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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // This file is autogenerated by
      6 //     base/android/jni_generator/jni_generator.py
      7 // For
      8 //     org/chromium/foo/Foo
      9 
     10 #ifndef org_chromium_foo_Foo_JNI
     11 #define org_chromium_foo_Foo_JNI
     12 
     13 #include <jni.h>
     14 
     15 #include "base/android/jni_generator/jni_generator_helper.h"
     16 
     17 #include "base/android/jni_int_wrapper.h"
     18 
     19 // Step 1: forward declarations.
     20 namespace {
     21 const char kFooClassPath[] = "org/chromium/foo/Foo";
     22 // Leaking this jclass as we cannot use LazyInstance from some threads.
     23 jclass g_Foo_clazz = NULL;
     24 #define Foo_clazz(env) g_Foo_clazz
     25 
     26 }  // namespace
     27 
     28 static void DoSomething(JNIEnv* env, jclass jcaller,
     29     jobject callback);
     30 
     31 // Step 2: method stubs.
     32 
     33 static base::subtle::AtomicWord g_Foo_calledByNative = 0;
     34 static void Java_Foo_calledByNative(JNIEnv* env, jobject callback) {
     35   /* Must call RegisterNativesImpl()  */
     36   CHECK_CLAZZ(env, Foo_clazz(env),
     37       Foo_clazz(env));
     38   jmethodID method_id =
     39       base::android::MethodID::LazyGet<
     40       base::android::MethodID::TYPE_STATIC>(
     41       env, Foo_clazz(env),
     42       "calledByNative",
     43 
     44 "("
     45 "Lorg/chromium/foo/Bar$Callback;"
     46 ")"
     47 "V",
     48       &g_Foo_calledByNative);
     49 
     50      env->CallStaticVoidMethod(Foo_clazz(env),
     51           method_id, callback);
     52   jni_generator::CheckException(env);
     53 
     54 }
     55 
     56 // Step 3: RegisterNatives.
     57 
     58 static const JNINativeMethod kMethodsFoo[] = {
     59     { "nativeDoSomething",
     60 "("
     61 "Lorg/chromium/foo/Bar$Callback;"
     62 ")"
     63 "V", reinterpret_cast<void*>(DoSomething) },
     64 };
     65 
     66 static bool RegisterNativesImpl(JNIEnv* env) {
     67   g_Foo_clazz = reinterpret_cast<jclass>(env->NewGlobalRef(
     68       base::android::GetClass(env, kFooClassPath).obj()));
     69 
     70   const int kMethodsFooSize = arraysize(kMethodsFoo);
     71 
     72   if (env->RegisterNatives(Foo_clazz(env),
     73                            kMethodsFoo,
     74                            kMethodsFooSize) < 0) {
     75     jni_generator::HandleRegistrationError(
     76         env, Foo_clazz(env), __FILE__);
     77     return false;
     78   }
     79 
     80   return true;
     81 }
     82 
     83 #endif  // org_chromium_foo_Foo_JNI
     84