include/linux/signal.h
17123 #ifndef _LINUX_SIGNAL_H
17124 #define _LINUX_SIGNAL_H
17125
17126 #include <asm/signal.h>
17127 #include <asm/siginfo.h>
17128
17129 #ifdef __KERNEL__
17130 /* Real Time signals may be queued. */
17131
17132 struct signal_queue
17133 {
17134 struct signal_queue *next;
17135 siginfo_t info;
17136 };
17137
17138 /* Define some primitives to manipulate sigset_t. */
17139
17140 #ifndef __HAVE_ARCH_SIG_BITOPS
17141 #include <asm/bitops.h>
17142
17143 /* We don't use <asm/bitops.h> for these because there is
17144 * no need to be atomic. */
17145 extern inline void sigaddset(sigset_t *set, int _sig)
17146 {
17147 unsigned long sig = _sig - 1;
17148 if (_NSIG_WORDS == 1)
17149 set->sig[0] |= 1UL << sig;
17150 else
17151 set->sig[sig/_NSIG_BPW] |= 1UL << (sig % _NSIG_BPW);
17152 }
17153
17154 extern inline void sigdelset(sigset_t *set, int _sig)
17155 {
17156 unsigned long sig = _sig - 1;
17157 if (_NSIG_WORDS == 1)
17158 set->sig[0] &= ~(1UL << sig);
17159 else
17160 set->sig[sig/_NSIG_BPW] &= ~(1UL << (sig%_NSIG_BPW));
17161 }
17162
17163 extern inline int sigismember(sigset_t *set, int _sig)
17164 {
17165 unsigned long sig = _sig - 1;
17166 if (_NSIG_WORDS == 1)
17167 return 1 & (set->sig[0] >> sig);
17168 else
17169 return 1 & (set->sig[sig/_NSIG_BPW]>>(sig%_NSIG_BPW));
17170 }
17171
17172 extern inline int sigfindinword(unsigned long word)
17173 {
17174 return ffz(~word);
17175 }
17176
17177 #define sigmask(sig) (1UL << ((sig) - 1))
17178
17179 #endif /* __HAVE_ARCH_SIG_BITOPS */
17180
17181 #ifndef __HAVE_ARCH_SIG_SETOPS
17182 #include <linux/string.h>
17183
17184 #define _SIG_SET_BINOP(name, op) \
17185 extern inline void name(sigset_t *r, const sigset_t *a, \
17186 const sigset_t *b) \
17187 { \
17188 unsigned long a0, a1, a2, a3, b0, b1, b2, b3; \
17189 unsigned long i; \
17190 \
17191 for (i = 0; i < _NSIG_WORDS/4; ++i) { \
17192 a0 = a->sig[4*i+0]; a1 = a->sig[4*i+1]; \
17193 a2 = a->sig[4*i+2]; a3 = a->sig[4*i+3]; \
17194 b0 = b->sig[4*i+0]; b1 = b->sig[4*i+1]; \
17195 b2 = b->sig[4*i+2]; b3 = b->sig[4*i+3]; \
17196 r->sig[4*i+0] = op(a0, b0); \
17197 r->sig[4*i+1] = op(a1, b1); \
17198 r->sig[4*i+2] = op(a2, b2); \
17199 r->sig[4*i+3] = op(a3, b3); \
17200 } \
17201 switch (_NSIG_WORDS % 4) { \
17202 case 3: \
17203 a0 = a->sig[4*i+0]; a1 = a->sig[4*i+1]; \
17204 a2 = a->sig[4*i+2]; \
17205 b0 = b->sig[4*i+0]; b1 = b->sig[4*i+1]; \
17206 b2 = b->sig[4*i+2]; \
17207 r->sig[4*i+0] = op(a0, b0); \
17208 r->sig[4*i+1] = op(a1, b1); \
17209 r->sig[4*i+2] = op(a2, b2); \
17210 break; \
17211 case 2: \
17212 a0 = a->sig[4*i+0]; a1 = a->sig[4*i+1]; \
17213 b0 = b->sig[4*i+0]; b1 = b->sig[4*i+1]; \
17214 r->sig[4*i+0] = op(a0, b0); \
17215 r->sig[4*i+1] = op(a1, b1); \
17216 break; \
17217 case 1: \
17218 a0 = a->sig[4*i+0]; b0 = b->sig[4*i+0]; \
17219 r->sig[4*i+0] = op(a0, b0); \
17220 break; \
17221 }
17222 }
17223
17224 #define _sig_or(x,y) ((x) | (y))
