Annotation of libaitrpc/src/lists.c, revision 1.6.2.2
1.2 misho 1: /*************************************************************************
2: * (C) 2010 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
1.6.2.2 ! misho 6: * $Id: lists.c,v 1.6.2.1 2012/03/12 16:28:09 misho Exp $
1.2 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:
1.6.2.1 misho 15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
1.2 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: #include "global.h"
47:
48:
49: /*
1.6.2.1 misho 50: * rpc_srv_allocVars() - Allocate array for call variables
51: *
1.2 misho 52: * @call = RPC function call
1.6 misho 53: * @varnum = Number of variables, if ==0 return already allocated variables number
1.4 misho 54: * return: -1 error, !=-1 return varnum value
1.2 misho 55: */
1.6 misho 56: static inline int
1.4 misho 57: rpc_srv_allocVars(rpc_func_t * __restrict call, int varnum)
1.2 misho 58: {
1.4 misho 59: if (!call || varnum < 0) {
1.6.2.1 misho 60: rpc_SetErr(EINVAL, "Invalid parameter can`t allocate variables for RPC call");
1.2 misho 61: return -1;
1.5 misho 62: }
63:
64: if (varnum) {
1.6 misho 65: call->func_vars = io_allocVars(varnum);
1.5 misho 66: if (!call->func_vars)
67: return -1;
68: }
69:
70: return io_arraySize(call->func_vars);
1.2 misho 71: }
72:
73: /*
1.6.2.1 misho 74: * rpc_srv_getVars() - Get variables array for RPC call
75: *
1.2 misho 76: * @call = RPC function call
1.4 misho 77: * @vars = Returned variables array, may be NULL
1.2 misho 78: * return: -1 error, !=-1 Number of returned variables
79: */
80: inline int
1.5 misho 81: rpc_srv_getVars(rpc_func_t * __restrict call, array_t ** __restrict vars)
1.2 misho 82: {
83: if (!call) {
1.6.2.1 misho 84: rpc_SetErr(EINVAL, "Invalid parameter can`t get variables");
1.2 misho 85: return -1;
86: }
87:
1.4 misho 88: if (vars)
89: *vars = call->func_vars;
1.5 misho 90: return io_arraySize(call->func_vars);
1.2 misho 91: }
92:
1.6.2.1 misho 93: static inline int
94: calcHashes(rpc_func_t * __restrict func, const char *csModule, const char *csFunc)
95: {
96: char *str = NULL;
97: int len = 0;
98:
99: assert(func && csFunc);
100:
101: /* set function name */
1.6.2.2 ! misho 102: AIT_SET_STR(&func->func_name, csFunc);
1.6.2.1 misho 103: len = strlen(csFunc) + 3; /* extra 3 bytes, because add string "__" and 0 */
104: /* set module name if exists */
105: if (csModule) {
1.6.2.2 ! misho 106: AIT_SET_STR(&func->func_file, csModule);
1.6.2.1 misho 107: len += strlen(csModule);
108: }
109: /* align len to 2 */
110: len = (len + 1) & ~1;
111:
112: /* prepare hash source string */
113: str = malloc(len);
114: if (!str) {
115: LOGERR;
116: return -1;
117: } else {
118: memset(str, 0, len);
1.6.2.2 ! misho 119: if (csModule)
1.6.2.1 misho 120: strlcpy((char*) str, csModule, len);
121: strlcat((char*) str, "__", len);
122: strlcat((char*) str, csFunc, len);
123: }
124:
125: func->func_tag = crcFletcher16((u_short*) str, len / 2);
126: func->func_hash = hash_fnv((char*) str, len);
127:
128: free(str);
129: return len;
130: }
131:
1.2 misho 132: // ---------------------------------------------------------
133:
134: /*
1.6.2.1 misho 135: * rpc_srv_registerCall() - Register call to RPC server
136: *
1.2 misho 137: * @srv = RPC Server instance
138: * @csModule = Module name, if NULL self binary
139: * @csFunc = Function name
140: * @args = Number of return function arguments, use for restriction case!
