javaunohelper/source/preload.cxx

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  28
  29
  30 #include "jni.h"
  31
  32 #include "rtl/ustring.hxx"
  33 #include "osl/module.h"
  34
  35 // In retrospect, the reason to create a juh wrapper around the juhx library was
  36 // probably because java.lang.System.loadLibrary uses RTLD_LOCAL, so uniqueness
  37 // of GCC RTTI symbols needed for exception handling would not be guaranteed.
  38
  39 #define OUSTR(x) ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(x) )
  40
  41 #if ! defined SAL_DLLPREFIX
  42 #define SAL_DLLPREFIX ""
  43 #endif
  44
  45 using ::rtl::OUString;
  46
  47 extern "C"
  48 {
  49 typedef jboolean (JNICALL * fptr_writeInfo)(
  50     JNIEnv *, jclass, jstring, jobject, jobject, jobject );
  51 typedef jobject (JNICALL * fptr_getFactory)(
  52     JNIEnv *, jclass, jstring, jstring, jobject, jobject, jobject );
  53 typedef jobject (JNICALL * fptr_createRegistryServiceFactory)(
  54     JNIEnv *, jclass, jstring, jstring, jboolean, jobject );
  55 typedef jobject (JNICALL * fptr_bootstrap)(
  56     JNIEnv *_env, jclass, jstring, jobjectArray, jobject );
  57
  58 static fptr_writeInfo s_writeInfo;
  59 static fptr_getFactory s_getFactory;
  60 static fptr_createRegistryServiceFactory s_createRegistryServiceFactory;
  61 static fptr_bootstrap s_bootstrap;
  62 static bool s_inited = false;
  63
  64 extern "C" { static void SAL_CALL thisModule() {} }
  65
  66 //--------------------------------------------------------------------------------------------------
  67 static bool inited_juhx( JNIEnv * jni_env )
  68 {
  69     if (s_inited)
  70         return true;
  71     OUString lib_name = OUSTR(SAL_DLLPREFIX "juhx" SAL_DLLEXTENSION);
  72     oslModule hModule =
  73         osl_loadModuleRelative( &thisModule, lib_name.pData, SAL_LOADMODULE_LAZY | SAL_LOADMODULE_GLOBAL );
  74     if (0 == hModule)
  75     {
  76         jclass c = jni_env->FindClass( "java/lang/RuntimeException" );
  77         jni_env->ThrowNew(
  78             c, "error loading " SAL_DLLPREFIX "juhx" SAL_DLLEXTENSION "!" );
  79         return false;
  80     }
  81     else
  82     {
  83         OUString symbol =
  84               OUSTR("Java_com_sun_star_comp_helper_SharedLibraryLoader_component_1writeInfo");
  85         s_writeInfo = (fptr_writeInfo)osl_getFunctionSymbol(
  86             hModule, symbol.pData );
  87         symbol =
  88             OUSTR("Java_com_sun_star_comp_helper_SharedLibraryLoader_component_1getFactory");
  89         s_getFactory = (fptr_getFactory)osl_getFunctionSymbol(
  90             hModule, symbol.pData );
  91         symbol =
  92             OUSTR("Java_com_sun_star_comp_helper_RegistryServiceFactory_createRegistryServiceFactory");
  93         s_createRegistryServiceFactory =
  94             (fptr_createRegistryServiceFactory)osl_getFunctionSymbol(
  95                 hModule, symbol.pData );
  96         symbol =
  97             OUSTR("Java_com_sun_star_comp_helper_Bootstrap_cppuhelper_1bootstrap");
  98         s_bootstrap =
  99             (fptr_bootstrap)osl_getFunctionSymbol( hModule, symbol.pData );
 100
 101         if (0 == s_writeInfo ||
 102             0 == s_getFactory ||
 103             0 == s_createRegistryServiceFactory ||
 104             0 == s_bootstrap)
 105         {
 106             jclass c = jni_env->FindClass( "java/lang/RuntimeException" );
 107             jni_env->ThrowNew(
 108                 c, "error resolving symbols of " SAL_DLLPREFIX "juhx" SAL_DLLEXTENSION "!" );
 109             return false;
 110         }
 111     }
 112     s_inited = true;
 113     return true;
 114 }
 115
 116 //==================================================================================================
 117 JNIEXPORT jboolean JNICALL
 118 Java_com_sun_star_comp_helper_SharedLibraryLoader_component_1writeInfo(
 119     JNIEnv * pJEnv, jclass jClass, jstring jLibName, jobject jSMgr,
 120     jobject jRegKey, jobject loader )
 121 {
 122     if (inited_juhx( pJEnv ))
 123         return (*s_writeInfo)(
 124             pJEnv, jClass, jLibName, jSMgr, jRegKey, loader );
 125     return JNI_FALSE;
 126 }
 127 //==================================================================================================
 128 JNIEXPORT jobject JNICALL
 129 Java_com_sun_star_comp_helper_SharedLibraryLoader_component_1getFactory(
 130     JNIEnv * pJEnv, jclass jClass, jstring jLibName, jstring jImplName,
 131     jobject jSMgr, jobject jRegKey, jobject loader )
 132 {
 133     if (inited_juhx( pJEnv ))
 134         return (*s_getFactory)(
 135             pJEnv, jClass, jLibName, jImplName, jSMgr, jRegKey, loader );
 136     return 0;
 137 }
 138 //==================================================================================================
 139 JNIEXPORT jobject JNICALL
 140 Java_com_sun_star_comp_helper_RegistryServiceFactory_createRegistryServiceFactory(
 141     JNIEnv * pJEnv, jclass jClass, jstring jWriteRegFile,
 142     jstring jReadRegFile, jboolean jbReadOnly, jobject loader )
 143 {
 144     if (inited_juhx( pJEnv ))
 145     {
 146         return (*s_createRegistryServiceFactory)(
 147             pJEnv, jClass, jWriteRegFile, jReadRegFile, jbReadOnly, loader );
 148     }
 149     return 0;
 150 }
 151 //==================================================================================================
 152 JNIEXPORT jobject JNICALL
 153 Java_com_sun_star_comp_helper_Bootstrap_cppuhelper_1bootstrap(
 154     JNIEnv * jni_env, jclass jClass, jstring juno_rc, jobjectArray jpairs,
 155     jobject loader )
 156 {
 157     if (inited_juhx( jni_env ))
 158         return (*s_bootstrap)( jni_env, jClass, juno_rc, jpairs, loader );
 159     return 0;
 160 }
 161 }
 162
 163 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */