/* 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 <simgrid/s4u/host.hpp>
+
#include "msg_private.h"
#include "xbt/log.h"
msg_file_priv_t file_priv = MSG_file_priv(fd);
sg_size_t read_size;
+ if (file_priv->size == 0.0) /* Nothing to read, return */
+ return 0.0;
+
/* Find the host where the file is physically located and read it */
msg_storage_t storage_src =(msg_storage_t) xbt_lib_get_elm_or_null(storage_lib, file_priv->storageId);
msg_storage_priv_t storage_priv_src = MSG_storage_priv(storage_src);
if(strcmp(storage_priv_src->hostname, MSG_host_get_name(MSG_host_self()))){
/* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", storage_priv_src->hostname, read_size);
- msg_host_t *m_host_list = NULL;
+ msg_host_t *m_host_list = nullptr;
m_host_list = (msg_host_t*) calloc(2, sizeof(msg_host_t));
m_host_list[0] = MSG_host_self();
m_host_list[1] = attached_host;
- double flops_amount[] = { 0, 0 };
+ double flops_amount[] = { 0, 0};
double bytes_amount[] = { 0, 0, (double)read_size, 0 };
msg_task_t task = MSG_parallel_task_create("file transfer for read", 2, m_host_list, flops_amount, bytes_amount,
- NULL);
+ nullptr);
msg_error_t transfer = MSG_parallel_task_execute(task);
MSG_task_destroy(task);
free(m_host_list);
{
msg_file_priv_t file_priv = MSG_file_priv(fd);
+ if (size == 0.0) /* Nothing to write, return */
+ return 0.0;
+
/* Find the host where the file is physically located (remote or local)*/
msg_storage_t storage_src =(msg_storage_t) xbt_lib_get_elm_or_null(storage_lib, file_priv->storageId);
msg_storage_priv_t storage_priv_src = MSG_storage_priv(storage_src);
if(strcmp(storage_priv_src->hostname, MSG_host_get_name(MSG_host_self()))){
/* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", storage_priv_src->hostname, size);
- msg_host_t *m_host_list = NULL;
+ msg_host_t *m_host_list = nullptr;
m_host_list = (msg_host_t*) calloc(2, sizeof(msg_host_t));
m_host_list[0] = MSG_host_self();
double bytes_amount[] = { 0, (double)size, 0, 0 };
msg_task_t task = MSG_parallel_task_create("file transfer for write", 2, m_host_list, flops_amount, bytes_amount,
- NULL);
+ nullptr);
msg_error_t transfer = MSG_parallel_task_execute(task);
MSG_task_destroy(task);
free(m_host_list);
}
const char *MSG_file_get_name(msg_file_t fd) {
- xbt_assert((fd != NULL), "Invalid parameters");
+ xbt_assert((fd != nullptr), "Invalid parameters");
msg_file_priv_t priv = MSG_file_priv(fd);
return priv->fullpath;
}
read_size = simcall_file_read(file_priv->simdata->smx_file, file_priv->size, attached_host);
/* Find the real host destination where the file will be physically stored */
- xbt_dict_cursor_t cursor = NULL;
- msg_storage_t storage_dest = NULL;
+ xbt_dict_cursor_t cursor = nullptr;
+ msg_storage_t storage_dest = nullptr;
msg_host_t host_dest;
size_t longest_prefix_length = 0;
XBT_DEBUG("Initiate data transfer of %llu bytes between %s and %s.", read_size, storage_priv_src->hostname,
host_name_dest);
- msg_host_t *m_host_list = NULL;
+ msg_host_t *m_host_list = nullptr;
m_host_list = (msg_host_t*) calloc(2, sizeof(msg_host_t));
m_host_list[0] = attached_host;
double bytes_amount[] = { 0, (double)read_size, 0, 0 };
msg_task_t task =
- MSG_parallel_task_create("file transfer for write", 2, m_host_list, flops_amount, bytes_amount, NULL);
+ MSG_parallel_task_create("file transfer for write", 2, m_host_list, flops_amount, bytes_amount, nullptr);
msg_error_t transfer = MSG_parallel_task_execute(task);
MSG_task_destroy(task);
free(m_host_list);
* This functions checks whether a storage is a valid pointer or not and return its name.
*/
const char *MSG_storage_get_name(msg_storage_t storage) {
- xbt_assert((storage != NULL), "Invalid parameters");
+ xbt_assert((storage != nullptr), "Invalid parameters");
return SIMIX_storage_get_name(storage);
}
*/
xbt_dict_t MSG_storage_get_properties(msg_storage_t storage)
{
- xbt_assert((storage != NULL), "Invalid parameters (storage is NULL)");
+ xbt_assert((storage != nullptr), "Invalid parameters (storage is nullptr)");
return (simcall_storage_get_properties(storage));
}
*
* \param storage a storage
* \param name a property name
- * \return value of a property (or NULL if property not set)
+ * \return value of a property (or nullptr if property not set)
*/
const char *MSG_storage_get_property_value(msg_storage_t storage, const char *name)
{
xbt_lib_cursor_t cursor;
char *key;
void **data;
- xbt_dynar_t res = xbt_dynar_new(sizeof(msg_storage_t),NULL);
+ xbt_dynar_t res = xbt_dynar_new(sizeof(msg_storage_t),nullptr);
xbt_lib_foreach(storage_lib, cursor, key, data) {
- if(xbt_lib_get_level(xbt_lib_get_elm_or_null(storage_lib, key), MSG_STORAGE_LEVEL) != NULL) {
+ if(xbt_lib_get_level(xbt_lib_get_elm_or_null(storage_lib, key), MSG_STORAGE_LEVEL) != nullptr) {
xbt_dictelm_t elm = xbt_dict_cursor_get_elm(cursor);
xbt_dynar_push(res, &elm);
}
*/
void *MSG_storage_get_data(msg_storage_t storage)
{
- xbt_assert((storage != NULL), "Invalid parameters");
+ xbt_assert((storage != nullptr), "Invalid parameters");
msg_storage_priv_t priv = MSG_storage_priv(storage);
return priv->data;
}
* This functions checks whether a storage is a valid pointer or not and return its name.
*/
const char *MSG_storage_get_host(msg_storage_t storage) {
- xbt_assert((storage != NULL), "Invalid parameters");
+ xbt_assert((storage != nullptr), "Invalid parameters");
msg_storage_priv_t priv = MSG_storage_priv(storage);
return priv->hostname;
}
