--- /dev/null
+/* cbps - persistant states for callbacks */
+
+/* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include "xbt/ex.h"
+#include "xbt/datadesc/datadesc_private.h"
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_ddt_cbps, xbt_ddt,
+ "callback persistant state");
+
+typedef struct {
+ xbt_datadesc_type_t type;
+ void *data;
+} s_xbt_cbps_elm_t, *xbt_cbps_elm_t;
+
+typedef struct s_xbt_cbps {
+ xbt_dynar_t lints; /* simple stack of long integers (easy interface) */
+
+ xbt_dict_t space; /* varname x dynar of xbt_cbps_elm_t */
+ xbt_dynar_t frames; /* of dynar of names defined within this frame
+ (and to pop when we leave it) */
+ xbt_dynar_t globals;
+} s_xbt_cbps_t;
+
+xbt_cbps_t xbt_cbps_new(void)
+{
+ xbt_cbps_t res;
+
+ res = xbt_new(s_xbt_cbps_t, 1);
+
+ res->lints = xbt_dynar_new(sizeof(int), NULL);
+ res->space = xbt_dict_new_homogeneous(NULL);
+ /* no leak, the content is freed manually on block_end */
+ res->frames = xbt_dynar_new(sizeof(xbt_dynar_t), NULL);
+ res->globals = xbt_dynar_new(sizeof(char *), NULL);
+
+ xbt_cbps_block_begin(res);
+
+ return res;
+}
+
+void xbt_cbps_free(xbt_cbps_t * state)
+{
+
+ xbt_dynar_free(&((*state)->lints));
+
+ xbt_cbps_block_end(*state);
+ xbt_dict_free(&((*state)->space));
+ xbt_dynar_free(&((*state)->frames));
+ xbt_dynar_free(&((*state)->globals));
+
+ free(*state);
+ *state = NULL;
+}
+
+void xbt_cbps_reset(xbt_cbps_t state)
+{
+
+ xbt_dynar_reset(state->lints);
+
+ xbt_dict_reset(state->space);
+
+ xbt_dynar_reset(state->frames);
+ xbt_dynar_reset(state->globals);
+}
+
+/** \brief Declare a new element in the PS, and give it a value.
+ *
+ * If an element of that
+ * name already exists, it is masked by the one given here, and will be
+ * seeable again only after a pop to remove the value this push adds.
+ */
+void
+xbt_cbps_v_push(xbt_cbps_t ps,
+ const char *name, void *data, xbt_datadesc_type_t ddt)
+{
+
+ xbt_dynar_t varstack = NULL, frame;
+ xbt_cbps_elm_t var;
+ char *varname = (char *) xbt_strdup(name);
+ xbt_ex_t e;
+
+ XBT_DEBUG("push(%s,%p)", name, (void *) data);
+
+ TRY {
+ varstack = xbt_dict_get(ps->space, name);
+ }
+ CATCH(e) {
+ if (e.category != mismatch_error)
+ RETHROW;
+
+ XBT_DEBUG("Create a new variable stack for '%s' into the space", name);
+ varstack = xbt_dynar_new(sizeof(xbt_cbps_elm_t *), NULL);
+ xbt_dict_set(ps->space, name, (void **) varstack, NULL);
+ xbt_ex_free(e);
+ /* leaking, you think? only if you do not close all the openned blocks ;) */
+ }
+
+ var = xbt_new0(s_xbt_cbps_elm_t, 1);
+ var->type = ddt;
+ var->data = data;
+
+ xbt_dynar_push(varstack, &var);
+
+ xbt_dynar_pop(ps->frames, &frame);
+ XBT_DEBUG("Push %s (%p @%p) into frame %p", varname, (void *) varname,
+ (void *) &varname, (void *) frame);
+ xbt_dynar_push(frame, &varname);
+ xbt_dynar_push(ps->frames, &frame);
+}
+
+/** \brief Retrieve an element from the PS, and remove it from the PS.
+ *
+ * If it's not present in the current block, it will fail (throwing not_found)
+ * and not search in upper blocks since this denotes a programmation error.
