1 files changed, 235 insertions, 0 deletions
diff --git a/linuxthreads/specific.c b/linuxthreads/specific.c
new file mode 100644
index 0000000000..f54fabaeb9
--- /dev/null
+++ b/linuxthreads/specific.c
@@ -0,0 +1,235 @@
+/* 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.                 */
+
+/* Thread-specific data */
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include "pthread.h"
+#include "internals.h"
+#include "spinlock.h"
+#include "restart.h"
+#include <bits/libc-lock.h>
+#include <not-cancel.h>
+
+/* Table of keys. */
+
+static struct pthread_key_struct pthread_keys[PTHREAD_KEYS_MAX] =
+  { { 0, NULL } };
+
+/* For debugging purposes put the maximum number of keys in a variable.  */
+const int __linuxthreads_pthread_keys_max = PTHREAD_KEYS_MAX;
+const int __linuxthreads_pthread_key_2ndlevel_size = PTHREAD_KEY_2NDLEVEL_SIZE;
+
+/* 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)
+
+/* Reset deleted key's value to NULL in each live thread.
+ * NOTE: this executes in the context of the thread manager! */
+
+struct pthread_key_delete_helper_args {
+  /* Damn, we need lexical closures in C! ;) */
+  unsigned int idx1st, idx2nd;
+  pthread_descr self;
+};
+
+static void pthread_key_delete_helper(void *arg, pthread_descr th)
+{
+  struct pthread_key_delete_helper_args *args = arg;
+  unsigned int idx1st = args->idx1st;
+  unsigned int idx2nd = args->idx2nd;
+  pthread_descr self = args->self;
+
+  if (self == 0)
+    self = args->self = thread_self();
+
+  if (!th->p_terminated) {
+    /* pthread_exit() may try to free th->p_specific[idx1st] concurrently. */
+    __pthread_lock(th->p_lock, self);
+    if (th->p_specific[idx1st] != NULL)
+      th->p_specific[idx1st][idx2nd] = NULL;
+    __pthread_unlock(th->p_lock);
+  }
+}
+
+/* Delete a key */
+int pthread_key_delete(pthread_key_t key)
+{
+  pthread_descr self = thread_self();
+
+  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.
+
+     Do nothing if no threads have been created yet.  */
+
+  if (__pthread_manager_request != -1)
+    {
+      struct pthread_key_delete_helper_args args;
+      struct pthread_request request;
+
+      args.idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
+      args.idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
+      args.self = 0;
+
+      request.req_thread = self;
+      request.req_kind = REQ_FOR_EACH_THREAD;
+      request.req_args.for_each.arg = &args;
+      request.req_args.for_each.fn = pthread_key_delete_helper;
+
+      TEMP_FAILURE_RETRY(write_not_cancel(__pthread_manager_request,
+					  (char *) &request, sizeof(request)));
+      suspend(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;
+          }
+        }
+  }
+  __pthread_lock(THREAD_GETMEM(self, p_lock), self);
+  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_SETMEM_NC(self, p_specific[i], NULL);
+    }
+  }
+  __pthread_unlock(THREAD_GETMEM(self, p_lock));
+}
+
+#if !(USE_TLS && HAVE___THREAD)
+
+/* Thread-specific data for libc. */
+
+int
+__pthread_internal_tsd_set (int key, const void * pointer)
+{
+  pthread_descr self = thread_self();
+
+  THREAD_SETMEM_NC(self, p_libc_specific[key], (void *) pointer);
+  return 0;
+}
+
+void *
+__pthread_internal_tsd_get (int key)
+{
+  pthread_descr self = thread_self();
+
+  return THREAD_GETMEM_NC(self, p_libc_specific[key]);
+}
+
+void ** __attribute__ ((__const__))
+__pthread_internal_tsd_address (int key)
+{
+  pthread_descr self = thread_self();
+  return &self->p_libc_specific[key];
+}
+
+#endif