jurt/source/pipe/wrapper/wrapper.c

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <sal/config.h>
  21
  22 #include <stddef.h>
  23 #include <stdlib.h>
  24
  25 #define WIN32_LEAN_AND_MEAN
  26 #include <windows.h>
  27
  28 #include <jni.h>
  29 #include <sal/types.h>
  30
  31
  32 static HMODULE   module   = NULL;
  33 static HINSTANCE hInstDLL = NULL;
  34 static CRITICAL_SECTION CriticalSection;
  35
  36 static void InitWrapper(void) {
  37     #define MAXPATH 512
  38     wchar_t path[MAXPATH];
  39     DWORD size;
  40
  41     size = GetModuleFileNameW(hInstDLL, path, MAXPATH);
  42     if (size == 0) {
  43         abort();
  44     }
  45     path[size - 5] = L'x'; /* ...\jpipe.dll -> ...\jpipx.dll */
  46     module = LoadLibraryExW(path, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
  47     if (module == NULL) {
  48         abort();
  49     }
  50 }
  51
  52 static FARPROC getFunction(char const * name)
  53 {
  54     {
  55         EnterCriticalSection(&CriticalSection);
  56
  57         if(module == NULL)
  58             InitWrapper();
  59
  60         LeaveCriticalSection(&CriticalSection);
  61     }
  62
  63     return GetProcAddress(module, name);
  64 }
  65
  66 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) {
  67     (void) lpvReserved;
  68
  69     if (fdwReason == DLL_PROCESS_ATTACH)
  70     {
  71         InitializeCriticalSection(&CriticalSection);
  72         hInstDLL = hinstDLL;
  73     }
  74
  75     return TRUE;
  76 }
  77
  78 SAL_DLLPUBLIC_EXPORT void JNICALL
  79 Java_com_sun_star_lib_connections_pipe_PipeConnection_createJNI(
  80     JNIEnv * env, jobject obj_this, jstring name)
  81 {
  82     (*(void (*)(JNIEnv *, jobject, jstring))
  83      getFunction("PipeConnection_create"))(env, obj_this, name);
  84 }
  85
  86 SAL_DLLPUBLIC_EXPORT void JNICALL
  87 Java_com_sun_star_lib_connections_pipe_PipeConnection_closeJNI(
  88     JNIEnv * env, jobject obj_this)
  89 {
  90     (*(void (*)(JNIEnv *, jobject))
  91      getFunction("PipeConnection_close"))(env, obj_this);
  92 }
  93
  94 SAL_DLLPUBLIC_EXPORT jint JNICALL
  95 Java_com_sun_star_lib_connections_pipe_PipeConnection_readJNI(
  96     JNIEnv * env, jobject obj_this, jobjectArray buffer, jint len)
  97 {
  98     return (*(jint (*)(JNIEnv *, jobject, jobjectArray, jint))
  99             getFunction("PipeConnection_read"))(env, obj_this, buffer, len);
 100 }
 101
 102 SAL_DLLPUBLIC_EXPORT void JNICALL
 103 Java_com_sun_star_lib_connections_pipe_PipeConnection_writeJNI(
 104     JNIEnv * env, jobject obj_this, jbyteArray buffer)
 105 {
 106     (*(void (*)(JNIEnv *, jobject, jbyteArray))
 107      getFunction("PipeConnection_write"))(env, obj_this, buffer);
 108 }
 109
 110 SAL_DLLPUBLIC_EXPORT void JNICALL
 111 Java_com_sun_star_lib_connections_pipe_PipeConnection_flushJNI(
 112     JNIEnv * env, jobject obj_this)
 113 {
 114     (*(void (*)(JNIEnv *, jobject))
 115      getFunction("PipeConnection_flush"))(env, obj_this);
 116 }
 117
 118 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */