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/* -*- mode: c; c-file-style: "bsd"; -*- */
/*
Copyright (C) 2001-2003 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __jack_engine_h__
#define __jack_engine_h__
#include <jack/jack.h>
#include <jack/internal.h>
#include <jack/driver_interface.h>
struct _jack_driver;
struct _jack_client_internal;
struct _jack_port_internal;
/* Structures is allocated by the engine in local memory to keep track
* of port buffers and connections.
*/
typedef struct {
jack_shm_info_t* shm_info;
jack_shmsize_t offset;
} jack_port_buffer_info_t;
/* The engine keeps an array of these in its local memory. */
typedef struct _jack_port_internal {
struct _jack_port_shared *shared;
JSList *connections;
jack_port_buffer_info_t *buffer_info;
} jack_port_internal_t;
/* The engine's internal port type structure. */
typedef struct _jack_port_buffer_list {
pthread_mutex_t lock; /* only lock within server */
JSList *freelist; /* list of free buffers */
jack_port_buffer_info_t *info; /* jack_buffer_info_t array */
} jack_port_buffer_list_t;
typedef struct _jack_reserved_name {
jack_client_id_t uuid;
char name[JACK_CLIENT_NAME_SIZE];
} jack_reserved_name_t;
#define JACKD_WATCHDOG_TIMEOUT 10000
#define JACKD_CLIENT_EVENT_TIMEOUT 2000
/* The main engine structure in local memory. */
struct _jack_engine {
jack_control_t *control;
JSList *drivers;
struct _jack_driver *driver;
jack_driver_desc_t *driver_desc;
JSList *driver_params;
/* these are "callbacks" made by the driver backend */
int (*set_buffer_size) (struct _jack_engine *, jack_nframes_t frames);
int (*set_sample_rate) (struct _jack_engine *, jack_nframes_t frames);
int (*run_cycle) (struct _jack_engine *, jack_nframes_t nframes,
float delayed_usecs);
void (*delay) (struct _jack_engine *, float delayed_usecs);
void (*transport_cycle_start) (struct _jack_engine *, jack_time_t time);
void (*driver_exit) (struct _jack_engine *);
/* "private" sections starts here */
/* engine serialization -- use precedence for deadlock avoidance */
pthread_mutex_t request_lock; /* precedes client_lock */
pthread_rwlock_t client_lock;
pthread_mutex_t port_lock;
pthread_mutex_t problem_lock; /* must hold write lock on client_lock */
int process_errors;
int period_msecs;
/* Time to wait for clients in msecs. Used when jackd is run
* without realtime priority enabled. */
int client_timeout_msecs;
/* info on the shm segment containing this->control */
jack_shm_info_t control_shm;
/* address-space local port buffer and segment info,
indexed by the port type_id
*/
jack_port_buffer_list_t port_buffers[JACK_MAX_PORT_TYPES];
jack_shm_info_t port_segment[JACK_MAX_PORT_TYPES];
unsigned int port_max;
pthread_t server_thread;
pthread_t watchdog_thread;
int fds[2];
int cleanup_fifo[2];
jack_client_id_t next_client_id;
size_t pfd_size;
size_t pfd_max;
struct pollfd *pfd;
char fifo_prefix[PATH_MAX+1];
int *fifo;
unsigned long fifo_size;
/* session handling */
int session_reply_fd;
int session_pending_replies;
unsigned long external_client_cnt;
int rtpriority;
volatile char freewheeling;
volatile char stop_freewheeling;
jack_client_id_t fwclient;
pthread_t freewheel_thread;
char verbose;
char do_munlock;
const char *server_name;
char temporary;
int reordered;
int watchdog_check;
int feedbackcount;
int removing_clients;
pid_t wait_pid;
int nozombies;
volatile int problems;
/* these lists are protected by `client_lock' */
JSList *clients;
JSList *clients_waiting;
JSList *reserved_client_names;
jack_port_internal_t *internal_ports;
jack_client_internal_t *timebase_client;
jack_port_buffer_info_t *silent_buffer;
