Function ProcLockHashCode

src/include/storage/lock.h:626–639

* Compute the hash code associated with a PROCLOCKTAG, given the hashcode * for its underlying LOCK. * * We use this just to avoid redundant calls of LockTagHashCode(). */

 * We use this just to avoid redundant calls of LockTagHashCode().
 */
static inline uint32
ProcLockHashCode(const PROCLOCKTAG *proclocktag, uint32 hashcode)
{
	uint32		lockhash = hashcode;
	Datum		procptr;

	/*
	 * This must match proclock_hash()!
	 */
	procptr = PointerGetDatum(proclocktag->myProc);
	lockhash ^= ((uint32) procptr) << LOG2_NUM_LOCK_PARTITIONS;

	return lockhash;
}
extern bool DoLockModesConflict(LOCKMODE mode1, LOCKMODE mode2);
extern LockAcquireResult LockAcquire(const LOCKTAG *locktag,
									 LOCKMODE lockmode,