5b82ffc291
After we've been hit by Large File Support problems several times in the past week (which only occur on 32 bit platforms, which I don't have), this is yet another attempt to fix the issue.
154 lines
3.4 KiB
C
154 lines
3.4 KiB
C
/*
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* Copyright (C) 2003-2009 The Music Player Daemon Project
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* http://www.musicpd.org
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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; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "dirvec.h"
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#include "directory.h"
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#include <glib.h>
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#include <assert.h>
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#include <string.h>
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#include <stdlib.h>
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static GMutex *nr_lock = NULL;
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static size_t dv_size(const struct dirvec *dv)
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{
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return dv->nr * sizeof(struct directory *);
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}
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/* Only used for sorting/searching a dirvec, not general purpose compares */
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static int dirvec_cmp(const void *d1, const void *d2)
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{
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const struct directory *a = ((const struct directory * const *)d1)[0];
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const struct directory *b = ((const struct directory * const *)d2)[0];
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return g_utf8_collate(a->path, b->path);
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}
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void dirvec_init(void)
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{
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g_assert(nr_lock == NULL);
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nr_lock = g_mutex_new();
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}
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void dirvec_deinit(void)
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{
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g_assert(nr_lock != NULL);
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g_mutex_free(nr_lock);
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nr_lock = NULL;
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}
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void dirvec_sort(struct dirvec *dv)
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{
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g_mutex_lock(nr_lock);
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qsort(dv->base, dv->nr, sizeof(struct directory *), dirvec_cmp);
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g_mutex_unlock(nr_lock);
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}
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struct directory *dirvec_find(const struct dirvec *dv, const char *path)
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{
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char *base;
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int i;
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struct directory *ret = NULL;
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base = g_path_get_basename(path);
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g_mutex_lock(nr_lock);
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for (i = dv->nr; --i >= 0; )
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if (!strcmp(directory_get_name(dv->base[i]), base)) {
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ret = dv->base[i];
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break;
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}
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g_mutex_unlock(nr_lock);
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g_free(base);
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return ret;
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}
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int dirvec_delete(struct dirvec *dv, struct directory *del)
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{
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size_t i;
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g_mutex_lock(nr_lock);
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for (i = 0; i < dv->nr; ++i) {
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if (dv->base[i] != del)
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continue;
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/* we _don't_ call directory_free() here */
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if (!--dv->nr) {
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g_mutex_unlock(nr_lock);
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g_free(dv->base);
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dv->base = NULL;
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return i;
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} else {
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memmove(&dv->base[i], &dv->base[i + 1],
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(dv->nr - i) * sizeof(struct directory *));
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dv->base = g_realloc(dv->base, dv_size(dv));
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}
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break;
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}
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g_mutex_unlock(nr_lock);
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return i;
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}
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void dirvec_add(struct dirvec *dv, struct directory *add)
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{
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g_mutex_lock(nr_lock);
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++dv->nr;
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dv->base = g_realloc(dv->base, dv_size(dv));
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dv->base[dv->nr - 1] = add;
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g_mutex_unlock(nr_lock);
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}
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void dirvec_destroy(struct dirvec *dv)
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{
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g_mutex_lock(nr_lock);
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dv->nr = 0;
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g_mutex_unlock(nr_lock);
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if (dv->base) {
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g_free(dv->base);
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dv->base = NULL;
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}
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}
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int dirvec_for_each(const struct dirvec *dv,
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int (*fn)(struct directory *, void *), void *arg)
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{
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size_t i;
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size_t prev_nr;
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g_mutex_lock(nr_lock);
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for (i = 0; i < dv->nr; ) {
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struct directory *dir = dv->base[i];
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assert(dir);
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prev_nr = dv->nr;
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g_mutex_unlock(nr_lock);
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if (fn(dir, arg) < 0)
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return -1;
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g_mutex_lock(nr_lock); /* dv->nr may change in fn() */
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if (prev_nr == dv->nr)
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++i;
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}
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g_mutex_unlock(nr_lock);
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return 0;
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}
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