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Hi!
2000-06-02 Jakub Jelinek <jakub@redhat.com>
* sysdeps/sparc/sparc32/pspinlock.c: Implement spinlocks.
* sysdeps/sparc/sparc32/sparcv9/pspinlock.c: New.
* sysdeps/sparc/sparc64/pspinlock.c: Implement spinlocks.
--- libc/linuxthreads/sysdeps/sparc/sparc32/pspinlock.c.jj Thu May 25 07:28:53 2000
+++ libc/linuxthreads/sysdeps/sparc/sparc32/pspinlock.c Fri Jun 2 15:37:05 2000
@@ -21,10 +21,25 @@
#include <pthread.h>
+/* This implementation is similar to the one used in the Linux kernel. */
int
__pthread_spin_lock (pthread_spinlock_t *lock)
{
- XXX
+ asm volatile
+ ("1: ldstub [%0], %%g2\n"
+ " orcc %%g2, 0x0, %%g0\n"
+ " bne,a 2f\n"
+ " ldub [%0], %%g2\n"
+ ".subsection 2\n"
+ "2: orcc %%g2, 0x0, %%g0\n"
+ " bne,a 2b\n"
+ " ldub [%0], %%g2\n"
+ " b,a 1b\n"
+ ".previous"
+ : /* no outputs */
+ : "r" (lock)
+ : "g2", "memory", "cc");
+ return 0;
}
weak_alias (__pthread_spin_lock, pthread_spin_lock)
@@ -32,7 +47,13 @@ weak_alias (__pthread_spin_lock, pthread
int
__pthread_spin_trylock (pthread_spinlock_t *lock)
{
- XXX
+ int result;
+ asm volatile
+ ("ldstub [%1], %0"
+ : "=r" (result)
+ : "r" (lock)
+ : "memory");
+ return result == 0 ? 0 : EBUSY;
}
weak_alias (__pthread_spin_trylock, pthread_spin_trylock)
@@ -40,7 +61,8 @@ weak_alias (__pthread_spin_trylock, pthr
int
__pthread_spin_unlock (pthread_spinlock_t *lock)
{
- XXX
+ *lock = 0;
+ return 0;
}
weak_alias (__pthread_spin_unlock, pthread_spin_unlock)
@@ -51,7 +73,7 @@ __pthread_spin_init (pthread_spinlock_t
/* We can ignore the `pshared' parameter. Since we are busy-waiting
all processes which can access the memory location `lock' points
to can use the spinlock. */
- XXX
+ *lock = 0;
return 0;
}
weak_alias (__pthread_spin_init, pthread_spin_init)
--- libc/linuxthreads/sysdeps/sparc/sparc32/sparcv9/pspinlock.c.jj Fri Jun 2 15:37:33 2000
+++ libc/linuxthreads/sysdeps/sparc/sparc32/sparcv9/pspinlock.c Fri Jun 2 15:37:52 2000
@@ -0,0 +1,93 @@
+/* POSIX spinlock implementation. SPARC v9 version.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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
+ 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.
