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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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