diff options
Diffstat (limited to 'third_party/libwebrtc/modules/utility/source/helpers_android.cc')
-rw-r--r-- | third_party/libwebrtc/modules/utility/source/helpers_android.cc | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/utility/source/helpers_android.cc b/third_party/libwebrtc/modules/utility/source/helpers_android.cc new file mode 100644 index 0000000000..9cfee8a2af --- /dev/null +++ b/third_party/libwebrtc/modules/utility/source/helpers_android.cc @@ -0,0 +1,117 @@ +/* + * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include "modules/utility/include/helpers_android.h" + +#include <android/log.h> +#include <pthread.h> +#include <stddef.h> +#include <unistd.h> + +#include "rtc_base/checks.h" +#include "rtc_base/platform_thread.h" + +#define TAG "HelpersAndroid" +#define ALOGD(...) __android_log_print(ANDROID_LOG_DEBUG, TAG, __VA_ARGS__) + +namespace webrtc { + +JNIEnv* GetEnv(JavaVM* jvm) { + void* env = NULL; + jint status = jvm->GetEnv(&env, JNI_VERSION_1_6); + RTC_CHECK(((env != NULL) && (status == JNI_OK)) || + ((env == NULL) && (status == JNI_EDETACHED))) + << "Unexpected GetEnv return: " << status << ":" << env; + return reinterpret_cast<JNIEnv*>(env); +} + +// Return a `jlong` that will correctly convert back to `ptr`. This is needed +// because the alternative (of silently passing a 32-bit pointer to a vararg +// function expecting a 64-bit param) picks up garbage in the high 32 bits. +jlong PointerTojlong(void* ptr) { + static_assert(sizeof(intptr_t) <= sizeof(jlong), + "Time to rethink the use of jlongs"); + // Going through intptr_t to be obvious about the definedness of the + // conversion from pointer to integral type. intptr_t to jlong is a standard + // widening by the static_assert above. + jlong ret = reinterpret_cast<intptr_t>(ptr); + RTC_DCHECK(reinterpret_cast<void*>(ret) == ptr); + return ret; +} + +jmethodID GetMethodID(JNIEnv* jni, + jclass c, + const char* name, + const char* signature) { + jmethodID m = jni->GetMethodID(c, name, signature); + CHECK_EXCEPTION(jni) << "Error during GetMethodID: " << name << ", " + << signature; + RTC_CHECK(m) << name << ", " << signature; + return m; +} + +jmethodID GetStaticMethodID(JNIEnv* jni, + jclass c, + const char* name, + const char* signature) { + jmethodID m = jni->GetStaticMethodID(c, name, signature); + CHECK_EXCEPTION(jni) << "Error during GetStaticMethodID: " << name << ", " + << signature; + RTC_CHECK(m) << name << ", " << signature; + return m; +} + +jclass FindClass(JNIEnv* jni, const char* name) { + jclass c = jni->FindClass(name); + CHECK_EXCEPTION(jni) << "Error during FindClass: " << name; + RTC_CHECK(c) << name; + return c; +} + +jobject NewGlobalRef(JNIEnv* jni, jobject o) { + jobject ret = jni->NewGlobalRef(o); + CHECK_EXCEPTION(jni) << "Error during NewGlobalRef"; + RTC_CHECK(ret); + return ret; +} + +void DeleteGlobalRef(JNIEnv* jni, jobject o) { + jni->DeleteGlobalRef(o); + CHECK_EXCEPTION(jni) << "Error during DeleteGlobalRef"; +} + +AttachThreadScoped::AttachThreadScoped(JavaVM* jvm) + : attached_(false), jvm_(jvm), env_(NULL) { + env_ = GetEnv(jvm); + if (!env_) { + // Adding debug log here so we can track down potential leaks and figure + // out why we sometimes see "Native thread exiting without having called + // DetachCurrentThread" in logcat outputs. + ALOGD("Attaching thread to JVM[tid=%d]", rtc::CurrentThreadId()); + jint res = jvm->AttachCurrentThread(&env_, NULL); + attached_ = (res == JNI_OK); + RTC_CHECK(attached_) << "AttachCurrentThread failed: " << res; + } +} + +AttachThreadScoped::~AttachThreadScoped() { + if (attached_) { + ALOGD("Detaching thread from JVM[tid=%d]", rtc::CurrentThreadId()); + jint res = jvm_->DetachCurrentThread(); + RTC_CHECK(res == JNI_OK) << "DetachCurrentThread failed: " << res; + RTC_CHECK(!GetEnv(jvm_)); + } +} + +JNIEnv* AttachThreadScoped::env() { + return env_; +} + +} // namespace webrtc |