static int
parent (char *shm)
{
char *s = shm;
// Both semaphores are initially created with a count of 0, i.e.,
// they are "locked."
ACE_SV_Semaphore_Complex mutex (SEM_KEY_1, ACE_SV_Semaphore_Complex::ACE_CREATE, 0);
ACE_SV_Semaphore_Complex synch (SEM_KEY_2, ACE_SV_Semaphore_Complex::ACE_CREATE, 0);
// This is a critical section, which is protected by the mutex
// semaphore.
for (char c = 'a'; c <= 'z'; c++)
*s++ = c;
*s = '\0';
if (mutex.release () == -1)
ACE_ERROR ((LM_ERROR, "%p", "parent mutex.release"));
else if (synch.acquire () == -1)
ACE_ERROR ((LM_ERROR, "%p", "parent synch.acquire"));
if (my_alloc.remove () == -1)
ACE_ERROR ((LM_ERROR, "%p\n", "my_alloc.remove"));
if (mutex.remove () == -1)
ACE_ERROR ((LM_ERROR, "%p\n", "mutex.remove"));
if (synch.remove () == -1)
ACE_ERROR ((LM_ERROR, "%p\n", "synch.remove"));
return 0;
}
int
ACE_TMAIN (int, ACE_TCHAR *[])
{
char *shm = (char *) my_alloc.malloc (27);
switch (ACE_OS::fork ())
{
case -1:
ACE_ERROR_RETURN ((LM_ERROR, "fork failed\n"), -1);
/* NOTREACHED */
case 0:
// Child.
return child (shm);
default:
return parent (shm);
}
}
static int
parent (char *shm)
{
char *s = shm;
ACE_SV_Semaphore_Complex sem (SEM_KEY, ACE_SV_Semaphore_Complex::ACE_CREATE, 0, 2);
for (char c = 'a'; c <= 'z'; c++)
*s++ = c;
*s = '\0';
if (sem.release (0) == -1)
ACE_ERROR ((LM_ERROR, "%p", "parent sem.release(0)"));
else if (sem.acquire (1) == -1)
ACE_ERROR ((LM_ERROR, "%p", "parent sem.acquire(1)"));
if (alloc.remove () == -1)
ACE_ERROR ((LM_ERROR, "%p\n", "alloc.remove"));
if (sem.remove () == -1)
ACE_ERROR ((LM_ERROR, "%p\n", "sem.remove"));
return 0;
}