int main(int argc, char ** argv) {
shm_network_init();
while(1) {
/* Listen for requests and handle them */
switch(shm_cmd[0]) {
case SHM_CMD_NEW_SERVER: {
/*
* get_packet_ptr is expected to return the start of the string
* that must be passed in while communicating with this process.
*/
shm_t * new_server = shm_connect(SHM_DEV_SERVER, get_packet_ptr(shm_cmd), get_packet_ptr(shm_cmd));
if(SHM_IS_ERR(new_server)) {
/* The server creation failed. Send error to whoever requested the server */
send_err(new_server);
} else {
/* The server is good */
send_confirmation(new_server, sizeof(shm_t));
}
break;
}
case SHM_CMD_NEW_CLIENT: {
shm_id_unique_t * clientname = (shm_id_unique_t *)get_packet_ptr(shm_cmd);
shm_t * new_client = shm_connect(SHM_DEV_CLIENT, clientname->server_id, clientname->unique_id);
if(SHM_IS_ERR(new_client)) {
/* The client creation failed. Send error to whoever requested the client */
send_err(new_client);
} else {
/* The client is good */
send_confirmation(new_client, sizeof(shm_t));
}
break;
}
case SHM_CMD_DESTROY_SERVER:
shm_disconnect((shm_t*)get_packet_ptr(shm_cmd));
shm_ack(NULL, 0);
break;
case SHM_CMD_DESTROY_CLIENT:
shm_disconnect((shm_t*)get_packet_ptr(shm_cmd));
shm_ack(NULL, 0);
break;
case SHM_CMD_SEND:
/* Send packet directly from client/server to device (server or client): */
shm_send_to_device((shm_packet_t*)get_packet_ptr(shm_cmd));
break;
case 0: /* No requests being done */
default:
/* Clear out cmd flag */
shm_ack(NULL, 0);
}
thread_sleep();
}
shm_network_stopall();
return 0; /* The shared memory manager should never return */
}
int main(void)
{
const char *path1="/usr/include/stdio.h";
const int ch1='A';
const char *path2="/usr/include/stdio.h";
const int ch2='B';
const char *path3="/usr/include/stdio.h";
const int ch3='C';
char *text3="\nThis is the test text #3 and integer: ";
char text1[256],text2[256];
ShmLink link1,link2,link3;
int size1,size2,err,i=0,res1=0,res2=0;
size1=strlen(text3)+1;
size2=sizeof(int);
if( (err=shm_connect(&link3,path3,ch3,size1+size2))<0 )
{
fprintf(stderr,"[%s:%d] Error #%d for shm_link:\n%s",
__FILE__,__LINE__,err,shm_strerror(&link3));
return -1;
}
sleep(1);
if( (err=shm_connect(&link2,path2,ch2,size1+size2))<0 )
{
fprintf(stderr,"[%s:%d] Error #%d for shm_link:\n%s",
__FILE__,__LINE__,err,shm_strerror(&link2));
return -1;
}
if( (err=shm_connect(&link1,path1,ch1,size1+size2))<0 )
{
fprintf(stderr,"[%s:%d] Error #%d for shm_link:\n%s",
__FILE__,__LINE__,err,shm_strerror(&link1));
return -1;
}
for(i=0;i<10;i++)
{
if( (err=shm_write(&link3,text3,0,size1))<0 )
{
fprintf(stderr,"[%s:%d] Error #%d for link:\n%s",
__FILE__,__LINE__,err,shm_strerror(&link3));
return -2;
}
if( (err=shm_write(&link3,&i,size1,size2))<0 )
{
fprintf(stderr,"[%s:%d] Error #%d for link:\n%s",
__FILE__,__LINE__,err,shm_strerror(&link3));
return -2;
}
if( (err=shm_read(&link1,text1,0,size1))<0 )
{
fprintf(stderr,"[%s:%d] Error #%d for link:\n%s",
__FILE__,__LINE__,err,shm_strerror(&link1));
return -2;
}
if( (err=shm_read(&link1,&res1,size1,size2))<0 )
{
fprintf(stderr,"[%s:%d] Error #%d for link:\n%s",
__FILE__,__LINE__,err,shm_strerror(&link1));
return -2;
}
if( (err=shm_read(&link2,text2,0,size1))<0 )
{
fprintf(stderr,"[%s:%d] Error #%d for link:\n%s",
__FILE__,__LINE__,err,shm_strerror(&link2));
return -2;
}
if( (err=shm_read(&link2,&res2,size1,size2))<0 )
{
fprintf(stderr,"[%s:%d] Error #%d for link:\n%s",
__FILE__,__LINE__,err,shm_strerror(&link2));
return -2;
}
sleep(2);
}
if( (err=shm_disconnect(&link1))<0 )
{
fprintf(stderr,"[%s:%d] Error #%d for link:\n%s",
__FILE__,__LINE__,err,shm_strerror(&link1));
return -4;
}
if( (err=shm_disconnect(&link2))<0 )
{
fprintf(stderr,"[%s:%d] Error #%d for link:\n%s",
__FILE__,__LINE__,err,shm_strerror(&link2));
return -4;
}
if( (err=shm_disconnect(&link3))<0 )
{
fprintf(stderr,"[%s:%d] Error #%d for link:\n%s",
__FILE__,__LINE__,err,shm_strerror(&link3));
return -4;
}
return 0;
}