17225 _SIG_SET_BINOP(sigorsets, _sig_or)
17226
17227 #define _sig_and(x,y) ((x) & (y))
17228 _SIG_SET_BINOP(sigandsets, _sig_and)
17229
17230 #define _sig_nand(x,y) ((x) & ~(y))
17231 _SIG_SET_BINOP(signandsets, _sig_nand)
17232
17233 #undef _SIG_SET_BINOP
17234 #undef _sig_or
17235 #undef _sig_and
17236 #undef _sig_nand
17237
17238 #define _SIG_SET_OP(name, op) \
17239 extern inline void name(sigset_t *set) \
17240 { \
17241 unsigned long i; \
17242 \
17243 for (i = 0; i < _NSIG_WORDS/4; ++i) { \
17244 set->sig[4*i+0] = op(set->sig[4*i+0]); \
17245 set->sig[4*i+1] = op(set->sig[4*i+1]); \
17246 set->sig[4*i+2] = op(set->sig[4*i+2]); \
17247 set->sig[4*i+3] = op(set->sig[4*i+3]); \
17248 } \
17249 switch (_NSIG_WORDS % 4) { \
17250 case 3: set->sig[4*i+2] = op(set->sig[4*i+2]); \
17251 case 2: set->sig[4*i+1] = op(set->sig[4*i+1]); \
17252 case 1: set->sig[4*i+0] = op(set->sig[4*i+0]); \
17253 }
17254 }
17255
17256 #define _sig_not(x) (~(x))
17257 _SIG_SET_OP(signotset, _sig_not)
17258
17259 #undef _SIG_SET_OP
17260 #undef _sig_not
17261
17262 extern inline void sigemptyset(sigset_t *set)
17263 {
17264 switch (_NSIG_WORDS) {
17265 default:
17266 memset(set, 0, sizeof(sigset_t));
17267 break;
17268 case 2: set->sig[1] = 0;
17269 case 1: set->sig[0] = 0;
17270 break;
17271 }
17272 }
17273
17274 extern inline void sigfillset(sigset_t *set)
17275 {
17276 switch (_NSIG_WORDS) {
17277 default:
17278 memset(set, -1, sizeof(sigset_t));
17279 break;
17280 case 2: set->sig[1] = -1;
17281 case 1: set->sig[0] = -1;
17282 break;
17283 }
17284 }
17285
17286 extern char * render_sigset_t(sigset_t *set,
17287 char *buffer);
17288
17289 /* Some extensions for manipulating the low 32 signals in
17290 particular. */
17291
17292 extern inline void sigaddsetmask(sigset_t *set,
17293 unsigned long mask)
17294 {
17295 set->sig[0] |= mask;
17296 }
17297
17298 extern inline void sigdelsetmask(sigset_t *set,
17299 unsigned long mask)
17300 {
17301 set->sig[0] &= ~mask;
17302 }
17303
17304 extern inline int sigtestsetmask(sigset_t *set,
17305 unsigned long mask)
17306 {
17307 return (set->sig[0] & mask) != 0;
17308 }
17309
17310 extern inline void siginitset(sigset_t *set,
17311 unsigned long mask)
17312 {
17313 set->sig[0] = mask;
17314 switch (_NSIG_WORDS) {
17315 default:
17316 memset(&set->sig[1], 0,sizeof(long)*(_NSIG_WORDS-1));
17317 break;
17318 case 2: set->sig[1] = 0;
17319 case 1:
17320 }
17321 }
17322
17323 extern inline void siginitsetinv(sigset_t *set,
17324 unsigned long mask)
17325 {
17326 set->sig[0] = ~mask;
17327 switch (_NSIG_WORDS) {
17328 default:
17329 memset(&set->sig[1],-1,sizeof(long)*(_NSIG_WORDS-1));
17330 break;
17331 case 2: set->sig[1] = -1;
17332 case 1:
17333 }
17334 }
17335
17336 #endif /* __HAVE_ARCH_SIG_SETOPS */
17337
17338 #endif /* __KERNEL__ */
17339
17340 #endif /* _LINUX_SIGNAL_H */
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