--- /dev/null
+/* ddt_exchange - send/recv data described */
+
+/* Copyright (c) 2004, 2005, 2006, 2007, 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 "datadesc_private.h"
+#include "xbt/socket.h" /* xbt_trp_send/recv */
+
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_ddt_exchange, xbt_ddt,
+ "Sending data over the network");
+const char *xbt_datadesc_cat_names[9] = {
+ "undefined",
+ "scalar", "struct", "union", "ref", "array", "ignored",
+ "invalid"
+};
+
+static xbt_datadesc_type_t int_type = NULL;
+static xbt_datadesc_type_t pointer_type = NULL;
+
+static XBT_INLINE void
+xbt_dd_send_int(xbt_socket_t sock, int *i, int stable)
+{
+
+ if (!int_type) {
+ int_type = xbt_datadesc_by_name("int");
+ xbt_assert(int_type);
+ }
+
+ XBT_DEBUG("send_int(%u)", *i);
+ xbt_trp_send(sock, (char *) i, int_type->size[GRAS_THISARCH], stable);
+}
+
+static XBT_INLINE void
+xbt_dd_recv_int(xbt_socket_t sock, int r_arch, int *i)
+{
+
+ if (!int_type) {
+ int_type = xbt_datadesc_by_name("int");
+ xbt_assert(int_type);
+ }
+
+ if (int_type->size[GRAS_THISARCH] >= int_type->size[r_arch]) {
+ xbt_trp_recv(sock, (char *) i, int_type->size[r_arch]);
+ if (r_arch != GRAS_THISARCH)
+ xbt_dd_convert_elm(int_type, 1, r_arch, i, i);
+ } else {
+ void *ptr = xbt_malloc(int_type->size[r_arch]);
+
+ xbt_trp_recv(sock, (char *) ptr, int_type->size[r_arch]);
+ if (r_arch != GRAS_THISARCH)
+ xbt_dd_convert_elm(int_type, 1, r_arch, ptr, i);
+ free(ptr);
+ }
+ XBT_DEBUG("recv_int(%u)", *i);
+}
+
+/*
+ * Note: here we suppose that the remote NULL is a sequence
+ * of 'length' bytes set to 0.
+ * FIXME: Check in configure?
+ */
+static XBT_INLINE int xbt_dd_is_r_null(char **r_ptr, long int length)
+{
+ int i;
+
+ for (i = 0; i < length; i++) {
+ if (((unsigned char *) r_ptr)[i]) {
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+static XBT_INLINE void xbt_dd_alloc_ref(xbt_dict_t refs, long int size, char **r_ref, long int r_len, /* pointer_type->size[r_arch] */
+ char **l_ref, int detect_cycle)
+{
+ char *l_data = NULL;
+
+ xbt_assert(size > 0, "Cannot allocate %ld bytes!", size);
+ l_data = xbt_malloc((size_t) size);
+
+ *l_ref = l_data;
+ XBT_DEBUG
+ ("alloc_ref: l_data=%p, &l_data=%p; r_ref=%p; *r_ref=%p, r_len=%ld",
+ (void *) l_data, (void *) &l_data, (void *) r_ref,
+ (void *) (r_ref ? *r_ref : NULL), r_len);
+ if (detect_cycle && r_ref && !xbt_dd_is_r_null(r_ref, r_len)) {
+ void *ptr = xbt_malloc(sizeof(void *));
+
+ memcpy(ptr, l_ref, sizeof(void *));
+
+ XBT_DEBUG("Insert l_ref=%p under r_ref=%p", *(void **) ptr,
+ *(void **) r_ref);
+
+ if (detect_cycle)
+ xbt_dict_set_ext(refs, (const char *) r_ref, r_len, ptr, NULL);
+ }
+}
+
+static int
+xbt_datadesc_memcpy_rec(xbt_cbps_t state,
+ xbt_dict_t refs,
+ xbt_datadesc_type_t type,
+ char *src, char *dst, int subsize,
+ int detect_cycle)
+{
+
+
+ unsigned int cpt;
+ xbt_datadesc_type_t sub_type; /* type on which we recurse */
+ int count = 0;
+
+ XBT_VERB("Copy a %s (%s) from %p to %p (local sizeof=%ld)",
+ type->name, xbt_datadesc_cat_names[type->category_code],
+ src, dst, type->size[GRAS_THISARCH]);
+
+ if (type->send) {
+ type->send(type, state, src);
+ }
+
+ switch (type->category_code) {
+ case e_xbt_datadesc_type_cat_scalar:
+ memcpy(dst, src, type->size[GRAS_THISARCH]);
