intertask_interface.h 5.72 KB
Newer Older
Cedric Roux's avatar
 
Cedric Roux committed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
/*******************************************************************************

  Eurecom OpenAirInterface
  Copyright(c) 1999 - 2012 Eurecom

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information
  Openair Admin: openair_admin@eurecom.fr
  Openair Tech : openair_tech@eurecom.fr
  Forums       : http://forums.eurecom.fr/openairinterface
  Address      : EURECOM, Campus SophiaTech, 450 Route des Chappes
                 06410 Biot FRANCE

*******************************************************************************/

/** @defgroup _intertask_interface_impl_ Intertask Interface Mechanisms
 * Implementation
 * @ingroup _ref_implementation_
 * @{
 */

#ifndef INTERTASK_INTERFACE_H_
#define INTERTASK_INTERFACE_H_

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

44
#include "intertask_interface_conf.h"
Cedric Roux's avatar
 
Cedric Roux committed
45
46
#include "intertask_interface_types.h"

47
48
49
50
#define ITTI_MSG_NAME(mSGpTR)               itti_get_message_name((mSGpTR)->header.messageId)
#define ITTI_MSG_ORIGIN_NAME(mSGpTR)        itti_get_task_name((mSGpTR)->header.originTaskId)
#define ITTI_MSG_DESTINATION_NAME(mSGpTR)   itti_get_task_name((mSGpTR)->header.destinationTaskId)
#define ITTI_MSG_INSTANCE(mSGpTR)           (mSGpTR)->header.instance
51

Cedric Roux's avatar
 
Cedric Roux committed
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
/* Make the message number platform specific */
typedef unsigned long message_number_t;
#define MESSAGE_NUMBER_SIZE (sizeof(unsigned long))

enum message_priorities {
    MESSAGE_PRIORITY_MAX       = 100,
    MESSAGE_PRIORITY_MAX_LEAST = 85,
    MESSAGE_PRIORITY_MED_PLUS  = 70,
    MESSAGE_PRIORITY_MED       = 55,
    MESSAGE_PRIORITY_MED_LEAST = 40,
    MESSAGE_PRIORITY_MIN_PLUS  = 25,
    MESSAGE_PRIORITY_MIN       = 10,
};

typedef struct message_info_s {
    task_id_t id;
    uint32_t priority;
    /* Message payload size */
    MessageHeaderSize size;
    /* Printable name */
72
    const char * const name;
Cedric Roux's avatar
 
Cedric Roux committed
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
} message_info_t;

enum task_priorities {
    TASK_PRIORITY_MAX       = 100,
    TASK_PRIORITY_MAX_LEAST = 85,
    TASK_PRIORITY_MED_PLUS  = 70,
    TASK_PRIORITY_MED       = 55,
    TASK_PRIORITY_MED_LEAST = 40,
    TASK_PRIORITY_MIN_PLUS  = 25,
    TASK_PRIORITY_MIN       = 10,
};

/** \brief Send a broadcast message to every task
 \param message_p Pointer to the message to send
 @returns < 0 on failure, 0 otherwise
 **/
89
int itti_send_broadcast_message(MessageDef *message_p);
Cedric Roux's avatar
 
Cedric Roux committed
90
91
92
93
94
95
96

/** \brief Send a message to a task (could be itself)
 \param task_id Task ID
 \param instance Instance of the task used for virtualization
 \param message Pointer to the message to send
 @returns -1 on failure, 0 otherwise
 **/
97
int itti_send_msg_to_task(task_id_t task_id, instance_t instance, MessageDef *message);
Cedric Roux's avatar
 
Cedric Roux committed
98
99
100
101
102
103

/** \brief Retrieves a message in the queue associated to task_id.
 * If the queue is empty, the thread is blocked till a new message arrives.
 \param task_id Task ID of the receiving task
 \param received_msg Pointer to the allocated message
 **/
104
void itti_receive_msg(task_id_t task_id, MessageDef **received_msg);
Cedric Roux's avatar
 
Cedric Roux committed
105
106
107
108
109
110

/** \brief Try to retrieves a message in the queue associated to task_id and matching requested instance.
 \param task_id Task ID of the receiving task
 \param instance Instance of the task used for virtualization
 \param received_msg Pointer to the allocated message
 **/
111
void itti_poll_msg(task_id_t task_id, instance_t instance, MessageDef **received_msg);
Cedric Roux's avatar
 
Cedric Roux committed
112
113
114
115
116
117
118

/** \brief Start thread associated to the task
 * \param task_id task to start
 * \param start_routine entry point for the task
 * \param args_p Optional argument to pass to the start routine
 * @returns -1 on failure, 0 otherwise
 **/
119
int itti_create_task(task_id_t task_id,
Cedric Roux's avatar
Cedric Roux committed
120
121
                     void *(*start_routine) (void *),
                     void *args_p);
Cedric Roux's avatar
 
Cedric Roux committed
122
123
124
125

/** \brief Mark the task as in ready state
 * \param task_id task to mark as ready
 **/
126
127
void itti_mark_task_ready(task_id_t task_id);

128
129
130
131
/** \brief Exit the current task.
 **/
void itti_exit_task(void);

132
133
134
135
/** \brief Indicate that the task is completed and initiate termination of all tasks.
 * \param task_id task that is completed
 **/
void itti_terminate_tasks(task_id_t task_id);
Cedric Roux's avatar
 
Cedric Roux committed
136
137
138
139

/** \brief Return the printable string associated with the message
 * \param message_id Id of the message
 **/
140
const char *itti_get_message_name(MessagesIds message_id);
Cedric Roux's avatar
 
Cedric Roux committed
141

Cedric Roux's avatar
Cedric Roux committed
142
143
144
/** \brief Return the printable string associated with a task id
 * \param thread_id Id of the task
 **/
145
const char *itti_get_task_name(task_id_t task_id);
Cedric Roux's avatar
Cedric Roux committed
146

Cedric Roux's avatar
 
Cedric Roux committed
147
/** \brief Alloc and memset(0) a new itti message.
148
149
150
 * \param origin_task_id Task ID of the sending task
 * \param message_id Message ID
 * @returns NULL in case of failure or newly allocated mesage ref
Cedric Roux's avatar
 
Cedric Roux committed
151
 **/
152
inline MessageDef *itti_alloc_new_message(
Cedric Roux's avatar
Cedric Roux committed
153
    task_id_t   origin_task_id,
Cedric Roux's avatar
 
Cedric Roux committed
154
155
    MessagesIds message_id);

156
157
158
159
160
161
162
163
164
/** \brief handle signals and wait for all threads to join when the process complete.
 * This function should be called from the main thread after having created all ITTI tasks.
 **/
void itti_wait_tasks_end(void);

/** \brief Send a termination message to all tasks.
 * \param task_id task that is broadcasting the message.
 **/
void itti_send_terminate_message(task_id_t task_id);
Cedric Roux's avatar
 
Cedric Roux committed
165
166
167

#endif /* INTERTASK_INTERFACE_H_ */
/* @} */