ipc_smem.h

/* ########################################################################
 
   PICSimLab - Programmable IC Simulator Laboratory
 
   ########################################################################
 
   Copyright (c) : 2023-2024  Luis Claudio Gambôa Lopes <lcgamboa@yahoo.com>
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
   For e-mail suggestions :  lcgamboa@yahoo.com
   ######################################################################## */
 
#ifndef IPC_SMEM
#define IPC_SMEM
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
 
#ifdef _WIN_
#include <conio.h>
#include <windows.h>
typedef struct {
    void* pMem;
    unsigned int size;
    char key[256];
    HANDLE hMap;
    HANDLE hsemid[2];
} shared_block_t;
 
#else  // LINUX
#include <fcntl.h>
#include <semaphore.h>
#include <sys/mman.h>
#include <time.h>
typedef struct {
    void* pMem;
    unsigned int size;
    char key[256];
    sem_t* semid[2];
} shared_block_t;
#endif
 
#define SB_FULL 0
#define SB_EMPTY 1
 
int sb_setup(const char* key, unsigned int size, shared_block_t* sb);
void sb_finish(shared_block_t* sb);
void sb_sem_init(shared_block_t* sb);
void sb_sem_finish(shared_block_t* sb);
int sb_sem_wait(shared_block_t* sb, int index);
int sb_sem_try_wait(shared_block_t* sb, int index);
int sb_sem_timed_wait(shared_block_t* sb, int index, unsigned int ms);
void sb_sem_signal(shared_block_t* sb, int index);
 
#endif