+
+ You should have received a copy of the GNU Library 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. */
+
+#include <errno.h>
+#include <pthread.h>
+
+
+/* This implementation is similar to the one used in the Linux kernel. */
+int
+__pthread_spin_lock (pthread_spinlock_t *lock)
+{
+ asm volatile
+ ("1: ldstub [%0], %%g2\n"
+ " brnz,pn %%g2, 2f\n"
+ " membar #StoreLoad | #StoreStore\n"
+ ".subsection 2\n"
+ "2: ldub [%0], %%g2\n"
+ " brnz,pt 2b\n"
+ " membar #LoadLoad\n"
+ " b,a,pt %%xcc, 1b\n"
+ ".previous"
+ : /* no outputs */
+ : "r" (lock)
+ : "g2", "memory");
+ return 0;
+}
+weak_alias (__pthread_spin_lock, pthread_spin_lock)
+
+
+int
+__pthread_spin_trylock (pthread_spinlock_t *lock)
+{
+ int result;
+ asm volatile
+ ("ldstub [%1], %0\n"
+ "membar #StoreLoad | #StoreStore"
+ : "=r" (result)
+ : "r" (lock)
+ : "memory");
+ return result == 0 ? 0 : EBUSY;
+}
+weak_alias (__pthread_spin_trylock, pthread_spin_trylock)
+
+
+int
+__pthread_spin_unlock (pthread_spinlock_t *lock)
+{
+ asm volatile
+ ("membar #StoreStore | #LoadStore\n"
+ "stb %%g0, [%0]"
+ :
+ : "r" (lock)
+ : "memory");
+ return 0;
+}
+weak_alias (__pthread_spin_unlock, pthread_spin_unlock)
+
+
+int
+__pthread_spin_init (pthread_spinlock_t *lock, int pshared)
+{
+ /* We can ignore the `pshared' parameter. Since we are busy-waiting
+ all processes which can access the memory location `lock' points
+ to can use the spinlock. */
+ *lock = 0;
+ return 0;
+}
+weak_alias (__pthread_spin_init, pthread_spin_init)
+
+
+int
+__pthread_spin_destroy (pthread_spinlock_t *lock)
+{
+ /* Nothing to do. */
+ return 0;
+}
+weak_alias (__pthread_spin_destroy, pthread_spin_destroy)
--- libc/linuxthreads/sysdeps/sparc/sparc64/pspinlock.c.jj Thu May 25 07:29:02 2000
+++ libc/linuxthreads/sysdeps/sparc/sparc64/pspinlock.c Fri Jun 2 15:36:23 2000
@@ -21,10 +21,24 @@
#include <pthread.h>
+/* This implementation is similar to the one used in the Linux kernel. */
int
__pthread_spin_lock (pthread_spinlock_t *lock)
{
- XXX
+ asm volatile
+ ("1: ldstub [%0], %%g5\n"
+ " brnz,pn %%g5, 2f\n"
+ " membar #StoreLoad | #StoreStore\n"
+ ".subsection 2\n"
+ "2: ldub [%0], %%g5\n"
+ " brnz,pt 2b\n"
+ " membar #LoadLoad\n"
+ " b,a,pt %%xcc, 1b\n"
+ ".previous"
+ : /* no outputs */
+ : "r" (lock)
+ : "g5", "memory");
+ return 0;
}
weak_alias (__pthread_spin_lock, pthread_spin_lock)
@@ -32,7 +46,14 @@ weak_alias (__pthread_spin_lock, pthread
int
__pthread_spin_trylock (pthread_spinlock_t *lock)
{
- XXX
+ int result;
+ asm volatile
+ ("ldstub [%1], %0\n"
+ "membar #StoreLoad | #StoreStore"
+ : "=r" (result)
+ : "r" (lock)
+ : "memory");
+ return result == 0 ? 0 : EBUSY;
}
weak_alias (__pthread_spin_trylock, pthread_spin_trylock)
@@ -40,7 +61,13 @@ weak_alias (__pthread_spin_trylock, pthr
int
__pthread_spin_unlock (pthread_spinlock_t *lock)
{
- XXX
+ asm volatile
+ ("membar #StoreStore | #LoadStore\n"
+ "stb %%g0, [%0]"
+ :
+ : "r" (lock)
+ : "memory");
+ return 0;
}
weak_alias (__pthread_spin_unlock, pthread_spin_unlock)
@@ -51,7 +78,7 @@ __pthread_spin_init (pthread_spinlock_t
/* We can ignore the `pshared' parameter. Since we are busy-waiting
all processes which can access the memory location `lock' points
to can use the spinlock. */
- XXX
+ *lock = 0;
return 0;
}
weak_alias (__pthread_spin_init, pthread_spin_init)
Jakub
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