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/*
* setjmp.h
*/
#ifndef _SETJMP_H
#define _SETJMP_H
#include <klibc/extern.h>
#include <klibc/compiler.h>
#include <stddef.h>
#include <signal.h>
#include <klibc/archsetjmp.h>
__extern int setjmp(jmp_buf);
__extern __noreturn longjmp(jmp_buf, int);
/*
Whose bright idea was it to add unrelated functionality to just about
the only function in the standard C library (setjmp) which cannot be
wrapped by an ordinary function wrapper? Anyway, the damage is done,
and therefore, this wrapper *must* be inline. However, gcc will
complain if this is an inline function for unknown reason, and
therefore sigsetjmp() needs to be a macro.
*/
struct __sigjmp_buf {
jmp_buf __jmpbuf;
sigset_t __sigs;
unsigned char __sigs_saved;
};
typedef struct __sigjmp_buf sigjmp_buf[1];
#define sigsetjmp(__env, __save) \
({ \
struct __sigjmp_buf *__e = (__env); \
if (__save) { \
sigprocmask(0, NULL, &__e->__sigs); \
__e->__sigs_saved = 1; \
} else \
__e->__sigs_saved = 0; \
setjmp(__e->__jmpbuf); \
})
__extern __noreturn siglongjmp(sigjmp_buf, int);
#endif /* _SETJMP_H */
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