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optimise structure size calculation to take alignment into account

This commit is contained in:
tg 2017-08-08 14:29:23 +00:00
parent d8d8ec4466
commit 1fa38c9c2c
1 changed files with 20 additions and 7 deletions
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27
jobs.c
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@ -23,7 +23,7 @@
#include "sh.h"
__RCSID("$MirOS: src/bin/mksh/jobs.c,v 1.122 2017/04/27 19:33:50 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/jobs.c,v 1.123 2017/08/08 14:29:23 tg Exp $");
#if HAVE_KILLPG
#define mksh_killpg killpg
@ -39,14 +39,27 @@ __RCSID("$MirOS: src/bin/mksh/jobs.c,v 1.122 2017/04/27 19:33:50 tg Exp $");
#define PSTOPPED 3
typedef struct proc Proc;
struct proc {
Proc *next; /* next process in pipeline (if any) */
pid_t pid; /* process id */
/* to take alignment into consideration */
struct proc_dummy {
Proc *next;
pid_t pid;
int state;
int status; /* wait status */
int status;
char command[128];
};
/* real structure */
struct proc {
/* next process in pipeline (if any) */
Proc *next;
/* process id of this Unix process in the job */
pid_t pid;
/* one of the four P… above */
int state;
/* wait status */
int status;
/* process command string from vistree */
char command[256 - (ALLOC_OVERHEAD + sizeof(Proc *) +
sizeof(pid_t) + 2 * sizeof(int))];
char command[256 - (ALLOC_OVERHEAD +
offsetof(struct proc_dummy, command[0]))];
};
/* Notify/print flag - j_print() argument */