1 | /* |
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2 | * sys_mutex.c - Access a POSIX mutex. |
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3 | * |
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4 | * Author Alain Greiner (2016,2017) |
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5 | * |
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6 | * Copyright (c) UPMC Sorbonne Universites |
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7 | * |
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8 | * This file is part of ALMOS-MKH. |
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9 | * |
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10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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11 | * under the terms of the GNU General Public License as published by |
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12 | * the Free Software Foundation; version 2.0 of the License. |
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13 | * |
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14 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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17 | * General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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22 | */ |
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23 | |
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24 | #include <hal_types.h> |
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25 | #include <hal_special.h> |
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26 | #include <errno.h> |
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27 | #include <thread.h> |
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28 | #include <printk.h> |
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29 | #include <vmm.h> |
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30 | #include <syscalls.h> |
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31 | #include <remote_mutex.h> |
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32 | |
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33 | |
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34 | ///////////////////////////////// |
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35 | int sys_mutex( void * vaddr, |
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36 | uint32_t operation, |
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37 | uint32_t attr ) |
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38 | { |
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39 | error_t error; |
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40 | paddr_t paddr; |
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41 | |
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42 | thread_t * this = CURRENT_THREAD; |
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43 | |
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44 | // check vaddr in user vspace |
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45 | error = vmm_v2p_translate( false , vaddr , &paddr ); |
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46 | if( error ) |
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47 | { |
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48 | printk("\n[ERROR] in %s : illegal virtual address = %x\n", |
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49 | __FUNCTION__ , (intptr_t)vaddr ); |
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50 | this->errno = error; |
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51 | return -1; |
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52 | } |
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53 | |
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54 | // execute requested operation |
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55 | switch( operation ) |
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56 | { |
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57 | //////////////// |
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58 | case MUTEX_INIT: |
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59 | { |
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60 | if( attr != 0 ) |
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61 | { |
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62 | printk("\n[ERROR] in %s : mutex attributes non supported yet\n", |
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63 | __FUNCTION__ ); |
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64 | this->errno = error; |
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65 | return -1; |
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66 | } |
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67 | |
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68 | error = remote_mutex_create( (intptr_t)vaddr ); |
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69 | |
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70 | if( error ) |
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71 | { |
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72 | printk("\n[ERROR] in %s : cannot create mutex\n", |
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73 | __FUNCTION__ ); |
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74 | this->errno = error; |
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75 | return -1; |
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76 | } |
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77 | break; |
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78 | } |
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79 | /////////////////// |
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80 | case MUTEX_DESTROY: |
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81 | { |
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82 | xptr_t mutex_xp = remote_mutex_from_ident( (intptr_t)vaddr ); |
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83 | |
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84 | if( mutex_xp == XPTR_NULL ) // user error |
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85 | { |
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86 | printk("\n[ERROR] in %s : mutex %x not registered\n", |
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87 | __FUNCTION__ , (intptr_t)vaddr ); |
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88 | this->errno = EINVAL; |
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89 | return -1; |
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90 | } |
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91 | else // success |
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92 | { |
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93 | remote_mutex_destroy( mutex_xp ); |
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94 | } |
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95 | break; |
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96 | } |
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97 | //////////////// |
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98 | case MUTEX_LOCK: |
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99 | { |
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100 | xptr_t mutex_xp = remote_mutex_from_ident( (intptr_t)vaddr ); |
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101 | |
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102 | if( mutex_xp == XPTR_NULL ) // user error |
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103 | { |
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104 | printk("\n[ERROR] in %s : mutex %x not registered\n", |
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105 | __FUNCTION__ , (intptr_t)vaddr ); |
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106 | this->errno = EINVAL; |
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107 | return -1; |
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108 | } |
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109 | else // success |
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110 | { |
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111 | remote_mutex_lock( mutex_xp ); |
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112 | } |
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113 | break; |
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114 | } |
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115 | ////////////////// |
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116 | case MUTEX_UNLOCK: |
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117 | { |
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118 | xptr_t mutex_xp = remote_mutex_from_ident( (intptr_t)vaddr ); |
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119 | |
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120 | if( mutex_xp == XPTR_NULL ) // user error |
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121 | { |
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122 | printk("\n[ERROR] in %s : mutex %x not registered\n", |
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123 | __FUNCTION__ , (intptr_t)vaddr ); |
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124 | this->errno = EINVAL; |
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125 | return -1; |
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126 | } |
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127 | else // success |
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128 | { |
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129 | remote_mutex_unlock( mutex_xp ); |
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130 | } |
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131 | break; |
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132 | } |
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133 | //////// |
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134 | default: |
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135 | { |
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136 | printk("\n[PANIC] in %s : illegal operation type\n", __FUNCTION__ ); |
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137 | hal_core_sleep(); |
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138 | } |
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139 | } |
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140 | |
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141 | return 0; |
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142 | |
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143 | } // end sys_mutex() |
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144 | |
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