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2b68989a | 1 | /* |
5de7ce63 | 2 | * This file is part of the sigrok-androidutils project. |
2b68989a MC |
3 | * |
4 | * Copyright (C) 2014 Marcus Comstedt <marcus@mc.pp.se> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include "libsigrokandroidutils.h" | |
21 | #include "libsigrokandroidutils-internal.h" | |
22 | ||
23 | static JavaVM *g_jvm = NULL; | |
24 | static jclass g_environment_class = 0; | |
25 | ||
26 | SRAU_PRIV int srau_get_java_env(JNIEnv **env) | |
27 | { | |
28 | jint st; | |
29 | ||
6f1c3a93 | 30 | if (g_jvm == NULL) |
2b68989a | 31 | return -1; |
2b68989a MC |
32 | |
33 | st = g_jvm->GetEnv((void **)env, JNI_VERSION_1_6); | |
34 | ||
35 | if (st == JNI_EDETACHED) { | |
36 | st = g_jvm->AttachCurrentThread(env, NULL); | |
37 | if (st == JNI_OK) | |
38 | return 1; | |
39 | } | |
40 | ||
41 | return (st == JNI_OK? 0 : -1); | |
42 | } | |
43 | ||
44 | SRAU_PRIV void srau_unget_java_env(int mode) | |
45 | { | |
6f1c3a93 | 46 | if (mode == 1) |
2b68989a | 47 | g_jvm->DetachCurrentThread(); |
2b68989a MC |
48 | } |
49 | ||
50 | SRAU_PRIV jclass srau_get_environment_class(JNIEnv *env) | |
51 | { | |
6f1c3a93 | 52 | if (env && g_environment_class) |
2b68989a | 53 | return (jclass)env->NewLocalRef(g_environment_class); |
6f1c3a93 | 54 | else |
2b68989a | 55 | return 0; |
2b68989a MC |
56 | } |
57 | ||
58 | jint JNI_OnLoad(JavaVM *vm, void *reserved) | |
59 | { | |
6f1c3a93 | 60 | JNIEnv *env; |
2b68989a MC |
61 | |
62 | (void)reserved; | |
63 | ||
6f1c3a93 UH |
64 | if (vm->GetEnv((void **)&env, JNI_VERSION_1_6) != JNI_OK) |
65 | return -1; | |
2b68989a | 66 | |
6f1c3a93 | 67 | jclass envc = env->FindClass("org/sigrok/androidutils/Environment"); |
2b68989a MC |
68 | if (envc) { |
69 | g_environment_class = (jclass)env->NewGlobalRef(envc); | |
70 | env->DeleteLocalRef(envc); | |
71 | } | |
72 | ||
73 | g_jvm = vm; | |
74 | ||
75 | return JNI_VERSION_1_6; | |
76 | } | |
77 | ||
78 | void JNI_OnUnload(JavaVM *vm, void *reserved) | |
79 | { | |
6f1c3a93 | 80 | JNIEnv *env; |
2b68989a MC |
81 | |
82 | (void)reserved; | |
83 | ||
84 | g_jvm = NULL; | |
85 | ||
6f1c3a93 UH |
86 | if (vm->GetEnv((void **)&env, JNI_VERSION_1_6) != JNI_OK) |
87 | return; | |
2b68989a MC |
88 | |
89 | if (g_environment_class) { | |
90 | env->DeleteGlobalRef(g_environment_class); | |
91 | g_environment_class = 0; | |
92 | } | |
93 | } |