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1 | /* |
1 | /* |
2 | * Copyright (c) 2006 Josef Cejka |
2 | * Copyright (c) 2006 Josef Cejka |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup kbdgen |
29 | /** @addtogroup kbdgen |
30 | * @brief HelenOS generic uspace keyboard handler. |
30 | * @brief HelenOS generic uspace keyboard handler. |
31 | * @ingroup kbd |
31 | * @ingroup kbd |
32 | * @{ |
32 | * @{ |
33 | */ |
33 | */ |
34 | /** @file |
34 | /** @file |
35 | */ |
35 | */ |
36 | #include <key_buffer.h> |
36 | #include <key_buffer.h> |
37 | #include <futex.h> |
37 | #include <futex.h> |
38 | 38 | ||
39 | atomic_t keybuffer_futex = FUTEX_INITIALIZER; |
39 | atomic_t keybuffer_futex = FUTEX_INITIALIZER; |
40 | 40 | ||
41 | /** Clear key buffer. |
41 | /** Clear key buffer. |
42 | */ |
42 | */ |
43 | void keybuffer_free(keybuffer_t *keybuffer) |
43 | void keybuffer_free(keybuffer_t *keybuffer) |
44 | { |
44 | { |
45 | futex_down(&keybuffer_futex); |
45 | futex_down(&keybuffer_futex); |
46 | keybuffer->head = 0; |
46 | keybuffer->head = 0; |
47 | keybuffer->tail = 0; |
47 | keybuffer->tail = 0; |
48 | keybuffer->items = 0; |
48 | keybuffer->items = 0; |
49 | futex_up(&keybuffer_futex); |
49 | futex_up(&keybuffer_futex); |
50 | } |
50 | } |
51 | 51 | ||
52 | /** Key buffer initialization. |
52 | /** Key buffer initialization. |
53 | * |
53 | * |
54 | */ |
54 | */ |
55 | void keybuffer_init(keybuffer_t *keybuffer) |
55 | void keybuffer_init(keybuffer_t *keybuffer) |
56 | { |
56 | { |
57 | keybuffer_free(keybuffer); |
57 | keybuffer_free(keybuffer); |
58 | } |
58 | } |
59 | 59 | ||
60 | /** Get free space in buffer. |
60 | /** Get free space in buffer. |
61 | * This function is useful for processing some scancodes that are translated |
61 | * This function is useful for processing some scancodes that are translated |
62 | * to more than one character. |
62 | * to more than one character. |
63 | * @return empty buffer space |
63 | * @return empty buffer space |
64 | */ |
64 | */ |
65 | int keybuffer_available(keybuffer_t *keybuffer) |
65 | int keybuffer_available(keybuffer_t *keybuffer) |
66 | { |
66 | { |
67 | return KEYBUFFER_SIZE - keybuffer->items; |
67 | return KEYBUFFER_SIZE - keybuffer->items; |
68 | } |
68 | } |
69 | 69 | ||
70 | /** |
70 | /** |
71 | * @return nonzero, if buffer is not empty. |
71 | * @return nonzero, if buffer is not empty. |
72 | */ |
72 | */ |
73 | int keybuffer_empty(keybuffer_t *keybuffer) |
73 | int keybuffer_empty(keybuffer_t *keybuffer) |
74 | { |
74 | { |
75 | return (keybuffer->items == 0); |
75 | return (keybuffer->items == 0); |
76 | } |
76 | } |
77 | 77 | ||
78 | /** Push key event to key buffer. |
78 | /** Push key event to key buffer. |
79 | * |
79 | * |
80 | * If the buffer is full, the event is ignored. |
80 | * If the buffer is full, the event is ignored. |
81 | * |
81 | * |
82 | * @param keybuffer The keybuffer. |
82 | * @param keybuffer The keybuffer. |
83 | * @param ev The event to push. |
83 | * @param ev The event to push. |
84 | */ |
84 | */ |
85 | void keybuffer_push(keybuffer_t *keybuffer, const kbd_event_t *ev) |
85 | void keybuffer_push(keybuffer_t *keybuffer, const kbd_event_t *ev) |
86 | { |
86 | { |
87 | futex_down(&keybuffer_futex); |
87 | futex_down(&keybuffer_futex); |
88 | if (keybuffer->items < KEYBUFFER_SIZE) { |
88 | if (keybuffer->items < KEYBUFFER_SIZE) { |
89 | keybuffer->fifo[keybuffer->tail] = *ev; |
89 | keybuffer->fifo[keybuffer->tail] = *ev; |
90 | keybuffer->tail = (keybuffer->tail + 1) % KEYBUFFER_SIZE; |
90 | keybuffer->tail = (keybuffer->tail + 1) % KEYBUFFER_SIZE; |
91 | keybuffer->items++; |
91 | keybuffer->items++; |
92 | } |
92 | } |
93 | futex_up(&keybuffer_futex); |
93 | futex_up(&keybuffer_futex); |
94 | } |
94 | } |
95 | 95 | ||
96 | void keybuffer_push0(keybuffer_t *keybuffer, int c) |
- | |
97 | { |
- | |
98 | kbd_event_t ev; |
- | |
99 | - | ||
100 | ev.key = c; ev.mods = 0; ev.c = c; |
- | |
101 | keybuffer_push(keybuffer, &ev); |
- | |
102 | } |
- | |
103 | - | ||
104 | /** Pop event from buffer. |
96 | /** Pop event from buffer. |
105 | * |
97 | * |
106 | * @param edst Pointer to where the event should be saved. |
98 | * @param edst Pointer to where the event should be saved. |
107 | * @return Zero on empty buffer, nonzero otherwise. |
99 | * @return Zero on empty buffer, nonzero otherwise. |
108 | */ |
100 | */ |
109 | int keybuffer_pop(keybuffer_t *keybuffer, kbd_event_t *edst) |
101 | int keybuffer_pop(keybuffer_t *keybuffer, kbd_event_t *edst) |
110 | { |
102 | { |
111 | futex_down(&keybuffer_futex); |
103 | futex_down(&keybuffer_futex); |
112 | if (keybuffer->items > 0) { |
104 | if (keybuffer->items > 0) { |
113 | keybuffer->items--; |
105 | keybuffer->items--; |
114 | *edst = (keybuffer->fifo[keybuffer->head]) ; |
106 | *edst = (keybuffer->fifo[keybuffer->head]) ; |
115 | keybuffer->head = (keybuffer->head + 1) % KEYBUFFER_SIZE; |
107 | keybuffer->head = (keybuffer->head + 1) % KEYBUFFER_SIZE; |
116 | futex_up(&keybuffer_futex); |
108 | futex_up(&keybuffer_futex); |
117 | return 1; |
109 | return 1; |
118 | } |
110 | } |
119 | futex_up(&keybuffer_futex); |
111 | futex_up(&keybuffer_futex); |
120 | return 0; |
112 | return 0; |
121 | } |
113 | } |
122 | 114 | ||
123 | /** |
115 | /** |
124 | * @} |
116 | * @} |
125 | */ |
117 | */ |
126 | 118 |