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 "driver_loader_full.h"
17
18 #include <dlfcn.h>
19 #include <errno.h>
20 #include <stdlib.h>
21
22 #include "securec.h"
23
24 #include "hdf_log.h"
25 #include "hdf_object_manager.h"
26 #include "osal_mem.h"
27
28 #define DRIVER_DESC "driverDesc"
29 #define HDF_LOG_TAG driver_loader_full
30
31 static struct DriverLoaderFull *g_fullLoader = NULL;
32
HdfDriverLoaderGetDriver(const char * moduleName)33 struct HdfDriver *HdfDriverLoaderGetDriver(const char *moduleName)
34 {
35 if (moduleName == NULL) {
36 return NULL;
37 }
38
39 struct HdfDriver *driver = OsalMemAlloc(sizeof(struct HdfDriver));
40 if (driver == NULL) {
41 return NULL;
42 }
43
44 void *handle = dlopen(moduleName, RTLD_LAZY);
45 if (handle == NULL) {
46 HDF_LOGE("get driver handle, %{public}s dlopen failed, %{public}s", moduleName, dlerror());
47 OsalMemFree(driver);
48 return NULL;
49 }
50
51 struct HdfDriverEntry **driverEntry = (struct HdfDriverEntry **)dlsym(handle, DRIVER_DESC);
52 if (driverEntry == NULL) {
53 HDF_LOGE("get driver entry %{public}s dlsym failed", moduleName);
54 dlclose(handle);
55 OsalMemFree(driver);
56 return NULL;
57 }
58
59 driver->entry = *driverEntry;
60 driver->priv = handle;
61
62 return driver;
63 }
64
HdfDriverLoaderFullReclaimDriver(struct HdfDriver * driver)65 void HdfDriverLoaderFullReclaimDriver(struct HdfDriver *driver)
66 {
67 if (driver == NULL) {
68 return;
69 }
70
71 OsalMemFree(driver);
72 }
73
HdfDriverLoaderFullConstruct(struct DriverLoaderFull * inst)74 void HdfDriverLoaderFullConstruct(struct DriverLoaderFull *inst)
75 {
76 struct HdfDriverLoader *pvtbl = (struct HdfDriverLoader *)inst;
77 pvtbl->super.GetDriver = HdfDriverLoaderGetDriver;
78 pvtbl->super.ReclaimDriver = HdfDriverLoaderFullReclaimDriver;
79 }
80
HdfDriverLoaderFullCreate(void)81 struct HdfObject *HdfDriverLoaderFullCreate(void)
82 {
83 if (g_fullLoader == NULL) {
84 struct DriverLoaderFull *instance =
85 (struct DriverLoaderFull *)OsalMemCalloc(sizeof(struct DriverLoaderFull));
86 if (instance != NULL) {
87 HdfDriverLoaderFullConstruct(instance);
88 g_fullLoader = instance;
89 }
90 }
91 return (struct HdfObject *)g_fullLoader;
92 }
93
HdfDriverLoaderFullRelease(struct HdfObject * object)94 void HdfDriverLoaderFullRelease(struct HdfObject *object)
95 {
96 struct DriverLoaderFull *instance = (struct DriverLoaderFull *)object;
97 if (instance == g_fullLoader) {
98 g_fullLoader = NULL;
99 }
100 if (instance != NULL) {
101 OsalMemFree(instance);
102 }
103 }
104
HdfDriverLoaderGetInstance(void)105 struct IDriverLoader *HdfDriverLoaderGetInstance(void)
106 {
107 static struct IDriverLoader *instance = NULL;
108 if (instance == NULL) {
109 instance = (struct IDriverLoader *)HdfObjectManagerGetObject(HDF_OBJECT_ID_DRIVER_LOADER);
110 }
111 return instance;
112 }
113