src/frontends/android/jni/libandroidbridge/android_jni.h

   1 /*
   2  * Copyright (C) 2012 Tobias Brunner
   3  * Copyright (C) 2012 Giuliano Grassi
   4  * Copyright (C) 2012 Ralf Sager
   5  * Hochschule fuer Technik Rapperswil
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2 of the License, or (at your
  10  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15  * for more details.
  16  */
  17
  18 /**
  19  * @defgroup android_jni android_jni
  20  * @{ @ingroup libandroidbridge
  21  */
  22
  23 #ifndef ANDROID_JNI_H_
  24 #define ANDROID_JNI_H_
  25
  26 #include <jni.h>
  27 #include <library.h>
  28
  29 #define JNI_PACKAGE org_strongswan_android_logic
  30 #define JNI_PACKAGE_STRING "org/strongswan/android/logic"
  31
  32 #define JNI_METHOD_PP(pack, klass, name, ret, ...) \
  33         ret Java_##pack##_##klass##_##name(JNIEnv *env, jobject this, ##__VA_ARGS__)
  34
  35 #define JNI_METHOD_P(pack, klass, name, ret, ...) \
  36         JNI_METHOD_PP(pack, klass, name, ret, ##__VA_ARGS__)
  37
  38 #define JNI_METHOD(klass, name, ret, ...) \
  39         JNI_METHOD_P(JNI_PACKAGE, klass, name, ret, ##__VA_ARGS__)
  40
  41 /**
  42  * Java classes
  43  * Initialized in JNI_OnLoad()
  44  */
  45 extern jclass *android_charonvpnservice_class;
  46 extern jclass *android_charonvpnservice_builder_class;
  47
  48 /**
  49  * Attach the current thread to the JVM
  50  *
  51  * As local JNI references are not freed until the thread detaches
  52  * androidjni_detach_thread() should be called as soon as possible.
  53  * If it is not called a thread-local destructor ensures that the
  54  * thread is at least detached as soon as it terminates.
  55  *
  56  * @param env           JNIEnv
  57  */
  58 void androidjni_attach_thread(JNIEnv **env);
  59
  60 /**
  61  * Detach the current thread from the JVM
  62  *
  63  * Call this as soon as possible to ensure that local JNI references are freed.
  64  */
  65 void androidjni_detach_thread();
  66
  67 /**
  68  * Handle exceptions thrown by a JNI call
  69  *
  70  * @param env           JNIEnv
  71  * @return                      TRUE if an exception was thrown
  72  */
  73 static inline bool androidjni_exception_occurred(JNIEnv *env)
  74 {
  75         if ((*env)->ExceptionOccurred(env))
  76         {       /* clear any exception, otherwise the VM is terminated */
  77                 (*env)->ExceptionDescribe(env);
  78                 (*env)->ExceptionClear(env);
  79                 return TRUE;
  80         }
  81         return FALSE;
  82 }
  83
  84 /**
  85  * Convert a Java string to a C string.  Memory is allocated.
  86  *
  87  * @param env           JNIEnv
  88  * @param jstr          Java string
  89  * @return                      native C string (allocated)
  90  */
  91 static inline char *androidjni_convert_jstring(JNIEnv *env, jstring jstr)
  92 {
  93         char *str;
  94         jsize len;
  95
  96         len = (*env)->GetStringUTFLength(env, jstr);
  97         str = malloc(len + 1);
  98         (*env)->GetStringUTFRegion(env, jstr, 0, len, str);
  99         str[len] = '\0';
 100         return str;
 101 }
 102
 103 #endif /** ANDROID_JNI_H_ @}*/