| [469] | 1 | /* |
|---|
| 2 | * pthread.c - User leve <semaphore> library implementation. |
|---|
| 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_user.h> |
|---|
| 25 | #include <hal_shared_types.h> |
|---|
| 26 | #include <semaphore.h> |
|---|
| 27 | #include <shared_semaphore.h> |
|---|
| 28 | #include <syscalls_numbers.h> |
|---|
| 29 | #include <stdio.h> |
|---|
| 30 | |
|---|
| 31 | ///////////////////////////////// |
|---|
| 32 | int sem_init( sem_t * sem, |
|---|
| 33 | int pshared, |
|---|
| 34 | unsigned int init_value ) |
|---|
| 35 | { |
|---|
| 36 | if( pshared ) |
|---|
| 37 | { |
|---|
| 38 | printf("[ERROR] in %s : pshared argument must be zero\n", __FUNCTION__ ); |
|---|
| 39 | return -1; |
|---|
| 40 | } |
|---|
| 41 | |
|---|
| 42 | return hal_user_syscall( SYS_SEM, |
|---|
| 43 | (reg_t)sem, |
|---|
| 44 | SEM_INIT, |
|---|
| 45 | (reg_t)init_value, |
|---|
| 46 | 0 ) ; |
|---|
| 47 | } |
|---|
| 48 | |
|---|
| 49 | /////////////////////////// |
|---|
| 50 | int sem_wait( sem_t * sem ) |
|---|
| 51 | { |
|---|
| 52 | return hal_user_syscall( SYS_SEM, |
|---|
| 53 | (reg_t)sem, |
|---|
| 54 | SEM_WAIT, 0, 0 ); |
|---|
| 55 | } |
|---|
| 56 | |
|---|
| 57 | /////////////////////////// |
|---|
| 58 | int sem_post( sem_t * sem ) |
|---|
| 59 | { |
|---|
| 60 | return hal_user_syscall( SYS_SEM, |
|---|
| 61 | (reg_t)sem, |
|---|
| 62 | SEM_POST, 0, 0 ); |
|---|
| 63 | } |
|---|
| 64 | |
|---|
| 65 | ////////////////////////////// |
|---|
| 66 | int sem_destroy( sem_t * sem ) |
|---|
| 67 | { |
|---|
| 68 | return hal_user_syscall( SYS_SEM, |
|---|
| 69 | (reg_t)sem, |
|---|
| 70 | SEM_DESTROY, 0, 0 ); |
|---|
| 71 | } |
|---|
| 72 | |
|---|
| 73 | ////////////////////////////// |
|---|
| 74 | int sem_getvalue( sem_t * sem, |
|---|
| 75 | int * current_value ) |
|---|
| 76 | { |
|---|
| 77 | return hal_user_syscall( SYS_SEM, |
|---|
| 78 | (reg_t)sem, |
|---|
| 79 | SEM_GETVALUE, |
|---|
| 80 | 0, |
|---|
| 81 | (reg_t)current_value ); |
|---|
| 82 | } |
|---|
| 83 | |
|---|
| 84 | |
|---|
| 85 | // Local Variables: |
|---|
| 86 | // tab-width: 4 |
|---|
| 87 | // c-basic-offset: 4 |
|---|
| 88 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
|---|
| 89 | // indent-tabs-mode: nil |
|---|
| 90 | // End: |
|---|
| 91 | // vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
|---|
| 92 | |
|---|
