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// Illustrates the use of the Semaphore_Complex class. Note that it
// $Id$
// doesn't matter whether the parent or the child creates the
// semaphore since Semaphore_Complex will correctly serialize the
// intialization of the mutex and synch objects.
#include "ace/Malloc.h"
#include "ace/SV_Semaphore_Complex.h"
#include "Semaphore_Test.h"
ACE_Malloc<ACE_Shared_Memory_Pool, ACE_SV_Semaphore_Simple> allocator;
ACE_SV_Semaphore_Complex *mutex = 0;
ACE_SV_Semaphore_Complex *synch = 0;
/* Pointer to memory shared by both the client and server. */
static char *shm;
static int
do_parent (void)
{
char *s = shm;
mutex = new ACE_SV_Semaphore_Complex (SEM_KEY_1, ACE_SV_Semaphore_Complex::ACE_CREATE, 0);
synch = new ACE_SV_Semaphore_Complex (SEM_KEY_2, ACE_SV_Semaphore_Complex::ACE_CREATE, 0);
for (char c = 'a'; c <= 'z'; c++)
*s++ = c;
*s = '\0';
if (mutex->release () == -1)
ACE_ERROR_RETURN ((LM_ERROR, "%p", "server mutex.release"), 1);
if (synch->acquire () == -1)
ACE_ERROR_RETURN ((LM_ERROR, "%p", "server synch.acquire"), 1);
return 0;
}
static int
do_child (void)
{
mutex = new ACE_SV_Semaphore_Complex (SEM_KEY_1, ACE_SV_Semaphore_Complex::ACE_CREATE, 0);
synch = new ACE_SV_Semaphore_Complex (SEM_KEY_2, ACE_SV_Semaphore_Complex::ACE_CREATE, 0);
while (mutex->tryacquire () == -1)
if (errno == EAGAIN)
ACE_DEBUG ((LM_DEBUG, "spinning in client!\n"));
else
ACE_ERROR_RETURN ((LM_ERROR, "client mutex.tryacquire"), 1);
for (char *s = (char *) shm; *s != '\0'; s++)
putchar (*s);
putchar ('\n');
if (synch->release () == -1)
ACE_ERROR_RETURN ((LM_ERROR, "client synch.release"), 1);
return 0;
}
int
main (void)
{
shm = (char *) allocator.malloc (27);
switch (ACE_OS::fork ())
{
case -1:
ACE_ERROR_RETURN ((LM_ERROR, "fork failed\n"), -1);
/* NOTREACHED */
case 0:
return do_child ();
default:
{
int result = do_parent ();
if (wait (0) == -1)
ACE_ERROR_RETURN ((LM_ERROR, "wait"), -1);
allocator.remove ();
if (mutex->remove () == -1)
ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "mutex.remove"), -1);
else if (synch->remove () == -1)
ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "synch.remove"), -1);
return result;
}
}
}
#if defined (ACE_TEMPLATES_REQUIRE_SPECIALIZATION)
template class ACE_Malloc<ACE_Shared_Memory_Pool, ACE_SV_Semaphore_Simple>;
#endif /* ACE_TEMPLATES_REQUIRE_SPECIALIZATION */
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