resolve merge

1 files changed, 0 insertions, 362 deletions

diff --git a/libpthread/linuxthreads.old/mutex.c b/libpthread/linuxthreads.old/mutex.c
deleted file mode 100644
index 890841452..000000000
--- a/libpthread/linuxthreads.old/mutex.c
+++ /dev/null
@@ -1,362 +0,0 @@
-/* Linuxthreads - a simple clone()-based implementation of Posix        */
-/* threads for Linux.                                                   */
-/* Copyright (C) 1996 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.                 */
-
-/* Mutexes */
-
-#include <errno.h>
-#include <sched.h>
-#include <stddef.h>
-#include <limits.h>
-#include "pthread.h"
-#include "internals.h"
-#include "spinlock.h"
-#include "queue.h"
-#include "restart.h"
-
-int attribute_hidden __pthread_mutex_init(pthread_mutex_t * mutex,
-                       const pthread_mutexattr_t * mutex_attr)
-{
-  __pthread_init_lock(&mutex->__m_lock);
-  mutex->__m_kind =
-    mutex_attr == NULL ? PTHREAD_MUTEX_TIMED_NP : mutex_attr->__mutexkind;
-  mutex->__m_count = 0;
-  mutex->__m_owner = NULL;
-  return 0;
-}
-strong_alias (__pthread_mutex_init, pthread_mutex_init)
-
-int attribute_hidden __pthread_mutex_destroy(pthread_mutex_t * mutex)
-{
-  switch (mutex->__m_kind) {
-  case PTHREAD_MUTEX_ADAPTIVE_NP:
-  case PTHREAD_MUTEX_RECURSIVE_NP:
-    if ((mutex->__m_lock.__status & 1) != 0)
-      return EBUSY;
-    return 0;
-  case PTHREAD_MUTEX_ERRORCHECK_NP:
-  case PTHREAD_MUTEX_TIMED_NP:
-    if (mutex->__m_lock.__status != 0)
-      return EBUSY;
-    return 0;
-  default:
-    return EINVAL;
-  }
-}
-strong_alias (__pthread_mutex_destroy, pthread_mutex_destroy)
-
-int attribute_hidden __pthread_mutex_trylock(pthread_mutex_t * mutex)
-{
-  pthread_descr self;
-  int retcode;
-
-  switch(mutex->__m_kind) {
-  case PTHREAD_MUTEX_ADAPTIVE_NP:
-    retcode = __pthread_trylock(&mutex->__m_lock);
-    return retcode;
-  case PTHREAD_MUTEX_RECURSIVE_NP:
-    self = thread_self();
-    if (mutex->__m_owner == self) {
-      mutex->__m_count++;
-      return 0;
-    }
-    retcode = __pthread_trylock(&mutex->__m_lock);
-    if (retcode == 0) {
-      mutex->__m_owner = self;
-      mutex->__m_count = 0;
-    }
-    return retcode;
-  case PTHREAD_MUTEX_ERRORCHECK_NP:
-    retcode = __pthread_alt_trylock(&mutex->__m_lock);
-    if (retcode == 0) {
-      mutex->__m_owner = thread_self();
-    }
-    return retcode;
-  case PTHREAD_MUTEX_TIMED_NP:
-    retcode = __pthread_alt_trylock(&mutex->__m_lock);
-    return retcode;
-  default:
-    return EINVAL;
-  }
-}
-strong_alias (__pthread_mutex_trylock, pthread_mutex_trylock)
-
-int attribute_hidden __pthread_mutex_lock(pthread_mutex_t * mutex)
-{
-  pthread_descr self;
-
-  switch(mutex->__m_kind) {
-  case PTHREAD_MUTEX_ADAPTIVE_NP:
-    __pthread_lock(&mutex->__m_lock, NULL);
-    return 0;
-  case PTHREAD_MUTEX_RECURSIVE_NP:
-    self = thread_self();
-    if (mutex->__m_owner == self) {
-      mutex->__m_count++;
-      return 0;
-    }
-    __pthread_lock(&mutex->__m_lock, self);
-    mutex->__m_owner = self;
-    mutex->__m_count = 0;
-    return 0;
-  case PTHREAD_MUTEX_ERRORCHECK_NP:
-    self = thread_self();
-    if (mutex->__m_owner == self) return EDEADLK;
-    __pthread_alt_lock(&mutex->__m_lock, self);
-    mutex->__m_owner = self;
-    return 0;
-  case PTHREAD_MUTEX_TIMED_NP:
-    __pthread_alt_lock(&mutex->__m_lock, NULL);
-    return 0;
-  default:
-    return EINVAL;
-  }
-}
-strong_alias (__pthread_mutex_lock, pthread_mutex_lock)
-
-int pthread_mutex_timedlock (pthread_mutex_t *mutex,
-			       const struct timespec *abstime)
-{
-  pthread_descr self;
-  int res;
-
-  if (__builtin_expect (abstime->tv_nsec, 0) < 0
