The Android Open Source Project | 7d814fb | 2009-03-10 16:20:55 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2009 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 | #include "EmojiFactory.h" |
| 18 | |
| 19 | #define LOG_TAG "EmojiFactory" |
| 20 | #include <utils/Log.h> |
| 21 | #include <utils/Vector.h> |
| 22 | |
| 23 | #include <cutils/properties.h> |
| 24 | |
| 25 | #include <dlfcn.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <string.h> |
| 28 | #include <pthread.h> |
| 29 | |
| 30 | |
| 31 | namespace android { |
| 32 | |
| 33 | static pthread_once_t g_once = PTHREAD_ONCE_INIT; |
| 34 | static Vector<EmojiFactory *> *g_factories = NULL; |
| 35 | static Vector<void *> *g_handles = NULL; |
| 36 | |
| 37 | class EmojiFactoryManager { |
| 38 | public: |
Daisuke Miyakawa | e77fc97 | 2009-05-26 14:54:46 +0900 | [diff] [blame] | 39 | void Init(); |
The Android Open Source Project | 7d814fb | 2009-03-10 16:20:55 -0700 | [diff] [blame] | 40 | virtual ~EmojiFactoryManager(); |
| 41 | private: |
| 42 | void TryRegisterEmojiFactory(const char *library_name); |
| 43 | }; |
| 44 | |
| 45 | // Note: I previously did this procedure in the construcor. However, |
| 46 | // property_get() didn't return a correct value in that context. I guess |
| 47 | // property_get() does not return correct values before AndroidRuntime |
| 48 | // instance (or exactly, AppRuntime in instance app_main.cpp) is |
| 49 | // fully ready (see AndroidRunitem.cpp and app_main.cpp). |
| 50 | // So, instead of doing this in constructor, I decided this shoud be done |
| 51 | // when a user requires to EmojiFactory, which makes better sense to me. |
Daisuke Miyakawa | e77fc97 | 2009-05-26 14:54:46 +0900 | [diff] [blame] | 52 | void EmojiFactoryManager::Init() { |
The Android Open Source Project | 7d814fb | 2009-03-10 16:20:55 -0700 | [diff] [blame] | 53 | g_handles = new Vector<void *>(); |
| 54 | g_factories = new Vector<EmojiFactory *>(); |
| 55 | |
| 56 | char *emoji_libraries = new char[PROPERTY_VALUE_MAX]; |
| 57 | int len = property_get("ro.config.libemoji", emoji_libraries, ""); |
Steve Block | 4fa0356 | 2011-12-20 16:22:43 +0000 | [diff] [blame] | 58 | // ALOGD("ro.config.libemoji: %s", emoji_libraries); |
The Android Open Source Project | 7d814fb | 2009-03-10 16:20:55 -0700 | [diff] [blame] | 59 | if (len > 0) { |
| 60 | char *saveptr, *ptr; |
| 61 | ptr = emoji_libraries; |
| 62 | while (true) { |
| 63 | ptr = strtok_r(ptr, ":", &saveptr); |
| 64 | if (NULL == ptr) { |
| 65 | break; |
| 66 | } |
| 67 | TryRegisterEmojiFactory(ptr); |
| 68 | ptr = NULL; |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | delete [] emoji_libraries; |
| 73 | } |
| 74 | |
| 75 | void EmojiFactoryManager::TryRegisterEmojiFactory(const char *library_name) { |
| 76 | void *handle = dlopen(library_name, RTLD_LAZY | RTLD_LOCAL); |
Daisuke Miyakawa | e77fc97 | 2009-05-26 14:54:46 +0900 | [diff] [blame] | 77 | if (handle == NULL) { |
| 78 | const char* error_str = dlerror(); |
| 79 | if (error_str) { |
| 80 | error_str = "Unknown reason"; |
| 81 | } |
Steve Block | 0805d75 | 2012-01-06 19:18:46 +0000 | [diff] [blame] | 82 | ALOGE("Failed to load shared library %s: %s", library_name, error_str); |
The Android Open Source Project | 7d814fb | 2009-03-10 16:20:55 -0700 | [diff] [blame] | 83 | return; |
| 84 | } |
| 85 | EmojiFactory *(*get_emoji_factory)() = |
| 86 | reinterpret_cast<EmojiFactory *(*)()>(dlsym(handle, |
| 87 | "GetEmojiFactory")); |
Daisuke Miyakawa | e77fc97 | 2009-05-26 14:54:46 +0900 | [diff] [blame] | 88 | if (get_emoji_factory == NULL) { |
| 89 | const char* error_str = dlerror(); |
| 90 | if (error_str) { |
| 91 | error_str = "Unknown reason"; |
| 92 | } |
Steve Block | 0805d75 | 2012-01-06 19:18:46 +0000 | [diff] [blame] | 93 | ALOGE("Failed to call GetEmojiFactory: %s", error_str); |
