summaryrefslogtreecommitdiff
path: root/src/engine.c
blob: 08c5a6d6c4333cbeafe3a2cc8f56ded3b2bf9f06 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
/*
 *  UI Gadget
 *
 * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd. All rights reserved.
 *
 * Contact: Jayoun Lee <airjany@samsung.com>
 *
 * 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.
 *
 */

#include <linux/limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <dlfcn.h>
#include <unistd.h>
#include <sys/types.h>

#include "ug-engine.h"
#include "ug-dbg.h"

#define UG_ENGINE_INIT_SYM "UG_ENGINE_INIT"
#define UG_ENGINE_EXIT_SYM "UG_ENGINE_EXIT"

enum ug_engine_type {
	UG_ENGINE_EFL = 0x00,
};

struct ug_engine *ug_engine_load()
{
	void *handle;
	struct ug_engine *engine;
	int (*engine_init)(struct ug_engine_ops *ops);

	engine = calloc(1, sizeof(struct ug_engine));

	if (!engine) {
		/* LCOV_EXCL_START */
		errno = ENOMEM;
		return NULL;
		/* LCOV_EXCL_STOP */
	}

	handle = dlopen(UG_LIB_DIR"/libui-gadget-1-efl-engine.so", RTLD_LAZY);
	if (!handle) {
		/* LCOV_EXCL_START */
		_ERR("dlopen failed: %s", dlerror());
		goto engine_free;
		/* LCOV_EXCL_STOP */
	}

	engine_init = dlsym(handle, UG_ENGINE_INIT_SYM);
	if (!engine_init) {
		_ERR("dlsym failed: %s", dlerror());
		goto engine_dlclose;
	}

	if (engine_init(&engine->ops))
		goto engine_dlclose;

	engine->handle = handle;
	return engine;

/* LCOV_EXCL_START */
engine_dlclose:
	dlclose(handle);

engine_free:
	free(engine);
	return NULL;
/* LCOV_EXCL_STOP */
}

/* LCOV_EXCL_START */
int ug_engine_unload(struct ug_engine *engine)
{
	void (*engine_exit)(struct ug_engine_ops *ops);

	if (!engine) {
		errno = EINVAL;
		return -1;
	}

	if (engine->handle) {
		engine_exit = dlsym(engine->handle, UG_ENGINE_EXIT_SYM);
		if (engine_exit)
			engine_exit(&engine->ops);
		else
			_ERR("dlsym failed: %s", dlerror());

		dlclose(engine->handle);
	}

	free(engine);
	engine = NULL;
	return 0;
}
/* LCOV_EXCL_STOP */