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/*-------------------------------------------------------------------------
*
* pg_numa.h
* Basic NUMA portability routines
*
*
* Copyright (c) 2025, PostgreSQL Global Development Group
*
* IDENTIFICATION
* src/include/port/pg_numa.h
*
*-------------------------------------------------------------------------
*/
#ifndef PG_NUMA_H
#define PG_NUMA_H
#include "fmgr.h"
extern PGDLLIMPORT int pg_numa_init(void);
extern PGDLLIMPORT int pg_numa_query_pages(int pid, unsigned long count, void **pages, int *status);
extern PGDLLIMPORT int pg_numa_get_max_node(void);
extern PGDLLIMPORT Size pg_numa_get_pagesize(void);
#ifdef USE_LIBNUMA
/*
* This is required on Linux, before pg_numa_query_pages() as we
* need to page-fault before move_pages(2) syscall returns valid results.
*/
#define pg_numa_touch_mem_if_required(ro_volatile_var, ptr) \
ro_volatile_var = *(volatile uint64 *) ptr
#else
#define pg_numa_touch_mem_if_required(ro_volatile_var, ptr) \
do {} while(0)
#endif
#endif /* PG_NUMA_H */
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