+ */
+void
+xbt_cbps_v_pop(xbt_cbps_t ps,
+ const char *name, xbt_datadesc_type_t * ddt, void **res)
+{
+ xbt_dynar_t varstack = NULL, frame = NULL;
+ xbt_cbps_elm_t var = NULL;
+ void *data = NULL;
+ xbt_ex_t e;
+
+ XBT_DEBUG("pop(%s)", name);
+ TRY {
+ varstack = xbt_dict_get(ps->space, name);
+ }
+ CATCH(e) {
+ if (e.category != mismatch_error)
+ RETHROW;
+
+ xbt_ex_free(e);
+ THROWF(not_found_error, 1, "Asked to pop the non-existant %s", name);
+ }
+ xbt_dynar_pop(varstack, &var);
+
+ if (xbt_dynar_is_empty(varstack)) {
+ XBT_DEBUG("Last incarnation of %s poped. Kill it", name);
+ xbt_dict_remove(ps->space, name);
+ xbt_dynar_free(&varstack);
+ }
+
+ if (ddt)
+ *ddt = var->type;
+ data = var->data;
+
+ free(var);
+
+ xbt_dynar_pop(ps->frames, &frame);
+ {
+ int l = xbt_dynar_length(frame);
+
+ while (l--) {
+ char *_name = NULL;
+
+ _name = xbt_dynar_get_as(frame, l, char *);
+ if (!strcmp(name, _name)) {
+ xbt_dynar_remove_at(frame, l, &_name);
+ free(_name);
+ break;
+ }
+ }
+ }
+ xbt_dynar_push(ps->frames, &frame);
+
+ *res = data;
+}
+
+/** \brief Change the value of an element in the PS.
+ *
+ * If it's not present in the current block, look in the upper ones.
+ * If it's not present in any of them, modify in the globals
+ * If not present there neither, the code may segfault (Oli?).
+ *
+ * Once a reference to an element of that name is found somewhere in the PS,
+ * its value is changed.
+ */
+void
+xbt_cbps_v_set(xbt_cbps_t ps,
+ const char *name, void *data, xbt_datadesc_type_t ddt)
+{
+
+ xbt_dynar_t dynar = NULL;
+ xbt_cbps_elm_t elm = NULL;
+
+ XBT_DEBUG("set(%s)", name);
+ dynar = xbt_dict_get_or_null(ps->space, name);
+
+ if (dynar == NULL) {
+ dynar = xbt_dynar_new(sizeof(xbt_cbps_elm_t), NULL);
+ xbt_dict_set(ps->space, name, (void **) dynar, NULL);
+
+ elm = xbt_new0(s_xbt_cbps_elm_t, 1);
+ xbt_dynar_push(ps->globals, &name);
+ } else {
+ xbt_dynar_pop(dynar, &elm);
+ }
+
+ elm->type = ddt;
+ elm->data = data;
+
+ xbt_dynar_push(dynar, &elm);
+
+}
+
+/** \brief Get the value of an element in the PS without modifying it.
+ *
+ * (note that you get the content of the data struct and not a copy to it)
+ * If it's not present in the current block, look in the upper ones.
+ * If it's not present in any of them, look in the globals
+ * If not present there neither, the code may segfault (Oli?).
+ */
+void *xbt_cbps_v_get(xbt_cbps_t ps, const char *name,
+ /* OUT */ xbt_datadesc_type_t * ddt)
+{
+
+ xbt_dynar_t dynar = NULL;
+ xbt_cbps_elm_t elm = NULL;
+
+ XBT_DEBUG("get(%s)", name);
+ dynar = xbt_dict_get(ps->space, name);
+ xbt_dynar_pop(dynar, &elm);
+ xbt_dynar_push(dynar, &elm);
+
+ if (ddt) {
+ *ddt = elm->type;
+ }
+
+ return elm->data;
+
+}
+
+/** \brief Begins a new block.
+ *
+ * Blocks are usefull to remove a whole set of declarations you don't even know
+ *
+ * E.g., they constitute an elegent solution to recursive data structures.
+ *
+ * push/pop may be used in some cases for that, but if your recursive data
+ * struct contains other structs needing themselves callbacks, you have to
+ * use block_{begin,end} to do the trick.
