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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/android/jni_android.h"
#include "base/logging.h"
namespace {
JavaVM* g_jvm = 0;
jobject g_application_context = NULL;
}
namespace base {
namespace android {
JNIEnv* AttachCurrentThread() {
if (!g_jvm)
return NULL;
JNIEnv* env = NULL;
jint ret = g_jvm->AttachCurrentThread(&env, NULL);
DCHECK_EQ(ret, JNI_OK);
return env;
}
void DetachFromVM() {
// Ignore the return value, if the thread is not attached, DetachCurrentThread
// will fail. But it is ok as the native thread may never be attached.
if (g_jvm)
g_jvm->DetachCurrentThread();
}
void InitVM(JavaVM* vm) {
DCHECK(!g_jvm);
g_jvm = vm;
}
void InitApplicationContext(jobject context) {
DCHECK(!g_application_context);
g_application_context = context;
}
jobject GetApplicationContext() {
DCHECK(g_application_context);
return g_application_context;
}
jmethodID GetMethodID(JNIEnv* env,
jclass clazz,
const char* const method,
const char* const jni_signature) {
jmethodID id = env->GetMethodID(clazz, method, jni_signature);
DCHECK(id) << method;
CheckException(env);
return id;
}
bool CheckException(JNIEnv* env) {
if (env->ExceptionCheck() == JNI_FALSE)
return false;
env->ExceptionDescribe();
env->ExceptionClear();
return true;
}
} // namespace android
} // namespace base
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