4 * @copyright Copyright (C) 2016 Sproute Networks, Inc.
6 * @author Avneesh Sachdev <avneesh@sproute.com>
8 * This file is part of Quagga.
10 * Quagga is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2, or (at your option) any
15 * Quagga is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License along
21 * with this program; see the file COPYING; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
26 * Header file for Quagga/FRR protobuf memory management code.
29 #ifndef _QPB_ALLOCATOR_H_
30 #define _QPB_ALLOCATOR_H_
32 #include <google/protobuf-c/protobuf-c.h>
34 struct linear_allocator_t_
;
37 * Alias for ProtobufCAllocator that is easier on the fingers.
39 typedef ProtobufCAllocator qpb_allocator_t
;
44 static inline void *qpb_alloc(qpb_allocator_t
*allocator
, size_t size
)
46 return allocator
->alloc(allocator
->allocator_data
, size
);
52 * Allocate space for the specified number of pointers.
54 static inline void *qpb_alloc_ptr_array(qpb_allocator_t
*allocator
,
57 return qpb_alloc(allocator
, num_ptrs
* sizeof(void *));
63 static inline void qpb_free(qpb_allocator_t
*allocator
, void *ptr
)
65 allocator
->free(allocator
->allocator_data
, ptr
);
71 * Convenience macro to reduce the probability of allocating memory of
72 * incorrect size. It returns enough memory to store the given type,
73 * and evaluates to an appropriately typed pointer.
75 #define QPB_ALLOC(allocator, type) (type *)qpb_alloc(allocator, sizeof(type))
80 extern void qpb_allocator_init_linear(qpb_allocator_t
*,
81 struct linear_allocator_t_
*);
84 * The following macros are for the common case where a qpb allocator
85 * is being used alongside a linear allocator that allocates memory
88 #define QPB_DECLARE_STACK_ALLOCATOR(allocator, size) \
89 qpb_allocator_t allocator; \
90 linear_allocator_t lin_##allocator; \
91 char lin_##allocator##_buf[size]
93 #define QPB_INIT_STACK_ALLOCATOR(allocator) \
95 linear_allocator_init(&(lin_##allocator), \
96 lin_##allocator##_buf, \
97 sizeof(lin_##allocator##_buf)); \
98 qpb_allocator_init_linear(&allocator, &(lin_##allocator)); \
101 #define QPB_RESET_STACK_ALLOCATOR(allocator) \
103 linear_allocator_reset(&(lin_##allocator)); \
106 #endif /* _QPB_ALLOCATOR_H_ */