Subversion Repositories HelenOS

Rev

Rev 4236 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 4236 Rev 4462
Line 25... Line 25...
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 
 
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 
 */