+ count += type->size[GRAS_THISARCH];
+ break;
+
+ case e_xbt_datadesc_type_cat_struct:{
+ xbt_dd_cat_struct_t struct_data;
+ xbt_dd_cat_field_t field;
+ char *field_src;
+ char *field_dst;
+
+ struct_data = type->category.struct_data;
+ xbt_assert(struct_data.closed,
+ "Please call xbt_datadesc_declare_struct_close on %s before copying it",
+ type->name);
+ XBT_VERB(">> Copy all fields of the structure %s", type->name);
+ xbt_dynar_foreach(struct_data.fields, cpt, field) {
+ field_src = src + field->offset[GRAS_THISARCH];
+ field_dst = dst + field->offset[GRAS_THISARCH];
+
+ sub_type = field->type;
+
+ if (field->send)
+ field->send(type, state, field_src);
+
+ XBT_DEBUG("Copy field %s", field->name);
+ count +=
+ xbt_datadesc_memcpy_rec(state, refs, sub_type, field_src,
+ field_dst, 0, detect_cycle
+ || sub_type->cycle);
+
+ if (XBT_LOG_ISENABLED(xbt_ddt_exchange, xbt_log_priority_verbose)) {
+ if (sub_type == xbt_datadesc_by_name("unsigned int")) {
+ XBT_VERB("Copied value for field '%s': %d (type: unsigned int)",
+ field->name, *(unsigned int *) field_dst);
+ } else if (sub_type == xbt_datadesc_by_name("int")) {
+ XBT_VERB("Copied value for field '%s': %d (type: int)",
+ field->name, *(int *) field_dst);
+
+ } else if (sub_type ==
+ xbt_datadesc_by_name("unsigned long int")) {
+ XBT_VERB
+ ("Copied value for field '%s': %ld (type: unsigned long int)",
+ field->name, *(unsigned long int *) field_dst);
+ } else if (sub_type == xbt_datadesc_by_name("long int")) {
+ XBT_VERB("Copied value for field '%s': %ld (type: long int)",
+ field->name, *(long int *) field_dst);
+
+ } else if (sub_type == xbt_datadesc_by_name("string")) {
+ XBT_VERB("Copied value for field '%s': '%s' (type: string)",
+ field->name, *(char **) field_dst);
+ } else {
+ XBT_VERB("Copied a value for field '%s' (type not scalar?)",
+ field->name);
+ }
+ }
+
+ }
+ XBT_VERB("<< Copied all fields of the structure %s", type->name);
+
+ break;
+ }
+
+ case e_xbt_datadesc_type_cat_union:{
+ xbt_dd_cat_union_t union_data;
+ xbt_dd_cat_field_t field = NULL;
+ unsigned int field_num;
+
+ union_data = type->category.union_data;
+
+ xbt_assert(union_data.closed,
+ "Please call xbt_datadesc_declare_union_close on %s before copying it",
+ type->name);
+ /* retrieve the field number */
+ field_num = union_data.selector(type, state, src);
+
+ xbt_assert(field_num > 0,
+ "union field selector of %s gave a negative value",
+ type->name);
+
+ xbt_assert(field_num < xbt_dynar_length(union_data.fields),
+ "union field selector of %s returned %d but there is only %lu fields",
+ type->name, field_num,
+ xbt_dynar_length(union_data.fields));
+
+ /* Copy the content */
+ field =
+ xbt_dynar_get_as(union_data.fields, field_num,
+ xbt_dd_cat_field_t);
+ sub_type = field->type;
+
+ if (field->send)
+ field->send(type, state, src);
+
+ count += xbt_datadesc_memcpy_rec(state, refs, sub_type, src, dst, 0,
+ detect_cycle || sub_type->cycle);
+
+ break;
+ }
+
+ case e_xbt_datadesc_type_cat_ref:{
+ xbt_dd_cat_ref_t ref_data;
+ char **o_ref = NULL;
+ char **n_ref = NULL;
+ int reference_is_to_cpy;
+
+ ref_data = type->category.ref_data;
+
+ /* Detect the referenced type */
+ sub_type = ref_data.type;
+ if (sub_type == NULL) {
+ sub_type = ref_data.selector(type, state, src);
