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 1.8 2025/08/21 15:43:00 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 - 2024
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 real;
83: unsigned long curr;
84: } pool_quota;
85:
86: /* pool buckets */
87: mpool_bucket_t pool_active[MEM_BUCKETS];
88: mpool_bucket_t pool_inactive[MEM_BUCKETS];
89: } mpool_t;
90: #define mpool_lock(x) (assert((x)), pthread_mutex_lock(&(x)->pool_mtx))
91: #define mpool_unlock(x) (assert((x)), pthread_mutex_unlock(&(x)->pool_mtx))
92:
93: #ifdef __cplusplus
94: extern "C" {
95: #endif
96:
97: typedef int (*mpool_stat_cb)(unsigned int, unsigned int, unsigned int,
98: void *, unsigned int);
99:
100: /* mpool functions */
101:
102: /*
103: * mpool_init() - Init memory pool
104: *
105: * @maxmem = If !=0 set maximum memory quota
106: * return: =NULL error or !=NULL new allocated pool
107: */
108: mpool_t *mpool_init(unsigned long maxmem);
109: /*
110: * mpool_destroy() - Destroy memory pool
111: *
112: * @mp = Memory pool
113: * return: none
114: */
115: void mpool_destroy(mpool_t ** __restrict mp);
116: /*
117: * mpool_purge() - Purge memory block cache and release resources
118: *
119: * @mp = Memory pool
120: * @atmost = Free at most in buckets
121: * return: -1 error or 0 ok
122: */
123: int mpool_purge(mpool_t * __restrict mp, unsigned int atmost);
124: /*
125: * mpool_malloc() - Memory allocation
126: *
127: * @mp = Memory pool
128: * @size = Size
129: * @memname = Optional memory block name
130: * return: NULL error or !=NULL ok allocated memory
131: */
132: void *mpool_malloc(mpool_t * __restrict mp, unsigned int size, const char *memname);
133: /*
134: * mpool_calloc() - Multiple memory block allocation
135: *
136: * @mp = Memory pool
137: * @nmemb = Number of memory blocks
138: * @size = Size
139: * @memname = Optional memory block name
140: * return: NULL error or !=NULL ok allocated memory
141: */
142: void *mpool_calloc(mpool_t * __restrict mp, u_int nmemb, u_int size, const char *memname);
143: /*
144: * mpool_free() Free allocated memory with mpool_alloc()
145: *
146: * @mp = Memory pool
147: * @data = Allocated memory data
148: * @purge = if !=0 force release memory block
149: * return: <0 error or 0 ok released memory block
150: */
151: int mpool_free(mpool_t * __restrict mp, void * __restrict data, int purge);
152: /*
153: * mpool_free2() Free allocated memory with mpool_alloc() by size and memory name
154: *
155: * @mp = Memory pool
156: * @size = Allocated memory data size
157: * @memname = Memory name
158: * @purge = if !=0 force release memory block
159: * return: <0 error or 0 ok released memory block
160: */
161: int mpool_free2(mpool_t * __restrict mp, unsigned int size, const char *memname, int purge);
162: /*
163: * mpool_realloc() Reallocate memory block with new size
164: *
165: * @mp = Memory pool
166: * @data = Allocated memory data
167: * @newsize = New size of memory block
168: * @memname = Optional new memory block name
169: * return: NULL error or !=NULL new reallocated memory block
170: */
171: void *mpool_realloc(mpool_t * __restrict mp, void * __restrict data,
172: unsigned int newsize, const char *memname);
173: /*
174: * mpool_strdup() - String duplicate
175: *
176: * @mp = Memory pool
177: * @str = String
178: * @memname = Memory name
179: * return: NULL error or !=NULL new string
180: */
181: char *mpool_strdup(mpool_t * __restrict mp, const char *str, const char *memname);
182: /*
183: * mpool_getmembynam() Find allocated memory block by size and memory name
184: *
185: * @mp = Memory pool
186: * @size = Memory size
187: * @memname = Memory name
188: * return: NULL error or not found and !=NULL allocated memory
189: */
