1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "hcs_dm_parser.h"
17 #include <pthread.h>
18 #include "hcs_blob_if.h"
19 #include "hcs_blob_load.h"
20 #include "hcs_parser.h"
21 #include "hdf_log.h"
22 #include "osal_mem.h"
23
24 #define HDF_LOG_TAG hcs_dm_parser
25 static char *g_hcsBlob = NULL;
26 static struct DeviceResourceNode *g_hcsTreeRoot = NULL;
27 static const char *g_hcsBlobPath = NULL;
28 static pthread_mutex_t g_getDmRootMutex = PTHREAD_MUTEX_INITIALIZER;
29
ReleaseHcsTree(void)30 void ReleaseHcsTree(void)
31 {
32 OsalMemFree(g_hcsTreeRoot);
33 g_hcsTreeRoot = NULL;
34 OsalMemFree(g_hcsBlob);
35 g_hcsBlob = NULL;
36 }
37
SetHcsBlobPath(const char * path)38 void SetHcsBlobPath(const char *path)
39 {
40 if (g_hcsBlobPath != NULL) {
41 OsalMemFree((void *)g_hcsBlobPath);
42 }
43 g_hcsBlobPath = strdup(path);
44 }
45
CreateHcsToTree(void)46 static bool CreateHcsToTree(void)
47 {
48 bool ret = true;
49 do {
50 uint32_t length = OpenHcsBlobFile(g_hcsBlobPath, &g_hcsBlob);
51 if (length == 0) {
52 ret = false;
53 break;
54 }
55 if (!HcsCheckBlobFormat(g_hcsBlob, length)) {
56 ret = false;
57 break;
58 }
59 if (!HcsDecompile((const char *)g_hcsBlob, HBC_HEADER_LENGTH, &g_hcsTreeRoot)) {
60 ret = false;
61 break;
62 }
63 } while (0);
64
65 if (!ret) {
66 ReleaseHcsTree();
67 }
68 return ret;
69 }
70
HcsGetRootNode(void)71 const struct DeviceResourceNode *HcsGetRootNode(void)
72 {
73 if (g_hcsTreeRoot == NULL) {
74 pthread_mutex_lock(&g_getDmRootMutex);
75 if ((g_hcsTreeRoot == NULL) && !CreateHcsToTree()) {
76 pthread_mutex_unlock(&g_getDmRootMutex);
77 HDF_LOGE("%{public}s is failed", __func__);
78 return NULL;
79 }
80 pthread_mutex_unlock(&g_getDmRootMutex);
81 }
82 return g_hcsTreeRoot;
83 }