1: /*************************************************************************
2: * (C) 2008 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
6: * $Id: aitsess.h,v 1.4.2.4 2012/02/28 00:13:26 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
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 __AITSESS_H
47: #define __AITSESS_H
48:
49:
50: #include <pthread.h>
51: #include <assert.h>
52: #include <semaphore.h>
53: #include <aitio.h>
54:
55: #define SHARED_UNKNOWN -1
56: #define SHARED_IPC 0
57: #define SHARED_MAP 1
58:
59: #define IS_VAL 0x0
60: #define IS_ADD 0x40000000
61: #define IS_DEF 0x80000000
62:
63: #define ISNEW(x) (((x) & IS_ADD) == IS_ADD)
64: #define ISDEF(x) (((x) & IS_DEF) == IS_DEF)
65:
66: #define MAX_ATTRIBUTE 64
67: #define MAX_SEMNAME 14
68:
69: /* Memory pool */
70:
71: #define MEM_BUCKETS 28 /* 32 bits - 4 bits = 28 items in bucket array */
72:
73: struct tagAlloc {
74: char alloc_name[MAX_ATTRIBUTE];
75: volatile unsigned int alloc_flags;
76:
77: unsigned int *alloc_mem;
78:
79: TAILQ_ENTRY(tagAlloc) alloc_node;
80: };
81: typedef TAILQ_HEAD(, tagAlloc) mpool_bucket_t;
82:
83: typedef struct _tagMPool {
84: pthread_mutex_t pool_mtx;
85:
86: struct {
87: unsigned long alloc;
88: unsigned long free;
89: unsigned long cache;
90: } pool_calls;
91: struct {
92: unsigned long alloc;
93: unsigned long free;
94: unsigned long cache;
95: } pool_bytes;
96: struct {
97: unsigned long max;
98: unsigned long curr;
99: } pool_quota;
100:
101: /* pool buckets */
102: mpool_bucket_t pool_active[MEM_BUCKETS];
103: mpool_bucket_t pool_inactive[MEM_BUCKETS];
104: } mpool_t;
105: #define mpool_lock(x) (assert((x)), pthread_mutex_lock(&(x)->pool_mtx))
106: #define mpool_unlock(x) (assert((x)), pthread_mutex_unlock(&(x)->pool_mtx))
107:
108: /* Shared memory session */
109:
110: typedef struct tagSess {
111: key_t key;
112: char type;
113: char zcpy;
114:
115: char name[BUFSIZ];
116: off_t eom;
117: void *addr;
118: off_t offset;
119: union {
120: int shmid;
121: int fd;
122: } mem;
123: union {
124: int semid;
125: sem_t *sid;
126: } id;
127:
128: struct {
129: int (*create)(int, long, void *, ...);
130: void (*destroy)(void *);
131: void *(*attach)(void *, void *);
132: void (*detach)(void *);
133: void (*notSem)(void *);
134: int (*isSemOK)(void *);
135: int (*incSem)(void *);
136: int (*decSem)(void *);
137: } sess;
138: } ait_sess_t;
139:
140:
141: // -------------------------------------------------------
142: // sess_GetErrno() Get error code of last operation
143: inline int sess_GetErrno();
144: // sess_GetError() Get error text of last operation
145: inline const char *sess_GetError();
146: // sess_SetErr() Set error to variables for internal use!!!
