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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/base/checks.h" |
| 12 #include "webrtc/modules/utility/include/helpers_android.h" |
| 13 |
| 14 #include <android/log.h> |
| 15 #include <assert.h> |
| 16 #include <pthread.h> |
| 17 #include <stddef.h> |
| 18 #include <unistd.h> |
| 19 |
| 20 #define TAG "HelpersAndroid" |
| 21 #define ALOGD(...) __android_log_print(ANDROID_LOG_DEBUG, TAG, __VA_ARGS__) |
| 22 |
| 23 namespace webrtc { |
| 24 |
| 25 JNIEnv* GetEnv(JavaVM* jvm) { |
| 26 void* env = NULL; |
| 27 jint status = jvm->GetEnv(&env, JNI_VERSION_1_6); |
| 28 RTC_CHECK(((env != NULL) && (status == JNI_OK)) || |
| 29 ((env == NULL) && (status == JNI_EDETACHED))) |
| 30 << "Unexpected GetEnv return: " << status << ":" << env; |
| 31 return reinterpret_cast<JNIEnv*>(env); |
| 32 } |
| 33 |
| 34 // Return a |jlong| that will correctly convert back to |ptr|. This is needed |
| 35 // because the alternative (of silently passing a 32-bit pointer to a vararg |
| 36 // function expecting a 64-bit param) picks up garbage in the high 32 bits. |
| 37 jlong PointerTojlong(void* ptr) { |
| 38 static_assert(sizeof(intptr_t) <= sizeof(jlong), |
| 39 "Time to rethink the use of jlongs"); |
| 40 // Going through intptr_t to be obvious about the definedness of the |
| 41 // conversion from pointer to integral type. intptr_t to jlong is a standard |
| 42 // widening by the static_assert above. |
| 43 jlong ret = reinterpret_cast<intptr_t>(ptr); |
| 44 RTC_DCHECK(reinterpret_cast<void*>(ret) == ptr); |
| 45 return ret; |
| 46 } |
| 47 |
| 48 jmethodID GetMethodID ( |
| 49 JNIEnv* jni, jclass c, const char* name, const char* signature) { |
| 50 jmethodID m = jni->GetMethodID(c, name, signature); |
| 51 CHECK_EXCEPTION(jni) << "Error during GetMethodID: " << name << ", " |
| 52 << signature; |
| 53 RTC_CHECK(m) << name << ", " << signature; |
| 54 return m; |
| 55 } |
| 56 |
| 57 jmethodID GetStaticMethodID ( |
| 58 JNIEnv* jni, jclass c, const char* name, const char* signature) { |
| 59 jmethodID m = jni->GetStaticMethodID(c, name, signature); |
| 60 CHECK_EXCEPTION(jni) << "Error during GetStaticMethodID: " << name << ", " |
| 61 << signature; |
| 62 RTC_CHECK(m) << name << ", " << signature; |
| 63 return m; |
| 64 } |
| 65 |
| 66 jclass FindClass(JNIEnv* jni, const char* name) { |
| 67 jclass c = jni->FindClass(name); |
| 68 CHECK_EXCEPTION(jni) << "Error during FindClass: " << name; |
| 69 RTC_CHECK(c) << name; |
| 70 return c; |
| 71 } |
| 72 |
| 73 jobject NewGlobalRef(JNIEnv* jni, jobject o) { |
| 74 jobject ret = jni->NewGlobalRef(o); |
| 75 CHECK_EXCEPTION(jni) << "Error during NewGlobalRef"; |
| 76 RTC_CHECK(ret); |
| 77 return ret; |
| 78 } |
| 79 |
| 80 void DeleteGlobalRef(JNIEnv* jni, jobject o) { |
| 81 jni->DeleteGlobalRef(o); |
| 82 CHECK_EXCEPTION(jni) << "Error during DeleteGlobalRef"; |
| 83 } |
| 84 |
| 85 std::string GetThreadId() { |
| 86 char buf[21]; // Big enough to hold a kuint64max plus terminating NULL. |
| 87 int thread_id = gettid(); |
| 88 RTC_CHECK_LT(snprintf(buf, sizeof(buf), "%i", thread_id), |
| 89 static_cast<int>(sizeof(buf))) |
| 90 << "Thread id is bigger than uint64??"; |
| 91 return std::string(buf); |
| 92 } |
| 93 |
| 94 std::string GetThreadInfo() { |
| 95 return "@[tid=" + GetThreadId() + "]"; |
| 96 } |
| 97 |
| 98 AttachThreadScoped::AttachThreadScoped(JavaVM* jvm) |
| 99 : attached_(false), jvm_(jvm), env_(NULL) { |
| 100 env_ = GetEnv(jvm); |
| 101 if (!env_) { |
| 102 // Adding debug log here so we can track down potential leaks and figure |
| 103 // out why we sometimes see "Native thread exiting without having called |
| 104 // DetachCurrentThread" in logcat outputs. |
| 105 ALOGD("Attaching thread to JVM%s", GetThreadInfo().c_str()); |
| 106 jint res = jvm->AttachCurrentThread(&env_, NULL); |
| 107 attached_ = (res == JNI_OK); |
| 108 RTC_CHECK(attached_) << "AttachCurrentThread failed: " << res; |
| 109 } |
| 110 } |
| 111 |
| 112 AttachThreadScoped::~AttachThreadScoped() { |
| 113 if (attached_) { |
| 114 ALOGD("Detaching thread from JVM%s", GetThreadInfo().c_str()); |
| 115 jint res = jvm_->DetachCurrentThread(); |
| 116 RTC_CHECK(res == JNI_OK) << "DetachCurrentThread failed: " << res; |
| 117 RTC_CHECK(!GetEnv(jvm_)); |
| 118 } |
| 119 } |
| 120 |
| 121 JNIEnv* AttachThreadScoped::env() { return env_; } |
| 122 |
| 123 } // namespace webrtc |
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