jack_client_internal_t *current_client;
#define JACK_ENGINE_ROLLING_COUNT 32
#define JACK_ENGINE_ROLLING_INTERVAL 1024
jack_time_t rolling_client_usecs[JACK_ENGINE_ROLLING_COUNT];
int rolling_client_usecs_cnt;
int rolling_client_usecs_index;
int rolling_interval;
float max_usecs;
float spare_usecs;
int first_wakeup;
#ifdef JACK_USE_MACH_THREADS
/* specific resources for server/client real-time thread communication */
mach_port_t servertask, bp;
int portnum;
#endif
/* used for port names munging */
int audio_out_cnt;
int audio_in_cnt;
int midi_out_cnt;
int midi_in_cnt;
};
/* public functions */
jack_engine_t *jack_engine_new (int real_time, int real_time_priority,
int do_mlock, int do_unlock,
const char *server_name, int temporary,
int verbose, int client_timeout,
unsigned int port_max,
pid_t waitpid, jack_nframes_t frame_time_offset, int nozombies,
JSList *drivers);
void jack_engine_delete (jack_engine_t *);
int jack_run (jack_engine_t *engine);
int jack_wait (jack_engine_t *engine);
int jack_engine_load_driver (jack_engine_t *engine,
jack_driver_desc_t * driver_desc,
JSList * driver_params);
void jack_dump_configuration(jack_engine_t *engine, int take_lock);
/* private engine functions */
void jack_engine_reset_rolling_usecs (jack_engine_t *engine);
int internal_client_request (void* ptr, jack_request_t *request);
int jack_get_fifo_fd (jack_engine_t *engine,
unsigned int which_fifo);
extern jack_timer_type_t clock_source;
extern jack_client_internal_t *
jack_client_internal_by_id (jack_engine_t *engine, jack_client_id_t id);
#define jack_rdlock_graph(e) { DEBUG ("acquiring graph read lock"); if (pthread_rwlock_rdlock (&e->client_lock)) abort(); }
#define jack_lock_graph(e) { DEBUG ("acquiring graph write lock"); if (pthread_rwlock_wrlock (&e->client_lock)) abort(); }
#define jack_try_rdlock_graph(e) pthread_rwlock_tryrdlock (&e->client_lock)
#define jack_unlock_graph(e) { DEBUG ("release graph lock"); if (pthread_rwlock_unlock (&e->client_lock)) abort(); }
#define jack_trylock_problems(e) pthread_mutex_trylock (&e->problem_lock)
#define jack_lock_problems(e) { DEBUG ("acquiring problem lock"); if (pthread_mutex_lock (&e->problem_lock)) abort(); }
#define jack_unlock_problems(e) { DEBUG ("release problem lock"); if (pthread_mutex_unlock (&e->problem_lock)) abort(); }
#if 0
static inline void jack_rdlock_graph (jack_engine_t* engine) {
DEBUG ("acquiring graph read lock");
pthread_rwlock_rdlock (&engine->client_lock);
}
static inline void jack_lock_graph (jack_engine_t* engine) {
DEBUG ("acquiring graph lock");
pthread_rwlock_wrlock (&engine->client_lock);
}
static inline int jack_try_rdlock_graph (jack_engine_t *engine)
{
DEBUG ("TRYING to acquiring graph read lock");
return pthread_rwlock_tryrdlock (&engine->client_lock);
}
static inline void jack_unlock_graph (jack_engine_t* engine)
{
DEBUG ("releasing graph lock");
pthread_rwlock_unlock (&engine->client_lock);
}
#endif
static inline unsigned int jack_power_of_two (unsigned int n)
{
return !(n & (n - 1));
}
/* Internal port handling interfaces for JACK engine. */
void jack_port_clear_connections (jack_engine_t *engine,
jack_port_internal_t *port);
void jack_port_registration_notify (jack_engine_t *, jack_port_id_t, int);
void jack_port_release (jack_engine_t *engine, jack_port_internal_t *);
void jack_sort_graph (jack_engine_t *engine);
int jack_stop_freewheeling (jack_engine_t* engine, int engine_exiting);
jack_client_internal_t *
jack_client_by_name (jack_engine_t *engine, const char *name);
#endif /* __jack_engine_h__ */
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