From f69cb8296624e8e2c495001ab0c7d38839ad9704 Mon Sep 17 00:00:00 2001 From: Curtis McEnroe Date: Thu, 24 Oct 2019 00:44:21 -0400 Subject: Implement ringWrite --- ring.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 ring.c (limited to 'ring.c') diff --git a/ring.c b/ring.c new file mode 100644 index 0000000..40fb7df --- /dev/null +++ b/ring.c @@ -0,0 +1,40 @@ +/* Copyright (C) 2019 C. McEnroe + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include +#include + +#include "bounce.h" + +enum { RingLen = 4096 }; +static_assert(!(RingLen & (RingLen - 1)), "power of two RingLen"); + +static struct { + char *lines[RingLen]; + time_t times[RingLen]; + size_t write; +} ring; + +void ringWrite(const char *line) { + size_t i = ring.write++ % RingLen; + if (ring.lines[i]) free(ring.lines[i]); + ring.times[i] = time(NULL); + ring.lines[i] = strdup(line); + if (!ring.lines[i]) err(EX_OSERR, "strdup"); +} -- cgit 1.4.1