3 /* cbps - persistant states for callbacks */
5 /* Copyright (c) 2003 Olivier Aumage. */
6 /* Copyright (c) 2003, 2004 Martin Quinson. */
7 /* All rights reserved. */
9 /* This program is free software; you can redistribute it and/or modify it
10 * under the terms of the license (GNU LGPL) which comes with this package. */
13 #include "gras/DataDesc/datadesc_private.h"
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_ddt_cbps,gras_ddt,"callback persistant state");
17 gras_datadesc_type_t type;
19 } s_gras_cbps_elm_t, *gras_cbps_elm_t;
21 typedef struct s_gras_cbps {
22 xbt_dynar_t lints; /* simple stack of long integers (easy interface) */
24 xbt_dict_t space; /* varname x dynar of gras_cbps_elm_t */
25 xbt_dynar_t frames; /* of dynar of names defined within this frame
26 (and to pop when we leave it) */
30 gras_cbps_t gras_cbps_new(void) {
33 res=xbt_new(s_gras_cbps_t,1);
35 res->lints = xbt_dynar_new(sizeof(int), NULL);
36 res->space = xbt_dict_new();
37 /* no leak, the content is freed manually on block_end */
38 res->frames = xbt_dynar_new(sizeof(xbt_dynar_t), NULL);
39 res->globals = xbt_dynar_new(sizeof(char*), NULL);
41 gras_cbps_block_begin(res);
46 void gras_cbps_free(gras_cbps_t *state) {
48 xbt_dynar_free( &( (*state)->lints ) );
50 gras_cbps_block_end(*state);
51 xbt_dict_free ( &( (*state)->space ) );
52 xbt_dynar_free( &( (*state)->frames ) );
53 xbt_dynar_free( &( (*state)->globals ) );
59 void gras_cbps_reset(gras_cbps_t state) {
61 xbt_dynar_reset(state->lints);
63 xbt_dict_reset (state->space);
65 xbt_dynar_reset(state->frames);
66 xbt_dynar_reset(state->globals);
69 /** \brief Declare a new element in the PS, and give it a value.
71 * If an element of that
72 * name already exists, it is masked by the one given here, and will be
73 * seeable again only after a pop to remove the value this push adds.
76 gras_cbps_v_push(gras_cbps_t ps,
79 gras_datadesc_type_t ddt) {
81 xbt_dynar_t varstack=NULL,frame;
83 char *varname = (char*)xbt_strdup(name);
86 DEBUG2("push(%s,%p)",name,(void*)data);
89 varstack = xbt_dict_get(ps->space, name);
91 if (e.category != mismatch_error)
94 DEBUG1("Create a new variable stack for '%s' into the space",name);
95 varstack = xbt_dynar_new(sizeof (gras_cbps_elm_t *), NULL);
96 xbt_dict_set(ps->space, varname, (void **)varstack, NULL);
98 /* leaking, you think? only if you do not close all the openned blocks ;)*/
101 var = xbt_new0(s_gras_cbps_elm_t,1);
105 xbt_dynar_push(varstack, &var);
107 xbt_dynar_pop(ps->frames, &frame);
108 DEBUG4("Push %s (%p @%p) into frame %p",varname,(void*)varname,(void*)&varname,(void*)frame);
109 xbt_dynar_push(frame, &varname);
110 xbt_dynar_push(ps->frames, &frame);
113 /** \brief Retrieve an element from the PS, and remove it from the PS.
115 * If it's not present in the current block, it will fail (throwing not_found)
116 * and not search in upper blocks since this denotes a programmation error.
