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authorDamjan Marion <damarion@cisco.com>2016-12-19 23:05:39 +0100
committerDamjan Marion <damarion@cisco.com>2016-12-28 12:25:14 +0100
commit7cd468a3d7dee7d6c92f69a0bb7061ae208ec727 (patch)
tree5de62f8dbd3a752f5a676ca600e43d2652d1ff1a /src/vppinfra/vec_bootstrap.h
parent696f1adec0df3b8f161862566dd9c86174302658 (diff)
Reorganize source tree to use single autotools instance
Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion <damarion@cisco.com>
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+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef included_clib_vec_bootstrap_h
+#define included_clib_vec_bootstrap_h
+
+/** \file
+ Vector bootsrap header file
+*/
+
+/* Bootstrap include so that #include <vppinfra/mem.h> can include e.g.
+ <vppinfra/mheap.h> which depends on <vppinfra/vec.h>. */
+
+/** \brief vector header structure
+
+ Bookeeping header preceding vector elements in memory.
+ User header information may preceed standard vec header.
+ If you change u32 len -> u64 len, single vectors can
+ exceed 2**32 elements. Clib heaps are vectors. */
+
+typedef struct
+{
+#if CLIB_VEC64 > 0
+ u64 len;
+#else
+ u32 len; /**< Number of elements in vector (NOT its allocated length). */
+#endif
+ u8 vector_data[0]; /**< Vector data . */
+} vec_header_t;
+
+/** \brief Find the vector header
+
+ Given the user's pointer to a vector, find the corresponding
+ vector header
+
+ @param v pointer to a vector
+ @return pointer to the vector's vector_header_t
+*/
+#define _vec_find(v) ((vec_header_t *) (v) - 1)
+
+#define _vec_round_size(s) \
+ (((s) + sizeof (uword) - 1) &~ (sizeof (uword) - 1))
+
+always_inline uword
+vec_header_bytes (uword header_bytes)
+{
+ return round_pow2 (header_bytes + sizeof (vec_header_t),
+ sizeof (vec_header_t));
+}
+
+/** \brief Find a user vector header
+
+ Finds the user header of a vector with unspecified alignment given
+ the user pointer to the vector.
+*/
+
+always_inline void *
+vec_header (void *v, uword header_bytes)
+{
+ return v - vec_header_bytes (header_bytes);
+}
+
+/** \brief Find the end of user vector header
+
+ Finds the end of the user header of a vector with unspecified
+ alignment given the user pointer to the vector.
+*/
+
+always_inline void *
+vec_header_end (void *v, uword header_bytes)
+{
+ return v + vec_header_bytes (header_bytes);
+}
+
+always_inline uword
+vec_aligned_header_bytes (uword header_bytes, uword align)
+{
+ return round_pow2 (header_bytes + sizeof (vec_header_t), align);
+}
+
+always_inline void *
+vec_aligned_header (void *v, uword header_bytes, uword align)
+{
+ return v - vec_aligned_header_bytes (header_bytes, align);
+}
+
+always_inline void *
+vec_aligned_header_end (void *v, uword header_bytes, uword align)
+{
+ return v + vec_aligned_header_bytes (header_bytes, align);
+}
+
+
+/** \brief Number of elements in vector (lvalue-capable)
+
+ _vec_len (v) does not check for null, but can be used as a lvalue
+ (e.g. _vec_len (v) = 99).
+*/
+
+#define _vec_len(v) (_vec_find(v)->len)
+
+/** \brief Number of elements in vector (rvalue-only, NULL tolerant)
+
+ vec_len (v) checks for NULL, but cannot be used as an lvalue.
+ If in doubt, use vec_len...
+*/
+
+#define vec_len(v) ((v) ? _vec_len(v) : 0)
+
+/** \brief Reset vector length to zero
+ NULL-pointer tolerant
+*/
+
+#define vec_reset_length(v) do { if (v) _vec_len (v) = 0; } while (0)
+
+/** \brief Number of data bytes in vector. */
+
+#define vec_bytes(v) (vec_len (v) * sizeof (v[0]))
+
+/** \brief Total number of bytes that can fit in vector with current allocation. */
+
+#define vec_capacity(v,b) \
+({ \
+ void * _vec_capacity_v = (void *) (v); \
+ uword _vec_capacity_b = (b); \
+ _vec_capacity_b = sizeof (vec_header_t) + _vec_round_size (_vec_capacity_b); \
+ _vec_capacity_v ? clib_mem_size (_vec_capacity_v - _vec_capacity_b) : 0; \
+})
+
+/** \brief Total number of elements that can fit into vector. */
+#define vec_max_len(v) (vec_capacity(v,0) / sizeof (v[0]))
+
+/** \brief End (last data address) of vector. */
+#define vec_end(v) ((v) + vec_len (v))
+
+/** \brief True if given pointer is within given vector. */
+#define vec_is_member(v,e) ((e) >= (v) && (e) < vec_end (v))
+
+/** \brief Get vector value at index i checking that i is in bounds. */
+#define vec_elt_at_index(v,i) \
+({ \
+ ASSERT ((i) < vec_len (v)); \
+ (v) + (i); \
+})
+
+/** \brief Get vector value at index i */
+#define vec_elt(v,i) (vec_elt_at_index(v,i))[0]
+
+/** \brief Vector iterator */
+#define vec_foreach(var,vec) for (var = (vec); var < vec_end (vec); var++)
+
+/** \brief Vector iterator (reverse) */
+#define vec_foreach_backwards(var,vec) \
+for (var = vec_end (vec) - 1; var >= (vec); var--)
+
+/** \brief Iterate over vector indices. */
+#define vec_foreach_index(var,v) for ((var) = 0; (var) < vec_len (v); (var)++)
+
+#endif /* included_clib_vec_bootstrap_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */