1: /*************************************************************************
2: * (C) 2012 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
3: * by Michael Pounov <misho@elwix.org>
4: *
5: * $Author: misho $
6: * $Id: ampool.h,v 1.1 2013/01/17 10:05:35 misho Exp $
7: *
8: **************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
46: #ifndef __AMPOOL_H
47: #define __AMPOOL_H
48:
49:
50: #include <pthread.h>
51: #include <sys/queue.h>
52:
53:
54: /* Memory pool */
55:
56: #define MEM_BUCKETS 28 /* 32 bits - 4 bits = 28 items in bucket array */
57:
58: struct tagAlloc {
59: char alloc_name[64];
60:
61: unsigned int *alloc_mem;
62:
63: TAILQ_ENTRY(tagAlloc) alloc_node;
64: };
65: typedef TAILQ_HEAD(, tagAlloc) mpool_bucket_t;
66:
67: typedef struct _tagMPool {
68: pthread_mutex_t pool_mtx;
69:
70: struct {
71: unsigned long alloc;
72: unsigned long free;
73: unsigned long cache;
74: } pool_calls;
75: struct {
76: unsigned long alloc;
77: unsigned long free;
78: unsigned long cache;
79: } pool_bytes;
80: struct {
81: unsigned long max;
82: unsigned long curr;
83: } pool_quota;
84:
85: /* pool buckets */
86: mpool_bucket_t pool_active[MEM_BUCKETS];
87: mpool_bucket_t pool_inactive[MEM_BUCKETS];
88: } mpool_t;
89: #define mpool_lock(x) (assert((x)), pthread_mutex_lock(&(x)->pool_mtx))
90: #define mpool_unlock(x) (assert((x)), pthread_mutex_unlock(&(x)->pool_mtx))
91:
92: typedef void (*mpool_stat_cb)(unsigned int, unsigned int, unsigned int);
93:
94: /* mpool functions */
95:
96: /*
97: * mpool_init() - Init memory pool
98: *
99: * @maxmem = If !=0 set maximum memory quota
100: * return: =NULL error or !=NULL new allocated pool
101: */
102: mpool_t *mpool_init(unsigned long maxmem);
103: /*
104: * mpool_destroy() - Destroy memory pool
105: *
106: * @mp = Memory pool
107: * return: none
108: */
109: void mpool_destroy(mpool_t ** __restrict mp);
110: /*
111: * mpool_purge() - Purge memory block cache and release resources
112: *
113: * @mp = Memory pool
114: * @atmost = Free at most in buckets
115: * return: -1 error or 0 ok
116: */
117: int mpool_purge(mpool_t * __restrict mp, unsigned int atmost);
118: /*
119: * mpool_malloc() - Memory allocation
120: *
121: * @mp = Memory pool
122: * @size = Size
123: * @memname = Optional memory block name
124: * return: NULL error or !=NULL ok allocated memory
125: */
126: void *mpool_malloc(mpool_t * __restrict mp, unsigned int size, const char *memname);
127: /*
128: * mpool_free() Free allocated memory with mpool_alloc()
129: *
130: * @mp = Memory pool
131: * @data = Allocated memory data
132: * @purge = if !=0 force release memory block
133: * return: <0 error or 0 ok released memory block
134: */
135: int mpool_free(mpool_t * __restrict mp, void * __restrict data, int purge);
136: /*
137: * mpool_free2() Free allocated memory with mpool_alloc() by size and memory name
138: *
139: * @mp = Memory pool
140: * @size = Allocated memory data size
141: * @memname = Memory name
142: * @purge = if !=0 force release memory block
143: * return: <0 error or 0 ok released memory block
144: */
145: int mpool_free2(mpool_t * __restrict mp, unsigned int size, const char *memname, int purge);
146: /*
147: * mpool_realloc() Reallocate memory block with new size
148: *
149: * @mp = Memory pool
150: * @data = Allocated memory data
151: * @newsize = New size of memory block
152: * @memname = Optional new memory block name
153: * return: NULL error or !=NULL new reallocated memory block
154: */
155: void *mpool_realloc(mpool_t * __restrict mp, void * __restrict data,
156: unsigned int newsize, const char *memname);
157: /*
158: * mpool_strdup() - String duplicate
159: *
160: * @mp = Memory pool
161: * @str = String
162: * @memname = Memory name
163: * return: NULL error or !=NULL new string
164: */
165: char *mpool_strdup(mpool_t * __restrict mp, const char *str, const char *memname);
166: /*
167: * mpool_getmembynam() Find allocated memory block by size and memory name
168: *
169: * @mp = Memory pool
170: * @size = Memory size
171: * @memname = Memory name
172: * return: NULL error or not found and !=NULL allocated memory
173: */
174: inline struct tagAlloc *mpool_getmembynam(mpool_t * __restrict mp, unsigned int size, const char *memname);
175: /*
176: * mpool_getsizebyaddr() - Get size of allocated memory block by address
177: *
178: * @data = allocated memory from mpool_malloc()
179: * return: usable size of allocated memory block
180: */
181: inline unsigned int mpool_getsizebyaddr(void * __restrict data);
182: /*
183: * mpool_chkaddr() - Check validity of given address
184: *
185: * @data = allocated memory from mpool_malloc()
186: * return: -1 bad address, 1 corrupted address or 0 ok
187: */
188: inline int mpool_chkaddr(void * __restrict data);
189: /*
190: * mpool_setquota() - Change maximum memory quota
191: *
192: * @mp = Memory pool
193: * @maxmem = New max quota size
194: * return: old maximum memory quota size
195: */
196: inline unsigned long mpool_setquota(mpool_t * __restrict mp, unsigned long maxmem);
197: /*
198: * mpool_getquota() - Get memory quota
199: *
200: * @mp = Memory pool
201: * @currmem = Return current memory
202: * @maxmem = Return max quota size
203: * return: none
204: */
205: inline void mpool_getquota(mpool_t * __restrict mp, unsigned long *currmem,
206: unsigned long *maxmem);
207: /*
208: * mpool_statistics() - Dump statistics from memory pool buckets
209: *
210: * @mp = Memory pool
211: * @cb = Export statistics to callback
212: * return: none
213: */
214: void mpool_statistics(mpool_t * __restrict mp, mpool_stat_cb cb);
215:
216:
217: /* Wrappers */
218:
219: /*
220: * mpool_xmalloc() - malloc wrapper
221: *
222: * @size = Size
223: * return: NULL error or !=NULL ok allocated memory
224: */
225: void *mpool_xmalloc(size_t size);
226: /*
227: * mpool_xcalloc() - calloc wrapper
228: *
229: * @num = number of elements
230: * @size = Size of element
231: * return: NULL error or !=NULL ok allocated memory
232: */
233: void *mpool_xcalloc(size_t num, size_t size);
234: /*
235: * mpool_xrealloc() - realloc wrapper
236: *
237: * @data = Allocated memory data
238: * @newsize = New size of memory block
239: * return: NULL error or !=NULL new reallocated memory block
240: */
241: void *mpool_xrealloc(void * __restrict data, size_t newsize);
242: /*
243: * mpool_xfree() - free wrapper
244: *
245: * @data = Allocated memory data
246: * return: none
247: */
248: void mpool_xfree(void * __restrict data);
249: /*
250: * mpool_xstrdup() - strdup wrapper
251: *
252: * @str = string
253: * return: =NULL error or !=NULL new allocated string
254: */
255: char *mpool_xstrdup(const char *str);
256:
257:
258: #endif
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