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1 | /* This file is part of the Linux Trace Toolkit viewer |
2 | * Copyright (C) 2003-2004 Michel Dagenais |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License Version 2 as |
6 | * published by the Free Software Foundation; |
7 | * |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
11 | * GNU General Public License for more details. |
12 | * |
13 | * You should have received a copy of the GNU General Public License |
14 | * along with this program; if not, write to the Free Software |
15 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
16 | * MA 02111-1307, USA. |
17 | */ |
18 | |
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19 | |
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20 | #include <lttv/hook.h> |
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21 | |
22 | |
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23 | typedef struct _LttvHookClosure { |
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24 | LttvHook hook; |
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25 | void *hook_data; |
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26 | } LttvHookClosure; |
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27 | |
28 | |
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29 | LttvHooks *lttv_hooks_new() |
30 | { |
31 | return g_array_new(FALSE, FALSE, sizeof(LttvHookClosure)); |
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32 | } |
33 | |
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34 | |
35 | void lttv_hooks_destroy(LttvHooks *h) |
36 | { |
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37 | g_critical("lttv_hooks_destroy()"); |
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38 | g_array_free(h, TRUE); |
39 | } |
40 | |
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41 | |
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42 | void lttv_hooks_add(LttvHooks *h, LttvHook f, void *hook_data) |
43 | { |
44 | LttvHookClosure c; |
45 | |
46 | if(h == NULL)g_error("Null hook added"); |
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47 | |
48 | c.hook = f; |
49 | c.hook_data = hook_data; |
50 | g_array_append_val(h,c); |
51 | } |
52 | |
53 | |
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54 | void lttv_hooks_add_list(LttvHooks *h, LttvHooks *list) |
55 | { |
56 | guint i; |
57 | |
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58 | if(list == NULL) return; |
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59 | for(i = 0 ; i < list->len; i++) { |
60 | g_array_append_val(h,g_array_index(list, LttvHookClosure, i)); |
61 | } |
62 | } |
63 | |
64 | |
65 | void *lttv_hooks_remove(LttvHooks *h, LttvHook f) |
66 | { |
67 | unsigned i; |
68 | |
69 | void *hook_data; |
70 | |
71 | LttvHookClosure *c; |
72 | |
73 | for(i = 0 ; i < h->len ; i++) { |
74 | c = &g_array_index(h, LttvHookClosure, i); |
75 | if(c->hook == f) { |
76 | hook_data = c->hook_data; |
77 | lttv_hooks_remove_by_position(h, i); |
78 | return hook_data; |
79 | } |
80 | } |
81 | return NULL; |
82 | } |
83 | |
84 | |
85 | void lttv_hooks_remove_data(LttvHooks *h, LttvHook f, void *hook_data) |
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86 | { |
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87 | unsigned i; |
88 | |
89 | LttvHookClosure *c; |
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90 | |
91 | for(i = 0 ; i < h->len ; i++) { |
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92 | c = &g_array_index(h, LttvHookClosure, i); |
93 | if(c->hook == f && c->hook_data == hook_data) { |
94 | lttv_hooks_remove_by_position(h, i); |
95 | return; |
96 | } |
97 | } |
98 | } |
99 | |
100 | |
101 | void lttv_hooks_remove_list(LttvHooks *h, LttvHooks *list) |
102 | { |
103 | guint i, j; |
104 | |
105 | LttvHookClosure *c, *c_list; |
106 | |
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107 | if(list == NULL) return; |
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108 | for(i = 0, j = 0 ; i < h->len && j < list->len ;) { |
109 | c = &g_array_index(h, LttvHookClosure, i); |
110 | c_list = &g_array_index(list, LttvHookClosure, j); |
111 | if(c->hook == c_list->hook && c->hook_data == c_list->hook_data) { |
112 | lttv_hooks_remove_by_position(h, i); |
113 | j++; |
114 | } |
115 | else i++; |
116 | } |
117 | |
118 | /* Normally the hooks in h are ordered as in list. If this is not the case, |
