Major update for pthreads, based in large part on improvements

from glibc 2.3.  This should make threads much more efficient.
 -Erik

1 files changed, 32 insertions, 13 deletions

diff --git a/libpthread/linuxthreads/sysdeps/alpha/pt-machine.h b/libpthread/linuxthreads/sysdeps/alpha/pt-machine.h
index e59c6906c..fa0374bc5 100644
--- a/libpthread/linuxthreads/sysdeps/alpha/pt-machine.h
+++ b/libpthread/linuxthreads/sysdeps/alpha/pt-machine.h
@@ -1,30 +1,39 @@
 /* Machine-dependent pthreads configuration and inline functions.
    Alpha version.
-   Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
+   Copyright (C) 1996, 1997, 1998, 2000, 2002 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 Library General Public License as
-   published by the Free Software Foundation; either version 2 of the
+   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
-   Library General Public License for more details.
+   Lesser General Public License for more details.
 
-   You should have received a copy of the GNU Library General Public
+   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
 #endif
 
-#include <asm/pal.h>
+#ifdef __linux__
+# include <asm/pal.h>
+#else
+# include <machine/pal.h>
+#endif
 
+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.  */
@@ -32,6 +41,12 @@
 register char *stack_pointer __asm__("$30");
 
 
+/* Memory barrier; default is to do nothing */
+#define MEMORY_BARRIER() __asm__ __volatile__("mb" : : : "memory")
+/* Write barrier.  */
+#define WRITE_MEMORY_BARRIER() __asm__ __volatile__("wmb" : : : "memory")
+
+
 /* Spinlock implementation; required.  */
 PT_EI long int
 testandset (int *spinlock)
@@ -55,11 +70,6 @@ testandset (int *spinlock)
   return ret;
 }
 
-/* Spinlock release; default is just set to zero.  */
-#define RELEASE(spinlock) \
-  __asm__ __volatile__("mb" : : : "memory"); \
-  *spinlock = 0
-
 
 /* Begin allocating thread stacks at this address.  Default is to allocate
    them just below the initial program stack.  */
@@ -70,7 +80,7 @@ testandset (int *spinlock)
 #define THREAD_SELF \
 ({									      \
   register pthread_descr __self __asm__("$0");				      \
-  __asm__ ("call_pal %1" : "=r"(__self) : "i"(PAL_rduniq) : "$0");	      \
+  __asm__ ("call_pal %1" : "=r"(__self) : "i"(PAL_rduniq));		      \
   __self;								      \
 })
 
@@ -102,7 +112,16 @@ __compare_and_swap (long int *p, long int oldval, long int newval)
 	"2:\tmb\n"
 	"/* End compare & swap */"
 	: "=&r"(ret), "=m"(*p)
-	: "r"(oldval), "r"(newval), "m"(*p));
+	: "r"(oldval), "r"(newval), "m"(*p)
+        : "memory");
 
   return ret;
 }
+
+/* We want the OS to assign stack addresses.  */
+#define FLOATING_STACKS 1
+
+/* Maximum size of the stack if the rlimit is unlimited.  */
+#define ARCH_STACK_MAX_SIZE     32*1024*1024
+
+#endif /* pt-machine.h */