POSIX_SIGNAL_JUMP

POSIX Signal Jump option group. More...

Data Structures
struct	__sigjmp_buf
	Jump buffer for sigsetjmp() and siglongjmp() More...

Typedefs
typedef struct __sigjmp_buf	sigjmp_buf[1]
	Jump buffer for sigsetjmp() and siglongjmp()

Functions
int	sigsetjmp (sigjmp_buf env, int savemask)
	Save the calling environment and, optionally, the signal mask.
FUNC_NORETURN void	siglongjmp (sigjmp_buf env, int val)
	Restore the environment saved by sigsetjmp().

Detailed Description

POSIX Signal Jump option group.

Typedef Documentation

sigjmp_buf

typedef struct __sigjmp_buf sigjmp_buf[1]

Jump buffer for sigsetjmp() and siglongjmp()

Holds the saved calling environment and, when requested, the saved signal mask.

Function Documentation

siglongjmp()

FUNC_NORETURN void siglongjmp	(	sigjmp_buf	env,
		int	val
	)

Restore the environment saved by sigsetjmp().

Control returns from the corresponding sigsetjmp() invocation with return value val (or 1 when val is 0). When the environment was saved with a non-zero savemask, the saved signal mask is restored first.

Parameters

env	Buffer holding the environment saved by sigsetjmp()
val	Value for the corresponding sigsetjmp() invocation to return

See also

siglongjmp

sigsetjmp()

int sigsetjmp	(	sigjmp_buf	env,
		int	savemask
	)

Save the calling environment and, optionally, the signal mask.

When savemask is non-zero, the calling thread's signal mask is saved in env and siglongjmp() restores it. sigsetjmp() is a macro, as permitted by POSIX, so that the environment is saved in the caller's stack frame.

Parameters

env	Buffer in which the calling environment is saved
savemask	Save the signal mask in env when non-zero

Return values

0	when returning directly from the sigsetjmp() invocation
non-zero	when returning via siglongjmp()

See also

sigsetjmp