119 | try harder here. */ |
120 | |
121 | if(j < list->len) { |
122 | for(; j < list->len ; j++) { |
123 | c_list = &g_array_index(list, LttvHookClosure, j); |
124 | lttv_hooks_remove_data(h, c_list->hook, c_list->hook_data); |
125 | } |
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126 | } |
127 | } |
128 | |
129 | |
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130 | unsigned lttv_hooks_number(LttvHooks *h) |
131 | { |
132 | return h->len; |
133 | } |
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134 | |
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135 | |
136 | void lttv_hooks_get(LttvHooks *h, unsigned i, LttvHook *f, void **hook_data) |
137 | { |
138 | LttvHookClosure *c; |
139 | |
140 | c = &g_array_index(h, LttvHookClosure, i); |
141 | *f = c->hook; |
142 | *hook_data = c->hook_data; |
143 | } |
144 | |
145 | |
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146 | void lttv_hooks_remove_by_position(LttvHooks *h, unsigned i) |
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147 | { |
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148 | g_array_remove_index(h, i); |
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149 | } |
150 | |
151 | |
152 | gboolean lttv_hooks_call(LttvHooks *h, void *call_data) |
153 | { |
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154 | gboolean ret, sum_ret = FALSE; |
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155 | |
156 | LttvHookClosure *c; |
157 | |
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158 | guint i; |
159 | |
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160 | if(h != NULL) { |
161 | for(i = 0 ; i < h->len ; i++) { |
162 | c = &g_array_index(h, LttvHookClosure, i); |
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163 | ret = c->hook(c->hook_data,call_data); |
164 | sum_ret = sum_ret || ret; |
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165 | } |
166 | } |
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167 | return sum_ret; |
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168 | } |
169 | |
170 | |
171 | gboolean lttv_hooks_call_check(LttvHooks *h, void *call_data) |
172 | { |
173 | LttvHookClosure *c; |
174 | |
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175 | guint i; |
176 | |
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177 | for(i = 0 ; i < h->len ; i++) { |
178 | c = &g_array_index(h, LttvHookClosure, i); |
179 | if(c->hook(c->hook_data,call_data)) return TRUE; |
180 | } |
181 | return FALSE; |
182 | } |
183 | |
184 | |
185 | LttvHooksById *lttv_hooks_by_id_new() |
186 | { |
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187 | return g_ptr_array_new(); |
188 | } |
189 | |
190 | |
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191 | void lttv_hooks_by_id_destroy(LttvHooksById *h) |
192 | { |
193 | guint i; |
194 | |
195 | for(i = 0 ; i < h->len ; i++) { |
196 | if(h->pdata[i] != NULL) lttv_hooks_destroy((LttvHooks *)(h->pdata[i])); |
197 | } |
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198 | g_ptr_array_free(h, TRUE); |
199 | } |
200 | |
201 | |
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202 | LttvHooks *lttv_hooks_by_id_find(LttvHooksById *h, unsigned id) |
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203 | { |
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204 | if(h->len <= id) g_ptr_array_set_size(h, id + 1); |
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205 | if(h->pdata[id] == NULL) h->pdata[id] = lttv_hooks_new(); |
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206 | return h->pdata[id]; |
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207 | } |
208 | |
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209 | |
210 | unsigned lttv_hooks_by_id_max_id(LttvHooksById *h) |
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211 | { |
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212 | return h->len; |
213 | } |
214 | |
215 | |
216 | LttvHooks *lttv_hooks_by_id_get(LttvHooksById *h, unsigned id) |
217 | { |
218 | if(id < h->len) return h->pdata[id]; |
219 | return NULL; |
220 | } |
221 | |
222 | |
223 | void lttv_hooks_by_id_remove(LttvHooksById *h, unsigned id) |
224 | { |
225 | if(id < h->len && h->pdata[id] != NULL) { |
226 | lttv_hooks_destroy((LttvHooks *)h->pdata[id]); |
227 | h->pdata[id] = NULL; |
228 | } |
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229 | } |
230 | |