIG *config)
{
FTN_NODE *r;
int pid;
if (!config->q_present)
{
q_free (SCAN_LISTED, config);
if (config->printq)
Log (-1, "scan\r");
q_scan (SCAN_LISTED, config);
config->q_present = 1;
if (config->printq)
{
LockSem (&lsem);
q_list (stderr, SCAN_LISTED, config);
ReleaseSem (&lsem);
Log (-1, "idle\r");
}
}
if (n_clients < config->max_clients)
{
if ((r = q_next_node (config)) != 0)
{
struct call_args args;
if (!bsy_test (&r->fa, F_BSY, config) ||
!bsy_test (&r->fa, F_CSY, config))
{
char szDestAddr[FTN_ADDR_SZ + 1];
ftnaddress_to_str (szDestAddr, &r->fa);
Log (4, "%s busy, skipping", szDestAddr);
return 0; /* go to the next node */
}
rel_grow_handles (6);
threadsafe(++n_clients);
lock_config_structure(config);
args.node = r;
args.config = config;
if ((pid = branch (call, &args, sizeof (args))) < 0)
{
unlock_config_structure(config, 0);
rel_grow_handles (-6);
threadsafe(--n_clients);
PostSem(&eothread);
Log (1, "cannot branch out");
unblocksig();
SLEEP(1);
blocksig();
check_child(&n_clients);
}
#if !defined(DEBUGCHILD)
else
{
Log (5, "started client #%i, id=%i", n_clients, pid);
#if defined(HAVE_FORK) && !defined(AMIGA)
unlock_config_structure(config, 0); /* Forked child has own copy */
#endif
}
#endif
}
else
{
if (poll_flag)
{
if (n_clients <= 0 && q_not_empty (config) == 0)
{
Log (4, "the queue is empty, quitting...");
return -1;
}
} else
config->q_present = 0;
unblocksig();
SLEEP (config->rescan_delay);
blocksig();
check_child(&n_clients);
}
}
else
{
unblocksig();
SLEEP (config->call_delay);
blocksig();
check_child(&n_clients);
}
return 0;
}
