sigsetjmp()
QNX SDP8.0C Library ReferenceAPIDeveloper
Save the environment, including the signal mask
Synopsis:
#include <setjmp.h>
int sigsetjmp( sigjmp_buf env,
int savemask );
Arguments:
- env
- A buffer where the function can save the calling environment.
- savemask
- Nonzero if you want to save the process's current signal mask, otherwise 0.
Library:
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Description:
The sigsetjmp() function behaves in the same way as the setjmp() function when savemask is zero. If savemask is nonzero, then sigsetjmp() also saves the thread's current signal mask as part of the calling environment.
DANGER:
Don't use
longjmp() or
siglongjmp()
to restore an environment saved by a call to
setjmp() or
sigsetjmp() in another thread.
If you're lucky, your application will crash; if not, it'll look as if it
works for a while, until random scribbling on the stack causes it to crash.
Returns:
Zero if invoked directly, or nonzero if the return is the result of a call to siglongjmp().
Examples:
See setjmp().
Classification:
| Safety: | |
|---|---|
| Cancellation point | No |
| Signal handler | Yes |
| Thread | Yes |
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