| 1 | /* |
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| 2 | * pthread.c - User level <semaphore> library implementation. |
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| 3 | * |
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| 4 | * Author Alain Greiner (2016,2017,2018) |
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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_user.h> |
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| 25 | #include <hal_shared_types.h> |
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| 26 | #include <semaphore.h> |
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| 27 | #include <shared_semaphore.h> |
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| 28 | #include <syscalls_numbers.h> |
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| 29 | #include <stdio.h> |
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| 30 | |
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| 31 | ///////////////////////////////// |
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| 32 | int sem_init( sem_t * sem, |
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| 33 | int pshared, |
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| 34 | unsigned int init_value ) |
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| 35 | { |
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| 36 | if( pshared ) |
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| 37 | { |
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| 38 | printf("[ERROR] in %s : pshared argument must be zero\n", __FUNCTION__ ); |
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| 39 | return -1; |
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| 40 | } |
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| 41 | |
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| 42 | return hal_user_syscall( SYS_SEM, |
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| 43 | (reg_t)sem, |
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| 44 | SEM_INIT, |
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| 45 | (reg_t)init_value, |
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| 46 | 0 ) ; |
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| 47 | } |
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| 48 | |
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| 49 | /////////////////////////// |
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| 50 | int sem_wait( sem_t * sem ) |
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| 51 | { |
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| 52 | return hal_user_syscall( SYS_SEM, |
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| 53 | (reg_t)sem, |
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| 54 | SEM_WAIT, 0, 0 ); |
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| 55 | } |
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| 56 | |
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| 57 | /////////////////////////// |
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| 58 | int sem_post( sem_t * sem ) |
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| 59 | { |
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| 60 | return hal_user_syscall( SYS_SEM, |
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| 61 | (reg_t)sem, |
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| 62 | SEM_POST, 0, 0 ); |
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| 63 | } |
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| 64 | |
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| 65 | ////////////////////////////// |
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| 66 | int sem_destroy( sem_t * sem ) |
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| 67 | { |
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| 68 | return hal_user_syscall( SYS_SEM, |
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| 69 | (reg_t)sem, |
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| 70 | SEM_DESTROY, 0, 0 ); |
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| 71 | } |
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| 72 | |
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| 73 | ////////////////////////////// |
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| 74 | int sem_getvalue( sem_t * sem, |
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| 75 | int * current_value ) |
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| 76 | { |
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| 77 | return hal_user_syscall( SYS_SEM, |
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| 78 | (reg_t)sem, |
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| 79 | SEM_GETVALUE, |
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| 80 | 0, |
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| 81 | (reg_t)current_value ); |
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| 82 | } |
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| 83 | |
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| 84 | |
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| 85 | // Local Variables: |
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| 86 | // tab-width: 4 |
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| 87 | // c-basic-offset: 4 |
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| 88 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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| 89 | // indent-tabs-mode: nil |
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| 90 | // End: |
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| 91 | // vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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| 92 | |
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