141: * return: -1 error or 0 register ok
142: */
143: int
1.6.2.1 misho 144: rpc_srv_registerCall(rpc_srv_t * __restrict srv, const char *csModule,
145: const char *csFunc, u_short args)
1.2 misho 146: {
147: rpc_func_t *func;
148:
149: if (!srv || !csFunc) {
1.6.2.1 misho 150: rpc_SetErr(EINVAL, "Invalid parameter can`t register function");
1.2 misho 151: return -1;
152: }
153: if (!(func = malloc(sizeof(rpc_func_t)))) {
154: LOGERR;
155: return -1;
1.6.2.1 misho 156: } else
1.2 misho 157: memset(func, 0, sizeof(rpc_func_t));
158:
1.6.2.1 misho 159: /* calculate hashes */
1.6.2.2 ! misho 160: if (calcHashes(func, csModule, csFunc) == -1) {
! 161: AIT_FREE_VAL(&func->func_name);
! 162: AIT_FREE_VAL(&func->func_file);
1.6.2.1 misho 163: free(func);
164: return -1;
165: }
1.2 misho 166:
167: func->func_parent = srv;
168:
1.6.2.1 misho 169: /* allocate return variables */
1.4 misho 170: if (args > 0 && rpc_srv_allocVars(func, args) == -1) {
1.6.2.2 ! misho 171: AIT_FREE_VAL(&func->func_name);
! 172: AIT_FREE_VAL(&func->func_file);
1.2 misho 173: free(func);
174: return -1;
175: }
176:
1.6.2.1 misho 177: /* add to list of functions */
1.2 misho 178: pthread_mutex_lock(&srv->srv_mtx);
179: func->func_next = srv->srv_funcs;
180: srv->srv_funcs = func;
181: pthread_mutex_unlock(&srv->srv_mtx);
182: return 0;
183: }
184:
185: /*
1.6.2.1 misho 186: * rpc_srv_unregisterCall() - Unregister call from RPC server
187: *
1.2 misho 188: * @srv = RPC Server instance
189: * @csModule = Module name, if NULL self binary
190: * @csFunc = Function name
191: * return: -1 error, 0 not found call, 1 unregister ok
192: */
193: int
194: rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc)
195: {
196: rpc_func_t func, *f, *curr;
197:
198: if (!srv || !csFunc) {
1.6.2.1 misho 199: rpc_SetErr(EINVAL, "Invalid parameter can`t unregister function");
1.2 misho 200: return -1;
201: } else
1.6.2.1 misho 202: memset(&func, 0, sizeof func);
1.2 misho 203:
1.6.2.1 misho 204: /* calculate hashes */
205: if (calcHashes(&func, csModule, csFunc) == -1)
206: return -1;
1.2 misho 207:
208: f = rpc_srv_getCall(srv, func.func_tag, func.func_hash);
1.6.2.2 ! misho 209: AIT_FREE_VAL(&func.func_name);
! 210: AIT_FREE_VAL(&func.func_file);
1.3 misho 211: if (!f) /* not found element for unregister */
1.2 misho 212: return 0;
213:
1.6.2.2 ! misho 214: pthread_mutex_lock(&srv->srv_mtx);
1.6.2.1 misho 215: /* remove from list of functions */
1.5 misho 216: if (srv->srv_funcs == f) /* if is 1st element */
1.2 misho 217: srv->srv_funcs = srv->srv_funcs->func_next;
1.5 misho 218: else {
1.2 misho 219: for (curr = srv->srv_funcs; curr->func_next != f; curr = curr->func_next);
220: curr->func_next = curr->func_next->func_next;
221: }
1.6 misho 222: io_freeVars(&f->func_vars);
1.6.2.2 ! misho 223: AIT_FREE_VAL(&f->func_name);
! 224: AIT_FREE_VAL(&f->func_file);
1.5 misho 225: free(f);
1.2 misho 226: pthread_mutex_unlock(&srv->srv_mtx);
227:
228: return 1;
229: }
230:
231: /*
1.6.2.1 misho 232: * rpc_srv_getCall() - Get registered call from RPC server
233: *
1.2 misho 234: * @srv = RPC Server instance
235: * @tag = tag for function
236: * @hash = hash for function
237: * return: NULL not found call, !=NULL return call
238: */
239: inline rpc_func_t *
240: rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag, uint32_t hash)
241: {
242: rpc_func_t *f;
243:
244: if (!srv) {
1.6.2.1 misho 245: rpc_SetErr(EINVAL, "Invalid parameter can`t get function");
1.2 misho 246: return NULL;
247: }
248:
249: for (f = srv->srv_funcs; f; f = f->func_next)
250: if (f->func_tag == tag && f->func_hash == hash)
251: break;
252:
253: return f;
254: }
255:
256: /*
