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/**
* @licence app begin@
* Copyright (C) 2012 BMW AG
*
* This file is part of GENIVI Project Dlt - Diagnostic Log and Trace console apps.
*
* Contributions are licensed to the GENIVI Alliance under one or more
* Contribution License Agreements.
*
* \copyright
* This Source Code Form is subject to the terms of the
* Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with
* this file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*
* \author Alexander Wenzel <alexander.aw.wenzel@bmw.de> BMW 2011-2012
*
* \file dlt_shm.c
* For further information see http://www.genivi.org/.
* @licence end@
*/
/*******************************************************************************
** **
** SRC-MODULE: dlt_shm.c **
** **
** TARGET : linux **
** **
** PROJECT : DLT **
** **
** AUTHOR : Alexander Wenzel Alexander.AW.Wenzel@bmw.de **
** **
** PURPOSE : **
** **
** REMARKS : **
** **
** PLATFORM DEPENDANT [yes/no]: yes **
** **
** TO BE CHANGED BY USER [yes/no]: no **
** **
*******************************************************************************/
/*******************************************************************************
** Author Identity **
********************************************************************************
** **
** Initials Name Company **
** -------- ------------------------- ---------------------------------- **
** aw Alexander Wenzel BMW **
*******************************************************************************/
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/sem.h>
#include <sys/stat.h>
#include <stdio.h>
#include <string.h>
#if !defined(_MSC_VER)
#include <unistd.h>
#include <syslog.h>
#endif
#include <dlt_shm.h>
#include <dlt_common.h>
void dlt_shm_print_hex(char *ptr,int size)
{
int num;
for (num=0;num<size;num++)
{
if((num%16)==15)
printf("%.2x\n",((unsigned char*)ptr)[num]);
else
printf("%.2x ",((unsigned char*)ptr)[num]);
}
printf("\n");
}
void dlt_shm_pv(int id,int operation)
{
static struct sembuf semaphor;
semaphor.sem_op = operation;
semaphor.sem_flg = SEM_UNDO;
if(semop(id, &semaphor,1) == -1) {
dlt_log(LOG_ERR,"SHM: semop");
}
}
int dlt_shm_init_server(DltShm *buf,int key,int size) {
struct shmid_ds shm_buf;
unsigned char *ptr;
// Init parameters
buf->shmid = 0;
buf->semid = 0;
// Create the segment.
if ((buf->shmid = shmget(key, size, IPC_CREAT | 0666)) < 0) {
dlt_log(LOG_ERR,"SHM: shmget");
return -1; /* ERROR */
}
// get the size of shm
if (shmctl(buf->shmid, IPC_STAT, &shm_buf))
{
dlt_log(LOG_ERR,"SHM: shmctl");
return -1; /* ERROR */
}
// Now we attach the segment to our data space.
if ((ptr = shmat(buf->shmid, NULL, 0)) == (unsigned char *) -1) {
dlt_log(LOG_ERR,"SHM: shmat");
return -1; /* ERROR */
}
// Init semaphore
if( (buf->semid = semget(DLT_SHM_SEM,1,S_IRWXU|S_IRWXG|S_IRWXO|IPC_CREAT|IPC_EXCL)) == -1 ) {
if( (buf->semid = semget(DLT_SHM_SEM,1,S_IRWXU|S_IRWXG|S_IRWXO|IPC_EXCL)) == -1 ) {
dlt_log(LOG_ERR,"SHM: semget");
return -1; /* ERROR */
}
}
if( semctl(buf->semid,0,SETVAL,(int)1) == -1 ) {
dlt_log(LOG_ERR,"SHM: semctl");
return -1; /* ERROR */
}
// init buffer
dlt_buffer_init_static_server(&(buf->buffer),ptr,shm_buf.shm_segsz);
return 0; /* OK */
}
int dlt_shm_init_client(DltShm *buf,int key) {
struct shmid_ds shm_buf;
unsigned char *ptr;
// init parameters
buf->shmid = 0;
buf->semid = 0;
// Create the segment.
if ((buf->shmid = shmget(key, 0, 0666)) < 0) {
dlt_log(LOG_ERR,"SHM: shmget");
return -1; /* ERROR */
}
// get the size of shm
if (shmctl(buf->shmid, IPC_STAT, &shm_buf))
{
dlt_log(LOG_ERR,"SHM: shmctl");
return -1; /* ERROR */
}
// Now we attach the segment to our data space.
