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#include <sys/feature_tests.h>
#include <sys/signal.h>
/*
typedef struct {
unsigned long __sigbits[4];
} sigset_t;
*/
typedef int sig_atomic_t;
#define sigmask(n) ((unsigned int)1 << (((n) - 1) & (32 - 1)))
#define sigword(n) (((unsigned int)((n) - 1))>>5)
#define __SIGEMPTYSET { 0, 0, 0, 0 };
#define __SIGFILLSET { 0xffffffff,0xffffffff,0xffffffff,0xffffffff };
#define __SIGADDSET(s, n) ((s)->__sigbits[sigword(n)] |= sigmask(n))
#define __SIGDELSET(s, n) ((s)->__sigbits[sigword(n)] &= ~sigmask(n))
#define __SIGISMEMBER(s, n) (sigmask(n) & (s)->__sigbits[sigword(n)])
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