147: inline void sess_SetErr(int eno, char *estr, ...);
148: // -------------------------------------------------------
149:
150:
151: /*
152: * mpool_init() - Init memory pool
153: *
154: * return: =NULL error or !=NULL new allocated pool
155: */
156: mpool_t *mpool_init(void);
157: /*
158: * mpool_destroy() - Destroy memory pool
159: *
160: * @mp = Memory pool
161: * return: none
162: */
163: void mpool_destroy(mpool_t ** __restrict mp);
164: /*
165: * mpool_purge() - Purge memory block cache and release resources
166: *
167: * @mp = Memory pool
168: * @atmost = Free at most in buckets
169: * return: -1 error or 0 ok
170: */
171: int mpool_purge(mpool_t * __restrict mp, unsigned int atmost);
172: /*
173: * mpool_malloc() - Memory allocation
174: *
175: * @mp = Memory pool
176: * @size = Size
177: * @memname = Optional memory block name
178: * return: NULL error or !=NULL ok allocated memory
179: */
180: void *mpool_malloc(mpool_t * __restrict mp, unsigned int size, const char *memname);
181: /*
182: * mpool_free() Free allocated memory with mpool_alloc()
183: *
184: * @mp = Memory pool
185: * @data = Allocated memory data
186: * @purge = if !=0 force release memory block
187: * return: <0 error or 0 ok released memory block
188: */
189: int mpool_free(mpool_t * __restrict mp, void * __restrict data, int purge);
190: /*
191: * mpool_free2() Free allocated memory with mpool_alloc() by size and memory name
192: *
193: * @mp = Memory pool
194: * @size = Allocated memory data size
195: * @memname = Memory name
196: * @purge = if !=0 force release memory block
197: * return: <0 error or 0 ok released memory block
198: */
199: int mpool_free2(mpool_t * __restrict mp, unsigned int size, const char *memname, int purge);
200: /*
201: * mpool_getmembynam() Find allocated memory block by size and memory name
202: *
203: * @mp = Memory pool
204: * @size = Memory size
205: * @memname = Memory name
206: * return: NULL error or not found and !=NULL allocated memory
207: */
208: inline struct tagAlloc *mpool_getmembynam(mpool_t * __restrict mp, unsigned int size, const char *memname);
209: /*
210: * mpool_getsizebyaddr() - Get size of allocated memory block by address
211: *
212: * @data = allocated memory from mpool_malloc()
213: * return: usable size of allocated memory block
214: */
215: inline unsigned int mpool_getsizebyaddr(void * __restrict data);
216: /*
217: * mpool_chkaddr() - Check validity of given address
218: *
219: * @data = allocated memory from mpool_malloc()
220: * return: -1 bad address, 1 corrupted address or 0 ok
221: */
222: inline int mpool_chkaddr(void * __restrict data);
223:
224:
225: /*
226: * sess_initSession() Initializing session structure, if session file not exists creating with specified tech
227: *
228: * @id = Technology using in session. SHARED_IPC IPC tech orSHARED_MAP BSD MemoryMap tech
229: * @csFName = Session filename for build key and identified
230: * @Sess = Session item, if =NULL allocate memory for session after use must be free!
231: * return: 0 OK new key created, -1 error: no memory or file not created, 1 OK key finded
232: */
233: int sess_initSession(int id, const char *csFName, ait_sess_t ** __restrict Sess);
234: /*
235: * sess_freeSession() Free allocated memory for session item and delete session file if present name
236: *
237: * @Sess = Session item
238: * return: none
239: */
240: void sess_freeSession(ait_sess_t ** __restrict Sess);
241:
242:
243: /*
244: * map_createSession() MMAP Created session and allocated resources
245: *
246: * @nSeed = Seed for securing key, if =-1 must add ready for use key
247: * @nSize = Allocated shared memory size in bytes
248: * @Sess = Session item
249: * @... = If nSeed == -1 add ready for use key value
