From c35a10483d409578aa96230ca8962cea84011b97 Mon Sep 17 00:00:00 2001
From: Willem Sparreboom <w.sparreboom@offspark.com>
Date: Mon, 28 Jan 2013 18:31:22 +0100
Subject: PolarSSL: pthread support for entropy

Added pthread support for polarssl entropy if --enable-threaded-resolver
config flag is set and pthread.h can be found.
---
 lib/polarsslthreadlock.c | 121 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100755 lib/polarsslthreadlock.c

(limited to 'lib/polarsslthreadlock.c')

diff --git a/lib/polarsslthreadlock.c b/lib/polarsslthreadlock.c
new file mode 100755
index 000000000..fc9c11f88
--- /dev/null
+++ b/lib/polarsslthreadlock.c
@@ -0,0 +1,121 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 2010, 2011, Hoi-Ho Chan, <hoiho.chan@gmail.com>
+ * Copyright (C) 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include <stdio.h>
+#include "curl_setup.h"
+
+#ifdef USE_POLARSSL
+
+#if defined(USE_THREADS_POSIX)
+#ifdef HAVE_PTHREAD_H
+#include <pthread.h>
+#define MUTEX_TYPE       pthread_mutex_t
+#endif /* HAVE_PTHREAD_H */
+#endif /* USE_THREADS_POSIX */
+
+#include "polarsslthreadlock.h"
+
+/* number of thread locks */
+#define NUMT                    2
+
+/* This array will store all of the mutexes available to PolarSSL. */
+static MUTEX_TYPE *mutex_buf = NULL;
+
+int polarsslthreadlock_thread_setup(void)
+{
+  int i;
+  int ret;
+
+  mutex_buf = malloc(NUMT * sizeof(MUTEX_TYPE));
+  if (!mutex_buf)
+    return 0;     /* error, no number of threads defined */
+
+#ifdef HAVE_PTHREAD_H
+  for (i = 0;  i < NUMT;  i++)
+  {
+    ret = pthread_mutex_init(&mutex_buf[i], NULL);
+	if(ret)
+	   return 0; /* pthread_mutex_init failed */
+  }
+#endif /* HAVE_PTHREAD_H */
+
+  return 1; /* OK */
+}
+
+int polarsslthreadlock_thread_cleanup(void)
+{
+  int i;
+  int ret;
+  
+  if (!mutex_buf)
+    return 0; /* error, no threads locks defined */
+
+#ifdef HAVE_PTHREAD_H
+  for (i = 0; i < NUMT; i++)
+  {
+    ret = pthread_mutex_destroy(&mutex_buf[i]);
+	if(ret)
+	   return 0; /* pthread_mutex_destroy failed */
+  } 
+#endif /* HAVE_PTHREAD_H */
+  free(mutex_buf);
+  mutex_buf = NULL;
+
+  return 1; /* OK */
+}
+
+int polarsslthreadlock_lock_function(int n)
+{
+  int ret;
+#ifdef HAVE_PTHREAD_H
+  if(n < NUMT)
+  {
+    ret = pthread_mutex_lock(&mutex_buf[n]);
+	if(ret)
+	{
+	  DEBUGF(fprintf(stderr, "Error: pthread_mutex_lock failed\n"));
+	  return 0; /* pthread_mutex_lock failed */
+	}
+  } 
+#endif /* HAVE_PTHREAD_H */
+  return 1; /* OK */
+}
+
+int polarsslthreadlock_unlock_function(int n)
+{
+  int ret;
+#ifdef HAVE_PTHREAD_H
+  if(n < NUMT)
+  {
+    ret = pthread_mutex_unlock(&mutex_buf[n]);
+	if(ret)
+	{
+	  DEBUGF(fprintf(stderr, "Error: pthread_mutex_unlock failed\n"));
+	  return 0; /* pthread_mutex_unlock failed */
+	}
+  }
+#endif /* HAVE_PTHREAD_H */
+  return 1; /* OK */
+}
+
+#endif /* USE_POLARSSL */
-- 
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