/* 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"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_io, msg, "Logging specific to MSG (io)");
-/** @addtogroup msg_file_management
+/** @addtogroup msg_file
* (#msg_file_t) and the functions for managing it.
*
* \see #msg_file_t
xbt_dynar_free_container(&info);
}
-/** \ingroup msg_file_management
+/** \ingroup msg_file
*
* \brief Set the user data of a #msg_file_t.
*
return MSG_OK;
}
-/** \ingroup msg_file_management
+/** \ingroup msg_file
*
* \brief Return the user data of a #msg_file_t.
*
return priv->data;
}
-/** \ingroup msg_file_management
+/** \ingroup msg_file
* \brief Display information related to a file descriptor
*
* \param fd is a the file descriptor
priv->content_type, priv->desc_id);
}
-/** \ingroup msg_file_management
+/** \ingroup msg_file
* \brief Read a file (local or remote)
*
* \param size of the file to read
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);
return read_size;
}
-/** \ingroup msg_file_management
+/** \ingroup msg_file
* \brief Write into a file (local or remote)
*
* \param size of the file to write
sg_size_t MSG_file_write(msg_file_t fd, sg_size_t size)
{
msg_file_priv_t file_priv = MSG_file_priv(fd);
- sg_size_t write_size, offset;
+
+ 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);
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);
}
}
/* Write file on local or remote host */
- offset = simcall_file_tell(file_priv->simdata->smx_file);
- write_size = simcall_file_write(file_priv->simdata->smx_file, size, attached_host);
+ sg_size_t offset = simcall_file_tell(file_priv->simdata->smx_file);
+ sg_size_t write_size = simcall_file_write(file_priv->simdata->smx_file, size, attached_host);
file_priv->size = offset+write_size;
return write_size;
}
-/** \ingroup msg_file_management
+/** \ingroup msg_file
* \brief Opens the file whose name is the string pointed to by path
*
* \param fullpath is the file location on the storage
return fd;
}
-/** \ingroup msg_file_management
+/** \ingroup msg_file
* \brief Close the file
*
* \param fd is the file to close
return res;
}
-/** \ingroup msg_file_management
+/** \ingroup msg_file
* \brief Unlink the file pointed by fd
*
* \param fd is the file descriptor (#msg_file_t)
return (msg_error_t) res;
}
-/** \ingroup msg_file_management
+/** \ingroup msg_file
* \brief Return the size of a file
*
* \param fd is the file descriptor (#msg_file_t)
}
/**
- * \ingroup msg_file_management
+ * \ingroup msg_file
* \brief Set the file position indicator in the msg_file_t by adding offset bytes
* to the position specified by origin (either SEEK_SET, SEEK_CUR, or SEEK_END).
*
}
/**
- * \ingroup msg_file_management
+ * \ingroup msg_file
* \brief Returns the current value of the position indicator of the file
*
* \param fd : file object that identifies the stream
}
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;
}
/**
- * \ingroup msg_file_management
+ * \ingroup msg_file
* \brief Move a file to another location on the *same mount point*.
*
*/
}
/**
- * \ingroup msg_file_management
+ * \ingroup msg_file
* \brief Copy a file to another location on a remote host.
* \param file : the file to move
* \param host : the remote host where the file has to be copied
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;
- char *mount_name, *storage_name, *file_mount_name, *host_name_dest;
- 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_dict_t storage_list = host->mountedStoragesAsDict();
+ char *mount_name, *storage_name;
xbt_dict_foreach(storage_list,cursor,mount_name,storage_name){
- file_mount_name = (char *) xbt_malloc ((strlen(mount_name)+1));
+ char* file_mount_name = (char *) xbt_malloc ((strlen(mount_name)+1));
strncpy(file_mount_name,fullpath,strlen(mount_name)+1);
file_mount_name[strlen(mount_name)] = '\0';
}
xbt_dict_free(&storage_list);
+ char* host_name_dest = nullptr;
if(longest_prefix_length>0){
/* Mount point found, retrieve the host the storage is attached to */
msg_storage_priv_t storage_dest_priv = MSG_storage_priv(storage_dest);
host_name_dest = (char*)storage_dest_priv->hostname;
host_dest = MSG_host_by_name(host_name_dest);
-
}else{
XBT_WARN("Can't find mount point for '%s' on destination host '%s'", fullpath, sg_host_get_name(host));
return MSG_TASK_CANCELED;
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);
}
/**
- * \ingroup msg_file_management
+ * \ingroup msg_file
* \brief Move a file to another location on a remote host.
* \param file : the file to move
* \param host : the remote host where the file has to be moved
* 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;
}
