diff options
Diffstat (limited to 'packages/qte/qte-4.0.0-snapshot/switches.h')
-rw-r--r-- | packages/qte/qte-4.0.0-snapshot/switches.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/packages/qte/qte-4.0.0-snapshot/switches.h b/packages/qte/qte-4.0.0-snapshot/switches.h index e69de29bb2..37516b4c75 100644 --- a/packages/qte/qte-4.0.0-snapshot/switches.h +++ b/packages/qte/qte-4.0.0-snapshot/switches.h @@ -0,0 +1,74 @@ +/* + * linux/include/linux/switches.h + * + * Copyright (C) 2000 John Dorsey + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 23 October 2000 - created. + */ + +#if !defined(_LINUX_SWITCHES_H) +#define _LINUX_SWITCHES_H + +#define SWITCHES_MASK_SIZE (128) + +typedef unsigned long switches_bitfield; + +#define SWITCHES_BITS (sizeof(switches_bitfield) * 8) +#define SWITCHES_NUM_FIELDS (SWITCHES_MASK_SIZE / SWITCHES_BITS) +#define SWITCHES_FIELD_SELECT(i) ((i) / SWITCHES_BITS) +#define SWITCHES_FIELD_MASK(i) ((switches_bitfield)(1 << (i) % \ + SWITCHES_BITS)) + +typedef struct switches_mask_t { + unsigned int count; + switches_bitfield events[SWITCHES_NUM_FIELDS]; + switches_bitfield states[SWITCHES_NUM_FIELDS]; +} switches_mask_t; + +#define SWITCHES_ZERO(m) \ +do { \ + unsigned int sz_i; \ + (m)->count = 0; \ + for(sz_i = 0; sz_i < SWITCHES_NUM_FIELDS; ++sz_i) \ + (m)->events[sz_i] = (m)->states[sz_i] = 0; \ +} while (0) + +/* `s' is the state of the switch, either 0 or non-zero: */ +#define SWITCHES_SET(m, i, s) \ +do { \ + ((m)->events[SWITCHES_FIELD_SELECT((i))] |= \ + SWITCHES_FIELD_MASK((i))); \ + if(s) \ + ((m)->states[SWITCHES_FIELD_SELECT((i))] |= \ + SWITCHES_FIELD_MASK((i))); \ + else \ + ((m)->states[SWITCHES_FIELD_SELECT((i))] &= \ + ~SWITCHES_FIELD_MASK((i))); \ + ++((m)->count); \ +} while (0) + +/* Should only use to clear an event set by SWITCHES_SET(): */ +#define SWITCHES_CLEAR(m, i) \ +do { \ + ((m)->events[SWITCHES_FIELD_SELECT((i))] &= \ + ~SWITCHES_FIELD_MASK((i))); \ + ((m)->states[SWITCHES_FIELD_SELECT((i))] &= \ + ~SWITCHES_FIELD_MASK((i))); \ + --((m)->count); \ +} + +#define SWITCHES_COUNT(m) ((m)->count) + +/* Returns 0 or non-zero: */ +#define SWITCHES_EVENT(m, i) \ +((m)->events[SWITCHES_FIELD_SELECT((i))] & SWITCHES_FIELD_MASK((i))) + +/* Returns 0 or non-zero: */ +#define SWITCHES_STATE(m, i) \ +((m)->states[SWITCHES_FIELD_SELECT((i))] & SWITCHES_FIELD_MASK((i))) + +#endif /* !defined(_LINUX_SWITCHES_H) */ |