summaryrefslogtreecommitdiff
path: root/libpthread/linuxthreads/sysdeps/i386/i686
diff options
context:
space:
mode:
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/i386/i686')
-rw-r--r--libpthread/linuxthreads/sysdeps/i386/i686/CVS/Entries3
-rw-r--r--libpthread/linuxthreads/sysdeps/i386/i686/CVS/Repository1
-rw-r--r--libpthread/linuxthreads/sysdeps/i386/i686/CVS/Root1
-rw-r--r--libpthread/linuxthreads/sysdeps/i386/i686/pt-machine.h79
4 files changed, 84 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sysdeps/i386/i686/CVS/Entries b/libpthread/linuxthreads/sysdeps/i386/i686/CVS/Entries
new file mode 100644
index 000000000..78ea7e67a
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/i386/i686/CVS/Entries
@@ -0,0 +1,3 @@
+/Versions/1.2/Tue Nov 15 14:20:47 2005//
+/pt-machine.h/1.24/Tue Nov 15 14:20:47 2005//
+D
diff --git a/libpthread/linuxthreads/sysdeps/i386/i686/CVS/Repository b/libpthread/linuxthreads/sysdeps/i386/i686/CVS/Repository
new file mode 100644
index 000000000..fe1f7daef
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/i386/i686/CVS/Repository
@@ -0,0 +1 @@
+ports/linuxthreads/sysdeps/i386/i686
diff --git a/libpthread/linuxthreads/sysdeps/i386/i686/CVS/Root b/libpthread/linuxthreads/sysdeps/i386/i686/CVS/Root
new file mode 100644
index 000000000..ca45c5d4d
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/i386/i686/CVS/Root
@@ -0,0 +1 @@
+:pserver:anoncvs@sources.redhat.com:/cvs/glibc
diff --git a/libpthread/linuxthreads/sysdeps/i386/i686/pt-machine.h b/libpthread/linuxthreads/sysdeps/i386/i686/pt-machine.h
new file mode 100644
index 000000000..1c75bf980
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/i386/i686/pt-machine.h
@@ -0,0 +1,79 @@
+/* Machine-dependent pthreads configuration and inline functions.
+ i686 version.
+ Copyright (C) 1996-2001, 2002, 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Richard Henderson <rth@tamu.edu>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#ifndef _PT_MACHINE_H
+#define _PT_MACHINE_H 1
+
+#ifndef PT_EI
+# define PT_EI extern inline __attribute__ ((always_inline))
+#endif
+#include "kernel-features.h"
+
+#ifndef __ASSEMBLER__
+extern long int testandset (int *spinlock);
+extern int __compare_and_swap (long int *p, long int oldval, long int newval);
+
+/* Get some notion of the current stack. Need not be exactly the top
+ of the stack, just something somewhere in the current frame. */
+#define CURRENT_STACK_FRAME __builtin_frame_address (0)
+
+
+/* Spinlock implementation; required. */
+PT_EI long int
+testandset (int *spinlock)
+{
+ long int ret;
+
+ __asm__ __volatile__ (
+ "xchgl %0, %1"
+ : "=r" (ret), "=m" (*spinlock)
+ : "0" (1), "m" (*spinlock)
+ : "memory");
+
+ return ret;
+}
+
+
+/* Compare-and-swap for semaphores. It's always available on i686. */
+#define HAS_COMPARE_AND_SWAP
+
+PT_EI int
+__compare_and_swap (long int *p, long int oldval, long int newval)
+{
+ char ret;
+ long int readval;
+
+ __asm__ __volatile__ ("lock; cmpxchgl %3, %1; sete %0"
+ : "=q" (ret), "=m" (*p), "=a" (readval)
+ : "r" (newval), "m" (*p), "a" (oldval)
+ : "memory");
+ return ret;
+}
+#endif
+
+#if __ASSUME_LDT_WORKS > 0
+#include "../useldt.h"
+#endif
+
+/* The P4 and above really want some help to prevent overheating. */
+#define BUSY_WAIT_NOP __asm__ ("rep; nop")
+
+#endif /* pt-machine.h */