+ }
+
+ /* Send the pointed data only if not already sent */
+ if (*(void **) src == NULL) {
+ XBT_VERB("Not copying NULL referenced data");
+ *(void **) dst = NULL;
+ break;
+ }
+ o_ref = (char **) src;
+
+ reference_is_to_cpy = 1;
+ if (detect_cycle &&
+ (n_ref =
+ xbt_dict_get_or_null_ext(refs, (char *) o_ref,
+ sizeof(char *)))) {
+ /* already known, no need to copy it */
+ //XBT_INFO("Cycle detected");
+ reference_is_to_cpy = 0;
+ }
+
+ if (reference_is_to_cpy) {
+ int subsubcount = -1;
+ void *l_referenced = NULL;
+ XBT_VERB("Copy a ref to '%s' referenced at %p", sub_type->name,
+ (void *) *o_ref);
+
+ if (!pointer_type) {
+ pointer_type = xbt_datadesc_by_name("data pointer");
+ xbt_assert(pointer_type);
+ }
+
+ if (sub_type->category_code == e_xbt_datadesc_type_cat_array) {
+ /* Damn. Reference to a dynamic array. Allocating the space for it is more complicated */
+ xbt_dd_cat_array_t array_data = sub_type->category.array_data;
+ xbt_datadesc_type_t subsub_type;
+
+ subsub_type = array_data.type;
+ subsubcount = array_data.fixed_size;
+ if (subsubcount == -1)
+ subsubcount =
+ array_data.dynamic_size(subsub_type, state, *o_ref);
+
+ if (subsubcount != 0)
+ xbt_dd_alloc_ref(refs,
+ subsub_type->size[GRAS_THISARCH] *
+ subsubcount, o_ref,
+ pointer_type->size[GRAS_THISARCH],
+ (char **) &l_referenced, detect_cycle);
+ } else {
+ xbt_dd_alloc_ref(refs, sub_type->size[GRAS_THISARCH],
+ o_ref, pointer_type->size[GRAS_THISARCH],
+ (char **) &l_referenced, detect_cycle);
+ }
+
+ count += xbt_datadesc_memcpy_rec(state, refs, sub_type,
+ *o_ref, (char *) l_referenced,
+ subsubcount, detect_cycle
+ || sub_type->cycle);
+
+ *(void **) dst = l_referenced;
+ XBT_VERB("'%s' previously referenced at %p now at %p",
+ sub_type->name, *(void **) o_ref, l_referenced);
+
+ } else {
+ XBT_VERB
+ ("NOT copying data previously referenced @%p (already done, @%p now)",
+ *(void **) o_ref, *(void **) n_ref);
+
+ *(void **) dst = *n_ref;
+
+ }
+ break;
+ }
+
+ case e_xbt_datadesc_type_cat_array:{
+ xbt_dd_cat_array_t array_data;
+ unsigned long int array_count;
+ char *src_ptr = src;
+ char *dst_ptr = dst;
+ long int elm_size;
+
+ array_data = type->category.array_data;
+
+ /* determine and send the element count */
+ array_count = array_data.fixed_size;
+ if (array_count == -1)
+ array_count = subsize;
+ if (array_count == -1) {
+ array_count = array_data.dynamic_size(type, state, src);
+ xbt_assert(array_count >= 0,
+ "Invalid (negative) array size for type %s",
+ type->name);
+ }
+
+ /* send the content */
+ sub_type = array_data.type;
+ elm_size = sub_type->aligned_size[GRAS_THISARCH];
+ if (sub_type->category_code == e_xbt_datadesc_type_cat_scalar) {
+ XBT_VERB("Array of %ld scalars, copy it in one shot", array_count);
+ memcpy(dst, src,
+ sub_type->aligned_size[GRAS_THISARCH] * array_count);
+ count += sub_type->aligned_size[GRAS_THISARCH] * array_count;
+ } else if (sub_type->category_code == e_xbt_datadesc_type_cat_array
+ && sub_type->category.array_data.fixed_size > 0
+ && sub_type->category.array_data.type->category_code ==
+ e_xbt_datadesc_type_cat_scalar) {
+
+ XBT_VERB("Array of %ld fixed array of scalars, copy it in one shot",
+ array_count);
+ memcpy(dst, src,
+ sub_type->category.array_data.
