init

unitree_SDK/include/dds/ddsi/q_freelist.h

@@ -0,0 +1,91 @@
+/*
+ * Copyright(c) 2006 to 2020 ZettaScale Technology and others
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0, or the Eclipse Distribution License
+ * v. 1.0 which is available at
+ * http://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
+ */
+#ifndef NN_FREELIST_H
+#define NN_FREELIST_H
+
+#include "dds/ddsrt/atomics.h"
+#include "dds/ddsrt/sync.h"
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+#define FREELIST_NONE 1
+#define FREELIST_ATOMIC_LIFO 2
+#define FREELIST_DOUBLE 3
+
+#define FREELIST_TYPE FREELIST_DOUBLE
+
+#ifndef FREELIST_TYPE
+#if DDSRT_HAVE_ATOMIC_LIFO
+#define FREELIST_TYPE FREELIST_ATOMIC_LIFO
+#else
+#define FREELIST_TYPE FREELIST_DOUBLE
+#endif
+#endif
+
+#if FREELIST_TYPE == FREELIST_NONE
+
+struct nn_freelist {
+  char dummy;
+};
+
+#elif FREELIST_TYPE == FREELIST_ATOMIC_LIFO
+
+struct nn_freelist {
+  ddsrt_atomic_lifo_t x;
+  ddsrt_atomic_uint32_t count;
+  uint32_t max;
+  size_t linkoff;
+};
+
+#elif FREELIST_TYPE == FREELIST_DOUBLE
+
+#define NN_FREELIST_NPAR 4
+#define NN_FREELIST_NPAR_LG2 2
+#define NN_FREELIST_MAGSIZE 256
+
+struct nn_freelistM {
+  void *x[NN_FREELIST_MAGSIZE];
+  void *next;
+};
+
+struct nn_freelist1 {
+  ddsrt_mutex_t lock;
+  uint32_t count;
+  struct nn_freelistM *m;
+};
+
+struct nn_freelist {
+  struct nn_freelist1 inner[NN_FREELIST_NPAR];
+  ddsrt_atomic_uint32_t cc;
+  ddsrt_mutex_t lock;
+  struct nn_freelistM *mlist;
+  struct nn_freelistM *emlist;
+  uint32_t count;
+  uint32_t max;
+  size_t linkoff;
+};
+
+#endif
+
+void nn_freelist_init (struct nn_freelist *fl, uint32_t max, size_t linkoff);
+void nn_freelist_fini (struct nn_freelist *fl, void (*free) (void *elem));
+bool nn_freelist_push (struct nn_freelist *fl, void *elem);
+void *nn_freelist_pushmany (struct nn_freelist *fl, void *first, void *last, uint32_t n);
+void *nn_freelist_pop (struct nn_freelist *fl);
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif /* NN_FREELIST_H */