1 files changed, 0 insertions, 447 deletions
diff --git a/db2/os/os_map.c b/db2/os/os_map.c
deleted file mode 100644
index 5664a2edec..0000000000
--- a/db2/os/os_map.c
+++ /dev/null
@@ -1,447 +0,0 @@
-/*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1996, 1997, 1998
- *	Sleepycat Software.  All rights reserved.
- */
-
-#include "config.h"
-
-#ifndef lint
-static const char sccsid[] = "@(#)os_map.c	10.24 (Sleepycat) 10/12/98";
-#endif /* not lint */
-
-#ifndef NO_SYSTEM_INCLUDES
-#include <sys/types.h>
-#ifdef HAVE_MMAP
-#include <sys/mman.h>
-#endif
-
-#ifdef HAVE_SHMGET
-#include <sys/ipc.h>
-#include <sys/shm.h>
-#endif
-
-#include <errno.h>
-#include <string.h>
-#endif
-
-#include "db_int.h"
-#include "os_jump.h"
-#include "common_ext.h"
-
-#ifdef HAVE_MMAP
-static int __os_map __P((char *, int, size_t, int, int, int, void **));
-#endif
-#ifdef HAVE_SHMGET
-static int __os_shmget __P((REGINFO *));
-#endif
-
-/*
- * __db_mapanon_ok --
- *	Return if this OS can support anonymous memory regions.
- *
- * PUBLIC: int __db_mapanon_ok __P((int));
- */
-int
-__db_mapanon_ok(need_names)
-	int need_names;
-{
-	int ret;
-
-	ret = EINVAL;
-
-	/*
-	 * If we don't have spinlocks, we have to have a file descriptor
-	 * for fcntl(2) locking, which implies using mmap(2) to map in a
-	 * regular file.  Theoretically, we could probably find ways to
-	 * get a file descriptor to lock other types of shared regions,
-	 * but I don't see any reason to do so.
-	 *
-	 * If need_names is set, the application wants to share anonymous
-	 * memory among multiple processes, so we have to have a way to
-	 * name it.  This requires shmget(2), on UNIX systems.
-	 */
-#ifdef HAVE_SPINLOCKS
-#ifdef HAVE_SHMGET
-	ret = 0;
-#endif
-#ifdef HAVE_MMAP
-#ifdef MAP_ANON
-	if (!need_names)
-		ret = 0;
-#endif
-#ifdef MAP_ANONYMOUS
-	if (!need_names)
-		ret = 0;
-#endif
-#else
-	COMPQUIET(need_names, 0);
-#endif /* HAVE_MMAP */
-#endif /* HAVE_SPINLOCKS */
-
-	return (ret);
-}
-
-/*
- * __db_mapinit --
- *	Return if shared regions need to be initialized.
- *
- * PUBLIC: int __db_mapinit __P((void));
- */
-int
-__db_mapinit()
-{
-	/*
-	 * Historically, some systems required that all of the bytes of the
-	 * region be written before it could be mmapped and accessed randomly.
-	 * We have the option of setting REGION_INIT_NEEDED at configuration
-	 * time if we're running on one of those systems.
-	 */
-#ifdef REGION_INIT_NEEDED
-	return (1);
-#else
-	return (0);
-#endif
-}
-
-/*
- * __db_mapregion --
- *	Attach to a shared memory region.
- *
- * PUBLIC: int __db_mapregion __P((char *, REGINFO *));
- */
-int
-__db_mapregion(path, infop)
-	char *path;
-	REGINFO *infop;
-{
-	int called, ret;
-
-	called = 0;
-	ret = EINVAL;
-
-	/* If the user replaces the map call, call through their interface. */
-	if (__db_jump.j_map != NULL) {
-		F_SET(infop, REGION_HOLDINGSYS);
-		return (__db_jump.j_map(path, infop->fd, infop->size,
-		    1, F_ISSET(infop, REGION_ANONYMOUS), 0, &infop->addr));
-	}
-
-	if (F_ISSET(infop, REGION_ANONYMOUS)) {
-		/*
-		 * !!!
-		 * If we're creating anonymous regions:
-		 *
-		 * If it's private, we use mmap(2).  The problem with using
-		 * shmget(2) is that we may be creating a region of which the
-		 * application isn't aware, and if the application crashes
-		 * we'll have no way to remove the system resources for the
-		 * region.
-		 *
-		 * If it's not private, we use the shmget(2) interface if it's
-		 * available, because it allows us to name anonymous memory.
-		 * If shmget(2) isn't available, use the mmap(2) calls.
