--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Plugins/OrthancCPlugin/OrthancCPlugin.h	Sat Jun 14 18:50:14 2014 +0200
@@ -0,0 +1,90 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege,
+ * Belgium
+ *
+ * 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 3 of the
+ * License, or (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * 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, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+
+#ifdef _MSC_VER
+#include "../../Resources/VisualStudio/stdint.h"
+#else
+#include <stdint.h>
+#endif
+
+
+#ifdef WIN32
+#define ORTHANC_PLUGINS_API __declspec(dllexport)
+#else
+#define ORTHANC_PLUGINS_API
+#endif
+
+
+#include <stdlib.h>
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+  typedef void (*OrthancPluginLogError) (const char* str);
+
+  typedef void (*OrthancPluginLogWarning) (const char* str);
+
+  typedef void (*OrthancPluginLogInfo) (const char* str);
+
+  typedef int32_t (*OrthancPluginService) (const char* serviceName,
+                                           const void* serviceParameters);
+
+  typedef struct OrthancPluginContext
+  {
+    const char* orthancVersion;
+    OrthancPluginService InvokeService;
+    OrthancPluginLogError LogError;
+    OrthancPluginLogWarning LogWarning;
+    OrthancPluginLogInfo LogInfo;
+
+    /* TODO REGISTER */
+
+  } OrthancPluginContext;
+
+
+  /**
+     Each plugin must define 2 functions, whose signature is:
+     - int32_t OrthancPluginInitialize(const OrthancPluginContext*);
+     - void OrthancPluginFinalize();
+
+     nm -C -D --defined-only libPluginTest.so
+   **/
+
+#ifdef  __cplusplus
+}
+#endif

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Resources/Samples/Plugins/Basic/CMakeLists.txt	Sat Jun 14 18:50:14 2014 +0200
@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 2.8)
+
+project(Basic)
+
+add_library(PluginTest SHARED Plugin.c)
+
+if (${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
+  # Linking with "pthread" is necessary, otherwise the software crashes
+  # http://sourceware.org/bugzilla/show_bug.cgi?id=10652#c17
+  target_link_libraries(PluginTest pthread dl)
+endif()

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Resources/Samples/Plugins/Basic/Plugin.c	Sat Jun 14 18:50:14 2014 +0200
@@ -0,0 +1,55 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege,
+ * Belgium
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ **/
+
+
+#include "../../../../Plugins/OrthancCPlugin/OrthancCPlugin.h"
+
+#include <string.h>
+#include <stdio.h>
+
+static const OrthancPluginContext* context = NULL;
+
+
+ORTHANC_PLUGINS_API int32_t OrthancPluginInitialize(const OrthancPluginContext* c)
+{
+  context = c;
+  context->LogWarning("Plugin is initializing");
+
+  char info[1024];
+  sprintf(info, "The version of Orthanc is '%s'", context->orthancVersion);
+
+  context->LogInfo(info);
+
+  return 0;
+}
+
+
+ORTHANC_PLUGINS_API void OrthancPluginFinalize()
+{
+  context->LogWarning("Plugin is finalizing");
+}
+
+

--- a/UnitTestsSources/PluginsTests.cpp	Sat Jun 14 16:53:28 2014 +0200
+++ b/UnitTestsSources/PluginsTests.cpp	Sat Jun 14 18:50:14 2014 +0200
@@ -33,7 +33,10 @@
 #include "PrecompiledHeadersUnitTests.h"
 #include "gtest/gtest.h"
 
+#include <glog/logging.h>
+
 #include "../Plugins/Engine/SharedLibrary.h"
+#include "../Plugins/OrthancCPlugin/OrthancCPlugin.h"
 
 using namespace Orthanc;
 
@@ -54,3 +57,74 @@
 #endif
 
 }
+
+
+
+static void LogError(const char* str)
+{
+  LOG(ERROR) << str;
+}
+
+static void LogWarning(const char* str)
+{
+  LOG(WARNING) << str;
+}
+
+static void LogInfo(const char* str)
+{
+  LOG(INFO) << str;
+}
+
+static int32_t InvokeService(const char* serviceName,
+                             const void* serviceParameters)
+{
+  return 0;
+}
+
+
+
+TEST(SharedLibrary, Development)
+{
+#if defined(_WIN32)
+#error Support your platform here
+
+#elif defined(__linux)
+  SharedLibrary l("./libPluginTest.so");
+  ASSERT_TRUE(l.HasFunction("OrthancPluginFinalize"));
+  ASSERT_TRUE(l.HasFunction("OrthancPluginInitialize"));
+
+  OrthancPluginContext context;
+  context.orthancVersion = ORTHANC_VERSION;
+  context.InvokeService = InvokeService;
+  context.LogError = LogError;
+  context.LogWarning = LogWarning;
+  context.LogInfo = LogInfo;
+
+  typedef void (*Finalize) ();
+  typedef int32_t (*Initialize) (const OrthancPluginContext*);
+
+  /**
+   * gcc would complain about "ISO C++ forbids casting between
+   * pointer-to-function and pointer-to-object" without the trick
+   * below, that is known as "the POSIX.1-2003 (Technical Corrigendum
+   * 1) workaround". See the man page of "dlsym()".
+   * http://www.trilithium.com/johan/2004/12/problem-with-dlsym/
+   * http://stackoverflow.com/a/14543811/881731
+   **/
+
+  Finalize finalize;
+  *(void **) (&finalize) = l.GetFunction("OrthancPluginFinalize");
+  assert(finalize != NULL);
+
+  Initialize initialize;
+  *(void **) (&initialize) = l.GetFunction("OrthancPluginInitialize");
+  assert(initialize != NULL);
+
+  initialize(&context);
+  finalize();
+
+#else
+#error Support your platform here
+#endif
+
+}