+ type->aligned_size[GRAS_THISARCH]
+ * array_count * sub_type->category.array_data.fixed_size);
+ count +=
+ sub_type->category.array_data.type->aligned_size[GRAS_THISARCH]
+ * array_count * sub_type->category.array_data.fixed_size;
+
+ } else {
+ XBT_VERB("Array of %ld stuff, copy it in one after the other",
+ array_count);
+ for (cpt = 0; cpt < array_count; cpt++) {
+ XBT_VERB("Copy the %dth stuff out of %ld", cpt, array_count);
+ count +=
+ xbt_datadesc_memcpy_rec(state, refs, sub_type, src_ptr,
+ dst_ptr, 0, detect_cycle
+ || sub_type->cycle);
+ src_ptr += elm_size;
+ dst_ptr += elm_size;
+ }
+ }
+ break;
+ }
+
+ default:
+ xbt_die("Invalid type");
+ }
+
+ return count;
+}
+
+/**
+ * xbt_datadesc_memcpy:
+ *
+ * Copy the data pointed by src and described by type
+ * to a new location, and store a pointer to it in dst.
+ *
+ */
+int xbt_datadesc_memcpy(xbt_datadesc_type_t type, void *src, void *dst)
+{
+ static xbt_cbps_t state = NULL;
+ static xbt_dict_t refs = NULL; /* all references already sent */
+ int size = 0;
+
+ xbt_assert(type, "called with NULL type descriptor");
+
+ XBT_DEBUG("Memcopy a %s from %p to %p", xbt_datadesc_get_name(type), src,
+ dst);
+ if (!state) {
+ state = xbt_cbps_new();
+ refs = xbt_dict_new_homogeneous(xbt_free_f);
+ }
+
+ TRY {
+ size =
+ xbt_datadesc_memcpy_rec(state, refs, type, (char *) src,
+ (char *) dst, 0, type->cycle);
+ }
+ TRY_CLEANUP {
+ xbt_dict_reset(refs);
+ xbt_cbps_reset(state);
+ }
+ CATCH_ANONYMOUS {
+ RETHROW;
+ }
+ return size;
+}
+
+/***
+ *** Direct use functions
+ ***/
+
+static void
+xbt_datadesc_send_rec(xbt_socket_t sock,
+ xbt_cbps_t state,
+ xbt_dict_t refs,
+ xbt_datadesc_type_t type,
+ char *data, int detect_cycle)
+{
+
+ unsigned int cpt;
+ xbt_datadesc_type_t sub_type; /* type on which we recurse */
+
+ XBT_VERB("Send a %s (%s)",
+ type->name, xbt_datadesc_cat_names[type->category_code]);
+
+ if (!strcmp(type->name, "string"))
+ XBT_VERB("value: '%s'", *(char **) data);
+
+ if (type->send) {
+ type->send(type, state, data);
+ XBT_DEBUG("Run the emission callback");
+ }
+
+ switch (type->category_code) {
+ case e_xbt_datadesc_type_cat_scalar:
+ xbt_trp_send(sock, data, type->size[GRAS_THISARCH], 1);
+ break;
+
+ case e_xbt_datadesc_type_cat_struct:{
+ xbt_dd_cat_struct_t struct_data;
+ xbt_dd_cat_field_t field;
+ char *field_data;
+
+ struct_data = type->category.struct_data;
+ xbt_assert(struct_data.closed,
+ "Please call xbt_datadesc_declare_struct_close on %s before sending it",
+ type->name);
+ XBT_VERB(">> Send all fields of the structure %s", type->name);
+ xbt_dynar_foreach(struct_data.fields, cpt, field) {
+ field_data = data;
+ field_data += field->offset[GRAS_THISARCH];
+
+ sub_type = field->type;
+
+ if (field->send) {
+ XBT_DEBUG("Run the emission callback of field %s", field->name);
+ field->send(type, state, field_data);
+ }
+
+ XBT_VERB("Send field %s", field->name);
+ xbt_datadesc_send_rec(sock, state, refs, sub_type, field_data,
+ detect_cycle || sub_type->cycle);
+
+ }
+ XBT_VERB("<< Sent all fields of the structure %s", type->name);
+
+ break;
+ }
+
+ case e_xbt_datadesc_type_cat_union:{
+ xbt_dd_cat_union_t union_data;
+ xbt_dd_cat_field_t field = NULL;
+ int field_num;
+
+ union_data = type->category.union_data;
+
+ xbt_assert(union_data.closed,
+ "Please call xbt_datadesc_declare_union_close on %s before sending it",
+ type->name);
