119 lines
3.9 KiB
C++
119 lines
3.9 KiB
C++
/*
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* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/utility/include/helpers_android.h"
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#include <android/log.h>
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#include <assert.h>
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#include <pthread.h>
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#include <stddef.h>
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#include <unistd.h>
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#include "rtc_base/checks.h"
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#include "rtc_base/platform_thread.h"
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#define TAG "HelpersAndroid"
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#define ALOGD(...) __android_log_print(ANDROID_LOG_DEBUG, TAG, __VA_ARGS__)
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namespace webrtc {
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JNIEnv* GetEnv(JavaVM* jvm) {
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void* env = NULL;
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jint status = jvm->GetEnv(&env, JNI_VERSION_1_6);
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RTC_CHECK(((env != NULL) && (status == JNI_OK)) ||
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((env == NULL) && (status == JNI_EDETACHED)))
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<< "Unexpected GetEnv return: " << status << ":" << env;
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return reinterpret_cast<JNIEnv*>(env);
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}
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// Return a |jlong| that will correctly convert back to |ptr|. This is needed
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// because the alternative (of silently passing a 32-bit pointer to a vararg
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// function expecting a 64-bit param) picks up garbage in the high 32 bits.
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jlong PointerTojlong(void* ptr) {
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static_assert(sizeof(intptr_t) <= sizeof(jlong),
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"Time to rethink the use of jlongs");
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// Going through intptr_t to be obvious about the definedness of the
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// conversion from pointer to integral type. intptr_t to jlong is a standard
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// widening by the static_assert above.
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jlong ret = reinterpret_cast<intptr_t>(ptr);
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RTC_DCHECK(reinterpret_cast<void*>(ret) == ptr);
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return ret;
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}
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jmethodID GetMethodID(JNIEnv* jni,
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jclass c,
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const char* name,
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const char* signature) {
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jmethodID m = jni->GetMethodID(c, name, signature);
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CHECK_EXCEPTION(jni) << "Error during GetMethodID: " << name << ", "
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<< signature;
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RTC_CHECK(m) << name << ", " << signature;
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return m;
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}
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jmethodID GetStaticMethodID(JNIEnv* jni,
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jclass c,
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const char* name,
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const char* signature) {
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jmethodID m = jni->GetStaticMethodID(c, name, signature);
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CHECK_EXCEPTION(jni) << "Error during GetStaticMethodID: " << name << ", "
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<< signature;
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RTC_CHECK(m) << name << ", " << signature;
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return m;
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}
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jclass FindClass(JNIEnv* jni, const char* name) {
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jclass c = jni->FindClass(name);
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CHECK_EXCEPTION(jni) << "Error during FindClass: " << name;
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RTC_CHECK(c) << name;
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return c;
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}
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jobject NewGlobalRef(JNIEnv* jni, jobject o) {
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jobject ret = jni->NewGlobalRef(o);
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CHECK_EXCEPTION(jni) << "Error during NewGlobalRef";
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RTC_CHECK(ret);
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return ret;
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}
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void DeleteGlobalRef(JNIEnv* jni, jobject o) {
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jni->DeleteGlobalRef(o);
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CHECK_EXCEPTION(jni) << "Error during DeleteGlobalRef";
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}
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AttachThreadScoped::AttachThreadScoped(JavaVM* jvm)
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: attached_(false), jvm_(jvm), env_(NULL) {
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env_ = GetEnv(jvm);
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if (!env_) {
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// Adding debug log here so we can track down potential leaks and figure
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// out why we sometimes see "Native thread exiting without having called
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// DetachCurrentThread" in logcat outputs.
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ALOGD("Attaching thread to JVM[tid=%d]", rtc::CurrentThreadId());
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jint res = jvm->AttachCurrentThread(&env_, NULL);
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attached_ = (res == JNI_OK);
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RTC_CHECK(attached_) << "AttachCurrentThread failed: " << res;
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}
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}
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AttachThreadScoped::~AttachThreadScoped() {
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if (attached_) {
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ALOGD("Detaching thread from JVM[tid=%d]", rtc::CurrentThreadId());
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jint res = jvm_->DetachCurrentThread();
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RTC_CHECK(res == JNI_OK) << "DetachCurrentThread failed: " << res;
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RTC_CHECK(!GetEnv(jvm_));
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}
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}
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JNIEnv* AttachThreadScoped::env() {
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return env_;
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}
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} // namespace webrtc
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