Merge in the pthread library. This is the linuxthreads library taken from

glibc 2.1.3 and ported to work with uClibc by Stefan Soucek and Erik Andersen
(me).  Stefan has hacked things up such that linuxthreads runs on MMU-less
systems (tested only on arm-nommu).  Erik cleaned things up and made it work
properly as a shared library.
 -Erik

1 files changed, 179 insertions, 0 deletions

diff --git a/libpthread/linuxthreads/specific.c b/libpthread/linuxthreads/specific.c
new file mode 100644
index 000000000..14c4b29d1
--- /dev/null
+++ b/libpthread/linuxthreads/specific.c
@@ -0,0 +1,179 @@
+/* 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.                 */
+
+/* mods for uClibc: removed strong_alias'es */
+
+/* Thread-specific data */
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include "pthread.h"
+#include "internals.h"
+
+/* Table of keys. */
+
+static struct pthread_key_struct pthread_keys[PTHREAD_KEYS_MAX] =
+  { { 0, NULL } };
+
+/* Mutex to protect access to pthread_keys */
+
+static pthread_mutex_t pthread_keys_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+/* Create a new key */
+
+int pthread_key_create(pthread_key_t * key, destr_function destr)
+{
+  int i;
+
+  pthread_mutex_lock(&pthread_keys_mutex);
+  for (i = 0; i < PTHREAD_KEYS_MAX; i++) {
+    if (! pthread_keys[i].in_use) {
+      /* Mark key in use */
+      pthread_keys[i].in_use = 1;
+      pthread_keys[i].destr = destr;
+      pthread_mutex_unlock(&pthread_keys_mutex);
+      *key = i;
+      return 0;
+    }
+  }
+  pthread_mutex_unlock(&pthread_keys_mutex);
+  return EAGAIN;
+}
+//strong_alias (__pthread_key_create, pthread_key_create)
+
+/* Delete a key */
+
+int pthread_key_delete(pthread_key_t key)
+{
+  pthread_descr self = thread_self();
+  pthread_descr th;
+  unsigned int idx1st, idx2nd;
+
+  pthread_mutex_lock(&pthread_keys_mutex);
+  if (key >= PTHREAD_KEYS_MAX || !pthread_keys[key].in_use) {
+    pthread_mutex_unlock(&pthread_keys_mutex);
+    return EINVAL;
+  }
+  pthread_keys[key].in_use = 0;
+  pthread_keys[key].destr = NULL;
+  /* Set the value of the key to NULL in all running threads, so
+     that if the key is reallocated later by pthread_key_create, its
+     associated values will be NULL in all threads. */
+  idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
+  idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
+  th = self;
+  do {
+    /* If the thread already is terminated don't modify the memory.  */
+    if (!th->p_terminated && th->p_specific[idx1st] != NULL)
+      th->p_specific[idx1st][idx2nd] = NULL;
+    th = th->p_nextlive;
+  } while (th != self);
+  pthread_mutex_unlock(&pthread_keys_mutex);
+  return 0;
+}
+
+/* Set the value of a key */
+
+int pthread_setspecific(pthread_key_t key, const void * pointer)
+{
+  pthread_descr self = thread_self();
+  unsigned int idx1st, idx2nd;
+
+  if (key >= PTHREAD_KEYS_MAX || !pthread_keys[key].in_use)
+    return EINVAL;
+  idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
+  idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
+  if (THREAD_GETMEM_NC(self, p_specific[idx1st]) == NULL) {
+    void *newp = calloc(PTHREAD_KEY_2NDLEVEL_SIZE, sizeof (void *));
+    if (newp == NULL)
+      return ENOMEM;
+    THREAD_SETMEM_NC(self, p_specific[idx1st], newp);
+  }
+  THREAD_GETMEM_NC(self, p_specific[idx1st])[idx2nd] = (void *) pointer;
+  return 0;
+}
+//strong_alias (__pthread_setspecific, pthread_setspecific)
+
+/* Get the value of a key */
+
+void * pthread_getspecific(pthread_key_t key)
+{
+  pthread_descr self = thread_self();
+  unsigned int idx1st, idx2nd;
+
+  if (key >= PTHREAD_KEYS_MAX)
+    return NULL;
+  idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
+  idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
+  if (THREAD_GETMEM_NC(self, p_specific[idx1st]) == NULL
+      || !pthread_keys[key].in_use)
+    return NULL;
+  return THREAD_GETMEM_NC(self, p_specific[idx1st])[idx2nd];
+}
+//strong_alias (__pthread_getspecific, pthread_getspecific)
+
+/* Call the destruction routines on all keys */
+
+void __pthread_destroy_specifics()
+{
+  pthread_descr self = thread_self();
+  int i, j, round, found_nonzero;
+  destr_function destr;
+  void * data;
+
+  for (round = 0, found_nonzero = 1;
+       found_nonzero && round < PTHREAD_DESTRUCTOR_ITERATIONS;
+       round++) {
+    found_nonzero = 0;
+    for (i = 0; i < PTHREAD_KEY_1STLEVEL_SIZE; i++)
+      if (THREAD_GETMEM_NC(self, p_specific[i]) != NULL)
+        for (j = 0; j < PTHREAD_KEY_2NDLEVEL_SIZE; j++) {
+          destr = pthread_keys[i * PTHREAD_KEY_2NDLEVEL_SIZE + j].destr;
+          data = THREAD_GETMEM_NC(self, p_specific[i])[j];
+          if (destr != NULL && data != NULL) {
+            THREAD_GETMEM_NC(self, p_specific[i])[j] = NULL;
+            destr(data);
+            found_nonzero = 1;
+          }
+        }
+  }
+  for (i = 0; i < PTHREAD_KEY_1STLEVEL_SIZE; i++) {
+    if (THREAD_GETMEM_NC(self, p_specific[i]) != NULL)
+      free(THREAD_GETMEM_NC(self, p_specific[i]));
+  }
+}
+
+/* Thread-specific data for libc. */
+
+static int
+libc_internal_tsd_set(enum __libc_tsd_key_t key, const void * pointer)
+{
+  pthread_descr self = thread_self();
+
+  THREAD_SETMEM_NC(self, p_libc_specific[key], (void *) pointer);
+  return 0;
+}
+int (*__libc_internal_tsd_set)(enum __libc_tsd_key_t key, const void * pointer)
+     = libc_internal_tsd_set;
+
+static void *
+libc_internal_tsd_get(enum __libc_tsd_key_t key)
+{
+  pthread_descr self = thread_self();
+
+  return THREAD_GETMEM_NC(self, p_libc_specific[key]);
+}
+void * (*__libc_internal_tsd_get)(enum __libc_tsd_key_t key)
+     = libc_internal_tsd_get;