+ /* retrieve the field number */
+ field_num = union_data.selector(type, state, data);
+
+ xbt_assert(field_num > 0,
+ "union field selector of %s gave a negative value",
+ type->name);
+
+ xbt_assert(field_num < xbt_dynar_length(union_data.fields),
+ "union field selector of %s returned %d but there is only %lu fields",
+ type->name, field_num,
+ xbt_dynar_length(union_data.fields));
+
+ /* Send the field number */
+ xbt_dd_send_int(sock, &field_num, 0 /* not stable */ );
+
+ /* Send the content */
+ field =
+ xbt_dynar_get_as(union_data.fields, field_num,
+ xbt_dd_cat_field_t);
+ sub_type = field->type;
+
+ if (field->send)
+ field->send(type, state, data);
+
+ xbt_datadesc_send_rec(sock, state, refs, sub_type, data,
+ detect_cycle || sub_type->cycle);
+
+ break;
+ }
+
+ case e_xbt_datadesc_type_cat_ref:{
+ xbt_dd_cat_ref_t ref_data;
+ void **ref = (void **) data;
+ int reference_is_to_send;
+
+ ref_data = type->category.ref_data;
+
+ /* Detect the referenced type and send it to peer if needed */
+ sub_type = ref_data.type;
+ if (sub_type == NULL) {
+ sub_type = ref_data.selector(type, state, data);
+ xbt_dd_send_int(sock, &(sub_type->code), 1 /*stable */ );
+ }
+
+ /* Send the actual value of the pointer for cycle handling */
+ if (!pointer_type) {
+ pointer_type = xbt_datadesc_by_name("data pointer");
+ xbt_assert(pointer_type);
+ }
+
+ xbt_trp_send(sock, (char *) data,
+ pointer_type->size[GRAS_THISARCH], 1 /*stable */ );
+
+ /* Send the pointed data only if not already sent */
+ if (*(void **) data == NULL) {
+ XBT_VERB("Not sending NULL referenced data");
+ break;
+ }
+
+ reference_is_to_send = 1;
+ /* return ignored. Just checking whether it's known or not */
+ if (detect_cycle
+ && xbt_dict_get_or_null_ext(refs, (char *) ref,
+ sizeof(char *))) {
+ //XBT_INFO("Cycle detected");
+ reference_is_to_send = 0;
+ }
+
+ if (reference_is_to_send) {
+ XBT_VERB("Sending data referenced at %p", (void *) *ref);
+ if (detect_cycle)
+ xbt_dict_set_ext(refs, (char *) ref, sizeof(void *), ref, NULL);
+ xbt_datadesc_send_rec(sock, state, refs, sub_type, *ref,
+ detect_cycle || sub_type->cycle);
+
+ } else {
+ XBT_VERB("Not sending data referenced at %p (already done)",
+ (void *) *ref);
+ }
+
+ break;
+ }
+
+ case e_xbt_datadesc_type_cat_array:{
+ xbt_dd_cat_array_t array_data;
+ int count;
+ char *ptr = data;
+ long int elm_size;
+
+ array_data = type->category.array_data;
+
+ /* determine and send the element count */
+ count = array_data.fixed_size;
+ if (count == -1) {
+ count = array_data.dynamic_size(type, state, data);
+ xbt_assert(count >= 0,
+ "Invalid (negative) array size for type %s",
+ type->name);
+ xbt_dd_send_int(sock, &count, 0 /*non-stable */ );
+ }
+
+ /* send the content */
+ sub_type = array_data.type;
+ elm_size = sub_type->aligned_size[GRAS_THISARCH];
+ if (sub_type->category_code == e_xbt_datadesc_type_cat_scalar) {
+ XBT_VERB("Array of %d scalars, send it in one shot", count);
+ xbt_trp_send(sock, data,
+ sub_type->aligned_size[GRAS_THISARCH] * count,
+ 0 /* not stable */ );
+ } else if (sub_type->category_code == e_xbt_datadesc_type_cat_array
+ && sub_type->category.array_data.fixed_size > 0
+ && sub_type->category.array_data.type->category_code ==
+ e_xbt_datadesc_type_cat_scalar) {
+
+ XBT_VERB("Array of %d fixed array of scalars, send it in one shot",
+ count);
+ xbt_trp_send(sock, data,
+ sub_type->category.array_data.
