[1] | 1 | /* |
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[23] | 2 | * sys_condvar.c - Access a POSIX condvar. |
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[1] | 3 | * |
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[23] | 4 | * Author Alain Greiner (2016,2017) |
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[1] | 5 | * |
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[23] | 6 | * Copyright (c) UPMC Sorbonne Universites |
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[1] | 7 | * |
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[23] | 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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[1] | 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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[23] | 14 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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[1] | 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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[23] | 20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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[1] | 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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[23] | 24 | #include <hal_types.h> |
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| 25 | #include <hal_special.h> |
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[1] | 26 | #include <errno.h> |
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| 27 | #include <thread.h> |
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[23] | 28 | #include <printk.h> |
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[1] | 29 | #include <vmm.h> |
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[23] | 30 | #include <syscalls.h> |
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| 31 | #include <remote_condvar.h> |
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[1] | 32 | |
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[23] | 33 | //////////////////////////////////////// |
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| 34 | int sys_condvar( void * condvar, |
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| 35 | uint32_t operation, |
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| 36 | void * mutex ) |
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[1] | 37 | { |
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[23] | 38 | error_t error; |
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| 39 | paddr_t paddr; |
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[1] | 40 | |
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[23] | 41 | thread_t * this = CURRENT_THREAD; |
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[1] | 42 | |
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[23] | 43 | // check condvar in user vspace |
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| 44 | error = vmm_v2p_translate( false , condvar , &paddr ); |
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| 45 | if( error ) |
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| 46 | { |
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| 47 | printk("\n[ERROR] in %s : illegal condvar virtual address = %x\n", |
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| 48 | __FUNCTION__ , (intptr_t)condvar ); |
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| 49 | this->errno = error; |
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| 50 | return -1; |
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| 51 | } |
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[1] | 52 | |
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[23] | 53 | // execute requested operation |
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| 54 | switch( operation ) |
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[1] | 55 | { |
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[23] | 56 | ////////////////// |
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| 57 | case CONDVAR_INIT: |
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| 58 | { |
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| 59 | error = remote_condvar_create( (intptr_t)condvar ); |
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[1] | 60 | |
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[23] | 61 | if( error ) |
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| 62 | { |
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| 63 | printk("\n[ERROR] in %s : cannot create condvar = %x\n", |
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| 64 | __FUNCTION__ , (intptr_t)condvar ); |
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| 65 | this->errno = error; |
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| 66 | return -1; |
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| 67 | } |
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| 68 | break; |
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| 69 | } |
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| 70 | ////////////////// |
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| 71 | case CONDVAR_WAIT: |
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| 72 | { |
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| 73 | // check mutex in user vspace |
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| 74 | error = vmm_v2p_translate( false , mutex , &paddr ); |
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| 75 | |
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| 76 | if( error ) |
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| 77 | { |
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| 78 | printk("\n[ERROR] in %s : illegal condvar virtual address = %x\n", |
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| 79 | __FUNCTION__ , (intptr_t)condvar ); |
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| 80 | this->errno = error; |
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| 81 | return -1; |
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| 82 | } |
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| 83 | |
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| 84 | xptr_t condvar_xp = remote_condvar_from_ident( (intptr_t)condvar ); |
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| 85 | |
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| 86 | if( condvar_xp == XPTR_NULL ) // user error |
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| 87 | { |
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| 88 | printk("\n[ERROR] in %s : condvar %x not registered\n", |
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| 89 | __FUNCTION__ , (intptr_t)condvar ); |
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| 90 | this->errno = EINVAL; |
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| 91 | return -1; |
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| 92 | } |
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[1] | 93 | |
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[23] | 94 | xptr_t mutex_xp = remote_condvar_from_ident( (intptr_t)condvar ); |
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| 95 | if( mutex_xp == XPTR_NULL ) // user error |
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| 96 | { |
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| 97 | printk("\n[ERROR] in %s : mutex %x not registered\n", |
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| 98 | __FUNCTION__ , (intptr_t)condvar ); |
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| 99 | this->errno = EINVAL; |
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| 100 | return -1; |
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| 101 | } |
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[1] | 102 | |
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[23] | 103 | remote_condvar_wait( condvar_xp , mutex_xp ); |
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[1] | 104 | |
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[23] | 105 | break; |
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| 106 | } |
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| 107 | //////////////////// |
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| 108 | case CONDVAR_SIGNAL: |
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| 109 | { |
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| 110 | xptr_t condvar_xp = remote_condvar_from_ident( (intptr_t)condvar ); |
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[1] | 111 | |
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[23] | 112 | if( condvar_xp == XPTR_NULL ) // user error |
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| 113 | { |
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| 114 | printk("\n[ERROR] in %s : condvar %x not registered\n", |
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| 115 | __FUNCTION__ , (intptr_t)condvar ); |
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| 116 | this->errno = EINVAL; |
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| 117 | return -1; |
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| 118 | } |
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[1] | 119 | |
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[23] | 120 | remote_condvar_signal( condvar_xp ); |
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| 121 | |
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| 122 | break; |
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| 123 | } |
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| 124 | /////////////////////// |
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| 125 | case CONDVAR_BROADCAST: |
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| 126 | { |
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| 127 | xptr_t condvar_xp = remote_condvar_from_ident( (intptr_t)condvar ); |
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[1] | 128 | |
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[23] | 129 | if( condvar_xp == XPTR_NULL ) // user error |
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| 130 | { |
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| 131 | printk("\n[ERROR] in %s : condvar %x not registered\n", |
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| 132 | __FUNCTION__ , (intptr_t)condvar ); |
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| 133 | this->errno = EINVAL; |
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| 134 | return -1; |
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| 135 | } |
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[1] | 136 | |
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[23] | 137 | remote_condvar_broadcast( condvar_xp ); |
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[1] | 138 | |
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[23] | 139 | break; |
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| 140 | } |
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| 141 | ///////////////////// |
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| 142 | case CONDVAR_DESTROY: |
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| 143 | { |
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| 144 | xptr_t condvar_xp = remote_condvar_from_ident( (intptr_t)condvar ); |
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[1] | 145 | |
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[23] | 146 | if( condvar_xp == XPTR_NULL ) // user error |
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| 147 | { |
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| 148 | printk("\n[ERROR] in %s : condvar %x not registered\n", |
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| 149 | __FUNCTION__ , (intptr_t)condvar ); |
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| 150 | this->errno = EINVAL; |
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| 151 | return -1; |
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| 152 | } |
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[1] | 153 | |
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[23] | 154 | remote_condvar_destroy( condvar_xp ); |
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[1] | 155 | |
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[23] | 156 | break; |
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| 157 | } |
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| 158 | ///////// |
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| 159 | default: |
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| 160 | { |
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| 161 | printk("\n[PANIC] in %s : illegal operation type\n", __FUNCTION__ ); |
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| 162 | hal_core_sleep(); |
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| 163 | } |
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| 164 | } // end switch |
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[1] | 165 | |
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[23] | 166 | return 0; |
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[1] | 167 | |
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[23] | 168 | } // enc sys_condvar() |
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| 169 | |
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