AndroidRuntime.h revision 3bc6bbc92cd2095f42039b5aadd0a14d0e5d9230 
1/*
2 * Copyright (C) 2005 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17//
18
19#ifndef _RUNTIME_ANDROID_RUNTIME_H
20#define _RUNTIME_ANDROID_RUNTIME_H
21
22#include <utils/Errors.h>
23#include <binder/IBinder.h>
24#include <utils/String8.h>
25#include <utils/String16.h>
26#include <utils/Vector.h>
27#include <utils/threads.h>
28#include <pthread.h>
29#include <nativehelper/jni.h>
30
31
32namespace android {
33
34class AndroidRuntime
35{
36public:
37    AndroidRuntime();
38    virtual ~AndroidRuntime();
39
40    enum StartMode {
41        Zygote,
42        SystemServer,
43        Application,
44        Tool,
45    };
46
47    /**
48     * Register a set of methods in the specified class.
49     */
50    static int registerNativeMethods(JNIEnv* env,
51        const char* className, const JNINativeMethod* gMethods, int numMethods);
52
53    /**
54     * Call a class's static main method with the given arguments,
55     */
56    status_t callMain(const char* className, jclass clazz, int argc,
57        const char* const argv[]);
58
59    /**
60     * Find a class, with the input either of the form
61     * "package/class" or "package.class".
62     */
63    static jclass findClass(JNIEnv* env, const char* className);
64
65    int addVmArguments(int argc, const char* const argv[]);
66
67    void start(const char *classname, const char* options);
68
69    static AndroidRuntime* getRuntime();
70
71    /**
72     * This gets called after the VM has been created, but before we
73     * run any code. Override it to make any FindClass calls that need
74     * to use CLASSPATH.
75     */
76    virtual void onVmCreated(JNIEnv* env);
77
78    /**
79     * This gets called after the JavaVM has initialized.  Override it
80     * with the system's native entry point.
81     */
82    virtual void onStarted() = 0;
83
84    /**
85     * This gets called after the JavaVM has initialized after a Zygote
86     * fork. Override it to initialize threads, etc. Upon return, the
87     * correct static main will be invoked.
88     */
89    virtual void onZygoteInit() {};
90
91
92    /**
93     * Called when the Java application exits.  The default
94     * implementation calls exit(code).
95     */
96    virtual void onExit(int code);
97
98    /** create a new thread that is visible from Java */
99    static android_thread_id_t createJavaThread(const char* name, void (*start)(void *),
100        void* arg);
101
102    /** return a pointer to the VM running in this process */
103    static JavaVM* getJavaVM() { return mJavaVM; }
104
105    /** return a pointer to the JNIEnv pointer for this thread */
106    static JNIEnv* getJNIEnv();
107
108    /** return a new string corresponding to 'className' with all '.'s replaced by '/'s. */
109    static char* toSlashClassName(const char* className);
110
111private:
112    static int startReg(JNIEnv* env);
113    void parseExtraOpts(char* extraOptsBuf);
114    int startVm(JavaVM** pJavaVM, JNIEnv** pEnv);
115
116    Vector<JavaVMOption> mOptions;
117
118    /* JNI JavaVM pointer */
119    static JavaVM* mJavaVM;
120
121    /*
122     * Thread creation helpers.
123     */
124    static int javaCreateThreadEtc(
125                                android_thread_func_t entryFunction,
126                                void* userData,
127                                const char* threadName,
128                                int32_t threadPriority,
129                                size_t threadStackSize,
130                                android_thread_id_t* threadId);
131    static int javaThreadShell(void* args);
132};
133
134}
135
136#endif
137