-      || __builtin_expect (abstime->tv_nsec, 0) >= 1000000000)
-    return EINVAL;
-
-  switch(mutex->__m_kind) {
-  case PTHREAD_MUTEX_ADAPTIVE_NP:
-    __pthread_lock(&mutex->__m_lock, NULL);
-    return 0;
-  case PTHREAD_MUTEX_RECURSIVE_NP:
-    self = thread_self();
-    if (mutex->__m_owner == self) {
-      mutex->__m_count++;
-      return 0;
-    }
-    __pthread_lock(&mutex->__m_lock, self);
-    mutex->__m_owner = self;
-    mutex->__m_count = 0;
-    return 0;
-  case PTHREAD_MUTEX_ERRORCHECK_NP:
-    self = thread_self();
-    if (mutex->__m_owner == self) return EDEADLK;
-    res = __pthread_alt_timedlock(&mutex->__m_lock, self, abstime);
-    if (res != 0)
-      {
-	mutex->__m_owner = self;
-	return 0;
-      }
-    return ETIMEDOUT;
-  case PTHREAD_MUTEX_TIMED_NP:
-    /* Only this type supports timed out lock. */
-    return (__pthread_alt_timedlock(&mutex->__m_lock, NULL, abstime)
-	    ? 0 : ETIMEDOUT);
-  default:
-    return EINVAL;
-  }
-}
-
-int attribute_hidden __pthread_mutex_unlock(pthread_mutex_t * mutex)
-{
-  switch (mutex->__m_kind) {
-  case PTHREAD_MUTEX_ADAPTIVE_NP:
-    __pthread_unlock(&mutex->__m_lock);
-    return 0;
-  case PTHREAD_MUTEX_RECURSIVE_NP:
-    if (mutex->__m_owner != thread_self())
-      return EPERM;
-    if (mutex->__m_count > 0) {
-      mutex->__m_count--;
-      return 0;
-    }
-    mutex->__m_owner = NULL;
-    __pthread_unlock(&mutex->__m_lock);
-    return 0;
-  case PTHREAD_MUTEX_ERRORCHECK_NP:
-    if (mutex->__m_owner != thread_self() || mutex->__m_lock.__status == 0)
-      return EPERM;
-    mutex->__m_owner = NULL;
-    __pthread_alt_unlock(&mutex->__m_lock);
-    return 0;
-  case PTHREAD_MUTEX_TIMED_NP:
-    __pthread_alt_unlock(&mutex->__m_lock);
-    return 0;
-  default:
-    return EINVAL;
-  }
-}
-strong_alias (__pthread_mutex_unlock, pthread_mutex_unlock)
-
-int attribute_hidden __pthread_mutexattr_init(pthread_mutexattr_t *attr)
-{
-  attr->__mutexkind = PTHREAD_MUTEX_TIMED_NP;
-  return 0;
-}
-strong_alias(__pthread_mutexattr_init,pthread_mutexattr_init)
-
-int attribute_hidden __pthread_mutexattr_destroy(pthread_mutexattr_t *attr attribute_unused)
-{
-  return 0;
-}
-strong_alias(__pthread_mutexattr_destroy,pthread_mutexattr_destroy)
-
-int attribute_hidden __pthread_mutexattr_settype(pthread_mutexattr_t *attr, int kind)
-{
-  if (kind != PTHREAD_MUTEX_ADAPTIVE_NP
-      && kind != PTHREAD_MUTEX_RECURSIVE_NP
-      && kind != PTHREAD_MUTEX_ERRORCHECK_NP
-      && kind != PTHREAD_MUTEX_TIMED_NP)
-    return EINVAL;
-  attr->__mutexkind = kind;
-  return 0;
-}
-strong_alias(__pthread_mutexattr_settype,pthread_mutexattr_settype)
-strong_alias (__pthread_mutexattr_settype, __pthread_mutexattr_setkind_np)
-weak_alias (__pthread_mutexattr_setkind_np, pthread_mutexattr_setkind_np)
-
-int __pthread_mutexattr_gettype(const pthread_mutexattr_t *attr, int *kind) attribute_hidden;
-int __pthread_mutexattr_gettype(const pthread_mutexattr_t *attr, int *kind)
-{
-  *kind = attr->__mutexkind;
-  return 0;
-}
-weak_alias (__pthread_mutexattr_gettype, pthread_mutexattr_gettype)
-strong_alias (__pthread_mutexattr_gettype, __pthread_mutexattr_getkind_np)
-weak_alias (__pthread_mutexattr_getkind_np, pthread_mutexattr_getkind_np)
-
-int __pthread_mutexattr_getpshared (const pthread_mutexattr_t *attr attribute_unused,
-				   int *pshared) attribute_hidden;
-int __pthread_mutexattr_getpshared (const pthread_mutexattr_t *attr attribute_unused,
-				   int *pshared)
-{
-  *pshared = PTHREAD_PROCESS_PRIVATE;
-  return 0;
-}
-weak_alias (__pthread_mutexattr_getpshared, pthread_mutexattr_getpshared)
-
-int __pthread_mutexattr_setpshared (pthread_mutexattr_t *attr attribute_unused, int pshared) attribute_hidden;
