1/*
2**
3** Copyright 2015, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#ifndef ANDROID_RESOURCEMANAGERSERVICE_H
19#define ANDROID_RESOURCEMANAGERSERVICE_H
20
21#include <arpa/inet.h>
22#include <binder/BinderService.h>
23#include <utils/Errors.h>
24#include <utils/KeyedVector.h>
25#include <utils/String8.h>
26#include <utils/threads.h>
27#include <utils/Vector.h>
28
29#include <media/IResourceManagerService.h>
30
31namespace android {
32
33class ServiceLog;
34struct ProcessInfoInterface;
35
36struct ResourceInfo {
37    int64_t clientId;
38    sp<IResourceManagerClient> client;
39    Vector<MediaResource> resources;
40};
41
42typedef Vector<ResourceInfo> ResourceInfos;
43typedef KeyedVector<int, ResourceInfos> PidResourceInfosMap;
44
45class ResourceManagerService
46    : public BinderService<ResourceManagerService>,
47      public BnResourceManagerService
48{
49public:
50    static char const *getServiceName() { return "media.resource_manager"; }
51
52    virtual status_t dump(int fd, const Vector<String16>& args);
53
54    ResourceManagerService();
55    ResourceManagerService(sp<ProcessInfoInterface> processInfo);
56
57    // IResourceManagerService interface
58    virtual void config(const Vector<MediaResourcePolicy> &policies);
59
60    virtual void addResource(
61            int pid,
62            int64_t clientId,
63            const sp<IResourceManagerClient> client,
64            const Vector<MediaResource> &resources);
65
66    virtual void removeResource(int pid, int64_t clientId);
67
68    // Tries to reclaim resource from processes with lower priority than the calling process
69    // according to the requested resources.
70    // Returns true if any resource has been reclaimed, otherwise returns false.
71    virtual bool reclaimResource(int callingPid, const Vector<MediaResource> &resources);
72
73protected:
74    virtual ~ResourceManagerService();
75
76private:
77    friend class ResourceManagerServiceTest;
78
79    // Gets the list of all the clients who own the specified resource type.
80    // Returns false if any client belongs to a process with higher priority than the
81    // calling process. The clients will remain unchanged if returns false.
82    bool getAllClients_l(int callingPid, MediaResource::Type type,
83            Vector<sp<IResourceManagerClient>> *clients);
84
85    // Gets the client who owns specified resource type from lowest possible priority process.
86    // Returns false if the calling process priority is not higher than the lowest process
87    // priority. The client will remain unchanged if returns false.
88    bool getLowestPriorityBiggestClient_l(int callingPid, MediaResource::Type type,
89            sp<IResourceManagerClient> *client);
90
91    // Gets lowest priority process that has the specified resource type.
92    // Returns false if failed. The output parameters will remain unchanged if failed.
93    bool getLowestPriorityPid_l(MediaResource::Type type, int *pid, int *priority);
94
95    // Gets the client who owns biggest piece of specified resource type from pid.
96    // Returns false if failed. The client will remain unchanged if failed.
97    bool getBiggestClient_l(int pid, MediaResource::Type type, sp<IResourceManagerClient> *client);
98
99    bool isCallingPriorityHigher_l(int callingPid, int pid);
100
101    // A helper function basically calls getLowestPriorityBiggestClient_l and add the result client
102    // to the given Vector.
103    void getClientForResource_l(
104        int callingPid, const MediaResource *res, Vector<sp<IResourceManagerClient>> *clients);
105
106    mutable Mutex mLock;
107    sp<ProcessInfoInterface> mProcessInfo;
108    sp<ServiceLog> mServiceLog;
109    PidResourceInfosMap mMap;
110    bool mSupportsMultipleSecureCodecs;
111    bool mSupportsSecureWithNonSecureCodec;
112};
113
114// ----------------------------------------------------------------------------
115
116}; // namespace android
117
118#endif // ANDROID_RESOURCEMANAGERSERVICE_H
119