+ */
+
+void xbt_cbps_block_begin(xbt_cbps_t ps)
+{
+
+ xbt_dynar_t dynar = NULL;
+
+ XBT_DEBUG(">>> Block begin");
+ dynar = xbt_dynar_new(sizeof(char *), NULL);
+ xbt_dynar_push(ps->frames, &dynar);
+}
+
+/** \brief End the current block, and go back to the upper one. */
+void xbt_cbps_block_end(xbt_cbps_t ps)
+{
+
+ xbt_dynar_t frame = NULL;
+ unsigned int cursor = 0;
+ char *name = NULL;
+
+ xbt_assert(xbt_dynar_length(ps->frames),
+ "More block_end than block_begin");
+ xbt_dynar_pop(ps->frames, &frame);
+
+ xbt_dynar_foreach(frame, cursor, name) {
+
+ xbt_dynar_t varstack = NULL;
+ xbt_cbps_elm_t var = NULL;
+
+ XBT_DEBUG("Get ride of %s (%p)", name, (void *) name);
+ varstack = xbt_dict_get(ps->space, name);
+ xbt_dynar_pop(varstack, &var);
+
+ if (xbt_dynar_is_empty(varstack)) {
+ xbt_dict_remove(ps->space, name);
+ xbt_dynar_free_container(&varstack); /*already empty, save a test ;) */
+ }
+
+ free(var->data);
+ free(var);
+ free(name);
+ }
+ xbt_dynar_free_container(&frame); /* we just emptied it */
+ XBT_DEBUG("<<< Block end");
+}
+
+
+/** \brief Push a new integer value into the cbps. */
+void xbt_cbps_i_push(xbt_cbps_t ps, int val)
+{
+ XBT_DEBUG("push %d as a size", val);
+ xbt_dynar_push_as(ps->lints, int, val);
+}
+
+/** \brief Pop the lastly pushed integer value from the cbps. */
+int xbt_cbps_i_pop(xbt_cbps_t ps)
+{
+ int ret;
+
+ xbt_assert(!xbt_dynar_is_empty(ps->lints),
+ "xbt_cbps_i_pop: no value to pop");
+ ret = xbt_dynar_pop_as(ps->lints, int);
+ XBT_DEBUG("pop %d as a size", ret);
+ return ret;
+}
+
+/** \brief Generic cb returning the lastly pushed value
+ *
+ * Used by \ref xbt_datadesc_ref_pop_arr
+ */
+int xbt_datadesc_cb_pop(xbt_datadesc_type_t ignored, xbt_cbps_t vars,
+ void *data)
+{
+ return xbt_cbps_i_pop(vars);
+}
+
+/* ************************* */
+/* **** PUSHy callbacks **** */
+/* ************************* */
+
+/** \brief Cb to push an integer. Must be attached to the field you want to push */
+void xbt_datadesc_cb_push_int(xbt_datadesc_type_t ignored,
+ xbt_cbps_t vars, void *data)
+{
+ int *i = (int *) data;
+ xbt_cbps_i_push(vars, (int) *i);
+}
+
+/** \brief Cb to push an unsigned integer. Must be attached to the field you want to push */
+void xbt_datadesc_cb_push_uint(xbt_datadesc_type_t ignored,
+ xbt_cbps_t vars, void *data)
+{
+ unsigned int *i = (unsigned int *) data;
+ xbt_cbps_i_push(vars, (int) *i);
+}
+
+/** \brief Cb to push an long integer. Must be attached to the field you want to push
+ */
+void xbt_datadesc_cb_push_lint(xbt_datadesc_type_t ignored,
+ xbt_cbps_t vars, void *data)
+{
+ long int *i = (long int *) data;
+ xbt_cbps_i_push(vars, (int) *i);
+}
+
+/** \brief Cb to push an unsigned long integer. Must be attached to the field you want to push
+ */
+void xbt_datadesc_cb_push_ulint(xbt_datadesc_type_t ignored,
+ xbt_cbps_t vars, void *data)
+{
+ unsigned long int *i = (unsigned long int *) data;
+ xbt_cbps_i_push(vars, (int) *i);
+}
+
+/* ************************************ */
+/* **** PUSHy multiplier callbacks **** */
+/* ************************************ */
+/** \brief Cb to push an integer as multiplier. Must be attached to the field you want to push */
+void xbt_datadesc_cb_push_int_mult(xbt_datadesc_type_t ignored,
+ xbt_cbps_t vars, void *data)
+{
+ int old = *(int *) data;
+ int new = xbt_cbps_i_pop(vars);
+ XBT_DEBUG("push %d x %d as a size", old, new);
+ xbt_cbps_i_push(vars, old * new);
+}
+
+/** \brief Cb to push an unsigned integer as multiplier. Must be attached to the field you want to push */
+void xbt_datadesc_cb_push_uint_mult(xbt_datadesc_type_t ignored,
+ xbt_cbps_t vars, void *data)
+{
+ unsigned int old = *(unsigned int *) data;
+ unsigned int new = xbt_cbps_i_pop(vars);
+
+ XBT_DEBUG("push %d x %d as a size", old, new);
+ xbt_cbps_i_push(vars, (int) (old * new));
+}
+
+/** \brief Cb to push an long integer as multiplier. Must be attached to the field you want to push
+ */
+void xbt_datadesc_cb_push_lint_mult(xbt_datadesc_type_t ignored,
+ xbt_cbps_t vars, void *data)
+{
+ long int i = *(long int *) data;
+ i *= xbt_cbps_i_pop(vars);
+ xbt_cbps_i_push(vars, (int) i);
+}
+
+/** \brief Cb to push an unsigned long integer as multiplier. Must be attached to the field you want to push
+ */
+void xbt_datadesc_cb_push_ulint_mult(xbt_datadesc_type_t ignored,
+ xbt_cbps_t vars, void *data)
+{
+ unsigned long int old = *(unsigned long int *) data;
+ unsigned long int new = xbt_cbps_i_pop(vars);
+
+ XBT_DEBUG("push %ld x %ld as a size", old, new);
+ xbt_cbps_i_push(vars, (int) (old * new));
+}
