aboutsummaryrefslogtreecommitdiffstats
path: root/gpgme/mutex.h
diff options
context:
space:
mode:
Diffstat (limited to 'gpgme/mutex.h')
-rw-r--r--gpgme/mutex.h124
1 files changed, 0 insertions, 124 deletions
diff --git a/gpgme/mutex.h b/gpgme/mutex.h
deleted file mode 100644
index a1cf868b..00000000
--- a/gpgme/mutex.h
+++ /dev/null
@@ -1,124 +0,0 @@
-/* mutex.h - Portable mutual exclusion, independent from any thread library.
- * Copyright (C) 2002 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 General Public License as published by
- * the Free Software Foundation; either version 2 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 General Public License for more details.
- *
- * You should have received a copy of the GNU 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
- */
-
-#ifndef MUTEX_H
-#define MUTEX_H
-
-/* Define MUTEX_FAKE before including the file to get stubs that don't
- provide any locking at all. Define MUTEX_PTHREAD if you can link
- against the posix thread library. */
-
-#if defined(MUTEX_FAKE)
-
-typedef char mutex_t;
-#define mutex_init(x) (0)
-#define mutex_destroy(x)
-#define mutex_lock(x) (0)
-#define mutex_unlock(x) (0)
-
-#elif defined(MUTEX_PTHREAD)
-
-#include <pthread.h>
-
-#define mutex_t pthread_mutex_t
-#define mutex_init(x) pthread_mutex_init (&(x), 0)
-#define mutex_destroy(x) pthread_mutex_destroy(&(x))
-#define mutex_lock(x) pthread_mutex_lock (&(x))
-#define mutex_unlock(x) pthread_mutex_unlock (&(x))
-
-#else
-
-#include <errno.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-/* The type of a mutex. */
-typedef int mutex_t[2];
-
-inline static int
-set_close_on_exec (int fd)
-{
- int flags = fcntl (fd, F_GETFD, 0);
- if (flags == -1)
- return errno;
- flags |= FD_CLOEXEC;
- if (fcntl (fd, F_SETFD, flags) == -1)
- return errno;
- return 0;
-}
-
-/* Initialize the mutex variable MUTEX. */
-inline int
-mutex_init (mutex_t mutex)
-{
- ssize_t amount;
- int err = 0;
-
- if (pipe (mutex))
- return errno;
-
- err = set_close_on_exec (mutex[0]);
- if (!err)
- err = set_close_on_exec (mutex[1]);
- if (!err)
- while ((amount = write (mutex[1], " ", 1)) < 0 && errno == EINTR)
- ;
- if (!err && amount != 1)
- err = errno;
-
- if (err)
- {
- close (mutex[0]);
- close (mutex[1]);
- }
- return err;
-}
-
-/* Destroy the mutex variable MUTEX. */
-inline void
-mutex_destroy (mutex_t mutex)
-{
- close (mutex[0]);
- close (mutex[1]);
-}
-
-/* Take the mutex variable MUTEX. */
-inline int
-mutex_lock (mutex_t mutex)
-{
- char data;
- int amount;
- while ((amount = read (mutex[0], &data, 1)) < 0 && errno == EINTR)
- ;
- return (amount != 1) ? errno : 0;
-}
-
-/* Release the mutex variable MUTEX. */
-inline int
-mutex_unlock (mutex_t mutex)
-{
- int amount;
- while ((amount = write (mutex[1], " ", 1)) < 0 && errno == EINTR)
- ;
- return (amount != 1) ? errno : 0;
-}
-
-#endif /* MUTEX_FAKE */
-#endif /* MUTEX_H */