1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/*
* 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 "webrtc/base/checks.h"
#include "webrtc/modules/utility/interface/helpers_android.h"
#include <android/log.h>
#include <assert.h>
#include <pthread.h>
#include <stddef.h>
#include <unistd.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";
}
std::string GetThreadId() {
char buf[21]; // Big enough to hold a kuint64max plus terminating NULL.
int thread_id = gettid();
RTC_CHECK_LT(snprintf(buf, sizeof(buf), "%i", thread_id),
static_cast<int>(sizeof(buf)))
<< "Thread id is bigger than uint64??";
return std::string(buf);
}
std::string GetThreadInfo() {
return "@[tid=" + GetThreadId() + "]";
}
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%s", GetThreadInfo().c_str());
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%s", GetThreadInfo().c_str());
jint res = jvm_->DetachCurrentThread();
RTC_CHECK(res == JNI_OK) << "DetachCurrentThread failed: " << res;
RTC_CHECK(!GetEnv(jvm_));
}
}
JNIEnv* AttachThreadScoped::env() { return env_; }
} // namespace webrtc
|
