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#include "dirvec.h"
#include "directory.h"
#include "os_compat.h"
#include "utils.h"
static pthread_mutex_t nr_lock = PTHREAD_MUTEX_INITIALIZER;
static size_t dv_size(struct dirvec *dv)
{
return dv->nr * sizeof(struct directory *);
}
/* Only used for sorting/searching a dirvec, not general purpose compares */
static int dirvec_cmp(const void *d1, const void *d2)
{
const struct directory *a = ((const struct directory * const *)d1)[0];
const struct directory *b = ((const struct directory * const *)d2)[0];
return strcmp(a->path, b->path);
}
struct directory *dirvec_find(const struct dirvec *dv, const char *path)
{
int i;
struct directory *ret = NULL;
pthread_mutex_lock(&nr_lock);
for (i = dv->nr; --i >= 0; ) {
if (strcmp(dv->base[i]->path, path))
continue;
ret = dv->base[i];
break;
}
pthread_mutex_unlock(&nr_lock);
return ret;
}
int dirvec_delete(struct dirvec *dv, struct directory *del)
{
int i;
pthread_mutex_lock(&nr_lock);
for (i = dv->nr; --i >= 0; ) {
if (dv->base[i] != del)
continue;
/* we _don't_ call directory_free() here */
if (!--dv->nr) {
pthread_mutex_unlock(&nr_lock);
free(dv->base);
dv->base = NULL;
return i;
} else {
memmove(&dv->base[i], &dv->base[i + 1],
(dv->nr - i + 1) * sizeof(struct directory *));
dv->base = xrealloc(dv->base, dv_size(dv));
}
break;
}
pthread_mutex_unlock(&nr_lock);
return i;
}
void dirvec_add(struct dirvec *dv, struct directory *add)
{
size_t old_nr;
pthread_mutex_lock(&nr_lock);
old_nr = dv->nr++;
dv->base = xrealloc(dv->base, dv_size(dv));
dv->base[old_nr] = add;
if (old_nr && dirvec_cmp(&dv->base[old_nr - 1], &add) >= 0)
qsort(dv->base, dv->nr, sizeof(struct directory *), dirvec_cmp);
pthread_mutex_unlock(&nr_lock);
}
void dirvec_destroy(struct dirvec *dv)
{
pthread_mutex_lock(&nr_lock);
dv->nr = 0;
pthread_mutex_unlock(&nr_lock);
if (dv->base) {
free(dv->base);
dv->base = NULL;
}
}
int dirvec_for_each(const struct dirvec *dv,
int (*fn)(struct directory *, void *), void *arg)
{
size_t i;
size_t prev_nr;
pthread_mutex_lock(&nr_lock);
for (i = 0; i < dv->nr; ) {
struct directory *dir = dv->base[i];
assert(dir);
prev_nr = dv->nr;
pthread_mutex_unlock(&nr_lock);
if (fn(dir, arg) < 0)
return -1;
pthread_mutex_lock(&nr_lock); /* dv->nr may change in fn() */
if (prev_nr == dv->nr)
++i;
}
pthread_mutex_unlock(&nr_lock);
return 0;
}
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