1 /* Copyright (c) 2006, 2007, 2008, 2009, 2010. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
8 #include "simdag/simdag.h"
10 #include "xbt/sysdep.h"
11 #include "surf/surf.h"
13 /* Creates a link and registers it in SD.
15 SD_link_t __SD_link_create(void *surf_link, void *data)
22 xbt_assert0(surf_link != NULL, "surf_link is NULL !");
24 link = xbt_new(s_SD_link_t, 1);
25 link->surf_link = surf_link;
26 link->data = data; /* user data */
27 if (surf_workstation_model->extension.workstation.link_shared(surf_link))
28 link->sharing_policy = SD_LINK_SHARED;
30 link->sharing_policy = SD_LINK_FATPIPE;
32 name = SD_link_get_name(link);
33 xbt_dict_set(sd_global->links, name, link, __SD_link_destroy); /* add the link to the dictionary */
34 sd_global->link_count++;
40 * \brief Returns the link list
42 * Use SD_link_get_number() to know the array size.
44 * \return an array of \ref SD_link_t containing all links
45 * \see SD_link_get_number()
47 const SD_link_t *SD_link_get_list(void)
50 xbt_dict_cursor_t cursor;
56 xbt_assert0(SD_link_get_number() > 0, "There is no link!");
58 if (sd_global->link_list == NULL) { /* this is the first time the function is called */
59 sd_global->link_list = xbt_new(SD_link_t, sd_global->link_count);
62 xbt_dict_foreach(sd_global->links, cursor, key, data) {
63 sd_global->link_list[i++] = (SD_link_t) data;
66 return sd_global->link_list;
70 * \brief Returns the number of links
72 * \return the number of existing links
73 * \see SD_link_get_list()
75 int SD_link_get_number(void)
78 return sd_global->link_count;
82 * \brief Returns the user data of a link
85 * \return the user data associated with this link (can be \c NULL)
86 * \see SD_link_set_data()
88 void *SD_link_get_data(SD_link_t link)
91 xbt_assert0(link != NULL, "Invalid parameter");
96 * \brief Sets the user data of a link
98 * The new data can be \c NULL. The old data should have been freed first
99 * if it was not \c NULL.
102 * \param data the new data you want to associate with this link
103 * \see SD_link_get_data()
105 void SD_link_set_data(SD_link_t link, void *data)
107 SD_CHECK_INIT_DONE();
108 xbt_assert0(link != NULL, "Invalid parameter");
113 * \brief Returns the name of a link
116 * \return the name of this link (cannot be \c NULL)
118 const char *SD_link_get_name(SD_link_t link)
120 SD_CHECK_INIT_DONE();
121 xbt_assert0(link != NULL, "Invalid parameter");
122 return surf_resource_name(link->surf_link);
126 * \brief Returns the current bandwidth of a link
129 * \return the current bandwidth of this link, in bytes per second
131 double SD_link_get_current_bandwidth(SD_link_t link)
133 SD_CHECK_INIT_DONE();
134 xbt_assert0(link != NULL, "Invalid parameter");
135 return surf_workstation_model->extension.workstation.
136 get_link_bandwidth(link->surf_link);
140 * \brief Returns the current latency of a link
143 * \return the current latency of this link, in seconds
145 double SD_link_get_current_latency(SD_link_t link)
147 SD_CHECK_INIT_DONE();
148 xbt_assert0(link != NULL, "Invalid parameter");
149 return surf_workstation_model->extension.workstation.
150 get_link_latency(link->surf_link);
154 * \brief Returns the sharing policy of this workstation.
157 * \return the sharing policyfor the flows going through this link:
158 * SD_LINK_SHARED or SD_LINK_FATPIPE
161 e_SD_link_sharing_policy_t SD_link_get_sharing_policy(SD_link_t link)
163 SD_CHECK_INIT_DONE();
164 xbt_assert0(link != NULL, "Invalid parameter");
165 return link->sharing_policy;
171 void __SD_link_destroy(void *link)
173 SD_CHECK_INIT_DONE();
174 xbt_assert0(link != NULL, "Invalid parameter");
175 /* link->surf_link is freed by surf_exit and link->data is freed by the user */