core: Use gpgrt locking for thread safeness

* configure.ac: Require libgpg-error 1.17. No longer
check for pthread.
* doc/gpgme.texi: Document removed neccessity for thread
safe gpgme flavours.
* src/sema.h (DEFINE_GLOBAL_LOCK),
(DEFINE_STATIC_LOCK, INIT_LOCK, DECLARE_LOCK)
(DESTROY_LOCK, LOCK, UNLOCK): Change to gpgrt equivalents.
* src/posix-sema.c, src/w32-sema.c: Removed.
* src/Makefile.am: Remove libpthread and
Update accordingly.
* src/ath.c, src/ath.h (ath_mutex_init)
(ath_mutex_destroy, ath_mutex_lock, ath_mutex_unlock): Removed.
* src/ath.h (ATH_MUTEX_INITIALIZER): Removed.
* src/version.c (do_subsystem_inits): sema_subsystem_init is
no longer required.
* tests/gpg/Makefile.am: Add new threading tests.
(t_thread1_LDADD, t_cancel_LDADD):
Use just gpgme.
* tests/gpg/t-thread-keylist-verify.c,
tests/gpg/t-thread-keylist.c: New.
* src/gpgme-config.in: Use -lgpgme for thread-model pthread.

--
Using gpgrt locks instead of pthread locks removes
the neccessity to link pthread directly to gpgme and
have a different, thread safe flavor of gpgme. Now
gpgme is thread-safe if the conditions mentioned
in the doc are met.

As the cpp bindings linked against libgpgme
and not libgpgme-pthread this fixes threading problems
with them.

libgpgme-pthread is removed but gpgme-config still supports
--thread=pthread for compatibility with find scripts.

1 files changed, 0 insertions, 188 deletions

diff --git a/src/ath-pthread.c b/src/ath-pthread.c
deleted file mode 100644
index 47b38ee0..00000000
--- a/src/ath-pthread.c
+++ /dev/null
@@ -1,188 +0,0 @@
-/* ath-pthread.c - pthread module for self-adapting thread-safeness library
-   Copyright (C) 2002, 2003, 2004 g10 Code GmbH
-
-   This file is part of GPGME.
-
-   GPGME 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.
-
-   GPGME 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with this program; 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 <stdlib.h>
-#include <errno.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-#ifdef HAVE_SYS_SELECT_H
-# include <sys/select.h>
-#else
-# ifdef HAVE_SYS_TIME_H
-#  include <sys/time.h>
-# endif
-#endif
-#include <sys/types.h>
-#include <sys/wait.h>
-
-#include <pthread.h>
-
-#include "gpgme.h"
-
-#include "ath.h"
-
-
-/* The lock we take while checking for lazy lock initialization.  */
-static pthread_mutex_t check_init_lock = PTHREAD_MUTEX_INITIALIZER;
-
-/* Initialize the mutex *PRIV.  If JUST_CHECK is true, only do this if
-   it is not already initialized.  */
-static int
-mutex_pthread_init (ath_mutex_t *priv, int just_check)
-{
-  int err = 0;
-
-  if (just_check)
-    pthread_mutex_lock (&check_init_lock);
-  if (!*priv || !just_check)
-    {
-      pthread_mutex_t *lock = malloc (sizeof (pthread_mutex_t));
-      if (!lock)
-	err = ENOMEM;
-      if (!err)
-	{
-	  err = pthread_mutex_init (lock, NULL);
-	  if (err)
-	    free (lock);
-	  else
-	    *priv = (ath_mutex_t) lock;
-	}
-    }
-  if (just_check)
-    pthread_mutex_unlock (&check_init_lock);
-  return err;
-}
-
-
-void
-ath_init (void)
-{
-  /* Nothing to do.  */
-}
-
-
-uintptr_t
-ath_self (void)
-{
-  return (uintptr_t) pthread_self ();
-}
-
-
-int
-ath_mutex_init (ath_mutex_t *lock)
-{
-  return mutex_pthread_init (lock, 0);
-}
-
-
-int
-ath_mutex_destroy (ath_mutex_t *lock)
-{
-  int err = mutex_pthread_init (lock, 1);
-  if (!err)
-    {
-      err = pthread_mutex_destroy ((pthread_mutex_t *) *lock);
-      free (*lock);
-    }
-  return err;
-}
-
-
-int
-ath_mutex_lock (ath_mutex_t *lock)
-{
-  int ret = mutex_pthread_init (lock, 1);
-  if (ret)
-    return ret;
-
-  return pthread_mutex_lock ((pthread_mutex_t *) *lock);
-}
-
-
-int
-ath_mutex_unlock (ath_mutex_t *lock)
-{
-  int ret = mutex_pthread_init (lock, 1);
-  if (ret)
-    return ret;
-
-  return pthread_mutex_unlock ((pthread_mutex_t *) *lock);
-}
-
-
-gpgme_ssize_t
-ath_read (int fd, void *buf, size_t nbytes)
-{
-  return read (fd, buf, nbytes);
-}
-
-
-gpgme_ssize_t
-ath_write (int fd, const void *buf, size_t nbytes)
-{
-  return write (fd, buf, nbytes);
-}
-
-
-gpgme_ssize_t
-ath_select (int nfd, fd_set *rset, fd_set *wset, fd_set *eset,
-	    struct timeval *timeout)
-{
-  return select (nfd, rset, wset, eset, timeout);
-}
-
-
-gpgme_ssize_t
-ath_waitpid (pid_t pid, int *status, int options)
-{
-  return waitpid (pid, status, options);
-}
-
-
-int
-ath_accept (int s, struct sockaddr *addr, socklen_t *length_ptr)
-{
-  return accept (s, addr, length_ptr);
-}
-
-
-int
-ath_connect (int s, const struct sockaddr *addr, socklen_t length)
-{
-  return connect (s, addr, length);
-}
-
-int
-ath_sendmsg (int s, const struct msghdr *msg, int flags)
-{
-  return sendmsg (s, msg, flags);
-}
-
-
-int
-ath_recvmsg (int s, struct msghdr *msg, int flags)
-{
-  return recvmsg (s, msg, flags);
-}