X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/39cc1c879e3d75b3cafd79e4e139a7f6673dd349..700d8687944db0a48535f818b59b6c9859952c61:/common/mbedtls/threading.c

diff --git a/common/mbedtls/threading.c b/common/mbedtls/threading.c
new file mode 100644
index 00000000..f7997ac9
--- /dev/null
+++ b/common/mbedtls/threading.c
@@ -0,0 +1,142 @@
+/*
+ *  Threading abstraction layer
+ *
+ *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ *  SPDX-License-Identifier: GPL-2.0
+ *
+ *  This program 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.
+ *
+ *  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 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.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ */
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#if defined(MBEDTLS_THREADING_C)
+
+#include "mbedtls/threading.h"
+
+#if defined(MBEDTLS_THREADING_PTHREAD)
+static void threading_mutex_init_pthread( mbedtls_threading_mutex_t *mutex )
+{
+    if( mutex == NULL )
+        return;
+
+    mutex->is_valid = pthread_mutex_init( &mutex->mutex, NULL ) == 0;
+}
+
+static void threading_mutex_free_pthread( mbedtls_threading_mutex_t *mutex )
+{
+    if( mutex == NULL || !mutex->is_valid )
+        return;
+
+    (void) pthread_mutex_destroy( &mutex->mutex );
+    mutex->is_valid = 0;
+}
+
+static int threading_mutex_lock_pthread( mbedtls_threading_mutex_t *mutex )
+{
+    if( mutex == NULL || ! mutex->is_valid )
+        return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
+
+    if( pthread_mutex_lock( &mutex->mutex ) != 0 )
+        return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
+
+    return( 0 );
+}
+
+static int threading_mutex_unlock_pthread( mbedtls_threading_mutex_t *mutex )
+{
+    if( mutex == NULL || ! mutex->is_valid )
+        return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
+
+    if( pthread_mutex_unlock( &mutex->mutex ) != 0 )
+        return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
+
+    return( 0 );
+}
+
+void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_init_pthread;
+void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_free_pthread;
+int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_lock_pthread;
+int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_unlock_pthread;
+
+/*
+ * With phtreads we can statically initialize mutexes
+ */
+#define MUTEX_INIT  = { PTHREAD_MUTEX_INITIALIZER, 1 }
+
+#endif /* MBEDTLS_THREADING_PTHREAD */
+
+#if defined(MBEDTLS_THREADING_ALT)
+static int threading_mutex_fail( mbedtls_threading_mutex_t *mutex )
+{
+    ((void) mutex );
+    return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
+}
+static void threading_mutex_dummy( mbedtls_threading_mutex_t *mutex )
+{
+    ((void) mutex );
+    return;
+}
+
+void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
+void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
+int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
+int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
+
+/*
+ * Set functions pointers and initialize global mutexes
+ */
+void mbedtls_threading_set_alt( void (*mutex_init)( mbedtls_threading_mutex_t * ),
+                       void (*mutex_free)( mbedtls_threading_mutex_t * ),
+                       int (*mutex_lock)( mbedtls_threading_mutex_t * ),
+                       int (*mutex_unlock)( mbedtls_threading_mutex_t * ) )
+{
+    mbedtls_mutex_init = mutex_init;
+    mbedtls_mutex_free = mutex_free;
+    mbedtls_mutex_lock = mutex_lock;
+    mbedtls_mutex_unlock = mutex_unlock;
+
+#if defined(MBEDTLS_FS_IO)
+    mbedtls_mutex_init( &mbedtls_threading_readdir_mutex );
+#endif
+}
+
+/*
+ * Free global mutexes
+ */
+void mbedtls_threading_free_alt( void )
+{
+#if defined(MBEDTLS_FS_IO)
+    mbedtls_mutex_free( &mbedtls_threading_readdir_mutex );
+#endif
+}
+#endif /* MBEDTLS_THREADING_ALT */
+
+/*
+ * Define global mutexes
+ */
+#ifndef MUTEX_INIT
+#define MUTEX_INIT
+#endif
+#if defined(MBEDTLS_FS_IO)
+mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex MUTEX_INIT;
+#endif
+
+#endif /* MBEDTLS_THREADING_C */