source: trunk/kernel/syscalls/sys_barrier.c@ 508

Last change on this file since 508 was 508, checked in by viala@…, 8 years ago

[syscall] Use assert instead of printk+hal_core_sleep.
File size: 3.5 KB
Line 
1/*
2 * sys_barrier.c - Access a POSIX barrier.
3 *
4 * authors Alain Greiner (2016,2017,2018)
5 *
6 * Copyright (c) UPMC Sorbonne Universites
7 *
8 * This file is part of ALMOS-MKH.
9 *
10 * ALMOS-MKH is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2.0 of the License.
13 *
14 * ALMOS-MKH is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#include <hal_kernel_types.h>
25#include <hal_special.h>
26#include <errno.h>
27#include <thread.h>
28#include <printk.h>
29#include <vmm.h>
30#include <syscalls.h>
31#include <remote_barrier.h>
32
33//////////////////////////////////
34int sys_barrier( void * vaddr,
35 uint32_t operation,
36 uint32_t count )
37{
38 error_t error;
39 vseg_t * vseg;
40
41 thread_t * this = CURRENT_THREAD;
42 process_t * process = this->process;
43
44 // check vaddr in user vspace
45 error = vmm_get_vseg( process , (intptr_t)vaddr , &vseg );
46
47 if( error )
48 {
49
50#if DEBUG_SYSCALLS_ERROR
51printk("\n[ERROR] in %s : unmapped barrier %x / thread %x / process %x\n",
52__FUNCTION__ , (intptr_t)vaddr , this->trdid , process->pid );
53vmm_display( process , false );
54#endif
55 this->errno = error;
56 return -1;
57 }
58
59 // execute requested operation
60 switch( operation )
61 {
62 //////////////////
63 case BARRIER_INIT:
64 {
65 error = remote_barrier_create( (intptr_t)vaddr , count );
66
67 if( error )
68 {
69
70#if DEBUG_SYSCALLS_ERROR
71printk("\n[ERROR] in %s : cannot create barrier %x / thread %x / process %x\n",
72__FUNCTION__ , (intptr_t)vaddr , this->trdid , process->pid );
73#endif
74 this->errno = error;
75 return -1;
76 }
77 break;
78 }
79 //////////////////
80 case BARRIER_WAIT:
81 {
82 xptr_t barrier_xp = remote_barrier_from_ident( (intptr_t)vaddr );
83
84 if( barrier_xp == XPTR_NULL ) // user error
85 {
86
87#if DEBUG_SYSCALLS_ERROR
88printk("\n[ERROR] in %s : barrier %x not registered / thread %x / process %x\n",
89__FUNCTION__ , (intptr_t)vaddr , this->trdid , process->pid );
90#endif
91 this->errno = EINVAL;
92 return -1;
93 }
94 else // success
95 {
96 remote_barrier_wait( barrier_xp );
97 }
98 break;
99 }
100 /////////////////////
101 case BARRIER_DESTROY:
102 {
103 xptr_t barrier_xp = remote_barrier_from_ident( (intptr_t)vaddr );
104
105 if( barrier_xp == XPTR_NULL ) // user error
106 {
107
108#if DEBUG_SYSCALLS_ERROR
109printk("\n[ERROR] in %s : barrier %x not registered / thread %x / process %x\n",
110__FUNCTION__ , (intptr_t)vaddr , this->trdid , process->pid );
111#endif
112 this->errno = EINVAL;
113 return -1;
114 }
115 else // success
116 {
117 remote_barrier_destroy( barrier_xp );
118 }
119 break;
120 }
121 ////////
122 default: {
123 assert ( false, "illegal operation type <%x>", operation );
124 }
125 } // end switch
126
127 return 0;
128
129} // end sys_barrier()
130
Note: See TracBrowser for help on using the repository browser.