1 files changed, 124 insertions, 0 deletions
diff --git a/javaunohelper/source/preload.cxx b/javaunohelper/source/preload.cxx
new file mode 100644
index 000000000..d491e9b4d
--- /dev/null
+++ b/javaunohelper/source/preload.cxx
@@ -0,0 +1,124 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <jni.h>
+
+#include <rtl/ustring.hxx>
+#include <osl/module.hxx>
+
+#include "juhx-export-types.hxx"
+
+// In retrospect, the reason to create a juh wrapper around the juhx library was
+// probably because java.lang.System.loadLibrary uses RTLD_LOCAL, so uniqueness
+// of GCC RTTI symbols needed for exception handling would not be guaranteed.
+
+#if ! defined SAL_DLLPREFIX
+#define SAL_DLLPREFIX ""
+#endif
+
+
+extern "C"
+{
+
+static javaunohelper::detail::Func_writeInfo * s_writeInfo;
+static javaunohelper::detail::Func_getFactory * s_getFactory;
+static javaunohelper::detail::Func_bootstrap * s_bootstrap;
+static bool s_inited = false;
+
+extern "C" { static void thisModule() {} }
+
+
+static bool inited_juhx( JNIEnv * jni_env )
+{
+    if (s_inited)
+        return true;
+    OUString lib_name = SAL_DLLPREFIX "juhx" SAL_DLLEXTENSION;
+    osl::Module aModule;
+    if (!aModule.loadRelative(&thisModule, lib_name, SAL_LOADMODULE_LAZY | SAL_LOADMODULE_GLOBAL))
+    {
+        jclass c = jni_env->FindClass( "java/lang/RuntimeException" );
+        jni_env->ThrowNew(
+            c, "error loading " SAL_DLLPREFIX "juhx" SAL_DLLEXTENSION "!" );
+        return false;
+    }
+    else
+    {
+        OUString symbol =
+              "Java_com_sun_star_comp_helper_SharedLibraryLoader_component_1writeInfo";
+        s_writeInfo = reinterpret_cast<javaunohelper::detail::Func_writeInfo *>(aModule.getFunctionSymbol(symbol));
+        symbol =
+            "Java_com_sun_star_comp_helper_SharedLibraryLoader_component_1getFactory";
+        s_getFactory = reinterpret_cast<javaunohelper::detail::Func_getFactory *>(aModule.getFunctionSymbol(symbol));
+        symbol =
+            "Java_com_sun_star_comp_helper_Bootstrap_cppuhelper_1bootstrap";
+        s_bootstrap =
+            reinterpret_cast<javaunohelper::detail::Func_bootstrap *>(aModule.getFunctionSymbol(symbol));
+
+        if (nullptr == s_writeInfo ||
+            nullptr == s_getFactory ||
+            nullptr == s_bootstrap)
+        {
+            jclass c = jni_env->FindClass( "java/lang/RuntimeException" );
+            jni_env->ThrowNew(
+                c, "error resolving symbols of " SAL_DLLPREFIX "juhx" SAL_DLLEXTENSION "!" );
+            return false;
+        }
+        aModule.release();
+    }
+    s_inited = true;
+    return true;
+}
+
+
+SAL_DLLPUBLIC_EXPORT jboolean JNICALL
+Java_com_sun_star_comp_helper_SharedLibraryLoader_component_1writeInfo(
+    JNIEnv * pJEnv, jclass jClass, jstring jLibName, jobject jSMgr,
+    jobject jRegKey, jobject loader )
+{
+    if (inited_juhx( pJEnv ))
+        return (*s_writeInfo)(
+            pJEnv, jClass, jLibName, jSMgr, jRegKey, loader );
+    return JNI_FALSE;
+}
+
+SAL_DLLPUBLIC_EXPORT jobject JNICALL
+Java_com_sun_star_comp_helper_SharedLibraryLoader_component_1getFactory(
+    JNIEnv * pJEnv, jclass jClass, jstring jLibName, jstring jImplName,
+    jobject jSMgr, jobject jRegKey, jobject loader )
+{
+    if (inited_juhx( pJEnv ))
+        return (*s_getFactory)(
+            pJEnv, jClass, jLibName, jImplName, jSMgr, jRegKey, loader );
+    return nullptr;
+}
+
+SAL_DLLPUBLIC_EXPORT jobject JNICALL
+Java_com_sun_star_comp_helper_Bootstrap_cppuhelper_1bootstrap(
+    JNIEnv * jni_env, jclass jClass, jstring juno_rc, jobjectArray jpairs,
+    jobject loader )
+{
+    if (inited_juhx( jni_env ))
+        return (*s_bootstrap)( jni_env, jClass, juno_rc, jpairs, loader );
+    return nullptr;
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */