Annotation of libelwix/inc/elwix/ampool.h, revision 1.5
1.1 misho 1: /*************************************************************************
2: * (C) 2012 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
3: * by Michael Pounov <misho@elwix.org>
4: *
5: * $Author: misho $
1.5 ! misho 6: * $Id: ampool.h,v 1.4.2.1 2015/07/01 21:31:26 misho Exp $
1.1 misho 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:
1.4 misho 15: Copyright 2004 - 2015
1.1 misho 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;
1.4 misho 82: unsigned long real;
1.1 misho 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: typedef void (*mpool_stat_cb)(unsigned int, unsigned int, unsigned int);
94:
95: /* mpool functions */
96:
97: /*
98: * mpool_init() - Init memory pool
99: *
100: * @maxmem = If !=0 set maximum memory quota
101: * return: =NULL error or !=NULL new allocated pool
102: */
103: mpool_t *mpool_init(unsigned long maxmem);
104: /*
105: * mpool_destroy() - Destroy memory pool
106: *
107: * @mp = Memory pool
108: * return: none
109: */
110: void mpool_destroy(mpool_t ** __restrict mp);
111: /*
112: * mpool_purge() - Purge memory block cache and release resources
113: *
114: * @mp = Memory pool
115: * @atmost = Free at most in buckets
116: * return: -1 error or 0 ok
117: */
118: int mpool_purge(mpool_t * __restrict mp, unsigned int atmost);
119: /*
120: * mpool_malloc() - Memory allocation
121: *
122: * @mp = Memory pool
123: * @size = Size
124: * @memname = Optional memory block name
125: * return: NULL error or !=NULL ok allocated memory
126: */
127: void *mpool_malloc(mpool_t * __restrict mp, unsigned int size, const char *memname);
128: /*
129: * mpool_free() Free allocated memory with mpool_alloc()
130: *
131: * @mp = Memory pool
132: * @data = Allocated memory data
133: * @purge = if !=0 force release memory block
134: * return: <0 error or 0 ok released memory block
135: */
136: int mpool_free(mpool_t * __restrict mp, void * __restrict data, int purge);
137: /*
138: * mpool_free2() Free allocated memory with mpool_alloc() by size and memory name
139: *
140: * @mp = Memory pool
141: * @size = Allocated memory data size
142: * @memname = Memory name
143: * @purge = if !=0 force release memory block
144: * return: <0 error or 0 ok released memory block
145: */
146: int mpool_free2(mpool_t * __restrict mp, unsigned int size, const char *memname, int purge);
147: /*
148: * mpool_realloc() Reallocate memory block with new size
149: *
150: * @mp = Memory pool
151: * @data = Allocated memory data
152: * @newsize = New size of memory block
153: * @memname = Optional new memory block name
154: * return: NULL error or !=NULL new reallocated memory block
155: */
156: void *mpool_realloc(mpool_t * __restrict mp, void * __restrict data,
157: unsigned int newsize, const char *memname);
158: /*
159: * mpool_strdup() - String duplicate
160: *
161: * @mp = Memory pool
162: * @str = String
163: * @memname = Memory name
164: * return: NULL error or !=NULL new string
165: */
166: char *mpool_strdup(mpool_t * __restrict mp, const char *str, const char *memname);
167: /*
168: * mpool_getmembynam() Find allocated memory block by size and memory name
169: *
170: * @mp = Memory pool
171: * @size = Memory size
172: * @memname = Memory name
173: * return: NULL error or not found and !=NULL allocated memory
174: */
1.2 misho 175: struct tagAlloc *mpool_getmembynam(mpool_t * __restrict mp, unsigned int size, const char *memname);
1.1 misho 176: /*
177: * mpool_getsizebyaddr() - Get size of allocated memory block by address
178: *
179: * @data = allocated memory from mpool_malloc()
180: * return: usable size of allocated memory block
181: */
1.2 misho 182: unsigned int mpool_getsizebyaddr(void * __restrict data);
1.1 misho 183: /*
184: * mpool_chkaddr() - Check validity of given address
185: *
186: * @data = allocated memory from mpool_malloc()
187: * return: -1 bad address, 1 corrupted address or 0 ok
188: */
1.2 misho 189: int mpool_chkaddr(void * __restrict data);
1.1 misho 190: /*
191: * mpool_setquota() - Change maximum memory quota
192: *
193: * @mp = Memory pool
194: * @maxmem = New max quota size
195: * return: old maximum memory quota size
196: */
1.2 misho 197: unsigned long mpool_setquota(mpool_t * __restrict mp, unsigned long maxmem);
1.1 misho 198: /*
199: * mpool_getquota() - Get memory quota
200: *
201: * @mp = Memory pool
1.4 misho 202: * @currmem = Return current memory usage
203: * @realmem = Return current real memory usage
1.1 misho 204: * @maxmem = Return max quota size
205: * return: none
206: */
1.2 misho 207: void mpool_getquota(mpool_t * __restrict mp, unsigned long *currmem,
1.4 misho 208: unsigned long *realmem, unsigned long *maxmem);
1.1 misho 209: /*
210: * mpool_statistics() - Dump statistics from memory pool buckets
211: *
212: * @mp = Memory pool
213: * @cb = Export statistics to callback
214: * return: none
215: */
216: void mpool_statistics(mpool_t * __restrict mp, mpool_stat_cb cb);
217:
218:
219: /* Wrappers */
220:
221: /*
222: * mpool_xmalloc() - malloc wrapper
223: *
224: * @size = Size
225: * return: NULL error or !=NULL ok allocated memory
226: */
227: void *mpool_xmalloc(size_t size);
228: /*
229: * mpool_xcalloc() - calloc wrapper
230: *
231: * @num = number of elements
232: * @size = Size of element
233: * return: NULL error or !=NULL ok allocated memory
234: */
235: void *mpool_xcalloc(size_t num, size_t size);
236: /*
237: * mpool_xrealloc() - realloc wrapper
238: *
239: * @data = Allocated memory data
240: * @newsize = New size of memory block
241: * return: NULL error or !=NULL new reallocated memory block
242: */
243: void *mpool_xrealloc(void * __restrict data, size_t newsize);
244: /*
245: * mpool_xfree() - free wrapper
246: *
247: * @data = Allocated memory data
248: * return: none
249: */
250: void mpool_xfree(void * __restrict data);
251: /*
252: * mpool_xstrdup() - strdup wrapper
253: *
254: * @str = string
255: * return: =NULL error or !=NULL new allocated string
256: */
257: char *mpool_xstrdup(const char *str);
1.4 misho 258: /*
259: * mpool_xstatistics() - elwix memory pool statistics wrapper
260: *
261: * @cb = Export statistics to callback
262: * return: none
263: */
264: void mpool_xstatistics(mpool_stat_cb cb);
265: /*
1.5 ! misho 266: * mpool_dump() - Dump elwix memory pool statistics
1.4 misho 267: *
1.5 ! misho 268: * @mp = memory pool, if =NULL dump elwix default memory pool
! 269: * @fmt = prefix info format string
1.4 misho 270: * @... = argument(s)
271: * return: none
272: */
1.5 ! misho 273: void mpool_dump(mpool_t * __restrict mp, const char *fmt, ...);
1.1 misho 274:
275:
276: #endif
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