You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

191 lines
3.4 KiB

/* -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 8; -*- */
#include "libburn.h"
#include "transport.h"
#include "drive.h"
#include "write.h"
#include "options.h"
#include "async.h"
#include <pthread.h>
#include <assert.h>
#include <stdlib.h>
#define SCAN_GOING() (workers && !workers->drive)
typedef void *(*WorkerFunc) (void *);
struct scan_opts
{
struct burn_drive_info **drives;
unsigned int *n_drives;
int done;
};
struct erase_opts
{
struct burn_drive *drive;
int fast;
};
struct write_opts
{
struct burn_drive *drive;
struct burn_write_opts *opts;
struct burn_disc *disc;
};
struct w_list
{
struct burn_drive *drive;
pthread_t thread;
struct w_list *next;
union w_list_data
{
struct scan_opts scan;
struct erase_opts erase;
struct write_opts write;
} u;
};
static struct w_list *workers;
static struct w_list *find_worker(struct burn_drive *d)
{
struct w_list *a;
for (a = workers; a; a = a->next)
if (a->drive == d)
return a;
return NULL;
}
static void add_worker(struct burn_drive *d, WorkerFunc f, void *data)
{
struct w_list *a;
struct w_list *tmp;
a = malloc(sizeof(struct w_list));
a->drive = d;
a->u = *(union w_list_data *)data;
/* insert at front of the list */
a->next = workers;
tmp = workers;
workers = a;
if (d)
d->busy = BURN_DRIVE_SPAWNING;
if (pthread_create(&a->thread, NULL, f, a)) {
free(a);
workers = tmp;
return;
}
}
static void remove_worker(pthread_t th)
{
struct w_list *a, *l = NULL;
for (a = workers; a; l = a, a = a->next)
if (a->thread == th) {
if (l)
l->next = a->next;
else
workers = a->next;
free(a);
break;
}
assert(a != NULL); /* wasn't found.. this should not be possible */
}
static void *scan_worker_func(struct w_list *w)
{
burn_drive_scan_sync(w->u.scan.drives, w->u.scan.n_drives);
w->u.scan.done = 1;
return NULL;
}
int burn_drive_scan(struct burn_drive_info *drives[], unsigned int *n_drives)
{
struct scan_opts o;
int ret = 0;
/* cant be anything working! */
assert(!(workers && workers->drive));
if (!workers) {
/* start it */
o.drives = drives;
o.n_drives = n_drives;
o.done = 0;
add_worker(NULL, (WorkerFunc) scan_worker_func, &o);
} else if (workers->u.scan.done) {
/* its done */
ret = workers->u.scan.done;
remove_worker(workers->thread);
assert(workers == NULL);
} else {
/* still going */
}
return ret;
}
static void *erase_worker_func(struct w_list *w)
{
burn_disc_erase_sync(w->u.erase.drive, w->u.erase.fast);
remove_worker(pthread_self());
return NULL;
}
void burn_disc_erase(struct burn_drive *drive, int fast)
{
struct erase_opts o;
assert(drive);
assert(!SCAN_GOING());
assert(!find_worker(drive));
o.drive = drive;
o.fast = fast;
add_worker(drive, (WorkerFunc) erase_worker_func, &o);
}
static void *write_disc_worker_func(struct w_list *w)
{
burn_disc_write_sync(w->u.write.opts, w->u.write.disc);
/* the options are refcounted, free out ref count which we added below
*/
burn_write_opts_free(w->u.write.opts);
remove_worker(pthread_self());
return NULL;
}
void burn_disc_write(struct burn_write_opts *opts, struct burn_disc *disc)
{
struct write_opts o;
assert(!SCAN_GOING());
assert(!find_worker(opts->drive));
o.drive = opts->drive;
o.opts = opts;
o.disc = disc;
opts->refcount++;
add_worker(opts->drive, (WorkerFunc) write_disc_worker_func, &o);
}
void burn_async_join_all(void)
{
void *ret;
while (workers)
pthread_join(workers->thread, &ret);
}