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To do so, move InitializeLatchSupport() into the new common process initialization functions, and add a new global variable MyLatch. MyLatch is usable as soon InitPostmasterChild() has been called (i.e. very early during startup). Initially it points to a process local latch that exists in all processes. InitProcess/InitAuxiliaryProcess then replaces that local latch with PGPROC->procLatch. During shutdown the reverse happens. This is primarily advantageous for two reasons: For one it simplifies dealing with the shared process latch, especially in signal handlers, because instead of having to check for MyProc, MyLatch can be used unconditionally. For another, a later patch that makes FEs/BE communication use latches, now can rely on the existence of a latch, even before having gone through InitProcess. Discussion: 20140927191243.GD5423@alap3.anarazel.de |
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| .. | ||
| backendid.h | ||
| barrier.h | ||
| block.h | ||
| buf.h | ||
| buf_internals.h | ||
| buffile.h | ||
| bufmgr.h | ||
| bufpage.h | ||
| checksum.h | ||
| checksum_impl.h | ||
| copydir.h | ||
| dsm.h | ||
| dsm_impl.h | ||
| fd.h | ||
| freespace.h | ||
| fsm_internals.h | ||
| indexfsm.h | ||
| ipc.h | ||
| item.h | ||
| itemid.h | ||
| itemptr.h | ||
| large_object.h | ||
| latch.h | ||
| lmgr.h | ||
| lock.h | ||
| lwlock.h | ||
| off.h | ||
| pg_sema.h | ||
| pg_shmem.h | ||
| pmsignal.h | ||
| pos.h | ||
| predicate.h | ||
| predicate_internals.h | ||
| proc.h | ||
| procarray.h | ||
| procsignal.h | ||
| reinit.h | ||
| relfilenode.h | ||
| s_lock.h | ||
| shm_mq.h | ||
| shm_toc.h | ||
| shmem.h | ||
| sinval.h | ||
| sinvaladt.h | ||
| smgr.h | ||
| spin.h | ||
| standby.h | ||