if ((ptr = shmat(buf->shmid, NULL, 0)) == (unsigned char *) -1) {
dlt_log(LOG_ERR,"shmat");
return -1; /* ERROR */
}
// Init semaphore
if( (buf->semid = semget(DLT_SHM_SEM,0,0)) == -1 ) {
dlt_log(LOG_ERR,"SHM: semget");
return -1; /* ERROR */
}
// init buffer
dlt_buffer_init_static_client(&(buf->buffer),ptr,shm_buf.shm_segsz);
return 0; /* OK */
}
void dlt_shm_info(DltShm *buf)
{
dlt_buffer_info(&(buf->buffer));
}
void dlt_shm_status(DltShm *buf)
{
dlt_buffer_status(&(buf->buffer));
}
int dlt_shm_get_total_size(DltShm *buf)
{
return dlt_buffer_get_total_size(&(buf->buffer));
}
int dlt_shm_get_used_size(DltShm *buf)
{
int ret;
/* check if buffer available */
if(!buf->buffer.mem)
return -1;
DLT_SHM_SEM_GET(buf->semid);
ret = dlt_buffer_get_used_size(&(buf->buffer));
DLT_SHM_SEM_FREE(buf->semid);
return ret;
}
int dlt_shm_get_message_count(DltShm *buf)
{
return dlt_buffer_get_message_count(&(buf->buffer));
}
int dlt_shm_push(DltShm *buf,const unsigned char *data1,unsigned int size1,const unsigned char *data2,unsigned int size2,const unsigned char *data3,unsigned int size3)
{
int ret;
/* check if buffer available */
if(!buf->buffer.mem)
return -1;
DLT_SHM_SEM_GET(buf->semid);
ret = dlt_buffer_push3(&(buf->buffer),data1,size1,data2,size2,data3,size3);
DLT_SHM_SEM_FREE(buf->semid);
return ret;
}
int dlt_shm_pull(DltShm *buf,unsigned char *data, int max_size)
{
int ret;
/* check if buffer available */
if(!buf->buffer.mem)
return -1;
DLT_SHM_SEM_GET(buf->semid);
ret = dlt_buffer_pull(&(buf->buffer),data,max_size);
DLT_SHM_SEM_FREE(buf->semid);
return ret;
}
int dlt_shm_copy(DltShm *buf,unsigned char *data, int max_size)
{
int ret;
/* check if buffer available */
if(!buf->buffer.mem)
return -1;
DLT_SHM_SEM_GET(buf->semid);
ret = dlt_buffer_copy(&(buf->buffer),data,max_size);
DLT_SHM_SEM_FREE(buf->semid);
return ret;
}
int dlt_shm_remove(DltShm *buf)
{
int ret;
/* check if buffer available */
if(!buf->buffer.mem)
return -1;
DLT_SHM_SEM_GET(buf->semid);
ret = dlt_buffer_remove(&(buf->buffer));
DLT_SHM_SEM_FREE(buf->semid);
return ret;
}
int dlt_shm_free_server(DltShm *buf) {
if(shmdt(buf->buffer.shm)) {
dlt_log(LOG_ERR,"SHM: shmdt");
return -1; /* ERROR */
}
if(shmctl(buf->shmid,IPC_RMID,NULL) == -1) {
dlt_log(LOG_ERR,"SHM: shmdt");
return -1; /* ERROR */
}
if(semctl(buf->semid,0,IPC_RMID,(int)0) == -1) {
dlt_log(LOG_ERR,"SHM: shmdt");
return -1; /* ERROR */
}
// Reset parameters
buf->shmid = 0;
buf->semid = 0;
return dlt_buffer_free_static(&(buf->buffer));
}
int dlt_shm_free_client(DltShm *buf) {
if(shmdt(buf->buffer.shm)) {
dlt_log(LOG_ERR,"SHM: shmdt");
return -1; /* ERROR */
}
// Reset parameters
buf->shmid = 0;
buf->semid = 0;
return dlt_buffer_free_static(&(buf->buffer));
}
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