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backendid.h	1.1 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
barrier.h	1.42 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
block.h	3.22 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
buf.h	1.06 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
buf_internals.h	12.27 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
buffile.h	2.07 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
bufmgr.h	9.05 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
bufpage.h	15.28 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
checksum.h	670 B	-rw-r--r--	2023-11-20 11:17:48	Edit Del
checksum_impl.h	8.88 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
condition_variable.h	2.46 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
copydir.h	565 B	-rw-r--r--	2023-11-20 11:17:48	Edit Del
dsm.h	2.08 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
dsm_impl.h	2.24 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
fd.h	5.42 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
freespace.h	1.33 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
fsm_internals.h	2.27 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
indexfsm.h	799 B	-rw-r--r--	2023-11-20 11:17:48	Edit Del
ipc.h	2.7 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
item.h	473 B	-rw-r--r--	2023-11-20 11:17:48	Edit Del
itemid.h	4.24 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
itemptr.h	5.47 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
large_object.h	3.57 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
latch.h	6.92 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
lmgr.h	4.32 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
lock.h	23.63 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
lockdefs.h	1.84 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
lwlock.h	8.49 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
lwlocknames.h	2.7 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
off.h	1.58 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
pg_sema.h	2.15 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
pg_shmem.h	2.27 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
pmsignal.h	2.1 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
predicate.h	2.71 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
predicate_internals.h	17.03 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
proc.h	12.73 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
procarray.h	5.45 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
proclist.h	6.51 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
proclist_types.h	1.55 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
procsignal.h	1.91 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
reinit.h	735 B	-rw-r--r--	2023-11-20 11:17:48	Edit Del
relfilenode.h	3.81 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
s_lock.h	30.11 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
sharedfileset.h	1.51 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
shm_mq.h	2.63 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
shm_toc.h	2.2 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
shmem.h	2.72 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
sinval.h	5.48 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
sinvaladt.h	1.58 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
smgr.h	5.99 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
spin.h	2.42 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
standby.h	3.34 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del
standbydefs.h	2.25 KB	-rw-r--r--	2023-11-20 11:17:48	Edit Del

Editing: pg_shmem.h (2.27 KB)

/*-------------------------------------------------------------------------
 *
 * pg_shmem.h
 *	  Platform-independent API for shared memory support.
 *
 * Every port is expected to support shared memory with approximately
 * SysV-ish semantics; in particular, a memory block is not anonymous
 * but has an ID, and we must be able to tell whether there are any
 * remaining processes attached to a block of a specified ID.
 *
 * To simplify life for the SysV implementation, the ID is assumed to
 * consist of two unsigned long values (these are key and ID in SysV
 * terms).  Other platforms may ignore the second value if they need
 * only one ID number.
 *
 *
 * Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/storage/pg_shmem.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef PG_SHMEM_H
#define PG_SHMEM_H

#include "storage/dsm_impl.h"

typedef struct PGShmemHeader	/* standard header for all Postgres shmem */
{
	int32		magic;			/* magic # to identify Postgres segments */
#define PGShmemMagic  679834894
	pid_t		creatorPID;		/* PID of creating process (set but unread) */
	Size		totalsize;		/* total size of segment */
	Size		freeoffset;		/* offset to first free space */
	dsm_handle	dsm_control;	/* ID of dynamic shared memory control seg */
	void	   *index;			/* pointer to ShmemIndex table */
#ifndef WIN32					/* Windows doesn't have useful inode#s */
	dev_t		device;			/* device data directory is on */
	ino_t		inode;			/* inode number of data directory */
#endif
} PGShmemHeader;

/* GUC variable */
extern int	huge_pages;

/* Possible values for huge_pages */
typedef enum
{
	HUGE_PAGES_OFF,
	HUGE_PAGES_ON,
	HUGE_PAGES_TRY
}			HugePagesType;

#ifndef WIN32
extern unsigned long UsedShmemSegID;
#else
extern HANDLE UsedShmemSegID;
extern void *ShmemProtectiveRegion;
#endif
extern void *UsedShmemSegAddr;

#ifdef EXEC_BACKEND
extern void PGSharedMemoryReAttach(void);
extern void PGSharedMemoryNoReAttach(void);
#endif

extern PGShmemHeader *PGSharedMemoryCreate(Size size, int port,
					 PGShmemHeader **shim);
extern bool PGSharedMemoryIsInUse(unsigned long id1, unsigned long id2);
extern void PGSharedMemoryDetach(void);

#endif							/* PG_SHMEM_H */