ERR_set_mark, ERR_clear_last_mark, ERR_pop_to_mark - set mark, clear mark and pop errors until mark
#include <openssl/err.h>
int ERR_set_mark(void);
int ERR_pop_to_mark(void);
int ERR_clear_last_mark(void);ERR_set_mark() sets a mark on the current topmost error record if there is 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.
ERR_clear_last_mark() removes the last mark added if there is one.
ERR_set_mark() returns 0 if the error stack is empty, otherwise 1.
ERR_clear_last_mark() and ERR_pop_to_mark() return 0 if there was no mark in the error stack, which implies that the stack became empty, otherwise 1.
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Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at https://www.openssl.org/source/license.html.