Question about using heap

[정복득]

Hi, 

My program runs two kinds of RPC server in a single process.
Do I need to get sliced heap for each RPC server or can I just share one sliced heap object between the rpc server?

For example,
Sliced_heap sliced_heap1(env()->ram_session(), env()->rm_session());
Sliced_heap sliced_heap2(env()->ram_session(), env()->rm_session());
...
Server1_root_component server1_root(&server1_ep, &sliced_heap1, ....);
Server2_root_component server1_root(&server2_ep, &sliced_heap2, ....);

OR
Sliced_heap sliced_heap(env()->ram_session(), env()->rm_session());
...
Server1_root_component server1_root(&server1_ep, &sliced_heap, ....);
Server2_root_component server1_root(&server2_ep, &sliced_heap, ....);

My another question is :
Do I need to use Synchronized_allocator to allocate a memory from heap (for object creation) when running multiple thread? 
Or is it ok to call (env()->heap()) for object creation in heap?

Thank you.

Bokdeuk Jeong