250: * return: 0 Ok successful, -1 error: not allocated resources
251: */
252: int map_createSession(int nSeed, long nSize, ait_sess_t * __restrict Sess, ...);
253: /*
254: * map_destroySession() MMAP free shared resources
255: *
256: * @Sess = Session item
257: * return: none
258: */
259: void map_destroySession(ait_sess_t * __restrict Sess);
260:
261: /*
262: * ipc_createSession() IPC Created session and allocated resources
263: *
264: * @nSeed = Seed for securing key, if =-1 must add ready for use key
265: * @nSize = Allocated shared memory size in bytes
266: * @Sess = Session item
267: * @... = If nSeed == -1 add ready for use key value
268: * return: 0 Ok successful, -1 error: not allocated resources
269: */
270: int ipc_createSession(int nSeed, long nSize, ait_sess_t * __restrict Sess, ...);
271: /*
272: * ipc_destroySession() IPC free shared resources
273: *
274: * @Sess = Session item
275: * return: none
276: */
277: void ipc_destroySession(ait_sess_t * __restrict Sess);
278:
279: /*
280: * map_attachSession() MMAP Attach to shared memory & return begin address
281: *
282: * @s = Session item
283: * @procMem = Custom start address (optionl) *default must be 0*
284: * return: NULL failed attach, !=NULL begin address of memory
285: */
286: void *map_attachSession(ait_sess_t * __restrict s, void *procMem);
287: /*
288: * map_detachSession() MMAP Detach from shared memory
289: *
290: * @s = Session item
291: * return: none
292: */
293: void map_detachSession(ait_sess_t * __restrict s);
294:
295: /*
296: * ipc_attachSession() IPC Attach to shared memory & return begin address
297: *
298: * @s = Session item
299: * @procMem = Custom start address (optionl) *default must be 0*
300: * return: NULL failed attach, !=NULL begin address of memory
301: */
302: void *ipc_attachSession(ait_sess_t * __restrict s, void *procMem);
303: /*
304: * ipc_detachSession() IPC Detach from shared memory
305: *
306: * @s = Session item
307: * return: none
308: */
309: void ipc_detachSession(ait_sess_t * __restrict s);
310:
311: /*
312: * sess_isAttached() Check for attached shared memory
313: *
314: * @s = Session item
315: * return: -1 null session item, 0 not attached, 1 attached memory
316: */
317: inline int sess_isAttached(ait_sess_t * __restrict s);
318:
319:
320: /*
321: * map_notSemaphore() MMAP negative block if semaphore isn`t signaled
322: *
323: * @s = Session item
324: * return: none
325: */
326: void map_notSemaphore(ait_sess_t * __restrict s);
327: /*
328: * map_isSemaphoreOK() MMAP Check semaphore
329: *
330: * @s = Session item
331: * return: -1 error: can`t return semaphore, 0 = false, 1 = true
332: */
333: int map_isSemaphoreOK(ait_sess_t * __restrict s);
334: /*
335: * map_incSemaphore() MMAP unblock semaphore, increment semaphore
336: *
337: * @s = Session item
338: * return: 0 Ok, -1 error: can`t increment
339: */
340: int map_incSemaphore(ait_sess_t * __restrict s);
341: /*
342: * map_decSemaphore() MMAP block semaphore, decrement semaphore
343: *
344: * @s = Session item
345: * return: 0 Ok, -1 error: can`t decrement
346: */
347: int map_decSemaphore(ait_sess_t * __restrict s);
348:
349: /*
350: * ipc_notSemaphore() IPC negative block if semaphore isn`t signaled
351: *
352: * @s = Session item
353: * return: none
354: */
355: void ipc_notSemaphore(ait_sess_t * __restrict s);
356: /*
357: * ipc_isSemaphoreOK() IPC Check semaphore
358: *
359: * @s = Session item
360: * return: -1 error: can`t return semaphore, 0 = false, 1 = true
361: */
362: int ipc_isSemaphoreOK(ait_sess_t * __restrict s);
363: /*
364: * ipc_incSemaphore() IPC unblock semaphore, increment semaphore
365: *
366: * @s = Session item
367: * return: 0 Ok, -1 error: can`t increment
368: */
369: int ipc_incSemaphore(ait_sess_t * __restrict s);
370: /*