119 gras_cbps_v_pop (gras_cbps_t ps,
121 gras_datadesc_type_t *ddt,
123 xbt_dynar_t varstack,frame;
124 gras_cbps_elm_t var = NULL;
128 DEBUG1("pop(%s)",name);
130 varstack = xbt_dict_get(ps->space, name);
132 if (e.category != mismatch_error)
136 THROW1(not_found_error,1,"Asked to pop the non-existant %s", name);
138 xbt_dynar_pop(varstack, &var);
140 if (!xbt_dynar_length(varstack)) {
141 DEBUG1("Last incarnation of %s poped. Kill it",name);
142 xbt_dict_remove(ps->space, name);
143 xbt_dynar_free(&varstack);
152 xbt_dynar_pop(ps->frames, &frame);
154 int l = xbt_dynar_length(frame);
159 _name = xbt_dynar_get_as(frame, l, char*);
160 if (!strcmp(name, _name)) {
161 xbt_dynar_remove_at(frame, l, &_name);
167 xbt_dynar_push(ps->frames, &frame);
172 /** \brief Change the value of an element in the PS.
174 * If it's not present in the current block, look in the upper ones.
175 * If it's not present in any of them, modify in the globals
176 * If not present there neither, the code may segfault (Oli?).
178 * Once a reference to an element of that name is found somewhere in the PS,
179 * its value is changed.
182 gras_cbps_v_set (gras_cbps_t ps,
185 gras_datadesc_type_t ddt) {
187 xbt_dynar_t dynar = NULL;
188 gras_cbps_elm_t elm = NULL;
190 DEBUG1("set(%s)",name);
191 dynar = xbt_dict_get_or_null(ps->space, name);
194 dynar = xbt_dynar_new(sizeof (gras_cbps_elm_t), NULL);
195 xbt_dict_set(ps->space, name, (void **)dynar, NULL);
197 elm = xbt_new0(s_gras_cbps_elm_t,1);
198 xbt_dynar_push(ps->globals, &name);
200 xbt_dynar_pop(dynar, &elm);
206 xbt_dynar_push(dynar, &elm);
210 /** \brief Get the value of an element in the PS without modifying it.
212 * (note that you get the content of the data struct and not a copy to it)
213 * If it's not present in the current block, look in the upper ones.
214 * If it's not present in any of them, look in the globals
215 * If not present there neither, the code may segfault (Oli?).
218 gras_cbps_v_get (gras_cbps_t ps,
220 /* OUT */gras_datadesc_type_t *ddt) {
222 xbt_dynar_t dynar = NULL;
223 gras_cbps_elm_t elm = NULL;
225 DEBUG1("get(%s)",name);
226 dynar = xbt_dict_get(ps->space, name);
227 xbt_dynar_pop(dynar, &elm);
228 xbt_dynar_push(dynar, &elm);
238 /** \brief Begins a new block.
240 * Blocks are usefull to remove a whole set of declarations you don't even know
242 * E.g., they constitute an elegent solution to recursive data structures.
244 * push/pop may be used in some cases for that, but if your recursive data
245 * struct contains other structs needing themselves callbacks, you have to
246 * use block_{begin,end} to do the trick.
250 gras_cbps_block_begin(gras_cbps_t ps) {
252 xbt_dynar_t dynar = NULL;
254 DEBUG0(">>> Block begin");
255 dynar = xbt_dynar_new(sizeof (char *), NULL);
256 xbt_dynar_push(ps->frames, &dynar);
259 /** \brief End the current block, and go back to the upper one. */
261 gras_cbps_block_end(gras_cbps_t ps) {
263 xbt_dynar_t frame = NULL;
264 unsigned int cursor = 0;
267 xbt_assert0(xbt_dynar_length(ps->frames),
268 "More block_end than block_begin");
269 xbt_dynar_pop(ps->frames, &frame);
271 xbt_dynar_foreach(frame, cursor, name) {
273 xbt_dynar_t varstack = NULL;
274 gras_cbps_elm_t var = NULL;
276 DEBUG2("Get ride of %s (%p)",name,(void*)name);
277 varstack = xbt_dict_get(ps->space, name);
278 xbt_dynar_pop(varstack, &var);
280 if (!xbt_dynar_length(varstack)) {
281 xbt_dict_remove(ps->space, name);
282 xbt_dynar_free_container(&varstack); /*already empty, save a test ;) */
285 if (var->data) free(var->data);
