src/posix-sem.cpp

   1 /*
   2 libfmail: Semaphore class
   3
   4 Copyright (C) 2007  Carlos Daniel Ruvalcaba Valenzuela <clsdaniel@gmail.com>
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License along
  17 with this program; if not, write to the Free Software Foundation, Inc.,
  18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 */
  20
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <malloc.h>
  24
  25 #include <semaphore.h>
  26 #include <libfmail/semaphore.h>
  27
  28 struct _ossem{
  29         sem_t sem;
  30 };
  31
  32 Semaphore::Semaphore(int value, int shared, int key){
  33         os_sem = (OSSem*)malloc(sizeof(OSSem));
  34         sem_init(&(os_sem->sem), 0, value);
  35 }
  36 Semaphore::~Semaphore(){
  37         sem_destroy(&(os_sem->sem));
  38         free(os_sem);
  39 }
  40
  41 int Semaphore::TryWait(){
  42         sem_trywait(&(os_sem->sem));
  43 }
  44
  45 int Semaphore::Wait(){
  46         sem_wait(&(os_sem->sem));
  47 }
  48
  49 int Semaphore::Post(){
  50         sem_post(&(os_sem->sem));
  51 }
  52
  53 int Semaphore::getValue(){
  54         int ret;
  55         sem_getvalue(&(os_sem->sem), &ret);
  56
  57         return ret;
  58 }