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Vector Packet Processing
mheap.h
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1 /*
2  * Copyright (c) 2015 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
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14  */
15 /*
16  Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus
17 
18  Permission is hereby granted, free of charge, to any person obtaining
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25 
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36 */
37 
38 #ifndef included_mheap_h
39 #define included_mheap_h
40 
41 #if USE_DLMALLOC == 0
42 
43 #include <vppinfra/vec.h>
44 #include <vppinfra/error.h> /* clib_error_t */
45 #include <vppinfra/mem.h> /* clib_mem_usage_t */
46 #include <vppinfra/format.h> /* for unformat_input_t */
47 
48 /* Allocate size bytes. New heap and offset are returned.
49  offset == ~0 means allocation failed. */
50 always_inline void *
51 mheap_get (void *v, uword size, uword * offset_return)
52 {
53  return mheap_get_aligned (v, size, 0, 0, offset_return);
54 }
55 
56 /* Create allocation heap of given size.
57  * The actual usable size is smaller than the requested size.
58  * memory_bytes must be greater than mheap_page_size + sizeof (mheap_t) + 16.
59  * Otherwise, allocation may fail and return 0.
60  */
61 void *mheap_alloc (void *memory, uword memory_bytes);
62 void *mheap_alloc_with_flags (void *memory, uword memory_bytes, uword flags);
63 void *mheap_alloc_with_lock (void *memory, uword size, int locked);
64 
65 #define mheap_free(v) (v) = _mheap_free(v)
66 void *_mheap_free (void *v);
67 
68 void mheap_foreach (void *v,
69  uword (*func) (void *arg, void *v, void *elt_data,
70  uword elt_size), void *arg);
71 
72 /* Format mheap data structures as string. */
73 u8 *format_mheap (u8 * s, va_list * va);
74 
75 /* Validate internal consistency. */
76 void mheap_validate (void *h);
77 
78 /* Query bytes used. */
79 uword mheap_bytes (void *v);
80 
81 void mheap_usage (void *v, clib_mem_usage_t * usage);
82 
83 /* Enable disable tracing. */
84 void mheap_trace (void *v, int enable);
85 
86 /* Test routine. */
87 int test_mheap_main (unformat_input_t * input);
88 
89 #else /* USE_DLMALLOC */
90 /* Format mheap data structures as string. */
91 u8 *format_mheap (u8 * s, va_list * va);
92 void *mheap_alloc_with_lock (void *memory, uword size, int locked);
93 
94 #endif /* USE_DLMALLOC */
95 
96 #endif /* included_mheap_h */
97 
98 /*
99  * fd.io coding-style-patch-verification: ON
100  *
101  * Local Variables:
102  * eval: (c-set-style "gnu")
103  * End:
104  */
vhost_user_memory_t memory
Definition: vhost_user.h:122
void * mheap_alloc_with_lock(void *memory, uword size, int locked)
Definition: mem_dlmalloc.c:456
static void usage(void)
Definition: health_check.c:14
static void * mheap_get(void *v, uword size, uword *offset_return)
Definition: mheap.h:51
unsigned char u8
Definition: types.h:56
void * mheap_alloc(void *memory, uword memory_bytes)
Definition: mheap.c:963
void mheap_validate(void *h)
Definition: mheap.c:1378
#define always_inline
Definition: clib.h:94
uword size
void * mheap_alloc_with_flags(void *memory, uword memory_bytes, uword flags)
Definition: mheap.c:885
struct _unformat_input_t unformat_input_t
void mheap_foreach(void *v, uword(*func)(void *arg, void *v, void *elt_data, uword elt_size), void *arg)
Definition: mheap.c:1014
static u32 * elt_data(void *v, heap_elt_t *e)
Definition: heap.c:213
u32 flags
Definition: vhost_user.h:115
uword mheap_bytes(void *v)
Definition: mheap.c:1069
void * mheap_get_aligned(void *v, uword n_user_data_bytes, uword align, uword align_offset, uword *offset_return)
Definition: mheap.c:643
u8 * format_mheap(u8 *s, va_list *va)
Definition: mem_dlmalloc.c:381
int test_mheap_main(unformat_input_t *input)
void mheap_usage(void *v, clib_mem_usage_t *usage)
Definition: mheap.c:1111
u64 uword
Definition: types.h:112
void mheap_trace(void *v, int enable)
Definition: mem_dlmalloc.c:422
CLIB vectors are ubiquitous dynamically resized arrays with by user defined "headers".