=pod=head1 NAMEERR_set_mark, ERR_pop_to_mark - set marks and pop errors until mark=head1 SYNOPSIS #include <openssl/err.h> int ERR_set_mark(void); int ERR_pop_to_mark(void);=head1 DESCRIPTIONERR_set_mark() sets a mark on the current topmost error record if thereis one.ERR_pop_to_mark() will pop the top of the error stack until a mark is found.The mark is then removed. If there is no mark, the whole stack is removed.=head1 RETURN VALUESERR_set_mark() returns 0 if the error stack is empty, otherwise 1.ERR_pop_to_mark() returns 0 if there was no mark in the error stack, whichimplies that the stack became empty, otherwise 1.=head1 SEE ALSO