1 /*
2 * Copyright (C) 2016 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 #define LOG_TAG "EphemeralStorage"
18 //#define LOG_NDEBUG 0
19
20 #include <android-base/logging.h>
21
22 #include "EphemeralStorage.h"
23
24 using ::android::hardware::hidl_string;
25 using ::android::hardware::hidl_vec;
26
27 namespace android {
28
EphemeralStorage()29 EphemeralStorage::EphemeralStorage() {
30 }
31
~EphemeralStorage()32 EphemeralStorage::~EphemeralStorage() {
33 CHECK(mItems.empty())
34 << "All item storage should have been released by now.";
35 }
36
allocStringArray(size_t size)37 hidl_string *EphemeralStorage::allocStringArray(size_t size) {
38 Item item;
39 item.mType = TYPE_STRING_ARRAY;
40 item.mObj = NULL;
41 item.mPtr = new hidl_string[size];
42 mItems.push_back(item);
43
44 return static_cast<hidl_string *>(item.mPtr);
45 }
46
allocTemporaryStorage(size_t size)47 void *EphemeralStorage::allocTemporaryStorage(size_t size) {
48 Item item;
49 item.mType = TYPE_STORAGE;
50 item.mObj = NULL;
51 item.mPtr = malloc(size);
52 mItems.push_back(item);
53
54 return item.mPtr;
55 }
56
allocTemporaryString(JNIEnv * env,jstring stringObj)57 const hidl_string *EphemeralStorage::allocTemporaryString(
58 JNIEnv *env, jstring stringObj) {
59 jstring obj = (jstring)env->NewGlobalRef(stringObj);
60 const char *val = env->GetStringUTFChars(obj, NULL);
61
62 Item item;
63 item.mType = TYPE_STRING;
64 item.mObj = obj;
65 item.mPtr = (void *)val;
66 mItems.push_back(item);
67
68 hidl_string *s = allocStringArray(1 /* size */);
69 s->setToExternal((char *)val, strlen(val));
70
71 return s;
72 }
73
74 #define DEFINE_ALLOC_VECTOR_METHODS(Suffix,Type,NewType) \
75 const hidl_vec<Type> *EphemeralStorage::allocTemporary ## Suffix ## Vector( \
76 JNIEnv *env, Type ## Array arrayObj) { \
77 Type ## Array obj = (Type ## Array)env->NewGlobalRef(arrayObj); \
78 jsize len = env->GetArrayLength(obj); \
79 const Type *val = env->Get ## NewType ## ArrayElements(obj, NULL); \
80 \
81 Item item; \
82 item.mType = TYPE_ ## Suffix ## _ARRAY; \
83 item.mObj = obj; \
84 item.mPtr = (void *)val; \
85 mItems.push_back(item); \
86 \
87 void *vecPtr = allocTemporaryStorage(sizeof(hidl_vec<Type>)); \
88 \
89 hidl_vec<Type> *vec = new (vecPtr) hidl_vec<Type>; \
90 vec->setToExternal(const_cast<Type *>(val), len); \
91 \
92 return vec; \
93 }
94
DEFINE_ALLOC_VECTOR_METHODS(Int8,jbyte,Byte)95 DEFINE_ALLOC_VECTOR_METHODS(Int8,jbyte,Byte)
96 DEFINE_ALLOC_VECTOR_METHODS(Int16,jshort,Short)
97 DEFINE_ALLOC_VECTOR_METHODS(Int32,jint,Int)
98 DEFINE_ALLOC_VECTOR_METHODS(Int64,jlong,Long)
99 DEFINE_ALLOC_VECTOR_METHODS(Float,jfloat,Float)
100 DEFINE_ALLOC_VECTOR_METHODS(Double,jdouble,Double)
101
102 #define DEFINE_RELEASE_ARRAY_CASE(Suffix,Type,NewType) \
103 case TYPE_ ## Suffix ## _ARRAY: \
104 { \
105 env->Release ## NewType ## ArrayElements( \
106 (Type ## Array)item.mObj, \
107 (Type *)item.mPtr, \
108 0 /* mode */); \
109 \
110 env->DeleteGlobalRef(item.mObj); \
111 break; \
112 }
113
114 void EphemeralStorage::release(JNIEnv *env) {
115 for (size_t i = mItems.size(); i--;) {
116 const Item &item = mItems[i];
117
118 switch (item.mType) {
119 case TYPE_STRING_ARRAY:
120 {
121 delete[] static_cast<hidl_string *>(item.mPtr);
122 break;
123 }
124
125 case TYPE_STORAGE:
126 {
127 free(item.mPtr);
128 break;
129 }
130
131 case TYPE_STRING:
132 {
133 env->ReleaseStringUTFChars(
134 (jstring)item.mObj, (const char *)item.mPtr);
135
136 env->DeleteGlobalRef(item.mObj);
137 break;
138 }
139
140 DEFINE_RELEASE_ARRAY_CASE(Int8,jbyte,Byte)
141 DEFINE_RELEASE_ARRAY_CASE(Int16,jshort,Short)
142 DEFINE_RELEASE_ARRAY_CASE(Int32,jint,Int)
143 DEFINE_RELEASE_ARRAY_CASE(Int64,jlong,Long)
144 DEFINE_RELEASE_ARRAY_CASE(Float,jfloat,Float)
145 DEFINE_RELEASE_ARRAY_CASE(Double,jdouble,Double)
146
147 default:
148 CHECK(!"Should not be here");
149 }
150 }
151
152 mItems.clear();
153 }
154
155 } // namespace android
156
157