190: struct tagAlloc *mpool_getmembynam(mpool_t * __restrict mp, unsigned int size, const char *memname);
191: /*
192: * mpool_getsizebyaddr() - Get size of allocated memory block by address
193: *
194: * @data = allocated memory from mpool_malloc()
195: * return: usable size of allocated memory block
196: */
197: unsigned int mpool_getsizebyaddr(void * __restrict data);
198: /*
199: * mpool_chkaddr() - Check validity of given address
200: *
201: * @data = allocated memory from mpool_malloc()
202: * return: -1 bad address, 1 corrupted address or 0 ok
203: */
204: int mpool_chkaddr(void * __restrict data);
205: /*
206: * mpool_setquota() - Change maximum memory quota
207: *
208: * @mp = Memory pool
209: * @maxmem = New max quota size
210: * return: old maximum memory quota size
211: */
212: unsigned long mpool_setquota(mpool_t * __restrict mp, unsigned long maxmem);
213: /*
214: * mpool_getquota() - Get memory quota
215: *
216: * @mp = Memory pool
217: * @currmem = Return current memory usage
218: * @realmem = Return current real memory usage
219: * @maxmem = Return max quota size
220: * return: none
221: */
222: void mpool_getquota(mpool_t * __restrict mp, unsigned long *currmem,
223: unsigned long *realmem, unsigned long *maxmem);
224: /*
225: * mpool_statistics() - Dump statistics from memory pool buckets
226: *
227: * @mp = Memory pool
228: * @cb = Export statistics to callback
229: * return: -1 error or >0 bytes in data buffer
230: */
231: int mpool_statistics(mpool_t * __restrict mp, mpool_stat_cb cb,
232: void *data, unsigned int datlen);
233:
234:
235: /* Wrappers */
236:
237: /*
238: * mpool_xmalloc() - malloc wrapper
239: *
240: * @size = Size
241: * return: NULL error or !=NULL ok allocated memory
242: */
243: void *mpool_xmalloc(size_t size);
244: /*
245: * mpool_xcalloc() - calloc wrapper
246: *
247: * @num = number of elements
248: * @size = Size of element
249: * return: NULL error or !=NULL ok allocated memory
250: */
251: void *mpool_xcalloc(size_t num, size_t size);
252: /*
253: * mpool_xrealloc() - realloc wrapper
254: *
255: * @data = Allocated memory data
256: * @newsize = New size of memory block
257: * return: NULL error or !=NULL new reallocated memory block
258: */
259: void *mpool_xrealloc(void * __restrict data, size_t newsize);
260: /*
261: * mpool_xfree() - free wrapper
262: *
263: * @data = Allocated memory data
264: * return: none
265: */
266: void mpool_xfree(void * __restrict data);
267: /*
268: * mpool_xstrdup() - strdup wrapper
269: *
270: * @str = string
271: * return: =NULL error or !=NULL new allocated string
272: */
273: char *mpool_xstrdup(const char *str);
274: /*
275: * mpool_xstatistics() - elwix default memory pool statistics wrapper
276: *
277: * @cb = Export statistics to callback
278: * @data = data buffer
279: * @datlen = data buffer length
280: * return: -1 error or >0 bytes in data buffer
281: */
282: int mpool_xstatistics(mpool_stat_cb cb, void *data, unsigned int datlen);
283: /*
284: * mpool_dump() - Dump elwix memory pool statistics
285: *
286: * @mp = memory pool, if =NULL dump elwix default memory pool
287: * @fmt = prefix info format string
288: * @... = argument(s)
289: * return: none
290: */
291: void mpool_dump(mpool_t * __restrict mp, const char *fmt, ...);
292: /*
293: * mpool_dump2() - Dump elwix memory pool statistics to string
294: *
295: * @mp = memory pool, if =NULL dump elwix default memory pool
296: * @str = string buffer
297: * @strlen = string buffer length
298: * return: >0 data in string buffer
299: */
300: int mpool_dump2(mpool_t * __restrict mp, char *str, int strlen);
301:
302: #ifdef __cplusplus
303: }
304: #endif
305:
306: #endif
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