mangavalk/lcdproc
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Removed lcddriver.c (doesn't do anything, isn't in any makefiles, etc.).

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Passed *every* piece of source in this project through indent. I'm setting
things up with ctags soon and am actually going to *gasp* use a nice
programming environment to continue development in. :)
This commit is contained in:
William Ferrell
2000-03-30 20:20:41 +00:00
parent 2222adcfbe
commit f5a5e9653b
88 changed files with 8207 additions and 8723 deletions
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server/drivers/lcd_sem.c
+71 -84
View File
@@ -23,7 +23,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h> /* for semaphore functions */
#include <sys/types.h> /* for semaphore functions */
#include <sys/ipc.h>
#include <sys/sem.h>
#include <errno.h>
@@ -31,19 +31,19 @@
#include "lcd_sem.h"
#define SEMAPHORE "portctrl"
#define SEMKEY 0x706f7274 /* semaphore key */
#define SEMCOUNT 1 /* number of semaphores to create */
#define WMODE 0660 /* access permissions */
#define SEMKEY 0x706f7274 /* semaphore key */
#define SEMCOUNT 1 /* number of semaphores to create */
#define WMODE 0660 /* access permissions */
#define SEM_SIGNAL 0,1,SEM_UNDO
#define SEM_WAIT 0,-1,SEM_UNDO
/* functions local to this file */
static key_t getkey(register char *p);
static key_t getkey (register char *p);
/* global variables */
static struct sembuf semaphore_wait = {SEM_WAIT};
static struct sembuf semaphore_signal = {SEM_SIGNAL};
static struct sembuf semaphore_wait = { SEM_WAIT };
static struct sembuf semaphore_signal = { SEM_SIGNAL };
static char rcsId[] = "$Id$";
@@ -52,9 +52,9 @@ static char rcsId[] = "$Id$";
*/
static key_t
getkey(register char *p)
getkey (register char *p)
{
return((key_t) SEMKEY);
return ((key_t) SEMKEY);
}
/*
@@ -63,50 +63,42 @@ getkey(register char *p)
*/
int
sem_get(void)
sem_get (void)
{
int semid;
union semun semval;
int semid;
union semun semval;
if ((semid = semget(getkey(SEMAPHORE), SEMCOUNT,
IPC_CREAT | IPC_EXCL | WMODE)) < 0)
{
switch (errno)
{
case EEXIST:
/* semaphore set exists, get id and return it */
if ((semid = semget(getkey(SEMAPHORE), SEMCOUNT,
IPC_EXCL | WMODE)) < 0)
{
perror("semget");
exit(1);
}
return semid;
break;
case EACCES:
/* don't have permissions for semaphore, need to change key */
perror("semget, can't get permissions for semaphore");
exit(1);
break;
default:
perror("semget");
exit(1);
break;
}
}
else
{
/* initialise semaphore to 1 */
semval.val = 1;
if ((semid = semget (getkey (SEMAPHORE), SEMCOUNT, IPC_CREAT | IPC_EXCL | WMODE)) < 0) {
switch (errno) {
case EEXIST:
/* semaphore set exists, get id and return it */
if ((semid = semget (getkey (SEMAPHORE), SEMCOUNT, IPC_EXCL | WMODE)) < 0) {
perror ("semget");
exit (1);
}
return semid;
break;
case EACCES:
/* don't have permissions for semaphore, need to change key */
perror ("semget, can't get permissions for semaphore");
exit (1);
break;
default:
perror ("semget");
exit (1);
break;
}
} else {
/* initialise semaphore to 1 */
semval.val = 1;
if (semctl(semid, 0, SETVAL, semval) < 0)
{
perror("setval, can't initialise semaphore");
exit(1);
}
}
return semid;
if (semctl (semid, 0, SETVAL, semval) < 0) {
perror ("setval, can't initialise semaphore");
exit (1);
}
}
return semid;
}
/*
@@ -114,15 +106,14 @@ sem_get(void)
*/
int
sem_wait(int sid)
sem_wait (int sid)
{
if (semop(sid, &semaphore_wait, 1) < -1)
{
perror(SEMAPHORE);
exit(1);
}
if (semop (sid, &semaphore_wait, 1) < -1) {
perror (SEMAPHORE);
exit (1);
}
return 0;
return 0;
}
/*
@@ -130,15 +121,14 @@ sem_wait(int sid)
*/
int
sem_signal(int sid)
sem_signal (int sid)
{
if (semop(sid, &semaphore_signal, 1) < -1)
{
perror(SEMAPHORE);
exit(1);
}
if (semop (sid, &semaphore_signal, 1) < -1) {
perror (SEMAPHORE);
exit (1);
}
return 0;
return 0;
}
/*
@@ -146,25 +136,22 @@ sem_signal(int sid)
*/
int
sem_remove(int sid)
sem_remove (int sid)
{
int i;
union semun dummy;
if ((i = semctl(sid, 0, IPC_RMID, dummy)) < 0)
{
switch(i)
{
case EIDRM:
/* semaphore removed */
return 0;
break;
default:
perror("semctl, removing semaphore");
exit(1);
}
}
int i;
union semun dummy;
return 0;
if ((i = semctl (sid, 0, IPC_RMID, dummy)) < 0) {
switch (i) {
case EIDRM:
/* semaphore removed */
return 0;
break;
default:
perror ("semctl, removing semaphore");
exit (1);
}
}
return 0;
}