864d304156
Reflects refactoring of JNI helper code that depends on private methods within libnativehelper. Bug: 151443957 Test: Treehugger Change-Id: I7af128f42ae89a77a8e3fb113ea533331153c535 Merged-In: I7af128f42ae89a77a8e3fb113ea533331153c535 Exempt-From-Owner-Approval: cherry pick (cherry picked from commit 329c612e3d5ae440bf13e1f5fc9a4012263524e9)
107 lines
4.1 KiB
C++
107 lines
4.1 KiB
C++
/*
|
|
* Copyright (C) 2014 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef GRAPHICS_JNI_HELPERS
|
|
#define GRAPHICS_JNI_HELPERS
|
|
|
|
#include <log/log.h>
|
|
#include <nativehelper/JNIPlatformHelp.h>
|
|
#include <nativehelper/scoped_local_ref.h>
|
|
#include <nativehelper/scoped_utf_chars.h>
|
|
#include <string>
|
|
|
|
// Host targets (layoutlib) do not differentiate between regular and critical native methods,
|
|
// and they need all the JNI methods to have JNIEnv* and jclass/jobject as their first two arguments.
|
|
// The following macro allows to have those arguments when compiling for host while omitting them when
|
|
// compiling for Android.
|
|
#ifdef __ANDROID__
|
|
#define CRITICAL_JNI_PARAMS
|
|
#define CRITICAL_JNI_PARAMS_COMMA
|
|
#else
|
|
#define CRITICAL_JNI_PARAMS JNIEnv*, jclass
|
|
#define CRITICAL_JNI_PARAMS_COMMA JNIEnv*, jclass,
|
|
#endif
|
|
|
|
namespace android {
|
|
|
|
// Defines some helpful functions.
|
|
|
|
static inline jclass FindClassOrDie(JNIEnv* env, const char* class_name) {
|
|
jclass clazz = env->FindClass(class_name);
|
|
LOG_ALWAYS_FATAL_IF(clazz == NULL, "Unable to find class %s", class_name);
|
|
return clazz;
|
|
}
|
|
|
|
static inline jfieldID GetFieldIDOrDie(JNIEnv* env, jclass clazz, const char* field_name,
|
|
const char* field_signature) {
|
|
jfieldID res = env->GetFieldID(clazz, field_name, field_signature);
|
|
LOG_ALWAYS_FATAL_IF(res == NULL, "Unable to find static field %s", field_name);
|
|
return res;
|
|
}
|
|
|
|
static inline jmethodID GetMethodIDOrDie(JNIEnv* env, jclass clazz, const char* method_name,
|
|
const char* method_signature) {
|
|
jmethodID res = env->GetMethodID(clazz, method_name, method_signature);
|
|
LOG_ALWAYS_FATAL_IF(res == NULL, "Unable to find method %s", method_name);
|
|
return res;
|
|
}
|
|
|
|
static inline jfieldID GetStaticFieldIDOrDie(JNIEnv* env, jclass clazz, const char* field_name,
|
|
const char* field_signature) {
|
|
jfieldID res = env->GetStaticFieldID(clazz, field_name, field_signature);
|
|
LOG_ALWAYS_FATAL_IF(res == NULL, "Unable to find static field %s", field_name);
|
|
return res;
|
|
}
|
|
|
|
static inline jmethodID GetStaticMethodIDOrDie(JNIEnv* env, jclass clazz, const char* method_name,
|
|
const char* method_signature) {
|
|
jmethodID res = env->GetStaticMethodID(clazz, method_name, method_signature);
|
|
LOG_ALWAYS_FATAL_IF(res == NULL, "Unable to find static method %s", method_name);
|
|
return res;
|
|
}
|
|
|
|
template <typename T>
|
|
static inline T MakeGlobalRefOrDie(JNIEnv* env, T in) {
|
|
jobject res = env->NewGlobalRef(in);
|
|
LOG_ALWAYS_FATAL_IF(res == NULL, "Unable to create global reference.");
|
|
return static_cast<T>(res);
|
|
}
|
|
|
|
static inline int RegisterMethodsOrDie(JNIEnv* env, const char* className,
|
|
const JNINativeMethod* gMethods, int numMethods) {
|
|
int res = jniRegisterNativeMethods(env, className, gMethods, numMethods);
|
|
LOG_ALWAYS_FATAL_IF(res < 0, "Unable to register native methods.");
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* Read the specified field from jobject, and convert to std::string.
|
|
* If the field cannot be obtained, return defaultValue.
|
|
*/
|
|
static inline std::string getStringField(JNIEnv* env, jobject obj, jfieldID fieldId,
|
|
const char* defaultValue) {
|
|
ScopedLocalRef<jstring> strObj(env, jstring(env->GetObjectField(obj, fieldId)));
|
|
if (strObj != nullptr) {
|
|
ScopedUtfChars chars(env, strObj.get());
|
|
return std::string(chars.c_str());
|
|
}
|
|
return std::string(defaultValue);
|
|
}
|
|
|
|
} // namespace android
|
|
|
|
#endif // GRAPHICS_JNI_HELPERS
|