Installation-written resource managers

If an installation creates a function that uses a resource that cannot be protected by an ESTAE-type recovery routine or an FRR, the installation should write a resource manager for that function. The installation-written resource manager should perform the same basic tasks for this new function that system resource managers perform for system functions. These are:

• At task termination: ensure that the terminating task is not connected to or associated with any resources; that is, each resource (data set, volume, device) is left in such a state that another task in the address space or system can reuse it.
• At address space termination: release all system queue area and common service area control blocks obtained for the use of the terminating address space. Reset all buffers, bit settings, pointers, and so on relating to the address space.