289 xbt_dynar_free_container(&frame);/* we just emptied it */
290 DEBUG0("<<< Block end");
294 /** \brief Push a new integer value into the cbps. */
296 gras_cbps_i_push(gras_cbps_t ps,
298 DEBUG1("push %d as a size",val);
299 xbt_dynar_push_as(ps->lints,int,val);
301 /** \brief Pop the lastly pushed integer value from the cbps. */
303 gras_cbps_i_pop(gras_cbps_t ps) {
306 xbt_assert0(xbt_dynar_length(ps->lints) > 0,
307 "gras_cbps_i_pop: no value to pop");
308 ret = xbt_dynar_pop_as(ps->lints,int);
309 DEBUG1("pop %d as a size",ret);
313 /** \brief Generic cb returning the lastly pushed value
315 * Used by \ref gras_datadesc_ref_pop_arr
317 int gras_datadesc_cb_pop(gras_datadesc_type_t ignored, gras_cbps_t vars, void *data) {
318 int res = gras_cbps_i_pop(vars);
319 DEBUG1("Pop %d as a size",res);
323 /* ************************* */
324 /* **** PUSHy callbacks **** */
325 /* ************************* */
327 /** \brief Cb to push an integer. Must be attached to the field you want to push */
328 void gras_datadesc_cb_push_int(gras_datadesc_type_t ignored, gras_cbps_t vars, void *data) {
330 gras_cbps_i_push(vars, (int) *i);
333 /** \brief Cb to push an unsigned integer. Must be attached to the field you want to push */
334 void gras_datadesc_cb_push_uint(gras_datadesc_type_t ignored, gras_cbps_t vars, void *data) {
335 unsigned int *i = (unsigned int*)data;
336 gras_cbps_i_push(vars, (int) *i);
339 /** \brief Cb to push an long integer. Must be attached to the field you want to push
341 void gras_datadesc_cb_push_lint(gras_datadesc_type_t ignored, gras_cbps_t vars, void *data) {
342 long int *i = (long int*)data;
343 gras_cbps_i_push(vars, (int) *i);
345 /** \brief Cb to push an unsigned long integer. Must be attached to the field you want to push
347 void gras_datadesc_cb_push_ulint(gras_datadesc_type_t ignored, gras_cbps_t vars, void *data) {
348 unsigned long int *i = (unsigned long int*)data;
349 gras_cbps_i_push(vars, (int) *i);
352 /* ************************************ */
353 /* **** PUSHy multiplier callbacks **** */
354 /* ************************************ */
355 /** \brief Cb to push an integer as multiplier. Must be attached to the field you want to push */
356 void gras_datadesc_cb_push_int_mult(gras_datadesc_type_t ignored, gras_cbps_t vars, void *data) {
357 int old = *(int*)data;
358 int new = gras_cbps_i_pop(vars);
359 DEBUG2("push %d x %d as a size",old,new);
360 gras_cbps_i_push(vars, old*new);
363 /** \brief Cb to push an unsigned integer as multiplier. Must be attached to the field you want to push */
364 void gras_datadesc_cb_push_uint_mult(gras_datadesc_type_t ignored, gras_cbps_t vars, void *data) {
365 unsigned int old = *(unsigned int*)data;
366 unsigned int new = gras_cbps_i_pop(vars);
368 DEBUG2("push %d x %d as a size",old,new);
369 gras_cbps_i_push(vars, (int) (old*new));
372 /** \brief Cb to push an long integer as multiplier. Must be attached to the field you want to push
374 void gras_datadesc_cb_push_lint_mult(gras_datadesc_type_t ignored, gras_cbps_t vars, void *data) {
375 long int i = *(long int*)data;
376 i *= gras_cbps_i_pop(vars);
377 gras_cbps_i_push(vars, (int) i);
379 /** \brief Cb to push an unsigned long integer as multiplier. Must be attached to the field you want to push
381 void gras_datadesc_cb_push_ulint_mult(gras_datadesc_type_t ignored, gras_cbps_t vars, void *data) {
382 unsigned long int old = *(unsigned long int*)data;
383 unsigned long int new = gras_cbps_i_pop(vars);
385 DEBUG2("push %ld x %ld as a size",old,new);
386 gras_cbps_i_push(vars, (int) (old * new) );