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31 | * @ingroup kbd |
31 | * @ingroup kbd |
32 | * @{ |
32 | * @{ |
33 | */ |
33 | */ |
34 | /** @file |
34 | /** @file |
35 | */ |
35 | */ |
- | 36 | ||
36 | #include <key_buffer.h> |
37 | #include <keybuffer.h> |
37 | #include <futex.h> |
38 | #include <futex.h> |
38 | 39 | ||
39 | atomic_t keybuffer_futex = FUTEX_INITIALIZER; |
40 | atomic_t keybuffer_futex = FUTEX_INITIALIZER; |
40 | 41 | ||
41 | /** Clear key buffer. |
42 | /** Clear key buffer. |
Line 56... | Line 57... | ||
56 | { |
57 | { |
57 | keybuffer_free(keybuffer); |
58 | keybuffer_free(keybuffer); |
58 | } |
59 | } |
59 | 60 | ||
60 | /** Get free space in buffer. |
61 | /** Get free space in buffer. |
- | 62 | * |
|
61 | * This function is useful for processing some scancodes that are translated |
63 | * This function is useful for processing some scancodes that are translated |
62 | * to more than one character. |
64 | * to more than one character. |
- | 65 | * |
|
63 | * @return empty buffer space |
66 | * @return empty buffer space |
- | 67 | * |
|
64 | */ |
68 | */ |
65 | int keybuffer_available(keybuffer_t *keybuffer) |
69 | size_t keybuffer_available(keybuffer_t *keybuffer) |
66 | { |
70 | { |
67 | return KEYBUFFER_SIZE - keybuffer->items; |
71 | return KEYBUFFER_SIZE - keybuffer->items; |
68 | } |
72 | } |
69 | 73 | ||
70 | /** |
74 | /** |
- | 75 | * |
|
71 | * @return nonzero, if buffer is not empty. |
76 | * @return nonzero, if buffer is not empty. |
- | 77 | * |
|
72 | */ |
78 | */ |
73 | int keybuffer_empty(keybuffer_t *keybuffer) |
79 | bool keybuffer_empty(keybuffer_t *keybuffer) |
74 | { |
80 | { |
75 | return (keybuffer->items == 0); |
81 | return (keybuffer->items == 0); |
76 | } |
82 | } |
77 | 83 | ||
78 | /** Push key event to key buffer. |
84 | /** Push key event to key buffer. |
79 | * |
85 | * |
80 | * If the buffer is full, the event is ignored. |
86 | * If the buffer is full, the event is ignored. |
81 | * |
87 | * |
82 | * @param keybuffer The keybuffer. |
88 | * @param keybuffer The keybuffer. |
83 | * @param ev The event to push. |
89 | * @param ev The event to push. |
- | 90 | * |
|
84 | */ |
91 | */ |
85 | void keybuffer_push(keybuffer_t *keybuffer, const kbd_event_t *ev) |
92 | void keybuffer_push(keybuffer_t *keybuffer, const console_event_t *ev) |
86 | { |
93 | { |
87 | futex_down(&keybuffer_futex); |
94 | futex_down(&keybuffer_futex); |
- | 95 | ||
88 | if (keybuffer->items < KEYBUFFER_SIZE) { |
96 | if (keybuffer->items < KEYBUFFER_SIZE) { |
89 | keybuffer->fifo[keybuffer->tail] = *ev; |
97 | keybuffer->fifo[keybuffer->tail] = *ev; |
90 | keybuffer->tail = (keybuffer->tail + 1) % KEYBUFFER_SIZE; |
98 | keybuffer->tail = (keybuffer->tail + 1) % KEYBUFFER_SIZE; |
91 | keybuffer->items++; |
99 | keybuffer->items++; |
92 | } |
100 | } |
- | 101 | ||
93 | futex_up(&keybuffer_futex); |
102 | futex_up(&keybuffer_futex); |
94 | } |
103 | } |
95 | 104 | ||
96 | /** Pop event from buffer. |
105 | /** Pop event from buffer. |
97 | * |
106 | * |
98 | * @param edst Pointer to where the event should be saved. |
107 | * @param edst Pointer to where the event should be saved. |
- | 108 | * |
|
99 | * @return Zero on empty buffer, nonzero otherwise. |
109 | * @return True if an event was popped. |
- | 110 | * |
|
100 | */ |
111 | */ |
101 | int keybuffer_pop(keybuffer_t *keybuffer, kbd_event_t *edst) |
112 | bool keybuffer_pop(keybuffer_t *keybuffer, console_event_t *edst) |
102 | { |
113 | { |
103 | futex_down(&keybuffer_futex); |
114 | futex_down(&keybuffer_futex); |
- | 115 | ||
104 | if (keybuffer->items > 0) { |
116 | if (keybuffer->items > 0) { |
105 | keybuffer->items--; |
117 | keybuffer->items--; |
106 | *edst = (keybuffer->fifo[keybuffer->head]) ; |
118 | *edst = (keybuffer->fifo[keybuffer->head]); |
107 | keybuffer->head = (keybuffer->head + 1) % KEYBUFFER_SIZE; |
119 | keybuffer->head = (keybuffer->head + 1) % KEYBUFFER_SIZE; |
108 | futex_up(&keybuffer_futex); |
120 | futex_up(&keybuffer_futex); |
- | 121 | ||
109 | return 1; |
122 | return true; |
110 | } |
123 | } |
- | 124 | ||
111 | futex_up(&keybuffer_futex); |
125 | futex_up(&keybuffer_futex); |
- | 126 | ||
112 | return 0; |
127 | return false; |
113 | } |
128 | } |
114 | 129 | ||
115 | /** |
130 | /** |
116 | * @} |
131 | * @} |
117 | */ |
132 | */ |