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author | Joseph Myers <joseph@codesourcery.com> | 2012-07-01 13:06:41 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2012-07-01 13:06:41 +0000 |
commit | e64ac02c24b43659048622714afdc92fedf561fa (patch) | |
tree | 37162878b72d302de351788bec4c9360c9d55f1d /ports/sysdeps/am33/linuxthreads | |
parent | a20c2b3c87aebc7d4b090c622d36480263b80042 (diff) | |
download | glibc-e64ac02c24b43659048622714afdc92fedf561fa.tar.gz glibc-e64ac02c24b43659048622714afdc92fedf561fa.tar.xz glibc-e64ac02c24b43659048622714afdc92fedf561fa.zip |
Move all files into ports/ subdirectory in preparation for merge with glibc glibc-2.16-ports-before-merge
Diffstat (limited to 'ports/sysdeps/am33/linuxthreads')
-rw-r--r-- | ports/sysdeps/am33/linuxthreads/pspinlock.c | 73 | ||||
-rw-r--r-- | ports/sysdeps/am33/linuxthreads/pt-machine.h | 67 |
2 files changed, 140 insertions, 0 deletions
diff --git a/ports/sysdeps/am33/linuxthreads/pspinlock.c b/ports/sysdeps/am33/linuxthreads/pspinlock.c new file mode 100644 index 0000000000..a1674974ab --- /dev/null +++ b/ports/sysdeps/am33/linuxthreads/pspinlock.c @@ -0,0 +1,73 @@ +/* POSIX spinlock implementation. AM33 version. + Copyright 2001 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. If not, see + <http://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <pthread.h> +#include "internals.h" + +int +__pthread_spin_lock (pthread_spinlock_t *lock) +{ + __asm__ __volatile__("1: bset %1, (%0); beq 1b" + : : "a" (lock), "d" (1) : "memory"); + return 0; +} +weak_alias (__pthread_spin_lock, pthread_spin_lock) + + +int +__pthread_spin_trylock (pthread_spinlock_t *lock) +{ + int oldval = 1; + + __asm__ __volatile__ ("bset %0, (%1); beq 1f; clr %0; 1:" : + "+d" (oldval) : "a" (lock) : "memory"); + + return oldval ? EBUSY : 0; +} +weak_alias (__pthread_spin_trylock, pthread_spin_trylock) + + +int +__pthread_spin_unlock (pthread_spinlock_t *lock) +{ + *lock = 0; + 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) diff --git a/ports/sysdeps/am33/linuxthreads/pt-machine.h b/ports/sysdeps/am33/linuxthreads/pt-machine.h new file mode 100644 index 0000000000..86d0f8b1e1 --- /dev/null +++ b/ports/sysdeps/am33/linuxthreads/pt-machine.h @@ -0,0 +1,67 @@ +/* Machine-dependent pthreads configuration and inline functions. + am33 version. + Copyright (C) 1996,1997,1998,1999,2000,2001, 2004 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Alexandre Oliva <aoliva@redhat.com> + Based on ../i386/pt-machine.h. + + 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. If not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _PT_MACHINE_H +#define _PT_MACHINE_H 1 + +#ifndef __ASSEMBLER__ +#ifndef PT_EI +# define PT_EI extern inline +#endif + +/* 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 = 1; + + /* This won't test&set the entire int, only the least significant + byte. I hope this doesn't matter, since we can't do better. */ + __asm__ __volatile__ ("bset %0, %1; bne 1f; clr %0; 1:" : + "+d" (ret), "+m" (*(volatile int *)spinlock)); + + return ret; +} + + +PT_EI int +get_eflags (void) +{ + int res; + __asm__ __volatile__ ("mov psw,%0" : "=d" (res)); + return res; +} + + +PT_EI void +set_eflags (int newflags) +{ + __asm__ __volatile__ ("mov %0,psw" : : "d" (newflags) : "cc"); +} + +#endif /* __ASSEMBLER__ */ + +#endif /* pt-machine.h */ |