-int __pthread_mutexattr_setpshared (pthread_mutexattr_t *attr attribute_unused, int pshared)
-{
-  if (pshared != PTHREAD_PROCESS_PRIVATE && pshared != PTHREAD_PROCESS_SHARED)
-    return EINVAL;
-
-  /* For now it is not possible to shared a conditional variable.  */
-  if (pshared != PTHREAD_PROCESS_PRIVATE)
-    return ENOSYS;
-
-  return 0;
-}
-weak_alias (__pthread_mutexattr_setpshared, pthread_mutexattr_setpshared)
-
-/* Once-only execution */
-
-static pthread_mutex_t once_masterlock = PTHREAD_MUTEX_INITIALIZER;
-static pthread_cond_t once_finished = PTHREAD_COND_INITIALIZER;
-static int fork_generation = 0;	/* Child process increments this after fork. */
-
-enum { NEVER = 0, IN_PROGRESS = 1, DONE = 2 };
-
-/* If a thread is canceled while calling the init_routine out of
-   pthread once, this handler will reset the once_control variable
-   to the NEVER state. */
-
-static void pthread_once_cancelhandler(void *arg)
-{
-    pthread_once_t *once_control = arg;
-
-    __pthread_mutex_lock(&once_masterlock);
-    *once_control = NEVER;
-    __pthread_mutex_unlock(&once_masterlock);
-    pthread_cond_broadcast(&once_finished);
-}
-
-int __pthread_once(pthread_once_t * once_control, void (*init_routine)(void))
-{
-  /* flag for doing the condition broadcast outside of mutex */
-  int state_changed;
-
-  /* Test without locking first for speed */
-  if (*once_control == DONE) {
-    READ_MEMORY_BARRIER();
-    return 0;
-  }
-  /* Lock and test again */
-
-  state_changed = 0;
-
-  __pthread_mutex_lock(&once_masterlock);
-
-  /* If this object was left in an IN_PROGRESS state in a parent
-     process (indicated by stale generation field), reset it to NEVER. */
-  if ((*once_control & 3) == IN_PROGRESS && (*once_control & ~3) != fork_generation)
-    *once_control = NEVER;
-
-  /* If init_routine is being called from another routine, wait until
-     it completes. */
-  while ((*once_control & 3) == IN_PROGRESS) {
-    pthread_cond_wait(&once_finished, &once_masterlock);
-  }
-  /* Here *once_control is stable and either NEVER or DONE. */
-  if (*once_control == NEVER) {
-    *once_control = IN_PROGRESS | fork_generation;
-    __pthread_mutex_unlock(&once_masterlock);
-    pthread_cleanup_push(pthread_once_cancelhandler, once_control);
-    init_routine();
-    pthread_cleanup_pop(0);
-    __pthread_mutex_lock(&once_masterlock);
-    WRITE_MEMORY_BARRIER();
-    *once_control = DONE;
-    state_changed = 1;
-  }
-  __pthread_mutex_unlock(&once_masterlock);
-
-  if (state_changed)
-    pthread_cond_broadcast(&once_finished);
-
-  return 0;
-}
-strong_alias (__pthread_once, pthread_once)
-
-/*
- * Handle the state of the pthread_once mechanism across forks.  The
- * once_masterlock is acquired in the parent process prior to a fork to ensure
- * that no thread is in the critical region protected by the lock.  After the
- * fork, the lock is released. In the child, the lock and the condition
- * variable are simply reset.  The child also increments its generation
- * counter which lets pthread_once calls detect stale IN_PROGRESS states
- * and reset them back to NEVER.
- */
-
-void __pthread_once_fork_prepare(void);
-void __pthread_once_fork_prepare(void)
-{
-  __pthread_mutex_lock(&once_masterlock);
-}
-
-void __pthread_once_fork_parent(void);
-void __pthread_once_fork_parent(void)
-{
-  __pthread_mutex_unlock(&once_masterlock);
-}
-
-void __pthread_once_fork_child(void);
-void __pthread_once_fork_child(void)
-{
-  __pthread_mutex_init(&once_masterlock, NULL);
-  pthread_cond_init(&once_finished, NULL);
-  if (fork_generation <= INT_MAX - 4)
-    fork_generation += 4;	/* leave least significant two bits zero */
-  else
-    fork_generation = 0;
-}