about summary refs log tree commit diff
path: root/db2/os/os_spin.c
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@redhat.com>2000-01-02 06:01:06 +0000
committerUlrich Drepper <drepper@redhat.com>2000-01-02 06:01:06 +0000
commit8d6f1731fcd082e4f744ba9cb4bde4be7c08f1b3 (patch)
tree099a250d7366aef2ab028fdb24f0d692cd784b4a /db2/os/os_spin.c
parent9a6450d578556c11e7c173d2f28362345b8f1258 (diff)
downloadglibc-8d6f1731fcd082e4f744ba9cb4bde4be7c08f1b3.tar.gz
glibc-8d6f1731fcd082e4f744ba9cb4bde4be7c08f1b3.tar.xz
glibc-8d6f1731fcd082e4f744ba9cb4bde4be7c08f1b3.zip
Update.
	* Makeconfig (all-subdirs): Remove db and db2.
	* db/*: Removed.
	* db2/*: Removed.
Diffstat (limited to 'db2/os/os_spin.c')
-rw-r--r--db2/os/os_spin.c107
1 files changed, 0 insertions, 107 deletions
diff --git a/db2/os/os_spin.c b/db2/os/os_spin.c
deleted file mode 100644
index cbde58894a..0000000000
--- a/db2/os/os_spin.c
+++ /dev/null
@@ -1,107 +0,0 @@
-/*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1997, 1998
- *	Sleepycat Software.  All rights reserved.
- */
-
-#include "config.h"
-
-#ifndef lint
-static const char sccsid[] = "@(#)os_spin.c	10.10 (Sleepycat) 10/12/98";
-#endif /* not lint */
-
-#ifndef NO_SYSTEM_INCLUDES
-#include <sys/types.h>
-#if defined(HAVE_PSTAT_GETDYNAMIC)
-#include <sys/pstat.h>
-#endif
-
-#include <limits.h>
-#include <unistd.h>
-#endif
-
-#include "db_int.h"
-#include "os_jump.h"
-
-#if defined(HAVE_PSTAT_GETDYNAMIC)
-/*
- * __os_pstat_getdynamic --
- *	HP/UX.
- */
-static int
-__os_pstat_getdynamic()
-{
-	struct pst_dynamic psd;
-
-	return (pstat_getdynamic(&psd,
-	    sizeof(psd), (size_t)1, 0) == -1 ? 1 : psd.psd_proc_cnt);
-}
-#endif
-
-#if defined(HAVE_SYSCONF) && defined(_SC_NPROCESSORS_ONLN)
-/*
- * __os_sysconf --
- *	Solaris, Linux.
- */
-static int
-__os_sysconf(void)
-{
-	int nproc;
-
-	return ((nproc = sysconf(_SC_NPROCESSORS_ONLN)) > 1 ? nproc : 1);
-}
-#endif
-
-/*
- * __os_spin --
- *	Return the number of default spins before blocking.
- *
- * PUBLIC: int __os_spin __P((void));
- */
-int
-__os_spin()
-{
-	/*
-	 * If the application specified a value or we've already figured it
-	 * out, return it.
-	 *
-	 * XXX
-	 * We don't want to repeatedly call the underlying function because
-	 * it can be expensive (e.g., requiring multiple filesystem accesses
-	 * under Debian Linux).
-	 */
-	if (DB_GLOBAL(db_tsl_spins) != 0)
-		return (DB_GLOBAL(db_tsl_spins));
-
-	DB_GLOBAL(db_tsl_spins) = 1;
-#if defined(HAVE_PSTAT_GETDYNAMIC)
-	DB_GLOBAL(db_tsl_spins) = __os_pstat_getdynamic();
-#endif
-#if defined(HAVE_SYSCONF) && defined(_SC_NPROCESSORS_ONLN)
-	DB_GLOBAL(db_tsl_spins) = __os_sysconf();
-#endif
-
-	/*
-	 * Spin 50 times per processor, we have anecdotal evidence that this
-	 * is a reasonable value.
-	 */
-	DB_GLOBAL(db_tsl_spins) *= 50;
-
-	return (DB_GLOBAL(db_tsl_spins));
-}
-
-/*
- * __os_yield --
- *	Yield the processor.
- *
- * PUBLIC: void __os_yield __P((u_long));
- */
-void
-__os_yield(usecs)
-	u_long usecs;
-{
-	if (__db_jump.j_yield != NULL && __db_jump.j_yield() == 0)
-		return;
-	__os_sleep(0, usecs);
-}