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-rw-r--r--libpthread/linuxthreads.old/spinlock.h218
1 files changed, 0 insertions, 218 deletions
diff --git a/libpthread/linuxthreads.old/spinlock.h b/libpthread/linuxthreads.old/spinlock.h
deleted file mode 100644
index 7117898f7..000000000
--- a/libpthread/linuxthreads.old/spinlock.h
+++ /dev/null
@@ -1,218 +0,0 @@
-/* Linuxthreads - a simple clone()-based implementation of Posix */
-/* threads for Linux. */
-/* Copyright (C) 1998 Xavier Leroy (Xavier.Leroy@inria.fr) */
-/* */
-/* This program 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. */
-/* */
-/* This program 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. */
-
-#include <bits/initspin.h>
-
-
-/* There are 2 compare and swap synchronization primitives with
- different semantics:
-
- 1. compare_and_swap, which has acquire semantics (i.e. it
- completes befor subsequent writes.)
- 2. compare_and_swap_with_release_semantics, which has release
- semantics (it completes after previous writes.)
-
- For those platforms on which they are the same. HAS_COMPARE_AND_SWAP
- should be defined. For those platforms on which they are different,
- HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS has to be defined. */
-
-#ifndef HAS_COMPARE_AND_SWAP
-#ifdef HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS
-#define HAS_COMPARE_AND_SWAP
-#endif
-#endif
-
-#if defined(TEST_FOR_COMPARE_AND_SWAP)
-
-extern int __pthread_has_cas;
-extern int __pthread_compare_and_swap(long * ptr, long oldval, long newval,
- int * spinlock);
-
-static __inline__ int compare_and_swap(long * ptr, long oldval, long newval,
- int * spinlock)
-{
- if (__builtin_expect (__pthread_has_cas, 1))
- return __compare_and_swap(ptr, oldval, newval);
- else
- return __pthread_compare_and_swap(ptr, oldval, newval, spinlock);
-}
-
-#elif defined(HAS_COMPARE_AND_SWAP)
-
-#ifdef IMPLEMENT_TAS_WITH_CAS
-#define testandset(p) !__compare_and_swap((long int *) p, 0, 1)
-#endif
-
-#ifdef HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS
-
-static __inline__ int
-compare_and_swap_with_release_semantics (long * ptr, long oldval,
- long newval, int * spinlock)
-{
- return __compare_and_swap_with_release_semantics (ptr, oldval,
- newval);
-}
-
-#endif
-
-static __inline__ int compare_and_swap(long * ptr, long oldval, long newval,
- int * spinlock)
-{
- return __compare_and_swap(ptr, oldval, newval);
-}
-
-#else
-
-extern int __pthread_compare_and_swap(long * ptr, long oldval, long newval,
- int * spinlock);
-
-static __inline__ int compare_and_swap(long * ptr, long oldval, long newval,
- int * spinlock)
-{
- return __pthread_compare_and_swap(ptr, oldval, newval, spinlock);
-}
-
-#endif
-
-#ifndef HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS
-#define compare_and_swap_with_release_semantics compare_and_swap
-#define __compare_and_swap_with_release_semantics __compare_and_swap
-#endif
-
-/* Internal locks */
-
-extern void internal_function __pthread_lock(struct _pthread_fastlock * lock,
- pthread_descr self);
-extern int __pthread_unlock(struct _pthread_fastlock *lock);
-
-static __inline__ void __pthread_init_lock(struct _pthread_fastlock * lock)
-{
- lock->__status = 0;
- lock->__spinlock = __LT_SPINLOCK_INIT;
-}
-
-static __inline__ int __pthread_trylock (struct _pthread_fastlock * lock)
-{
-#if defined TEST_FOR_COMPARE_AND_SWAP
- if (!__pthread_has_cas)
-#endif
-#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP
- {
- return (testandset(&lock->__spinlock) ? EBUSY : 0);
- }
-#endif
-
-#if defined HAS_COMPARE_AND_SWAP
- do {
- if (lock->__status != 0) return EBUSY;
- } while(! __compare_and_swap(&lock->__status, 0, 1));
- return 0;
-#endif
-}
-
-/* Variation of internal lock used for pthread_mutex_t, supporting
- timed-out waits. Warning: do not mix these operations with the above ones
- over the same lock object! */
-
-extern void __pthread_alt_lock(struct _pthread_fastlock * lock,
- pthread_descr self);
-
-extern int __pthread_alt_timedlock(struct _pthread_fastlock * lock,
- pthread_descr self, const struct timespec *abstime);
-
-extern void __pthread_alt_unlock(struct _pthread_fastlock *lock);
-
-static __inline__ void __pthread_alt_init_lock(struct _pthread_fastlock * lock)
-{
- lock->__status = 0;
- lock->__spinlock = __LT_SPINLOCK_INIT;
-}
-
-static __inline__ int __pthread_alt_trylock (struct _pthread_fastlock * lock)
-{
-#if defined TEST_FOR_COMPARE_AND_SWAP
- if (!__pthread_has_cas)
-#endif
-#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP
- {
- int res = EBUSY;
-
- if (testandset(&lock->__spinlock) == 0)
- {
- if (lock->__status == 0)
- {
- lock->__status = 1;
- WRITE_MEMORY_BARRIER();
- res = 0;
- }
- lock->__spinlock = __LT_SPINLOCK_INIT;
- }
- return res;
- }
-#endif
-
-#if defined HAS_COMPARE_AND_SWAP
- do {
- if (lock->__status != 0) return EBUSY;
- } while(! compare_and_swap(&lock->__status, 0, 1, &lock->__spinlock));
- return 0;
-#endif
-}
-
-/* Operations on pthread_atomic, which is defined in internals.h */
-
-static __inline__ long atomic_increment(struct pthread_atomic *pa)
-{
- long oldval;
-
- do {
- oldval = pa->p_count;
- } while (!compare_and_swap(&pa->p_count, oldval, oldval + 1, &pa->p_spinlock));
-
- return oldval;
-}
-
-
-static __inline__ long atomic_decrement(struct pthread_atomic *pa)
-{
- long oldval;
-
- do {
- oldval = pa->p_count;
- } while (!compare_and_swap(&pa->p_count, oldval, oldval - 1, &pa->p_spinlock));
-
- return oldval;
-}
-
-
-static __inline__ void
-__pthread_set_own_extricate_if (pthread_descr self, pthread_extricate_if *peif)
-{
- /* Only store a non-null peif if the thread has cancellation enabled.
- Otherwise pthread_cancel will unconditionally call the extricate handler,
- and restart the thread giving rise to forbidden spurious wakeups. */
- if (peif == NULL
- || THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE)
- {
- /* If we are removing the extricate interface, we need to synchronize
- against pthread_cancel so that it does not continue with a pointer
- to a deallocated pthread_extricate_if struct! The thread lock
- is (ab)used for this synchronization purpose. */
- if (peif == NULL)
- __pthread_lock (THREAD_GETMEM(self, p_lock), self);
- THREAD_SETMEM(self, p_extricate, peif);
- if (peif == NULL)
- __pthread_unlock (THREAD_GETMEM(self, p_lock));
- }
-}
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