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Make the fds[] realloc O(n). Also make the rethreading a lot simpler.

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This commit is contained in:
mycroft 2000-12-05 21:57:20 +00:00
parent ac80517816
commit b91d3efb9a
1 changed files with 12 additions and 24 deletions
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36
usr.bin/make/job.c
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@ -1,4 +1,4 @@
/* $NetBSD: job.c,v 1.38 2000/12/05 15:28:55 sommerfeld Exp $ */
/* $NetBSD: job.c,v 1.39 2000/12/05 21:57:20 mycroft Exp $ */
/*
* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
@ -39,14 +39,14 @@
*/
#ifdef MAKE_BOOTSTRAP
static char rcsid[] = "$NetBSD: job.c,v 1.38 2000/12/05 15:28:55 sommerfeld Exp $";
static char rcsid[] = "$NetBSD: job.c,v 1.39 2000/12/05 21:57:20 mycroft Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)job.c 8.2 (Berkeley) 3/19/94";
#else
__RCSID("$NetBSD: job.c,v 1.38 2000/12/05 15:28:55 sommerfeld Exp $");
__RCSID("$NetBSD: job.c,v 1.39 2000/12/05 21:57:20 mycroft Exp $");
#endif
#endif /* not lint */
#endif
@ -253,7 +253,7 @@ static void watchfd __P((Job *));
static void clearfd __P((Job *));
static int readyfd __P((Job *));
#define JBSTART 256
#define JBINCR 256
#define JBFACTOR 2
#endif
#endif
@ -3245,6 +3245,7 @@ static void
watchfd(job)
Job *job;
{
int i;
if (job->inPollfd != NULL)
Punt("Watching watched job");
if (fds == NULL) {
@ -3252,31 +3253,18 @@ watchfd(job)
fds = emalloc(sizeof(struct pollfd) * maxfds);
jobfds = emalloc(sizeof(Job **) * maxfds);
} else if (nfds == maxfds) {
struct pollfd *newfds;
maxfds += JBINCR;
newfds = erealloc(fds, sizeof(struct pollfd) * maxfds);
maxfds *= JBFACTOR;
fds = erealloc(fds, sizeof(struct pollfd) * maxfds);
jobfds = erealloc(jobfds, sizeof(Job **) * maxfds);
if (newfds != fds) {
/* Re-thread for the new allocated pointer */
LstNode ln;
if (Lst_Open(jobs) == FAILURE) {
Punt("Cannot open job table");
}
while ((ln = Lst_Next(jobs)) != NILLNODE) {
Job *jb = (Job *) Lst_Datum(ln);
int i = jb->inPollfd - fds;
jb->inPollfd = &newfds[i];
jobfds[i] = jb;
}
Lst_Close(jobs);
}
fds = newfds;
for (i = 0; i < nfds; i++)
jobfds[i]->inPollfd = &fds[i];
}
fds[nfds].fd = job->inPipe;
job->inPollfd = &fds[nfds];
fds[nfds].events = POLLIN;
jobfds[nfds] = job;
fds[nfds++].events = POLLIN;
job->inPollfd = &fds[nfds];
nfds++;
}
static void