diff options
Diffstat (limited to 'uisimulator/x11/kernel.c')
-rw-r--r-- | uisimulator/x11/kernel.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/uisimulator/x11/kernel.c b/uisimulator/x11/kernel.c new file mode 100644 index 0000000000..7405fec52f --- /dev/null +++ b/uisimulator/x11/kernel.c | |||
@@ -0,0 +1,108 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2005 by Jens Arnold | ||
11 | * | ||
12 | * All files in this archive are subject to the GNU General Public License. | ||
13 | * See the file COPYING in the source tree root for full license agreement. | ||
14 | * | ||
15 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
16 | * KIND, either express or implied. | ||
17 | * | ||
18 | ****************************************************************************/ | ||
19 | |||
20 | #include "kernel.h" | ||
21 | #include "thread.h" | ||
22 | |||
23 | int set_irq_level (int level) | ||
24 | { | ||
25 | static int _lv = 0; | ||
26 | return (_lv = level); | ||
27 | } | ||
28 | |||
29 | void queue_init(struct event_queue *q) | ||
30 | { | ||
31 | q->read = 0; | ||
32 | q->write = 0; | ||
33 | } | ||
34 | |||
35 | void queue_wait(struct event_queue *q, struct event *ev) | ||
36 | { | ||
37 | while(q->read == q->write) | ||
38 | { | ||
39 | switch_thread(); | ||
40 | } | ||
41 | |||
42 | *ev = q->events[(q->read++) & QUEUE_LENGTH_MASK]; | ||
43 | } | ||
44 | |||
45 | void queue_wait_w_tmo(struct event_queue *q, struct event *ev, int ticks) | ||
46 | { | ||
47 | unsigned int timeout = current_tick + ticks; | ||
48 | |||
49 | while(q->read == q->write && TIME_BEFORE( current_tick, timeout )) | ||
50 | { | ||
51 | sleep(1); | ||
52 | } | ||
53 | |||
54 | if(q->read != q->write) | ||
55 | { | ||
56 | *ev = q->events[(q->read++) & QUEUE_LENGTH_MASK]; | ||
57 | } | ||
58 | else | ||
59 | { | ||
60 | ev->id = SYS_TIMEOUT; | ||
61 | } | ||
62 | } | ||
63 | |||
64 | void queue_post(struct event_queue *q, long id, void *data) | ||
65 | { | ||
66 | int wr; | ||
67 | int oldlevel; | ||
68 | |||
69 | oldlevel = set_irq_level(15<<4); | ||
70 | wr = (q->write++) & QUEUE_LENGTH_MASK; | ||
71 | |||
72 | q->events[wr].id = id; | ||
73 | q->events[wr].data = data; | ||
74 | set_irq_level(oldlevel); | ||
75 | } | ||
76 | |||
77 | bool queue_empty(const struct event_queue* q) | ||
78 | { | ||
79 | return ( q->read == q->write ); | ||
80 | } | ||
81 | |||
82 | void queue_clear(struct event_queue* q) | ||
83 | { | ||
84 | /* fixme: This is potentially unsafe in case we do interrupt-like processing */ | ||
85 | q->read = 0; | ||
86 | q->write = 0; | ||
87 | } | ||
88 | |||
89 | void switch_thread (void) | ||
90 | { | ||
91 | yield (); | ||
92 | } | ||
93 | |||
94 | void mutex_init(struct mutex *m) | ||
95 | { | ||
96 | (void)m; | ||
97 | } | ||
98 | |||
99 | void mutex_lock(struct mutex *m) | ||
100 | { | ||
101 | (void)m; | ||
102 | } | ||
103 | |||
104 | void mutex_unlock(struct mutex *m) | ||
105 | { | ||
106 | (void)m; | ||
107 | } | ||
108 | |||