Merged gsoc-ssh branch. Closes #910

libssh2/src/global.c

@@ -0,0 +1,78 @@
+/* Copyright (c) 2010 Lars Nordin <Lars.Nordin@SDlabs.se>
+ * Copyright (C) 2010 Simon Josefsson <simon@josefsson.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms,
+ * with or without modification, are permitted provided
+ * that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above
+ *   copyright notice, this list of conditions and the
+ *   following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials
+ *   provided with the distribution.
+ *
+ *   Neither the name of the copyright holder nor the names
+ *   of any other contributors may be used to endorse or
+ *   promote products derived from this software without
+ *   specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ */
+
+#include "libssh2_priv.h"
+
+static int _libssh2_initialized = 0;
+static int _libssh2_init_flags = 0;
+
+LIBSSH2_API int
+libssh2_init(int flags)
+{
+    if (_libssh2_initialized == 0 && !(flags & LIBSSH2_INIT_NO_CRYPTO)) {
+        libssh2_crypto_init();
+        _libssh2_init_aes_ctr();
+    }
+
+    _libssh2_initialized++;
+    _libssh2_init_flags |= flags;
+
+    return 0;
+}
+
+LIBSSH2_API void
+libssh2_exit(void)
+{
+    if (_libssh2_initialized == 0)
+        return;
+
+    _libssh2_initialized--;
+
+    if (!(_libssh2_init_flags & LIBSSH2_INIT_NO_CRYPTO)) {
+        libssh2_crypto_exit();
+    }
+
+    return;
+}
+
+void
+_libssh2_init_if_needed(void)
+{
+    if (_libssh2_initialized == 0)
+        (void)libssh2_init (0);
+}