56 lines
2.7 KiB
C
56 lines
2.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/log/check.h"
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#include "libc/mem/mem.h"
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#include "libc/x/x.h"
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#include "tool/build/lib/fds.h"
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int MachineFdAdd(struct MachineFds *mf) {
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int fd;
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struct MachineFdClosed *closed;
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if ((closed = mf->closed)) {
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DCHECK_LT(closed->fd, mf->i);
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fd = closed->fd;
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mf->closed = closed->next;
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free(closed);
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} else {
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DCHECK_LE(mf->i, mf->n);
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if (mf->i == mf->n) {
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if (!grow(&mf->p, &mf->n, sizeof(struct MachineFd), 0)) {
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return -1;
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}
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}
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fd = mf->i++;
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}
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return fd;
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}
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void MachineFdRemove(struct MachineFds *mf, int fd) {
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struct MachineFdClosed *closed;
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DCHECK_GE(fd, 0);
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DCHECK_LT(fd, mf->i);
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mf->p[fd].cb = NULL;
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if ((closed = malloc(sizeof(struct MachineFdClosed)))) {
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closed->fd = fd;
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closed->next = mf->closed;
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mf->closed = closed;
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}
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}
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