1 files changed, 287 insertions, 0 deletions

diff --git a/pwmanager/libcrypt/crypt/ath.c b/pwmanager/libcrypt/crypt/ath.c
new file mode 100644
index 0000000..6788bba
--- a/dev/null
+++ b/pwmanager/libcrypt/crypt/ath.c
@@ -0,0 +1,287 @@
+/* ath.c - Thread-safeness library.
+   Copyright (C) 2002, 2003, 2004 g10 Code GmbH
+
+   This file is part of Libgcrypt.
+ 
+   Libgcrypt is free software; you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of
+   the License, or (at your option) any later version.
+ 
+   Libgcrypt 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
+   General Public License for more details.
+ 
+   You should have received a copy of the GNU Lesser General Public
+   License along with Libgcrypt; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <assert.h>
+#include <unistd.h>
+#ifdef HAVE_SYS_SELECT_H
+# include <sys/select.h>
+#else
+# include <sys/time.h>
+#endif
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <errno.h>
+
+#include "ath.h"
+
+
+/* The interface table.  */
+static struct ath_ops ops;
+
+/* True if we should use the external callbacks.  */
+static int ops_set;
+
+
+/* For the dummy interface.  */
+        #define MUTEX_UNLOCKED((ath_mutex_t) 0)
+        #define MUTEX_LOCKED((ath_mutex_t) 1)
+        #define MUTEX_DESTROYED((ath_mutex_t) 2)
+
+
+
+/* The lock we take while checking for lazy lock initialization.  */
+static ath_mutex_t check_init_lock = ATH_MUTEX_INITIALIZER;
+
+int
+ath_init (void)
+{
+  int err = 0;
+
+  if (ops_set)
+    {
+      if (ops.init)
+        err = (*ops.init) ();
+      if (err)
+        return err;
+      err = (*ops.mutex_init) (&check_init_lock);
+    }
+  return err;
+}
+
+
+/* Initialize the locking library.  Returns 0 if the operation was
+   successful, EINVAL if the operation table was invalid and EBUSY if
+   we already were initialized.  */
+gpg_err_code_t
+ath_install (struct ath_ops *ath_ops, int check_only)
+{
+  if (check_only)
+    {
+      enum ath_thread_option option = ATH_THREAD_OPTION_DEFAULT;
+      
+      /* Check if the requested thread option is compatible to the
+         thread option we are already committed to.  */
+      if (ath_ops)
+        option = ath_ops->option;
+
+      if (!ops_set && option)
+        return GPG_ERR_NOT_SUPPORTED;
+
+      if (ops.option == ATH_THREAD_OPTION_USER
+          || option == ATH_THREAD_OPTION_USER
+          || ops.option != option)
+        return GPG_ERR_NOT_SUPPORTED;
+
+      return 0;
+    }
+    
+  if (ath_ops)
+    {
+      /* It is convenient to not require DESTROY.  */
+      if (!ath_ops->mutex_init || !ath_ops->mutex_lock
+          || !ath_ops->mutex_unlock)
+        return GPG_ERR_INV_ARG;
+
+      ops = *ath_ops;
+      ops_set = 1;
+    }
+  else
+    ops_set = 0;
+
+  return 0;
+}
+
+
+static int
+mutex_init (ath_mutex_t *lock, int just_check)
+{
+  int err = 0;
+
+  if (just_check)
+    (*ops.mutex_lock) (&check_init_lock);
+  if (*lock == ATH_MUTEX_INITIALIZER || !just_check)
+    err = (*ops.mutex_init) (lock);
+  if (just_check)
+    (*ops.mutex_unlock) (&check_init_lock);
+  return err;
+}
+
+
+int
+ath_mutex_init (ath_mutex_t *lock)
+{
+  if (ops_set)
+    return mutex_init (lock, 0);
+
+#ifndef NDEBUG
+  *lock = MUTEX_UNLOCKED;
+#endif
+  return 0;
+}
+
+
+int
+ath_mutex_destroy (ath_mutex_t *lock)
+{
+  if (ops_set)
+    {
+      int err = mutex_init (lock, 1);
+
+      if (err)
+        return err;
+
+      if (ops.mutex_destroy)
+        return (*ops.mutex_destroy) (lock);
+      else
+        return 0;
+    }
+
+#ifndef NDEBUG
+  assert (*lock == MUTEX_UNLOCKED);
+
+  *lock = MUTEX_DESTROYED;
+#endif
+  return 0;
+}
+
+
+int
+ath_mutex_lock (ath_mutex_t *lock)
+{
+  if (ops_set)
+    {
+      int ret = mutex_init (lock, 1);
+      if (ret)
+        return ret;
+      return (*ops.mutex_lock) (lock);
+    }
+
+#ifndef NDEBUG
+  assert (*lock == MUTEX_UNLOCKED);
+
+  *lock = MUTEX_LOCKED;
+#endif
+  return 0;
+}
+
+
+int
+ath_mutex_unlock (ath_mutex_t *lock)
+{
+  if (ops_set)
+    {
+      int ret = mutex_init (lock, 1);
+      if (ret)
+        return ret;
+      return (*ops.mutex_unlock) (lock);
+    }
+
+#ifndef NDEBUG
+  assert (*lock == MUTEX_LOCKED);
+
+  *lock = MUTEX_UNLOCKED;
+#endif
+  return 0;
+}
+
+
+ssize_t
+ath_read (int fd, void *buf, size_t nbytes)
+{
+  if (ops_set && ops.read)
+    return (*ops.read) (fd, buf, nbytes);
+  else
+    return read (fd, buf, nbytes);
+}
+
+
+ssize_t
+ath_write (int fd, const void *buf, size_t nbytes)
+{
+  if (ops_set && ops.write)
+    return (*ops.write) (fd, buf, nbytes);
+  else
+    return write (fd, buf, nbytes);
+}
+
+
+ssize_t
+ath_select (int nfd, fd_set *rset, fd_set *wset, fd_set *eset,
+            struct timeval *timeout)
+{
+  if (ops_set && ops.select)
+    return (*ops.select) (nfd, rset, wset, eset, timeout);
+  else
+    return select (nfd, rset, wset, eset, timeout);
+}
+
+ 
+ssize_t
+ath_waitpid (pid_t pid, int *status, int options)
+{
+  if (ops_set && ops.waitpid)
+    return (*ops.waitpid) (pid, status, options);
+  else
+    return waitpid (pid, status, options);
+}
+
+
+int
+ath_accept (int s, struct sockaddr *addr, socklen_t *length_ptr)
+{
+  if (ops_set && ops.accept)
+    return (*ops.accept) (s, addr, length_ptr);
+  else
+    return accept (s, addr, length_ptr);
+}
+
+
+int
+ath_connect (int s, struct sockaddr *addr, socklen_t length)
+{
+  if (ops_set && ops.connect)
+    return (*ops.connect) (s, addr, length);
+  else
+    return connect (s, addr, length);
+}
+
+
+int
+ath_sendmsg (int s, const struct msghdr *msg, int flags)
+{
+  if (ops_set && ops.sendmsg)
+    return (*ops.sendmsg) (s, msg, flags);
+  else
+    return sendmsg (s, msg, flags);
+}
+
+
+int
+ath_recvmsg (int s, struct msghdr *msg, int flags)
+{
+  if (ops_set && ops.recvmsg)
+    return (*ops.recvmsg) (s, msg, flags);
+  else
+    return recvmsg (s, msg, flags);
+}