-		 *
-		 * In the case of anonymous memory, using mmap(2) means the
-		 * memory isn't named and only the single process and its
-		 * threads can access the region.
-		 */
-#ifdef	HAVE_MMAP
-#ifdef	MAP_ANON
-#define	HAVE_MMAP_ANONYMOUS	1
-#else
-#ifdef	MAP_ANONYMOUS
-#define	HAVE_MMAP_ANONYMOUS	1
-#endif
-#endif
-#endif
-#ifdef HAVE_MMAP_ANONYMOUS
-		if (!called && F_ISSET(infop, REGION_PRIVATE)) {
-			called = 1;
-			ret = __os_map(path,
-			    infop->fd, infop->size, 1, 1, 0, &infop->addr);
-		}
-#endif
-#ifdef HAVE_SHMGET
-		if (!called) {
-			called = 1;
-			ret = __os_shmget(infop);
-		}
-#endif
-#ifdef HAVE_MMAP
-		/*
-		 * If we're trying to join an unnamed anonymous region, fail --
-		 * that's not possible.
-		 */
-		if (!called) {
-			called = 1;
-
-			if (!F_ISSET(infop, REGION_CREATED)) {
-				__db_err(infop->dbenv,
-			    "cannot join region in unnamed anonymous memory");
-				return (EINVAL);
-			}
-
-			ret = __os_map(path,
-			    infop->fd, infop->size, 1, 1, 0, &infop->addr);
-		}
-#endif
-	} else {
-		/*
-		 * !!!
-		 * If we're creating normal regions, we use the mmap(2)
-		 * interface if it's available because it's POSIX 1003.1
-		 * standard and we trust it more than we do shmget(2).
-		 */
-#ifdef HAVE_MMAP
-		if (!called) {
-			called = 1;
-
-			/* Mmap(2) regions that aren't anonymous can grow. */
-			F_SET(infop, REGION_CANGROW);
-
-			ret = __os_map(path,
-			    infop->fd, infop->size, 1, 0, 0, &infop->addr);
-		}
-#endif
-#ifdef HAVE_SHMGET
-		if (!called) {
-			called = 1;
-			ret = __os_shmget(infop);
-		}
-#endif
-	}
-	return (ret);
-}
-
-/*
- * __db_unmapregion --
- *	Detach from the shared memory region.
- *
- * PUBLIC: int __db_unmapregion __P((REGINFO *));
- */
-int
-__db_unmapregion(infop)
-	REGINFO *infop;
-{
-	int called, ret;
-
-	called = 0;
-	ret = EINVAL;
-
-	if (__db_jump.j_unmap != NULL)
-		return (__db_jump.j_unmap(infop->addr, infop->size));
-
-#ifdef HAVE_SHMGET
-	if (infop->segid != INVALID_SEGID) {
-		called = 1;
-		ret = shmdt(infop->addr) ? errno : 0;
-	}
-#endif
-#ifdef HAVE_MMAP
-	if (!called) {
-		called = 1;
-		ret = munmap(infop->addr, infop->size) ? errno : 0;
-	}
-#endif
-	return (ret);
-}
-
-/*
- * __db_unlinkregion --
- *	Remove the shared memory region.
- *
- * PUBLIC: int __db_unlinkregion __P((char *, REGINFO *));
- */
-int
-__db_unlinkregion(name, infop)
-	char *name;
-	REGINFO *infop;
-{
-	int called, ret;
-
-	called = 0;
-	ret = EINVAL;
-
-	if (__db_jump.j_runlink != NULL)
-		return (__db_jump.j_runlink(name));
-
-#ifdef HAVE_SHMGET
-	if (infop->segid != INVALID_SEGID) {
-		called = 1;
-		ret = shmctl(infop->segid, IPC_RMID, NULL) ? errno : 0;
-	}
-#endif
-#ifdef HAVE_MMAP
-	COMPQUIET(infop, NULL);
-	if (!called) {
-		called = 1;
-		ret = 0;
-	}
-#endif
-	return (ret);
-}
-
-/*
- * __db_mapfile --
- *	Map in a shared memory file.
- *
- * PUBLIC: int __db_mapfile __P((char *, int, size_t, int, void **));
- */
-int
-__db_mapfile(path, fd, len, is_rdonly, addr)
-	char *path;
-	int fd, is_rdonly;
-	size_t len;
-	void **addr;
-{
-	if (__db_jump.j_map != NULL)
-		return (__db_jump.j_map(path, fd, len, 0, 0, is_rdonly, addr));
-
-#ifdef HAVE_MMAP
-	return (__os_map(path, fd, len, 0, 0, is_rdonly, addr));
-#else
-	return (EINVAL);
-#endif
-}
-
-/*
- * __db_unmapfile --
- *	Unmap the shared memory file.
