source: trunk/kernel/syscalls/sys_mutex.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: 4.3 KB
Line 
1/*
2 * sys_mutex.c - Access a POSIX mutex.
3 *
4 * Author 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_mutex.h>
32
33
34/////////////////////////////////
35int sys_mutex( void * vaddr,
36 uint32_t operation,
37 uint32_t attr )
38{
39 error_t error;
40 vseg_t * vseg;
41
42 thread_t * this = CURRENT_THREAD;
43 process_t * process = this->process;
44
45 // check vaddr in user vspace
46 error = vmm_get_vseg( process , (intptr_t)vaddr , &vseg );
47
48 if( error )
49 {
50
51#if DEBUG_SYSCALLS_ERROR
52printk("\n[ERROR] in %s : mutex unmapped %x / thread %x / process %x\n",
53__FUNCTION__ , (intptr_t)vaddr , this->trdid , process->pid );
54vmm_display( process , false );
55#endif
56 this->errno = error;
57 return -1;
58 }
59
60 // execute requested operation
61 switch( operation )
62 {
63 ////////////////
64 case MUTEX_INIT:
65 {
66 if( attr != 0 )
67 {
68
69#if DEBUG_SYSCALLS_ERROR
70printk("\n[ERROR] in %s : mutex attribute non supported / thread %x / process %x\n",
71__FUNCTION__ , this->trdid , process->pid );
72#endif
73 this->errno = error;
74 return -1;
75 }
76
77 error = remote_mutex_create( (intptr_t)vaddr );
78
79 if( error )
80 {
81
82#if DEBUG_SYSCALLS_ERROR
83printk("\n[ERROR] in %s : cannot create mutex / thread %x / process %x\n",
84__FUNCTION__ , this->trdid , process->pid );
85#endif
86 this->errno = error;
87 return -1;
88 }
89 break;
90 }
91 ///////////////////
92 case MUTEX_DESTROY:
93 {
94 xptr_t mutex_xp = remote_mutex_from_ident( (intptr_t)vaddr );
95
96 if( mutex_xp == XPTR_NULL ) // user error
97 {
98
99#if DEBUG_SYSCALLS_ERROR
100printk("\n[ERROR] in %s : mutex %x not registered / thread %x / process %x\n",
101__FUNCTION__ , (intptr_t)vaddr , this->trdid , process->pid );
102#endif
103 this->errno = EINVAL;
104 return -1;
105 }
106 else // success
107 {
108 remote_mutex_destroy( mutex_xp );
109 }
110 break;
111 }
112 ////////////////
113 case MUTEX_LOCK:
114 {
115 xptr_t mutex_xp = remote_mutex_from_ident( (intptr_t)vaddr );
116
117 if( mutex_xp == XPTR_NULL ) // user error
118 {
119
120#if DEBUG_SYSCALLS_ERROR
121printk("\n[ERROR] in %s : mutex %x not registered / thread %x / process %x\n",
122__FUNCTION__ , (intptr_t)vaddr , this->trdid , process->pid );
123#endif
124 this->errno = EINVAL;
125 return -1;
126 }
127 else // success
128 {
129 remote_mutex_lock( mutex_xp );
130 }
131 break;
132 }
133 //////////////////
134 case MUTEX_UNLOCK:
135 {
136 xptr_t mutex_xp = remote_mutex_from_ident( (intptr_t)vaddr );
137
138 if( mutex_xp == XPTR_NULL ) // user error
139 {
140
141#if DEBUG_SYSCALLS_ERROR
142printk("\n[ERROR] in %s : mutex %x not registered / thread %x / process %x\n",
143__FUNCTION__ , (intptr_t)vaddr , this->trdid , process->pid );
144#endif
145 this->errno = EINVAL;
146 return -1;
147 }
148 else // success
149 {
150 remote_mutex_unlock( mutex_xp );
151 }
152 break;
153 }
154 ////////
155 default: {
156 assert ( false, "illegal operation type <%x>", operation );
157 }
158 }
159
160 return 0;
161
162} // end sys_mutex()
163
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