| 1 | /* |
| 2 | * fs.c |
| 3 | * |
| 4 | * Babeltrace CTF file system Reader Component |
| 5 | * |
| 6 | * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 7 | * |
| 8 | * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 9 | * |
| 10 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 11 | * of this software and associated documentation files (the "Software"), to deal |
| 12 | * in the Software without restriction, including without limitation the rights |
| 13 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 14 | * copies of the Software, and to permit persons to whom the Software is |
| 15 | * furnished to do so, subject to the following conditions: |
| 16 | * |
| 17 | * The above copyright notice and this permission notice shall be included in |
| 18 | * all copies or substantial portions of the Software. |
| 19 | * |
| 20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 23 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 24 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 25 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 26 | * SOFTWARE. |
| 27 | */ |
| 28 | |
| 29 | #include <babeltrace/plugin/plugin-system.h> |
| 30 | #include <babeltrace/plugin/notification/iterator.h> |
| 31 | #include <glib.h> |
| 32 | #include <assert.h> |
| 33 | #include "fs-internal.h" |
| 34 | |
| 35 | static bool ctf_fs_debug; |
| 36 | |
| 37 | static |
| 38 | struct bt_notification *ctf_fs_iterator_get( |
| 39 | struct bt_notification_iterator *iterator) |
| 40 | { |
| 41 | return NULL; |
| 42 | } |
| 43 | |
| 44 | static |
| 45 | enum bt_notification_iterator_status ctf_fs_iterator_next( |
| 46 | struct bt_notification_iterator *iterator) |
| 47 | { |
| 48 | return BT_NOTIFICATION_ITERATOR_STATUS_UNSUPPORTED; |
| 49 | } |
| 50 | |
| 51 | static |
| 52 | void ctf_fs_iterator_destroy_data(struct ctf_fs_iterator *ctf_it) |
| 53 | { |
| 54 | g_free(ctf_it); |
| 55 | } |
| 56 | |
| 57 | static |
| 58 | void ctf_fs_iterator_destroy(struct bt_notification_iterator *it) |
| 59 | { |
| 60 | void *data = bt_notification_iterator_get_private_data(it); |
| 61 | |
| 62 | ctf_fs_iterator_destroy_data(data); |
| 63 | } |
| 64 | |
| 65 | static |
| 66 | enum bt_component_status ctf_fs_iterator_init(struct bt_component *source, |
| 67 | struct bt_notification_iterator *it) |
| 68 | { |
| 69 | enum bt_component_status ret = BT_COMPONENT_STATUS_OK; |
| 70 | struct ctf_fs_iterator *ctf_it; |
| 71 | |
| 72 | assert(source && it); |
| 73 | ctf_it = g_new0(struct ctf_fs_iterator, 1); |
| 74 | if (!ctf_it) { |
| 75 | ret = BT_COMPONENT_STATUS_NOMEM; |
| 76 | goto end; |
| 77 | } |
| 78 | |
| 79 | ret = bt_notification_iterator_set_get_cb(it, ctf_fs_iterator_get); |
| 80 | if (ret) { |
| 81 | goto error; |
| 82 | } |
| 83 | |
| 84 | ret = bt_notification_iterator_set_next_cb(it, ctf_fs_iterator_next); |
| 85 | if (ret) { |
| 86 | goto error; |
| 87 | } |
| 88 | |
| 89 | ret = bt_notification_iterator_set_destroy_cb(it, |
| 90 | ctf_fs_iterator_destroy); |
| 91 | if (ret) { |
| 92 | goto error; |
| 93 | } |
| 94 | |
| 95 | ret = bt_notification_iterator_set_private_data(it, ctf_it); |
| 96 | if (ret) { |
| 97 | goto error; |
| 98 | } |
| 99 | end: |
| 100 | return ret; |
| 101 | error: |
| 102 | (void) bt_notification_iterator_set_private_data(it, NULL); |
| 103 | ctf_fs_iterator_destroy_data(ctf_it); |
| 104 | return ret; |
| 105 | } |
| 106 | |
| 107 | static |
| 108 | struct ctf_fs_component *ctf_fs_create(struct bt_value *params) |
| 109 | { |
| 110 | return g_new0(struct ctf_fs_component, 1); |
| 111 | } |
| 112 | |
| 113 | static |
| 114 | void ctf_fs_destroy_data(struct ctf_fs_component *component) |
| 115 | { |
| 116 | g_free(component); |
| 117 | } |
| 118 | |
| 119 | static |
| 120 | void ctf_fs_destroy(struct bt_component *component) |
| 121 | { |
| 122 | void *data = bt_component_get_private_data(component); |
| 123 | |
| 124 | ctf_fs_destroy_data(data); |
| 125 | } |
| 126 | |
| 127 | BT_HIDDEN |
| 128 | enum bt_component_status ctf_fs_init(struct bt_component *source, |
| 129 | struct bt_value *params) |
| 130 | { |
| 131 | struct ctf_fs_component *ctf_fs; |
| 132 | enum bt_component_status ret = BT_COMPONENT_STATUS_OK; |
| 133 | |
| 134 | assert(source); |
| 135 | ctf_fs_debug = g_strcmp0(getenv("CTF_FS_DEBUG"), "1") == 0; |
| 136 | ctf_fs = ctf_fs_create(params); |
| 137 | if (!ctf_fs) { |
| 138 | ret = BT_COMPONENT_STATUS_NOMEM; |
| 139 | goto end; |
| 140 | } |
| 141 | |
| 142 | ret = bt_component_set_destroy_cb(source, ctf_fs_destroy); |
| 143 | if (ret != BT_COMPONENT_STATUS_OK) { |
| 144 | goto error; |
| 145 | } |
| 146 | |
| 147 | ret = bt_component_set_private_data(source, ctf_fs); |
| 148 | if (ret != BT_COMPONENT_STATUS_OK) { |
| 149 | goto error; |
| 150 | } |
| 151 | |
| 152 | ret = bt_component_source_set_iterator_init_cb(source, |
| 153 | ctf_fs_iterator_init); |
| 154 | if (ret != BT_COMPONENT_STATUS_OK) { |
| 155 | goto error; |
| 156 | } |
| 157 | end: |
| 158 | return ret; |
| 159 | error: |
| 160 | (void) bt_component_set_private_data(source, NULL); |
| 161 | ctf_fs_destroy_data(ctf_fs); |
| 162 | return ret; |
| 163 | } |