78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
/*
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Copyright (c) 2013, Matthias Schiffer <mschiffer@universe-factory.net>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "queue.hpp"
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#include "mmss.hpp"
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#include <cstdlib>
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typedef struct mmss_queue_entry mmss_queue_entry_t;
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struct mmss_queue_entry {
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mmss_queue_entry_t *next;
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uint64_t timeout;
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void *data;
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};
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void mmss_queue_put(mmss_t *mmss, mmss_queue_t *queue, void *data, uint64_t timeout) {
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while (*queue && timeout >= (*queue)->timeout)
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queue = &(*queue)->next;
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mmss_queue_entry_t *entry = new mmss_queue_entry_t;
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entry->timeout = timeout;
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entry->data = data;
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entry->next = *queue;
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*queue = entry;
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}
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void* mmss_queue_get(mmss_t *mmss, mmss_queue_t *queue) {
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mmss_queue_entry_t *entry = *queue;
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if (!entry || entry->timeout > mmss->now)
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return NULL;
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*queue = entry->next;
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void *data = entry->data;
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free(entry);
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return data;
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}
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int mmss_queue_timeout(const mmss_t *mmss, const mmss_queue_t *const queue) {
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if (!*queue)
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return -1;
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int diff = (*queue)->timeout - mmss->now;
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if (diff < 0)
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return 0;
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else
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return diff;
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}
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