Root/liballegro/patches/060-fix-keyboard-drv.patch

1Index: allegro-4.4.2/src/linux/lkeybd.c
2===================================================================
3--- allegro-4.4.2.orig/src/linux/lkeybd.c 2011-06-19 11:32:20.000000000 +0200
4+++ allegro-4.4.2/src/linux/lkeybd.c 2012-03-29 03:58:32.357827856 +0200
5@@ -143,7 +143,10 @@
6 /* convert Allegro format scancodes into key_shifts flag bits */
7 static unsigned short modifier_table[__allegro_KEY_MAX - __allegro_KEY_MODIFIERS] =
8 {
9- __allegro_KB_SHIFT_FLAG, __allegro_KB_SHIFT_FLAG, __allegro_KB_CTRL_FLAG,
10+ __allegro_KB_SHIFT_FLAG, __allegro_KB_SHIFT_FLAG,
11+ /* note: we drop LCONTROL here, as the NanoNote uses it as modifier key
12+ 'Fn', passing it as CTRL causes problems with ASE's key bindings */
13+ /*__allegro_KB_CTRL_FLAG*/ 0,
14    __allegro_KB_CTRL_FLAG, __allegro_KB_ALT_FLAG, __allegro_KB_ALT_FLAG,
15    __allegro_KB_LWIN_FLAG, __allegro_KB_RWIN_FLAG, __allegro_KB_MENU_FLAG,
16    __allegro_KB_SCROLOCK_FLAG, __allegro_KB_NUMLOCK_FLAG, __allegro_KB_CAPSLOCK_FLAG
17@@ -204,7 +207,10 @@
18                 map = 0;
19                 if (key[__allegro_KEY_LSHIFT] || key[__allegro_KEY_RSHIFT]) map |= 1;
20                 if (key[__allegro_KEY_ALTGR]) map |= 2;
21- if (key[__allegro_KEY_LCONTROL] || key[__allegro_KEY_RCONTROL]) map |= 4;
22+
23+ /* fixes for nanonote's keyboard: LCONTROL is 'Fn' modifier */
24+ if (key[__allegro_KEY_LCONTROL]) map |= (1<<6);
25+ if (key[__allegro_KEY_RCONTROL]) map |= 4;
26                 if (key[__allegro_KEY_ALT]) map |= 8;
27 
28                 /* Map scancode to type and value */
29@@ -304,6 +310,7 @@
30 {
31    unsigned char buf[128];
32    int bytes_read;
33+ int avail;
34    fd_set set;
35    struct timeval tv = { 0, 0 };
36 
37@@ -312,12 +319,26 @@
38 
39    FD_ZERO(&set);
40    FD_SET(std_keyboard.fd, &set);
41- if (select (FD_SETSIZE, &set, NULL, NULL, &tv) <= 0)
42- return 0;
43 
44- bytes_read = read(std_keyboard.fd, &buf, sizeof(buf));
45- if (bytes_read < 1)
46- return 0;
47+ /* Possible heisenbug here. when doing readkey(), the main thread does
48+ select with timeout and causes us EINTR here. One lost select() an we
49+ already hit that "select() is not fully level triggered" lost-wakeup
50+ deadlock!? Also note EINTR problem with read() below. */
51+
52+ do
53+ {
54+ avail = select (FD_SETSIZE, &set, NULL, NULL, &tv);
55+ if ((avail < 0 && errno != EINTR) || avail == 0)
56+ {
57+ return 0;
58+ }
59+ } while (avail < 0);
60+
61+ do {
62+ bytes_read = read(std_keyboard.fd, &buf, sizeof(buf));
63+ if ((bytes_read < 1 && errno != EINTR) || bytes_read == 0)
64+ return 0;
65+ } while (bytes_read < 0);
66 
67    process_keyboard_data(buf, bytes_read);
68 
69Index: allegro-4.4.2/src/keyboard.c
70===================================================================
71--- allegro-4.4.2.orig/src/keyboard.c 2012-03-29 02:21:50.328523081 +0200
72+++ allegro-4.4.2/src/keyboard.c 2012-03-29 02:22:58.768808442 +0200
73@@ -625,6 +625,11 @@
74    _DRIVER_INFO *driver_list;
75    int i;
76 
77+ /* readkey() uses rest(1) which deadlocks unless we call install_timer()
78+ first. this bug occurs e.g. with exhello (but not with any of the
79+ event-loop driven allegro games) */
80+ install_timer();
81+
82    if (keyboard_driver)
83       return 0;
84 
85

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