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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "NStorage"
#include <android/storage_manager.h>
#include <storage/IMountService.h>
#include <binder/Binder.h>
#include <binder/IServiceManager.h>
#include <utils/Atomic.h>
#include <utils/Log.h>
#include <utils/RefBase.h>
#include <utils/String8.h>
#include <utils/String16.h>
#include <utils/Vector.h>
#include <utils/threads.h>
using namespace android;
struct ObbActionListener : public BnObbActionListener {
private:
sp<AStorageManager> mStorageManager;
public:
ObbActionListener(AStorageManager* mgr) :
mStorageManager(mgr)
{}
virtual void onObbResult(const android::String16& filename, const int32_t nonce,
const int32_t state);
};
class ObbCallback {
public:
ObbCallback(int32_t _nonce, AStorageManager_obbCallbackFunc _cb, void* _data)
: nonce(_nonce)
, cb(_cb)
, data(_data)
{}
int32_t nonce;
AStorageManager_obbCallbackFunc cb;
void* data;
};
struct AStorageManager : public RefBase {
protected:
Mutex mCallbackLock;
Vector<ObbCallback*> mCallbacks;
volatile int32_t mNextNonce;
sp<ObbActionListener> mObbActionListener;
sp<IMountService> mMountService;
int32_t getNextNonce() {
return android_atomic_inc(&mNextNonce);
}
ObbCallback* registerObbCallback(AStorageManager_obbCallbackFunc func, void* data) {
ObbCallback* cb = new ObbCallback(getNextNonce(), func, data);
{
AutoMutex _l(mCallbackLock);
mCallbacks.push(cb);
}
return cb;
}
public:
AStorageManager()
{
}
bool initialize() {
sp<IServiceManager> sm = defaultServiceManager();
if (sm == NULL) {
LOGE("Couldn't get default ServiceManager\n");
return false;
}
mMountService = interface_cast<IMountService>(sm->getService(String16("mount")));
if (mMountService == NULL) {
LOGE("Couldn't get connection to MountService\n");
return false;
}
mObbActionListener = new ObbActionListener(this);
return true;
}
void fireCallback(const char* filename, const int32_t nonce, const int32_t state) {
ObbCallback* target = NULL;
{
AutoMutex _l(mCallbackLock);
int N = mCallbacks.size();
for (int i = 0; i < N; i++) {
ObbCallback* cb = mCallbacks.editItemAt(i);
if (cb->nonce == nonce) {
target = cb;
mCallbacks.removeAt(i);
break;
}
}
}
if (target != NULL) {
target->cb(filename, state, target->data);
delete target;
} else {
ALOGI("Didn't find the callback handler for: %s\n", filename);
}
}
void mountObb(const char* filename, const char* key, AStorageManager_obbCallbackFunc func, void* data) {
ObbCallback* cb = registerObbCallback(func, data);
String16 filename16(filename);
String16 key16(key);
mMountService->mountObb(filename16, key16, mObbActionListener, cb->nonce);
}
void unmountObb(const char* filename, const bool force, AStorageManager_obbCallbackFunc func, void* data) {
ObbCallback* cb = registerObbCallback(func, data);
String16 filename16(filename);
mMountService->unmountObb(filename16, force, mObbActionListener, cb->nonce);
}
int isObbMounted(const char* filename) {
String16 filename16(filename);
return mMountService->isObbMounted(filename16);
}
const char* getMountedObbPath(const char* filename) {
String16 filename16(filename);
String16 path16;
if (mMountService->getMountedObbPath(filename16, path16)) {
return String8(path16).string();
} else {
return NULL;
}
}
};
void ObbActionListener::onObbResult(const android::String16& filename, const int32_t nonce, const int32_t state) {
mStorageManager->fireCallback(String8(filename).string(), nonce, state);
}
AStorageManager* AStorageManager_new() {
sp<AStorageManager> mgr = new AStorageManager();
if (mgr == NULL || !mgr->initialize()) {
return NULL;
}
mgr->incStrong((void*)AStorageManager_new);
return static_cast<AStorageManager*>(mgr.get());
}
void AStorageManager_delete(AStorageManager* mgr) {
if (mgr) {
mgr->decStrong((void*)AStorageManager_new);
}
}
void AStorageManager_mountObb(AStorageManager* mgr, const char* filename, const char* key,
AStorageManager_obbCallbackFunc cb, void* data) {
mgr->mountObb(filename, key, cb, data);
}
void AStorageManager_unmountObb(AStorageManager* mgr, const char* filename, const int force,
AStorageManager_obbCallbackFunc cb, void* data) {
mgr->unmountObb(filename, force != 0, cb, data);
}
int AStorageManager_isObbMounted(AStorageManager* mgr, const char* filename) {
return mgr->isObbMounted(filename) != 0;
}
const char* AStorageManager_getMountedObbPath(AStorageManager* mgr, const char* filename) {
return mgr->getMountedObbPath(filename);
}
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