371: * ipc_decSemaphore() IPC block semaphore, decrement semaphore
372: *
373: * @s = Session item
374: * return: 0 Ok, -1 error: can`t decrement
375: */
376: int ipc_decSemaphore(ait_sess_t * __restrict s);
377:
378:
379: /* --------------------------------------------------------- */
380:
381: #define ALLOC_MEMORY(sd, siz, s, ...) (assert((s)), (s)->sess.create((sd), \
382: (siz), (s), ## __VA_ARGS__))
383: #define ATTACH_MEMORY(s) (assert((s)), (s)->sess.attach((s), NULL))
384: #define DETACH_MEMORY(s) do { assert((s)); (s)->sess.detach((s)); } while(0)
385: #define FREE_MEMORY(s) do { assert((s)); (s)->sess.destroy((s)); } while(0)
386:
387: #define IS_SEMOK(s) (assert((s)), (s)->sess.isSemOK((s)))
388: #define INC_SEM(s) (assert((s)), (s)->sess.incSem((s)))
389: #define DEC_SEM(s) (assert((s)), (s)->sess.decSem((s)))
390: #define NOT_SEM(s) do { assert((s)); (s)->sess.notSem((s)); } while(0)
391:
392: /* --------------------------------------------------------- */
393:
394: /*
395: * sess_FreeValues() Free all values from value array allocated from sess_GetValues()
396: *
397: * @ppsVals = Array strings
398: * return: none
399: */
400: inline void sess_FreeValues(char *** __restrict ppsVals);
401: /*
402: * sess_GetValues() Get all values from session shared memory
403: *
404: * @s = Session item
405: * @ppsVals = Return array strings
406: * return: -1 error: in parameter, !=-1 count of returned strings in ppsVals (must be free after use!)
407: */
408: int sess_GetValues(ait_sess_t * __restrict s, char ***ppsVals);
409: /*
410: * sess_GetValue() Get value from session shared memory from attribute
411: *
412: * @s = Session item
413: * @csAttr = Attribute for search
414: * @psVal = Return string buffer
415: * @pnLen = Length of return string buffer,
416: // *{pnLen} input is max_size of buffer & output is really taken bytes
417: * return: 0 not found, -1 error: in parameter, >0 get position, if define item merged with IS_DEF
418: */
419: int sess_GetValue(ait_sess_t * __restrict s, const char *csAttr, char *psVal, int *pnLen);
420: /*
421: * sess_DelValue() Delete item from session shared memory
422: *
423: * @s = Session item
424: * @csAttr = Attribute for erasing
425: * return: 0 Ok, -1 error: in parameter
426: */
427: int sess_DelValue(ait_sess_t * __restrict s, const char *csAttr);
428: /*
429: * sess_SetValue() Set item into session shared memory or update if find it
430: *
431: * @s = Session item
432: * @csAttr = Attribute
433: * @psVal = Value
434: * return: 0 nothing, -1 error: in parameter,
435: >0 set position, if add item merged with IS_ADD and if define item merged with IS_DEF
436: */
437: int sess_SetValue(ait_sess_t * __restrict s, const char *csAttr, const char *psVal);
438:
439: /*
440: * sess_prepareSession() Attach to shared memory and de-marshaling data
441: *
442: * @s = Session
443: * @useDirect = Use direct shared memory if !=0 or snapshot of data to array
444: * return: NULL error or no data, !=NULL array with variables,
445: * after use must free resources with sess_doneSession()
446: */
447: array_t *sess_prepareSession(ait_sess_t * __restrict s, char useDirect);
448: /*
449: * sess_doneSession() Free resources allocated with sess_prepareSession()
450: *
451: * @s = Session
452: * @arr = Array with variables for free
453: * return: none
454: */
455: void sess_doneSession(ait_sess_t * __restrict s, array_t ** __restrict arr);
456: /*
457: * sess_commitSession() Commit data to shared memory
458: *
459: * @s = Session
460: * @arr = Array with variables for save
461: * return -1 error or !=-1 size of stored variables into shared memory
462: */
463: int sess_commitSession(ait_sess_t * __restrict s, array_t * __restrict arr);
464:
465:
466: #endif
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