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/* INSIGNIA MODULE SPECIFICATION
-----------------------------
THIS PROGRAM SOURCE FILE IS SUPPLIED IN CONFIDENCE TO THE
CUSTOMER, THE CONTENTS OR DETAILS OF ITS OPERATION MUST
NOT BE DISCLOSED TO ANY OTHER PARTIES WITHOUT THE EXPRESS
AUTHORISATION FROM THE DIRECTORS OF INSIGNIA SOLUTIONS LTD.
DESIGNER : Jeremy Maiden
REVISION HISTORY :
First version : May 1992
MODULE NAME : smeg
SOURCE FILE NAME : smeg.h
PURPOSE : spy on cpus and things
SccsID : @(#)smeg.h 1.5 08/10/92
*/
#include TypesH
#include SignalH
#include FCntlH
#include IpcH
#include ShmH
#include TimeH
#include <errno.h>
#define SMEG_EOT 0
#define SMEG_STRING 1
#define SMEG_NUMBER 2
#define SMEG_RATE 3
#define SMEG_BOOL 4
#define SMEG_ROBIN 5
#define SMEG_PROFILE 6
#define SMEG_DANGER 7
struct SMEG_ITEM
{
CHAR name[32];
ULONG type;
ULONG colour;
ULONG sm_min, sm_max, sm_value, previous_sm_value;
};
#define MAX_SMEG_ITEM 50
#define BLACK 0
#define RED 1
#define GREEN 2
#define YELLOW 3
#define BLUE 4
#define WHITE 5
#define SHM_KEY 123456789
#define COLLECT_DATA 0
#define FREEZE_DATA 1
LOCAL INT shmid; /* shared memory */
LOCAL struct SMEG_ITEM *smegs;
LOCAL ULONG *pidptr;
LOCAL ULONG *cntrlptr;
/* sets up shared memory for communication with SoftPC in the same machine */
LOCAL VOID shm_init()
{
/* if shared memory doesn't exist we'll have to invent it */
shmid = shmget(SHM_KEY, MAX_SMEG_ITEM * sizeof(struct SMEG_ITEM), 0777);
if (shmid < 0)
{
shmid = shmget(SHM_KEY, MAX_SMEG_ITEM * sizeof(struct SMEG_ITEM), 0777 | IPC_CREAT);
if (shmid < 0)
{
perror( "smeg" );
printf("Can't create shared memory - exiting\n");
exit(-1);
}
}
pidptr = (ULONG *) shmat(shmid, NULL, 0);
cntrlptr = pidptr + 1;
smegs = (struct SMEG_ITEM *)( pidptr + 2 );
}
LOCAL INT shm_in_contact()
{
struct shmid_ds desc;
shmctl(shmid, IPC_STAT, &desc);
return(desc.shm_nattch > 1);
}
LOCAL VOID shm_terminate()
{
struct shmid_ds desc;
shmdt(smegs); /* detach from shared memory */
shmctl(shmid, IPC_STAT, &desc);
if (desc.shm_nattch == 0) /* if we're the last, delete it */
shmctl(shmid, IPC_RMID, NULL);
}
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