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// $Id: Allocator.cpp 95465 2012-01-20 19:07:06Z johnnyw $
#include "ace/Containers.h"
#include "ace/Malloc_T.h"
#include "ace/Synch.h" // Needed for the lock.
#include "DataElement.h"
class StackExample
{
public:
// Illustrate all the differnet
// types of stacks provided by ACE.
int run (void);
private:
// Illustrate the use of an unbounded stack.
int runUnboundedStack (ACE_Allocator* allocator);
};
// Listing 1 code/ch05
int StackExample::run (void)
{
ACE_TRACE ("StackExample::run");
ACE_Allocator *allocator = 0;
size_t block_size = sizeof(ACE_Node<DataElement>);
ACE_NEW_RETURN
(allocator,
ACE_Dynamic_Cached_Allocator<ACE_Null_Mutex>
(100 + 1, block_size),
-1);
ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("\n# of live objects %d\n"),
DataElement::numOfActiveObjects ()));
ACE_TEST_ASSERT (this->runUnboundedStack (allocator) != -1);
ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("\n# of live objects %d\n"),
DataElement::numOfActiveObjects ()));
delete allocator;
return 0;
}
// Listing 1
// Listing 2 code/ch05
int StackExample::runUnboundedStack (ACE_Allocator* allocator)
{
ACE_TRACE ("StackExample::runUnboundedStack");
// Pass in an allocator during construction.
ACE_Unbounded_Stack<DataElement> ustack (allocator);
for (int m = 0; m < 100; m++)
{
DataElement elem (m);
int result = ustack.push (elem);
if (result == -1)
ACE_ERROR_RETURN
((LM_ERROR, ACE_TEXT ("%p\n"),
ACE_TEXT ("Push Next Element")),
-1);
}
void* furtherMemory = 0;
furtherMemory = allocator->malloc
(sizeof(ACE_Node<DataElement>));
ACE_TEST_ASSERT (furtherMemory == 0);
// No memory left..
ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("%p\n"),
ACE_TEXT ("No memory..")));
// Free up some memory in the allocator.
DataElement e;
for (int n = 0; n < 10; n++)
{
ustack.pop (e);
}
furtherMemory =
allocator->malloc (sizeof (ACE_Node<DataElement>));
ACE_TEST_ASSERT (furtherMemory != 0);
return 0;
}
// Listing 2
int ACE_TMAIN (int, ACE_TCHAR *[])
{
StackExample se;
return se.run ();
}
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