+ type->aligned_size[GRAS_THISARCH]
+ * count * sub_type->category.array_data.fixed_size,
+ 0 /* not stable */ );
+
+ } else {
+ for (cpt = 0; cpt < count; cpt++) {
+ xbt_datadesc_send_rec(sock, state, refs, sub_type, ptr,
+ detect_cycle || sub_type->cycle);
+ ptr += elm_size;
+ }
+ }
+ break;
+ }
+
+ default:
+ xbt_die("Invalid type");
+ }
+}
+
+/**
+ * xbt_datadesc_send:
+ *
+ * Copy the data pointed by src and described by type to the socket
+ *
+ */
+void xbt_datadesc_send(xbt_socket_t sock,
+ xbt_datadesc_type_t type, void *src)
+{
+ static xbt_cbps_t state = NULL;
+ static xbt_dict_t refs = NULL; /* all references already sent */
+
+ xbt_assert(type, "called with NULL type descriptor");
+
+ if (!state) {
+ state = xbt_cbps_new();
+ refs = xbt_dict_new_homogeneous(NULL);
+ }
+
+ TRY {
+ xbt_datadesc_send_rec(sock, state, refs, type, (char *) src,
+ type->cycle);
+ }
+ TRY_CLEANUP {
+ xbt_dict_reset(refs);
+ xbt_cbps_reset(state);
+ }
+ CATCH_ANONYMOUS {
+ RETHROW;
+ }
+}
+
+/**
+ * xbt_datadesc_recv_rec:
+ *
+ * Do the data reception job recursively.
+ *
+ * subsize used only to deal with vicious case of reference to dynamic array.
+ * This size is needed at the reference reception level (to allocate enough
+ * space) and at the array reception level (to fill enough room).
+ *
+ * Having this size passed as an argument of the recursive function is a crude
+ * hack, but I was told that working code is sometimes better than neat one ;)
+ */
+static void
+xbt_datadesc_recv_rec(xbt_socket_t sock,
+ xbt_cbps_t state,
+ xbt_dict_t refs,
+ xbt_datadesc_type_t type,
+ int r_arch,
+ char **r_data,
+ long int r_lgr,
+ char *l_data, int subsize, int detect_cycle)
+{
+
+ unsigned int cpt;
+ xbt_datadesc_type_t sub_type;
+
+ XBT_VERB("Recv a %s @%p", type->name, (void *) l_data);
+ xbt_assert(l_data);
+
+ switch (type->category_code) {
+ case e_xbt_datadesc_type_cat_scalar:
+ if (type->size[GRAS_THISARCH] == type->size[r_arch]) {
+ xbt_trp_recv(sock, (char *) l_data, type->size[r_arch]);
+ if (r_arch != GRAS_THISARCH)
+ xbt_dd_convert_elm(type, 1, r_arch, l_data, l_data);
+ } else {
+ void *ptr = xbt_malloc(type->size[r_arch]);
+
+ xbt_trp_recv(sock, (char *) ptr, type->size[r_arch]);
+ if (r_arch != GRAS_THISARCH)
+ xbt_dd_convert_elm(type, 1, r_arch, ptr, l_data);
+ free(ptr);
+ }
+ break;
+
+ case e_xbt_datadesc_type_cat_struct:{
+ xbt_dd_cat_struct_t struct_data;
+ xbt_dd_cat_field_t field;
+
+ struct_data = type->category.struct_data;
+
+ xbt_assert(struct_data.closed,
+ "Please call xbt_datadesc_declare_struct_close on %s before receiving it",
+ type->name);
+ XBT_VERB(">> Receive all fields of the structure %s", type->name);
+ xbt_dynar_foreach(struct_data.fields, cpt, field) {
+ char *field_data = l_data + field->offset[GRAS_THISARCH];
+
+ sub_type = field->type;
+
+ xbt_datadesc_recv_rec(sock, state, refs, sub_type,
+ r_arch, NULL, 0,
+ field_data, -1,
+ detect_cycle || sub_type->cycle);
+
+ if (field->recv) {
+ XBT_DEBUG("Run the reception callback of field %s", field->name);
+ field->recv(type, state, (void *) l_data);
+ }
+
+ }
+ XBT_VERB("<< Received all fields of the structure %s", type->name);
+
+ break;
+ }
+
+ case e_xbt_datadesc_type_cat_union:{
+ xbt_dd_cat_union_t union_data;
+ xbt_dd_cat_field_t field = NULL;
+ int field_num;
+
+ union_data = type->category.union_data;
+
+ xbt_assert(union_data.closed,
+ "Please call xbt_datadesc_declare_union_close on %s before receiving it",
+ type->name);
+ /* retrieve the field number */