1.6.2.1 misho 257: * rpc_srv_getFunc() - Get registered call from RPC server by Name
258: *
1.2 misho 259: * @srv = RPC Server instance
260: * @csModule = Module name, if NULL self binary
261: * @csFunc = Function name
262: * return: NULL not found call, !=NULL return call
263: */
264: rpc_func_t *
265: rpc_srv_getFunc(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc)
266: {
1.6.2.2 ! misho 267: rpc_func_t func, *f = NULL;
1.2 misho 268:
269: if (!srv || !csFunc) {
1.6.2.1 misho 270: rpc_SetErr(EINVAL, "Invalid parameter can`t get function");
1.2 misho 271: return NULL;
272: } else
1.6.2.1 misho 273: memset(&func, 0, sizeof(rpc_func_t));
1.2 misho 274:
1.6.2.1 misho 275: /* calculate hashes */
276: if (calcHashes(&func, csModule, csFunc) == -1)
277: return NULL;
1.2 misho 278:
1.6.2.2 ! misho 279: f = rpc_srv_getCall(srv, func.func_tag, func.func_hash);
! 280:
! 281: AIT_FREE_VAL(&func.func_name);
! 282: AIT_FREE_VAL(&func.func_file);
! 283: return f;
1.2 misho 284: }
285:
286: // ---------------------------------------------------------
287:
288: /*
1.6.2.1 misho 289: * rpc_srv_getBLOB() - Get registered BLOB
290: *
1.2 misho 291: * @srv = RPC Server instance
292: * @var = hash for variable
293: * return: NULL not found, !=NULL return blob var
294: */
295: inline rpc_blob_t *
296: rpc_srv_getBLOB(rpc_srv_t * __restrict srv, uint32_t var)
297: {
298: rpc_blob_t *b;
299:
300: if (!srv) {
1.6.2.1 misho 301: rpc_SetErr(EINVAL, "Invalid parameter can`t get BLOB variable");
1.2 misho 302: return NULL;
303: }
304:
305: for (b = srv->srv_blob.blobs; b; b = b->blob_next) {
306: if (b->blob_var == var)
307: break;
308: }
309:
310: return b;
311: }
312:
313: /*
1.6.2.1 misho 314: * rpc_srv_registerBLOB() - Register new BLOB to server
315: *
1.2 misho 316: * @srv = RPC Server instance
317: * @len = BLOB length
318: * return: NULL error or new registered BLOB
319: */
320: rpc_blob_t *
321: rpc_srv_registerBLOB(rpc_srv_t * __restrict srv, size_t len)
322: {
323: rpc_blob_t *blob = NULL;
324:
325: if (!srv || !len) {
1.6.2.1 misho 326: rpc_SetErr(EINVAL, "Invalid parameter can`t register BLOB variable");
1.2 misho 327: return blob;
328: }
329:
330: blob = rpc_srv_blobCreate(srv, len);
331: if (blob) {
332: pthread_mutex_lock(&srv->srv_blob.mtx);
333: blob->blob_next = srv->srv_blob.blobs;
334: srv->srv_blob.blobs = blob;
335: pthread_mutex_unlock(&srv->srv_blob.mtx);
336: }
337:
338: return blob;
339: }
340:
341: /*
1.6.2.1 misho 342: * rpc_srv_unregisterBLOB() - Unregister BLOB from server
343: *
1.2 misho 344: * @srv = RPC Server instance
345: * @var = BLOB Variable for unregister
346: * return: -1 error, 0 not found call, 1 unregister ok
347: */
348: int
349: rpc_srv_unregisterBLOB(rpc_srv_t * __restrict srv, uint32_t var)
350: {
351: rpc_blob_t *b, *curr;
352:
353: if (!srv) {
1.6.2.1 misho 354: rpc_SetErr(EINVAL, "Invalid parameter can`t unregister BLOB variable");
1.2 misho 355: return -1;
356: }
357:
358: b = rpc_srv_getBLOB(srv, var);
1.3 misho 359: if (!b) /* not found element for unregister */
1.2 misho 360: return 0;
1.5 misho 361: /* if BLOB is unmapped force to unmap object */
362: if (b->blob_data)
363: rpc_srv_blobUnmap(b);
1.2 misho 364:
365: pthread_mutex_lock(&srv->srv_blob.mtx);
1.3 misho 366: if (srv->srv_blob.blobs == b) { /* if is 1st element */
1.2 misho 367: srv->srv_blob.blobs = srv->srv_blob.blobs->blob_next;
368: } else {
369: for (curr = srv->srv_blob.blobs; curr->blob_next != b; curr = curr->blob_next);
370: curr->blob_next = curr->blob_next->blob_next;
371: }
1.5 misho 372: pthread_mutex_unlock(&srv->srv_blob.mtx);
1.2 misho 373: rpc_srv_blobFree(srv, b);
374: free(b);
375:
376: return 1;
377: }
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