/** \mainpage Paraslash API Reference
*
- * Good starting points for reading are probably \ref dbtool, \ref sender,
- * \ref receiver, \ref receiver_node, \ref filter, \ref filter_node.
+ * Good starting points for reading are probably \ref audio_file_selector,
+ * \ref sender, \ref receiver, \ref receiver_node, \ref filter, \ref
+ * filter_node.
*
*/
#include "afs.h"
#include "config.h"
#include "close_on_fork.h"
-#include <sys/mman.h> /* MAP_SHARED, PROT_READ, PROT_WRITE */
#include "send.h"
#include "error.h"
#include "net.h"
#include "daemon.h"
#include "string.h"
+#include "ipc.h"
/** define the array of error lists needed by para_server */
INIT_SERVER_ERRLISTS;
/** shut down non-authorized connections after that many seconds */
#define ALARM_TIMEOUT 10
-/* these are exported to afs/command/dbtool */
+/* these are exported to afs.c. command.c and to all selectors */
struct misc_meta_data *mmd;
/** the configuration of para_server
*
- * It also contains the options for all database tools and all supported
+ * It also contains the options for all audio file selectors and all supported
* senders.
*/
struct gengetopt_args_info conf;
extern void ortp_send_init(struct sender *);
extern struct audio_format afl[];
-/** the list of supported database tools */
-struct dbtool dblist[] = {
+/** the list of supported audio file selectors */
+struct audio_file_selector dblist[] = {
{
.name = "random",
- .init = random_dbtool_init,
+ .init = random_selector_init,
.update_audio_file = NULL,
},
+ {
+ .name = "playlist",
+ .init = playlist_selector_init,
+ .update_audio_file = NULL,
+ .pre_select = NULL,
+ .post_select = NULL,
+ },
#ifdef HAVE_MYSQL
{
.name = "mysql",
- .init = mysql_dbtool_init,
+ .init = mysql_selector_init,
.update_audio_file = NULL,
+ .pre_select = NULL,
+ .post_select = NULL,
},
#endif
{
/* global variables for server-internal use */
static FILE *logfile;
-static int mmd_semid;
+static int mmd_mutex, mmd_shm_id;
static int signal_pipe;
/**
va_end(argp);
}
-
/*
- * setup shared memory area and get semaphore for locking
+ * setup shared memory area and get mutex for locking
*/
static void shm_init(void)
{
- int fd;
- caddr_t area;
+ void *shm;
+ int ret = shm_new(sizeof(struct misc_meta_data));
- if ((fd = open("/dev/zero", O_RDWR)) < 0) {
- PARA_EMERG_LOG("%s", "failed to open /dev/zero\n");
- exit(EXIT_FAILURE);
- }
- if ((area = mmap(0, sizeof(struct misc_meta_data),
- PROT_READ | PROT_WRITE,
- MAP_SHARED, fd, 0)) == (caddr_t) - 1) {
- PARA_EMERG_LOG("%s", "mmap error\n");
- exit(EXIT_FAILURE);
- }
- close(fd); /* we dont need /dev/zero anymore */
- mmd = (struct misc_meta_data *)area;
+ if (ret < 0)
+ goto err_out;
+
+ ret = shm_attach(ret, ATTACH_RW, &shm);
+ if (ret < 0)
+ goto err_out;
+ mmd = shm;
+ mmd_shm_id = ret;
+
+ ret = mutex_new();
+ if (ret < 0)
+ goto err_out;
+ mmd_mutex = ret;
mmd->dbt_num = 0;
mmd->num_played = 0;
mmd->afs_status_flags = AFS_NEXT;
mmd->new_afs_status_flags = AFS_NEXT;
mmd->sender_cmd_data.cmd_num = -1;
-
- mmd_semid = semget(42, 1, IPC_CREAT | 0666);
- if (mmd_semid == -1) {
- PARA_EMERG_LOG("%s", "semget failed\n");
- exit(EXIT_FAILURE);
- }
-}
-
-static void do_semop(struct sembuf *sops, int num)
-{
- if (semop(mmd_semid, sops, num) >= 0)
- return;
- PARA_WARNING_LOG("semop failed (%s), retrying\n", strerror(errno));
- while (semop(mmd_semid, sops, num) < 0)
- ; /* nothing */
+ return;
+err_out:
+ PARA_EMERG_LOG("%s", PARA_STRERROR(-ret));
+ exit(EXIT_FAILURE);
}
/**
*/
void mmd_lock(void)
{
- struct sembuf sops[2] = {
- {
- .sem_num = 0,
- .sem_op = 0,
- .sem_flg = SEM_UNDO
- },
- {
- .sem_num = 0,
- .sem_op = 1,
- .sem_flg = SEM_UNDO
- }
- };