The Android Open Source Project | 7d814fb | 2009-03-10 16:20:55 -0700 | [diff] [blame] | 94 | dlclose(handle); |
| 95 | return; |
| 96 | } |
| 97 | |
| 98 | EmojiFactory *factory = (*get_emoji_factory)(); |
| 99 | if (NULL == factory) { |
Steve Block | 0805d75 | 2012-01-06 19:18:46 +0000 | [diff] [blame] | 100 | ALOGE("Returned factory is NULL"); |
The Android Open Source Project | 7d814fb | 2009-03-10 16:20:55 -0700 | [diff] [blame] | 101 | dlclose(handle); |
| 102 | return; |
| 103 | } |
| 104 | |
| 105 | const char *name = factory->Name(); |
| 106 | |
| 107 | size_t size = g_factories->size(); |
| 108 | for (size_t i = 0; i < size; ++i) { |
| 109 | EmojiFactory *f = g_factories->itemAt(i); |
| 110 | if (!strcmp(name, f->Name())) { |
Steve Block | 0805d75 | 2012-01-06 19:18:46 +0000 | [diff] [blame] | 111 | ALOGE("Same EmojiFactory was found: %s", name); |
The Android Open Source Project | 7d814fb | 2009-03-10 16:20:55 -0700 | [diff] [blame] | 112 | delete factory; |
| 113 | dlclose(handle); |
| 114 | return; |
| 115 | } |
| 116 | } |
| 117 | g_factories->push(factory); |
| 118 | // dlclose() must not be called here, since returned factory may point to |
| 119 | // static data in the shared library (like "static const char* = "emoji";") |
| 120 | g_handles->push(handle); |
The Android Open Source Project | 7d814fb | 2009-03-10 16:20:55 -0700 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | EmojiFactoryManager::~EmojiFactoryManager() { |
| 124 | if (g_factories != NULL) { |
| 125 | size_t size = g_factories->size(); |
| 126 | for (size_t i = 0; i < size; ++i) { |
| 127 | delete g_factories->itemAt(i); |
| 128 | } |
| 129 | delete g_factories; |
| 130 | } |
| 131 | |
| 132 | if (g_handles != NULL) { |
| 133 | size_t size = g_handles->size(); |
| 134 | for (size_t i = 0; i < size; ++i) { |
| 135 | dlclose(g_handles->itemAt(i)); |
| 136 | } |
| 137 | delete g_handles; |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | static EmojiFactoryManager g_registrar; |
| 142 | |
| 143 | static void InitializeEmojiFactory() { |
Daisuke Miyakawa | e77fc97 | 2009-05-26 14:54:46 +0900 | [diff] [blame] | 144 | g_registrar.Init(); |
The Android Open Source Project | 7d814fb | 2009-03-10 16:20:55 -0700 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | /* static */ |
| 148 | EmojiFactory *EmojiFactory::GetImplementation(const char *name) { |
| 149 | pthread_once(&g_once, InitializeEmojiFactory); |
| 150 | if (NULL == name) { |
| 151 | return NULL; |
| 152 | } |
| 153 | size_t size = g_factories->size(); |
| 154 | for (size_t i = 0; i < size; ++i) { |
| 155 | EmojiFactory *factory = g_factories->itemAt(i); |
| 156 | if (!strcmp(name, factory->Name())) { |
| 157 | return factory; |
| 158 | } |
| 159 | } |
| 160 | return NULL; |
| 161 | } |
| 162 | |
| 163 | /* static */ |
| 164 | EmojiFactory *EmojiFactory::GetAvailableImplementation() { |
| 165 | pthread_once(&g_once, InitializeEmojiFactory); |
| 166 | size_t size = g_factories->size(); |
The Android Open Source Project | 7d814fb | 2009-03-10 16:20:55 -0700 | [diff] [blame] | 167 | for (size_t i = 0; i < size; ++i) { |
| 168 | EmojiFactory *factory = g_factories->itemAt(i); |
| 169 | return factory; |
| 170 | } |
| 171 | return NULL; |
| 172 | } |
| 173 | |
| 174 | } // namespace android |
| 175 | |
The Android Open Source Project | 7d814fb | 2009-03-10 16:20:55 -0700 | [diff] [blame] | 176 | extern "C" android::EmojiFactory *GetImplementation( |
| 177 | const char *name) { |
| 178 | return android::EmojiFactory::GetImplementation(name); |
| 179 | } |
| 180 | |
| 181 | extern "C" android::EmojiFactory *GetAvailableImplementation() { |
| 182 | return android::EmojiFactory::GetAvailableImplementation(); |
| 183 | } |