gecko/widget/android/AndroidJNIWrapper.cpp
Jim Chen 8cf891bd76 Bug 959237 - Define GetVM, GetJNIEnv, and GetJNIForThread as infallible; r=blassey
Currently when either of these methods fail, we log something and rely on the calling code to null check. Since these failures are serious and likely unrecoverable, it's better to define these methods as infallible and just crash if they do fail.
2014-01-17 23:32:24 -06:00

125 lines
3.7 KiB
C++

/* -*- Mode: c++; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <android/log.h>
#include <dlfcn.h>
#include <prthread.h>
#include "mozilla/DebugOnly.h"
#include "mozilla/Assertions.h"
#include "nsThreadUtils.h"
#include "AndroidBridge.h"
extern "C" {
jclass __jsjni_GetGlobalClassRef(const char *className);
}
class GetGlobalClassRefRunnable : public nsRunnable {
public:
GetGlobalClassRefRunnable(const char *className, jclass *foundClass) :
mClassName(className), mResult(foundClass) {}
NS_IMETHOD Run() {
*mResult = __jsjni_GetGlobalClassRef(mClassName);
return NS_OK;
}
private:
const char *mClassName;
jclass *mResult;
};
extern "C" {
__attribute__ ((visibility("default")))
jclass
jsjni_FindClass(const char *className) {
// FindClass outside the main thread will run into problems due
// to missing the classpath
MOZ_ASSERT(NS_IsMainThread());
JNIEnv *env = mozilla::AndroidBridge::GetJNIEnv();
return env->FindClass(className);
}
jclass
__jsjni_GetGlobalClassRef(const char *className) {
// root class globally
JNIEnv *env = mozilla::AndroidBridge::GetJNIEnv();
jclass globalRef = static_cast<jclass>(env->NewGlobalRef(env->FindClass(className)));
if (!globalRef)
return nullptr;
// return the newly create global reference
return globalRef;
}
__attribute__ ((visibility("default")))
jclass
jsjni_GetGlobalClassRef(const char *className) {
nsCOMPtr<nsIThread> mainThread;
mozilla::DebugOnly<nsresult> rv = NS_GetMainThread(getter_AddRefs(mainThread));
MOZ_ASSERT(NS_SUCCEEDED(rv));
jclass foundClass;
nsRefPtr<nsIRunnable> runnable_ref(new GetGlobalClassRefRunnable(className,
&foundClass));
mainThread->Dispatch(runnable_ref, NS_DISPATCH_SYNC);
if (!foundClass)
return nullptr;
return foundClass;
}
__attribute__ ((visibility("default")))
jmethodID
jsjni_GetStaticMethodID(jclass methodClass,
const char *methodName,
const char *signature) {
JNIEnv *env = mozilla::AndroidBridge::GetJNIEnv();
return env->GetStaticMethodID(methodClass, methodName, signature);
}
__attribute__ ((visibility("default")))
bool
jsjni_ExceptionCheck() {
JNIEnv *env = mozilla::AndroidBridge::GetJNIEnv();
return env->ExceptionCheck();
}
__attribute__ ((visibility("default")))
void
jsjni_CallStaticVoidMethodA(jclass cls,
jmethodID method,
jvalue *values) {
JNIEnv *env = mozilla::AndroidBridge::GetJNIEnv();
mozilla::AutoLocalJNIFrame jniFrame(env);
env->CallStaticVoidMethodA(cls, method, values);
}
__attribute__ ((visibility("default")))
int
jsjni_CallStaticIntMethodA(jclass cls,
jmethodID method,
jvalue *values) {
JNIEnv *env = mozilla::AndroidBridge::GetJNIEnv();
mozilla::AutoLocalJNIFrame jniFrame(env);
return env->CallStaticIntMethodA(cls, method, values);
}
__attribute__ ((visibility("default")))
jobject jsjni_GetGlobalContextRef() {
return mozilla::AndroidBridge::Bridge()->GetGlobalContextRef();
}
__attribute__ ((visibility("default")))
JavaVM* jsjni_GetVM() {
return mozilla::AndroidBridge::GetVM();
}
__attribute__ ((visibility("default")))
JNIEnv* jsjni_GetJNIForThread() {
return GetJNIForThread();
}
}