- do_semop(sops, 2);
+ mutex_lock(mmd_mutex);
}
/**
*
* \sa semop(2), struct misc_meta_data
*/
+
void mmd_unlock(void)
{
- struct sembuf sops[1] = {
- {
- .sem_num = 0,
- .sem_op = -1,
- .sem_flg = SEM_UNDO
- },
- };
- do_semop(sops, 1);
+ mutex_unlock(mmd_mutex);
}
static void parse_config(int override)
ret += para_install_sighandler(SIGTERM);
ret += para_install_sighandler(SIGHUP);
ret += para_install_sighandler(SIGCHLD);
+ ret += para_install_sighandler(SIGUSR1);
signal(SIGPIPE, SIG_IGN);
- signal(SIGUSR1, SIG_IGN);
- if (ret != 4) {
+ if (ret != 5) {
PARA_EMERG_LOG("%s", "could not install signal handlers\n");
exit(EXIT_FAILURE);
}
}
-static void init_dbtool(void)
+static void init_selector(void)
{
- int i;
+ int i, ret;
mmd->dbt_change = -1; /* no change nec., set to new dbt num by com_cdt */
- if (!dblist[1].name)
- goto random;
- if (conf.dbtool_given) {
- for (i = 0; dblist[i].name; i++) {
- if (strcmp(dblist[i].name, conf.dbtool_arg))
- continue;
- PARA_NOTICE_LOG("initializing %s database tool\n",
- dblist[i].name);
- if (dblist[i].init(&dblist[i]) < 0) {
- PARA_WARNING_LOG("init %s failed",
- dblist[i].name);
- goto random;
- }
- mmd->dbt_num = i;
- return;
- }
- PARA_WARNING_LOG("%s", "no such dbtool, switching to random\n");
+ if (!conf.selector_given)
goto random;
- }
- /* use the first dbtool that works
- * (assuming that random always works)
- */
- for (i = 1; dblist[i].name; i++) {
- int ret = dblist[i].init(&dblist[i]);
- if (ret >= 0) {
- PARA_INFO_LOG("initialized %s\n", dblist[i].name);
- mmd->dbt_num = i;
- return;
+ for (i = 0; dblist[i].name; i++) {
+ if (strcmp(dblist[i].name, conf.selector_arg))
+ continue;
+ PARA_NOTICE_LOG("initializing %s audio file selector\n",
+ dblist[i].name);
+ ret = dblist[i].init(&dblist[i]);
+ if (ret < 0) {
+ PARA_WARNING_LOG("%s", PARA_STRERROR(-ret));
+ break;
}
- PARA_CRIT_LOG("%s init failed: %s\n", dblist[i].name,
- PARA_STRERROR(-ret));
+ mmd->dbt_num = i;
+ return;
}
+ PARA_WARNING_LOG("%s", "falling back to the random selector\n");
random:
mmd->dbt_num = 0;
dblist[0].init(&dblist[0]); /* always successful */
/* become daemon */
if (conf.daemon_given)
daemon_init();
- init_dbtool();
+ init_selector();
PARA_NOTICE_LOG("%s", "initializing audio file sender\n");
/* audio file sender */
afs_init();
return;
}
/* init failed */
- PARA_ERROR_LOG("%s -- switching to the random dbtool\n", PARA_STRERROR(-ret));
+ PARA_ERROR_LOG("%s -- switching to the random selector\n", PARA_STRERROR(-ret));
dblist[0].init(&dblist[0]);
mmd->dbt_num = 0;
}
close_log(logfile); /* gets reopened if necessary by parse_config */
logfile = NULL;
parse_config(1); /* reopens log */
- mmd->dbt_change = mmd->dbt_num; /* do not change dbtool */
- handle_dbt_change(); /* force reloading dbtool */
+ mmd->dbt_change = mmd->dbt_num; /* do not change selector */
+ handle_dbt_change(); /* reload selector */
}
static void status_refresh(void)
&max_fileno,
&rfds, &wfds);
}
+ if (dblist[mmd->dbt_num].pre_select) {
+ ret = dblist[mmd->dbt_num].pre_select(&rfds, &wfds);
+ max_fileno = MAX(max_fileno, ret);
+ }
mmd_unlock();
// PARA_DEBUG_LOG("%s: select (max = %i)\n", __func__, max_fileno);
ret = select(max_fileno + 1, &rfds, &wfds, NULL, timeout);
mmd_lock();
if (mmd->dbt_change >= 0)
handle_dbt_change();
+ if (dblist[mmd->dbt_num].post_select)
+ dblist[mmd->dbt_num].post_select(&rfds, &wfds);
if (ret < 0 && err == EINTR)
goto repeat;
if (ret < 0) {
case SIGTERM:
PARA_EMERG_LOG("terminating on signal %d\n", sig);
kill(0, SIGTERM);
+ dblist[mmd->dbt_num].shutdown();
+ mutex_destroy(mmd_mutex);
+ shm_detach(mmd);
+ shm_destroy(mmd_shm_id);
exit(EXIT_FAILURE);
}
}
projects / paraslash.git / blobdiff