100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
// Copyright(c) 2006 to 2020 ZettaScale Technology and others
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//
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// This program and the accompanying materials are made available under the
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// terms of the Eclipse Public License v. 2.0 which is available at
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// http://www.eclipse.org/legal/epl-2.0, or the Eclipse Distribution License
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// v. 1.0 which is available at
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// http://www.eclipse.org/org/documents/edl-v10.php.
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//
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// SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
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#ifndef DDSI_FREELIST_H
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#define DDSI_FREELIST_H
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#include "dds/ddsrt/atomics.h"
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#include "dds/ddsrt/sync.h"
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#if defined (__cplusplus)
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extern "C" {
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#endif
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#define DDSI_FREELIST_NONE 1
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#define DDSI_FREELIST_ATOMIC_LIFO 2
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#define DDSI_FREELIST_DOUBLE 3
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#define DDSI_FREELIST_TYPE DDSI_FREELIST_DOUBLE
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#ifndef DDSI_FREELIST_TYPE
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#if DDSRT_HAVE_ATOMIC_LIFO
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#define DDSI_FREELIST_TYPE DDSI_FREELIST_ATOMIC_LIFO
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#else
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#define DDSI_FREELIST_TYPE DDSI_FREELIST_DOUBLE
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#endif
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#endif
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#if DDSI_FREELIST_TYPE == DDSI_FREELIST_NONE
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struct ddsi_freelist {
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char dummy;
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};
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#elif DDSI_FREELIST_TYPE == DDSI_FREELIST_ATOMIC_LIFO
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struct ddsi_freelist {
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ddsrt_atomic_lifo_t x;
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ddsrt_atomic_uint32_t count;
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uint32_t max;
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size_t linkoff;
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};
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#elif DDSI_FREELIST_TYPE == DDSI_FREELIST_DOUBLE
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#define NN_FREELIST_NPAR 4
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#define NN_FREELIST_NPAR_LG2 2
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#define NN_FREELIST_MAGSIZE 256
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struct ddsi_freelist_m {
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void *x[NN_FREELIST_MAGSIZE];
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void *next;
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};
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struct ddsi_freelist1 {
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ddsrt_mutex_t lock;
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uint32_t count;
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struct ddsi_freelist_m *m;
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};
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struct ddsi_freelist {
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struct ddsi_freelist1 inner[NN_FREELIST_NPAR];
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ddsrt_atomic_uint32_t cc;
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ddsrt_mutex_t lock;
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struct ddsi_freelist_m *mlist;
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struct ddsi_freelist_m *emlist;
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uint32_t count;
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uint32_t max;
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size_t linkoff;
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};
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#endif
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/** @component ddsi_freelist */
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void ddsi_freelist_init (struct ddsi_freelist *fl, uint32_t max, size_t linkoff);
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/** @component ddsi_freelist */
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void ddsi_freelist_fini (struct ddsi_freelist *fl, void (*free) (void *elem));
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/** @component ddsi_freelist */
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bool ddsi_freelist_push (struct ddsi_freelist *fl, void *elem);
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/** @component ddsi_freelist */
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void *ddsi_freelist_pushmany (struct ddsi_freelist *fl, void *first, void *last, uint32_t n);
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/** @component ddsi_freelist */
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void *ddsi_freelist_pop (struct ddsi_freelist *fl);
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#if defined (__cplusplus)
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}
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#endif
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#endif /* DDSI_FREELIST_H */
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