- *
- * PUBLIC: int __db_unmapfile __P((void *, size_t));
- */
-int
-__db_unmapfile(addr, len)
-	void *addr;
-	size_t len;
-{
-	if (__db_jump.j_unmap != NULL)
-		return (__db_jump.j_unmap(addr, len));
-
-#ifdef HAVE_MMAP
-	return (munmap(addr, len) ? errno : 0);
-#else
-	return (EINVAL);
-#endif
-}
-
-#ifdef HAVE_MMAP
-/*
- * __os_map --
- *	Call the mmap(2) function.
- */
-static int
-__os_map(path, fd, len, is_region, is_anonymous, is_rdonly, addr)
-	char *path;
-	int fd, is_region, is_anonymous, is_rdonly;
-	size_t len;
-	void **addr;
-{
-	void *p;
-	int flags, prot;
-
-	COMPQUIET(path, NULL);
-
-	/*
-	 * If it's read-only, it's private, and if it's not, it's shared.
-	 * Don't bother with an additional parameter.
-	 */
-	flags = is_rdonly ? MAP_PRIVATE : MAP_SHARED;
-
-	if (is_region && is_anonymous) {
-		/*
-		 * BSD derived systems use MAP_ANON; Digital Unix and HP/UX
-		 * use MAP_ANONYMOUS.
-		 */
-#ifdef MAP_ANON
-		flags |= MAP_ANON;
-#endif
-#ifdef MAP_ANONYMOUS
-		flags |= MAP_ANONYMOUS;
-#endif
-		fd = -1;
-	}
-#ifdef MAP_FILE
-	if (!is_region || !is_anonymous) {
-		/*
-		 * Historically, MAP_FILE was required for mapping regular
-		 * files, even though it was the default.  Some systems have
-		 * it, some don't, some that have it set it to 0.
-		 */
-		flags |= MAP_FILE;
-	}
-#endif
-
-	/*
-	 * I know of no systems that implement the flag to tell the system
-	 * that the region contains semaphores, but it's not an unreasonable
-	 * thing to do, and has been part of the design since forever.  I
-	 * don't think anyone will object, but don't set it for read-only
-	 * files, it doesn't make sense.
-	 */
-#ifdef MAP_HASSEMAPHORE
-	if (!is_rdonly)
-		flags |= MAP_HASSEMAPHORE;
-#endif
-
-	prot = PROT_READ | (is_rdonly ? 0 : PROT_WRITE);
-
-/*
- * XXX
- * Work around a bug in the VMS V7.1 mmap() implementation.  To map a file
- * into memory on VMS it needs to be opened in a certain way, originally.
- * To get the file opened in that certain way, the VMS mmap() closes the
- * file and re-opens it.  When it does this, it doesn't flush any caches
- * out to disk before closing.  The problem this causes us is that when the
- * memory cache doesn't get written out, the file isn't big enough to match
- * the memory chunk and the mmap() call fails.  This call to fsync() fixes
- * the problem.  DEC thinks this isn't a bug because of language in XPG5
- * discussing user responsibility for on-disk and in-memory synchronization.
- */
-#ifdef VMS
-	if (__os_fsync(fd) == -1)
-		return(errno);
-#endif
-
-	/* MAP_FAILED was not defined in early mmap implementations. */
-#ifndef MAP_FAILED
-#define	MAP_FAILED	-1
-#endif
-	if ((p =
-	    mmap(NULL, len, prot, flags, fd, (off_t)0)) == (void *)MAP_FAILED)
-		return (errno);
-
-	*addr = p;
-	return (0);
-}
-#endif
-
-#ifdef HAVE_SHMGET
-/*
- * __os_shmget --
- *	Call the shmget(2) family of functions.
- */
-static int
-__os_shmget(infop)
-	REGINFO *infop;
-{
-	if (F_ISSET(infop, REGION_CREATED) &&
-	   (infop->segid = shmget(0, infop->size, IPC_PRIVATE | 0600)) == -1)
-		return (errno);
-
-	if ((infop->addr = shmat(infop->segid, NULL, 0)) == (void *)-1) {
-		/*
-		 * If we're trying to join the region and failing, assume
-		 * that there was a reboot and the region no longer exists.
-		 */
-		if (!F_ISSET(infop, REGION_CREATED))
-			errno = EAGAIN;
-		return (errno);
-	}
-
-	F_SET(infop, REGION_HOLDINGSYS);
-	return (0);
-}
-#endif