1 //----------------------------------------------------------------------
2 // Copyright (C) 2006 - 2007 by the FRESCOR consortium:
4 // Universidad de Cantabria, SPAIN
5 // University of York, UK
6 // Scuola Superiore Sant'Anna, ITALY
7 // Kaiserslautern University, GERMANY
8 // Univ. Politecnica Valencia, SPAIN
9 // Czech Technical University in Prague, CZECH REPUBLIC
11 // Thales Communication S.A. FRANCE
12 // Visual Tools S.A. SPAIN
13 // Rapita Systems Ltd UK
16 // See http://www.frescor.org
18 // The FRESCOR project (FP6/2005/IST/5-034026) is funded
19 // in part by the European Union Sixth Framework Programme
20 // The European Union is not liable of any use that may be
24 // based on previous work (FSF) done in the FIRST project
26 // Copyright (C) 2005 Mälardalen University, SWEDEN
27 // Scuola Superiore S.Anna, ITALY
28 // Universidad de Cantabria, SPAIN
29 // University of York, UK
31 // This file is part of FOSA (Frsh Operating System Abstraction)
33 // FOSA is free software; you can redistribute it and/or modify it
34 // under terms of the GNU General Public License as published by the
35 // Free Software Foundation; either version 2, or (at your option) any
36 // later version. FOSA is distributed in the hope that it will be
37 // useful, but WITHOUT ANY WARRANTY; without even the implied warranty
38 // of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
39 // General Public License for more details. You should have received a
40 // copy of the GNU General Public License along with FOSA; see file
41 // COPYING. If not, write to the Free Software Foundation, 675 Mass Ave,
42 // Cambridge, MA 02139, USA.
44 // As a special exception, including FOSA header files in a file,
45 // instantiating FOSA generics or templates, or linking other files
46 // with FOSA objects to produce an executable application, does not
47 // by itself cause the resulting executable application to be covered
48 // by the GNU General Public License. This exception does not
49 // however invalidate any other reasons why the executable file might be
50 // covered by the GNU Public License.
51 // -----------------------------------------------------------------------
53 //==============================================
54 // ******** ****** ******** **********
55 // **///// /** ** **////// /** /**
56 // ** /** ** /** /** /**
57 // ******* /** ** /********* /**********
58 // **//// /** ** ////////** /**//////**
59 // ** /** ** /** /** /**
60 // ** /** ** ******** /** /**
61 // // /******/ //////// // //
63 // FOSA(Frescor Operating System Adaptation layer)
64 //================================================
66 #include "frsh_fosa.h"
71 #include <timespec_operations.h> /* for incr_timespec */
73 #include <misc/error_checks.h>
75 /*************************
77 *************************/
80 * frsh_thread_attr_init()
82 * Initialize a thread attributes object
84 * This function initializes the object pointed to by attr to all
85 * the default values defined by FRSH
87 * @return 0 if successful; otherwise it returns \n
88 * FOSA_ENOMEM: insufficient memory exists to initialize the thread
91 int frsh_thread_attr_init(frsh_thread_attr_t *attr)
95 ret_value=pthread_attr_init(attr);
97 // set the default values
99 // detachstate = detached thread (no join operation allowed)
100 CHK(pthread_attr_setdetachstate(attr,PTHREAD_CREATE_DETACHED));
102 // inheritsched = explicit, so that we can explicitly set the attributes
103 CHK(pthread_attr_setinheritsched(attr,PTHREAD_EXPLICIT_SCHED));
105 // schedpolicy = fixed priorities
106 CHK(pthread_attr_setschedpolicy(attr,SCHED_FIFO));
108 // detachstate = detached thread (no join operation allowed)
109 CHK(pthread_attr_setdetachstate(attr,PTHREAD_CREATE_DETACHED));
116 * frsh_thread_attr_destroy()
118 * Destroy a thread attributes object
120 * This function is used to destroy the thread attributes object,
121 * pointed to by attr, and deallocate any system resources allocated for it
125 int frsh_thread_attr_destroy(frsh_thread_attr_t *attr)
127 return pthread_attr_destroy(attr);
131 * frsh_thread_attr_set_stacksize()
133 * Set the thread minimum stack size in a thread attributes object
135 * This function sets the minimum stack size of the thread attributes
136 * object attr to the value given by stacksize, in bytes. This
137 * function has no runtime effect on the stack size, except when the
138 * attributes object is used to create a thread, when it will be
139 * created with the specified minimum stack size
141 * @return 0 if successful, or the following error code:
142 * FOSA_EINVAL: the specified stacksize value is not supported in
143 * this implementation
145 int frsh_thread_attr_set_stacksize
146 (frsh_thread_attr_t *attr, size_t stacksize)
148 return pthread_attr_setstacksize(attr,stacksize);
152 * frsh_thread_attr_get_stacksize()
154 * Get the thread minimum stack size from a thread attributes object
156 * This function sets the variable pointed to by stacksize to the
157 * minimum stack size stored in the thread attributes object attr.
161 int frsh_thread_attr_get_stacksize
162 (const frsh_thread_attr_t *attr, size_t *stacksize)
164 return pthread_attr_getstacksize(attr,stacksize);
171 * Eat some time using system clock facilities
177 void inline frsh_eat(const struct timespec *cpu_time)
181 timespec_2_vtime(cpu_time, vt_clock);
182 vt_use_time((unsigned long long)vt_clock);
186 struct timespec current_time, time_to_go;
188 // NOTE: there should be a constant for the cpu_clock_id of the caller
189 // to avoid calling 'fosa_thread_get_cputime_clock'
190 err = pthread_getcpuclockid(pthread_self(), &clock_id);
192 err = clock_gettime(clock_id, ¤t_time);
193 add_timespec(&time_to_go, ¤t_time, cpu_time);
195 while (smaller_timespec(¤t_time, &time_to_go)) {
196 err = clock_gettime(clock_id, ¤t_time);