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9e4ead3095
Cast an unified ring + storage area to a ring from area, without reinitializing the data buffer. Reinitialize the waiters and the lock. It helps retrieving a previously allocated ring, from an mmap for example.
52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
/*
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* include/haproxy/ring.h
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* Exported functions for ring buffers used for disposable data.
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*
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* Copyright (C) 2000-2019 Willy Tarreau - w@1wt.eu
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _HAPROXY_RING_H
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#define _HAPROXY_RING_H
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#include <stdlib.h>
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#include <import/ist.h>
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#include <haproxy/ring-t.h>
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struct appctx;
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struct ring *ring_new(size_t size);
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struct ring *ring_make_from_area(void *area, size_t size);
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struct ring *ring_cast_from_area(void *area);
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void ring_init(struct ring *ring, void* area, size_t size);
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struct ring *ring_resize(struct ring *ring, size_t size);
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void ring_free(struct ring *ring);
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ssize_t ring_write(struct ring *ring, size_t maxlen, const struct ist pfx[], size_t npfx, const struct ist msg[], size_t nmsg);
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int ring_attach(struct ring *ring);
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void ring_detach_appctx(struct ring *ring, struct appctx *appctx, size_t ofs);
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int ring_attach_cli(struct ring *ring, struct appctx *appctx, uint flags);
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int cli_io_handler_show_ring(struct appctx *appctx);
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void cli_io_release_show_ring(struct appctx *appctx);
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#endif /* _HAPROXY_RING_H */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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