I come funtcions, eg sem-open, the docs say that the function returns a
pointer, or else -1.
How can I check for thsi error condition??
eg
sem_t* sem_ptr;
sem_prt = sem_open(…)
if(sem_prt == -1)
{
/Error/
}
doesn’t work as I am comparing a pointer with an integer.
Cheers
Liam <liam.mcdermott@nuigalway.ie> wrote:
I come funtcions, eg sem-open, the docs say that the function returns a
pointer, or else -1.How can I check for thsi error condition??
if( sem_ptr == (sem_t )-1 ) {
/ … */
}
or…
if( sem_ptr == SEM_FAILED ) {
/* … */
}
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Software Engineer, QSSL – Lewis Carroll –
http://qnx.wox.org/