+ xbt_dd_recv_int(sock, r_arch, &field_num);
+ if (field_num < 0)
+ THROWF(mismatch_error, 0,
+ "Received union field for %s is negative", type->name);
+ if (field_num > xbt_dynar_length(union_data.fields))
+ THROWF(mismatch_error, 0,
+ "Received union field for %s is said to be #%d but there is only %lu fields",
+ type->name, field_num, xbt_dynar_length(union_data.fields));
+
+ /* Recv the content */
+ field =
+ xbt_dynar_get_as(union_data.fields, field_num,
+ xbt_dd_cat_field_t);
+ sub_type = field->type;
+
+ xbt_datadesc_recv_rec(sock, state, refs, sub_type,
+ r_arch, NULL, 0,
+ l_data, -1, detect_cycle || sub_type->cycle);
+ if (field->recv)
+ field->recv(type, state, l_data);
+
+ break;
+ }
+
+ case e_xbt_datadesc_type_cat_ref:{
+ char **r_ref = NULL;
+ char **l_ref = NULL;
+ xbt_dd_cat_ref_t ref_data;
+ int reference_is_to_recv = 0;
+
+ ref_data = type->category.ref_data;
+
+ /* Get the referenced type locally or from peer */
+ sub_type = ref_data.type;
+ if (sub_type == NULL) {
+ int ref_code;
+ xbt_dd_recv_int(sock, r_arch, &ref_code);
+ sub_type = xbt_datadesc_by_id(ref_code);
+ }
+
+ /* Get the actual value of the pointer for cycle handling */
+ if (!pointer_type) {
+ pointer_type = xbt_datadesc_by_name("data pointer");
+ xbt_assert(pointer_type);
+ }
+
+ r_ref = xbt_malloc(pointer_type->size[r_arch]);
+
+ xbt_trp_recv(sock, (char *) r_ref, pointer_type->size[r_arch]);
+
+ /* Receive the pointed data only if not already sent */
+ if (xbt_dd_is_r_null(r_ref, pointer_type->size[r_arch])) {
+ XBT_VERB("Not receiving data remotely referenced @%p since it's NULL",
+ *(void **) r_ref);
+ *(void **) l_data = NULL;
+ free(r_ref);
+ break;
+ }
+
+ reference_is_to_recv = 1;
+ if (detect_cycle && (l_ref =
+ xbt_dict_get_or_null_ext(refs, (char *) r_ref,
+ pointer_type->size
+ [r_arch]))) {
+ reference_is_to_recv = 0;
+ //XBT_INFO("Cycle detected");
+ }
+
+ if (reference_is_to_recv) {
+ int subsubcount = -1;
+ void *l_referenced = NULL;
+
+ XBT_VERB("Receiving a ref to '%s', remotely @%p",
+ sub_type->name, *(void **) r_ref);
+ if (sub_type->category_code == e_xbt_datadesc_type_cat_array) {
+ /* Damn. Reference to a dynamic array. Allocating the space for it is more complicated */
+ xbt_dd_cat_array_t array_data = sub_type->category.array_data;
+ xbt_datadesc_type_t subsub_type;
+
+ subsubcount = array_data.fixed_size;
+ if (subsubcount == -1)
+ xbt_dd_recv_int(sock, r_arch, &subsubcount);
+
+ subsub_type = array_data.type;
+
+ if (subsubcount != 0)
+ xbt_dd_alloc_ref(refs,
+ subsub_type->size[GRAS_THISARCH] *
+ subsubcount, r_ref,
+ pointer_type->size[r_arch],
+ (char **) &l_referenced, detect_cycle);
+ else
+ l_referenced = NULL;
+ } else {
+ xbt_dd_alloc_ref(refs, sub_type->size[GRAS_THISARCH],
+ r_ref, pointer_type->size[r_arch],
+ (char **) &l_referenced, detect_cycle);
+ }
+
+ if (l_referenced != NULL)
+ xbt_datadesc_recv_rec(sock, state, refs, sub_type,
+ r_arch, r_ref, pointer_type->size[r_arch],
+ (char *) l_referenced, subsubcount,
+ detect_cycle || sub_type->cycle);
+
+ *(void **) l_data = l_referenced;
+ XBT_VERB("'%s' remotely referenced at %p locally at %p",
+ sub_type->name, *(void **) r_ref, l_referenced);
+
+ } else {
+ XBT_VERB
+ ("NOT receiving data remotely referenced @%p (already done, @%p here)",
+ *(void **) r_ref, *(void **) l_ref);
+
+ *(void **) l_data = *l_ref;
+
+ }
+ free(r_ref);
+ break;
+ }
+
+ case e_xbt_datadesc_type_cat_array:{
+ xbt_dd_cat_array_t array_data;
+ int count;
+ char *ptr;
