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#ifndef _UCONTEXT_H
#define _UCONTEXT_H
#ifdef __cplusplus
extern "C" {
#endif
#include <features.h>
#include <signal.h>
#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#define NGREG (sizeof(gregset_t)/sizeof(greg_t))
#endif
struct __ucontext;
int getcontext(struct __ucontext *);
void makecontext(struct __ucontext *, void (*)(), int, ...);
int setcontext(const struct __ucontext *);
int swapcontext(struct __ucontext *, const struct __ucontext *);
#ifdef __cplusplus
}
#endif
#endif
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