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| 1 /* | |
| 2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #include "webrtc/modules/audio_device/android/helpers_android.h" | |
| 12 | |
| 13 #include <android/log.h> | |
| 14 #include <assert.h> | |
| 15 #include <pthread.h> | |
| 16 #include <stddef.h> | |
| 17 #include <unistd.h> | |
| 18 | |
| 19 #define TAG "HelpersAndroid" | |
| 20 #define ALOGD(...) __android_log_print(ANDROID_LOG_DEBUG, TAG, __VA_ARGS__) | |
| 21 | |
| 22 namespace webrtc { | |
| 23 | |
| 24 JNIEnv* GetEnv(JavaVM* jvm) { | |
| 25 void* env = NULL; | |
| 26 jint status = jvm->GetEnv(&env, JNI_VERSION_1_6); | |
| 27 RTC_CHECK(((env != NULL) && (status == JNI_OK)) || | |
| 28 ((env == NULL) && (status == JNI_EDETACHED))) | |
| 29 << "Unexpected GetEnv return: " << status << ":" << env; | |
| 30 return reinterpret_cast<JNIEnv*>(env); | |
| 31 } | |
| 32 | |
| 33 // Return a |jlong| that will correctly convert back to |ptr|. This is needed | |
| 34 // because the alternative (of silently passing a 32-bit pointer to a vararg | |
| 35 // function expecting a 64-bit param) picks up garbage in the high 32 bits. | |
| 36 jlong PointerTojlong(void* ptr) { | |
| 37 static_assert(sizeof(intptr_t) <= sizeof(jlong), | |
| 38 "Time to rethink the use of jlongs"); | |
| 39 // Going through intptr_t to be obvious about the definedness of the | |
| 40 // conversion from pointer to integral type. intptr_t to jlong is a standard | |
| 41 // widening by the static_assert above. | |
| 42 jlong ret = reinterpret_cast<intptr_t>(ptr); | |
| 43 RTC_DCHECK(reinterpret_cast<void*>(ret) == ptr); | |
| 44 return ret; | |
| 45 } | |
| 46 | |
| 47 jmethodID GetMethodID( | |
| 48 JNIEnv* jni, jclass c, const char* name, const char* signature) { | |
| 49 jmethodID m = jni->GetMethodID(c, name, signature); | |
| 50 CHECK_EXCEPTION(jni) << "Error during GetMethodID: " << name << ", " | |
| 51 << signature; | |
| 52 RTC_CHECK(m) << name << ", " << signature; | |
| 53 return m; | |
| 54 } | |
| 55 | |
| 56 jmethodID GetStaticMethodID( | |
| 57 JNIEnv* jni, jclass c, const char* name, const char* signature) { | |
| 58 jmethodID m = jni->GetStaticMethodID(c, name, signature); | |
| 59 CHECK_EXCEPTION(jni) << "Error during GetStaticMethodID: " << name << ", " | |
| 60 << signature; | |
| 61 RTC_CHECK(m) << name << ", " << signature; | |
| 62 return m; | |
| 63 } | |
| 64 | |
| 65 jclass FindClass(JNIEnv* jni, const char* name) { | |
| 66 jclass c = jni->FindClass(name); | |
| 67 CHECK_EXCEPTION(jni) << "Error during FindClass: " << name; | |
| 68 RTC_CHECK(c) << name; | |
| 69 return c; | |
| 70 } | |
| 71 | |
| 72 jobject NewGlobalRef(JNIEnv* jni, jobject o) { | |
| 73 jobject ret = jni->NewGlobalRef(o); | |
| 74 CHECK_EXCEPTION(jni) << "Error during NewGlobalRef"; | |
| 75 RTC_CHECK(ret); | |
| 76 return ret; | |
| 77 } | |
| 78 | |
| 79 void DeleteGlobalRef(JNIEnv* jni, jobject o) { | |
| 80 jni->DeleteGlobalRef(o); | |
| 81 CHECK_EXCEPTION(jni) << "Error during DeleteGlobalRef"; | |
| 82 } | |
| 83 | |
| 84 std::string GetThreadId() { | |
| 85 char buf[21]; // Big enough to hold a kuint64max plus terminating NULL. | |
| 86 int thread_id = gettid(); | |
| 87 RTC_CHECK_LT(snprintf(buf, sizeof(buf), "%i", thread_id), | |
| 88 static_cast<int>(sizeof(buf))) | |
| 89 << "Thread id is bigger than uint64??"; | |
| 90 return std::string(buf); | |
| 91 } | |
| 92 | |
| 93 std::string GetThreadInfo() { | |
| 94 return "@[tid=" + GetThreadId() + "]"; | |
| 95 } | |
| 96 | |
| 97 AttachThreadScoped::AttachThreadScoped(JavaVM* jvm) | |
| 98 : attached_(false), jvm_(jvm), env_(NULL) { | |
| 99 env_ = GetEnv(jvm); | |
| 100 if (!env_) { | |
| 101 // Adding debug log here so we can track down potential leaks and figure | |
| 102 // out why we sometimes see "Native thread exiting without having called | |
| 103 // DetachCurrentThread" in logcat outputs. | |
| 104 ALOGD("Attaching thread to JVM%s", GetThreadInfo().c_str()); | |
| 105 jint res = jvm->AttachCurrentThread(&env_, NULL); | |
| 106 attached_ = (res == JNI_OK); | |
| 107 RTC_CHECK(attached_) << "AttachCurrentThread failed: " << res; | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 AttachThreadScoped::~AttachThreadScoped() { | |
| 112 if (attached_) { | |
| 113 ALOGD("Detaching thread from JVM%s", GetThreadInfo().c_str()); | |
| 114 jint res = jvm_->DetachCurrentThread(); | |
| 115 RTC_CHECK(res == JNI_OK) << "DetachCurrentThread failed: " << res; | |
| 116 RTC_CHECK(!GetEnv(jvm_)); | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 JNIEnv* AttachThreadScoped::env() { return env_; } | |
| 121 | |
| 122 } // namespace webrtc | |
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