+ long int elm_size;
+
+ array_data = type->category.array_data;
+ /* determine element count locally, or from caller, or from peer */
+ count = array_data.fixed_size;
+ if (count == -1)
+ count = subsize;
+ if (count == -1)
+ xbt_dd_recv_int(sock, r_arch, &count);
+ if (count == -1)
+ THROWF(mismatch_error, 0,
+ "Invalid (=-1) array size for type %s", type->name);
+
+ /* receive the content */
+ sub_type = array_data.type;
+ if (sub_type->category_code == e_xbt_datadesc_type_cat_scalar) {
+ XBT_VERB("Array of %d scalars, get it in one shoot", count);
+ if (sub_type->aligned_size[GRAS_THISARCH] >=
+ sub_type->aligned_size[r_arch]) {
+ xbt_trp_recv(sock, (char *) l_data,
+ sub_type->aligned_size[r_arch] * count);
+ if (r_arch != GRAS_THISARCH)
+ xbt_dd_convert_elm(sub_type, count, r_arch, l_data, l_data);
+ } else {
+ ptr = xbt_malloc(sub_type->aligned_size[r_arch] * count);
+
+ xbt_trp_recv(sock, (char *) ptr,
+ sub_type->size[r_arch] * count);
+ if (r_arch != GRAS_THISARCH)
+ xbt_dd_convert_elm(sub_type, count, r_arch, ptr, l_data);
+ free(ptr);
+ }
+ } else if (sub_type->category_code == e_xbt_datadesc_type_cat_array
+ && sub_type->category.array_data.fixed_size >= 0
+ && sub_type->category.array_data.type->category_code ==
+ e_xbt_datadesc_type_cat_scalar) {
+ xbt_datadesc_type_t subsub_type;
+ array_data = sub_type->category.array_data;
+ subsub_type = array_data.type;
+
+ XBT_VERB("Array of %d fixed array of scalars, get it in one shot",
+ count);
+ if (subsub_type->aligned_size[GRAS_THISARCH] >=
+ subsub_type->aligned_size[r_arch]) {
+ xbt_trp_recv(sock, (char *) l_data,
+ subsub_type->aligned_size[r_arch] * count *
+ array_data.fixed_size);
+ if (r_arch != GRAS_THISARCH)
+ xbt_dd_convert_elm(subsub_type, count * array_data.fixed_size,
+ r_arch, l_data, l_data);
+ } else {
+ ptr =
+ xbt_malloc(subsub_type->aligned_size[r_arch] * count *
+ array_data.fixed_size);
+
+ xbt_trp_recv(sock, (char *) ptr,
+ subsub_type->size[r_arch] * count *
+ array_data.fixed_size);
+ if (r_arch != GRAS_THISARCH)
+ xbt_dd_convert_elm(subsub_type, count * array_data.fixed_size,
+ r_arch, ptr, l_data);
+ free(ptr);
+ }
+
+
+ } else {
+ /* not scalar content, get it recursively (may contain pointers) */
+ elm_size = sub_type->aligned_size[GRAS_THISARCH];
+ XBT_VERB("Receive a %d-long array of %s", count, sub_type->name);
+
+ ptr = l_data;
+ for (cpt = 0; cpt < count; cpt++) {
+ xbt_datadesc_recv_rec(sock, state, refs, sub_type,
+ r_arch, NULL, 0, ptr, -1,
+ detect_cycle || sub_type->cycle);
+
+ ptr += elm_size;
+ }
+ }
+ break;
+ }
+
+ default:
+ xbt_die("Invalid type");
+ }
+
+ if (type->recv)
+ type->recv(type, state, l_data);
+
+ if (!strcmp(type->name, "string"))
+ XBT_VERB("value: '%s'", *(char **) l_data);
+
+}
+
+/**
+ * xbt_datadesc_recv:
+ *
+ * Get an instance of the datatype described by @type from the @socket,
+ * and store a pointer to it in @dst
+ *
+ */
+void
+xbt_datadesc_recv(xbt_socket_t sock,
+ xbt_datadesc_type_t type, int r_arch, void *dst)
+{
+ static xbt_cbps_t state = NULL; /* callback persistent state */
+ static xbt_dict_t refs = NULL; /* all references already sent */
+
+ if (!state) {
+ state = xbt_cbps_new();
+ refs = xbt_dict_new_homogeneous(xbt_free_f);
+ }
+
+ xbt_assert(type, "called with NULL type descriptor");
+ TRY {
+ xbt_datadesc_recv_rec(sock, state, refs, type,
+ r_arch, NULL, 0, (char *) dst, -1, type->cycle);
+ }
+ TRY_CLEANUP {
+ xbt_dict_reset(refs);
+ xbt_cbps_reset(state);
+ }
+ CATCH_ANONYMOUS {
+ RETHROW;
+ }
+}
