/* 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 Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. $Id$ */ #if defined(__APPLE__) && defined(__POWERPC__) #include "pThreadUtilities.h" #include "ipc.h" #include "fakepoll.h" #else #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "local.h" #ifdef WITH_TIMESTAMPS #include #endif /* WITH_TIMESTAMPS */ #ifdef DEFAULT_TMP_DIR char *jack_server_dir = DEFAULT_TMP_DIR; #else char *jack_server_dir = "/tmp"; #endif void jack_set_server_dir (const char *path) { jack_server_dir = strdup (path); } static pthread_mutex_t client_lock; static pthread_cond_t client_ready; void *jack_zero_filled_buffer = 0; #define event_fd pollfd[0].fd #define graph_wait_fd pollfd[1].fd typedef struct { int status; struct _jack_client *client; const char *client_name; } client_info; void jack_error (const char *fmt, ...) { va_list ap; char buffer[300]; va_start (ap, fmt); vsnprintf (buffer, sizeof(buffer), fmt, ap); jack_error_callback (buffer); va_end (ap); } void default_jack_error_callback (const char *desc) { fprintf(stderr, "%s\n", desc); } void (*jack_error_callback)(const char *desc) = &default_jack_error_callback; static int oop_client_deliver_request (void *ptr, jack_request_t *req) { jack_client_t *client = (jack_client_t*) ptr; if (write (client->request_fd, req, sizeof (*req)) != sizeof (*req)) { jack_error ("cannot send request type %d to server", req->type); req->status = -1; } if (read (client->request_fd, req, sizeof (*req)) != sizeof (*req)) { jack_error ("cannot read result for request type %d from server (%s)", req->type, strerror (errno)); req->status = -1; } return req->status; } int jack_client_deliver_request (const jack_client_t *client, jack_request_t *req) { /* indirect through the function pointer that was set either by jack_client_new() (external) or handle_new_client() in the server. */ return client->control->deliver_request (client->control->deliver_arg, req); } jack_client_t * jack_client_alloc () { jack_client_t *client; client = (jack_client_t *) malloc (sizeof (jack_client_t)); client->pollfd = (struct pollfd *) malloc (sizeof (struct pollfd) * 2); client->pollmax = 2; client->request_fd = -1; client->event_fd = -1; client->graph_wait_fd = -1; client->graph_next_fd = -1; client->port_segments = NULL; client->ports = NULL; client->engine = NULL; client->control = 0; client->thread_ok = FALSE; client->first_active = TRUE; client->on_shutdown = NULL; return client; } jack_client_t * jack_client_alloc_internal (jack_client_control_t *cc, jack_control_t *ec) { jack_client_t* client; client = jack_client_alloc (); client->control = cc; client->engine = ec; return client; } static void jack_client_free (jack_client_t *client) { if (client->pollfd) { free (client->pollfd); } free (client); } void jack_client_invalidate_port_buffers (jack_client_t *client) { JSList *node; jack_port_t *port; /* This releases all local memory owned by input ports and sets the buffer pointer to NULL. This will cause jack_port_get_buffer() to reallocate space for the buffer on the next call (if there is one). */ for (node = client->ports; node; node = jack_slist_next (node)) { port = (jack_port_t *) node->data; if (port->shared->flags & JackPortIsInput) { if (port->client_segment_base == 0) { jack_pool_release ((void *) port->shared->offset); port->client_segment_base = 0; port->shared->offset = 0; } } } } int jack_client_handle_port_connection (jack_client_t *client, jack_event_t *event) { jack_port_t *control_port; jack_port_t *other; JSList *node; switch (event->type) { case PortConnected: other = jack_port_new (client, event->y.other_id, client->engine); control_port = jack_port_by_id (client, event->x.self_id); pthread_mutex_lock (&control_port->connection_lock); control_port->connections = jack_slist_prepend (control_port->connections, (void*)other); pthread_mutex_unlock (&control_port->connection_lock); break; case PortDisconnected: control_port = jack_port_by_id (client, event->x.self_id); pthread_mutex_lock (&control_port->connection_lock); for (node = control_port->connections; node; node = jack_slist_next (node)) { other = (jack_port_t *) node->data; if (other->shared->id == event->y.other_id) { control_port->connections = jack_slist_remove_link (control_port->connections, node); jack_slist_free_1 (node); free (other); break; } } pthread_mutex_unlock (&control_port->connection_lock); break; default: /* impossible */ break; } return 0; } static int jack_handle_reorder (jack_client_t *client, jack_event_t *event) { char path[PATH_MAX+1]; if (client->graph_wait_fd >= 0) { DEBUG ("closing graph_wait_fd==%d", client->graph_wait_fd); close (client->graph_wait_fd); client->graph_wait_fd = -1; } if (client->graph_next_fd >= 0) { DEBUG ("closing graph_next_fd==%d", client->graph_next_fd); close (client->graph_next_fd); client->graph_next_fd = -1; } sprintf (path, "%s-%lu", client->fifo_prefix, event->x.n); if ((client->graph_wait_fd = open (path, O_RDONLY|O_NONBLOCK)) < 0) { jack_error ("cannot open specified fifo [%s] for reading (%s)", path, strerror (errno)); return -1; } DEBUG ("opened new graph_wait_fd %d (%s)", client->graph_wait_fd, path); sprintf (path, "%s-%lu", client->fifo_prefix, event->x.n+1); if ((client->graph_next_fd = open (path, O_WRONLY|O_NONBLOCK)) < 0) { jack_error ("cannot open specified fifo [%s] for writing (%s)", path, strerror (errno)); return -1; } DEBUG ("opened new graph_next_fd %d (%s)", client->graph_next_fd, path); /* If the client registered its own callback for graph order events, execute it now. */ if (client->control->graph_order) { client->control->graph_order (client->control->graph_order_arg); } return 0; } static int server_connect (int which) { int fd; struct sockaddr_un addr; if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) { jack_error ("cannot create client socket (%s)", strerror (errno)); return -1; } addr.sun_family = AF_UNIX; snprintf (addr.sun_path, sizeof (addr.sun_path) - 1, "%s/jack_%d", jack_server_dir, which); if (connect (fd, (struct sockaddr *) &addr, sizeof (addr)) < 0) { jack_error ("cannot connect to jack server", strerror (errno)); close (fd); return -1; } return fd; } static int server_event_connect (jack_client_t *client) { int fd; struct sockaddr_un addr; jack_client_connect_ack_request_t req; jack_client_connect_ack_result_t res; if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) { jack_error ("cannot create client event socket (%s)", strerror (errno)); return -1; } addr.sun_family = AF_UNIX; snprintf (addr.sun_path, sizeof (addr.sun_path) - 1, "%s/jack_ack_0", jack_server_dir); if (connect (fd, (struct sockaddr *) &addr, sizeof (addr)) < 0) { jack_error ("cannot connect to jack server for events", strerror (errno)); close (fd); return -1; } req.client_id = client->control->id; if (write (fd, &req, sizeof (req)) != sizeof (req)) { jack_error ("cannot write event connect request to server (%s)", strerror (errno)); close (fd); return -1; } if (read (fd, &res, sizeof (res)) != sizeof (res)) { jack_error ("cannot read event connect result from server (%s)", strerror (errno)); close (fd); return -1; } if (res.status != 0) { close (fd); return -1; } return fd; } static int jack_request_client (ClientType type, const char* client_name, const char* so_name, const char* so_data, jack_client_connect_result_t *res, int *req_fd) { jack_client_connect_request_t req; *req_fd = -1; memset (&req, 0, sizeof (req)); if (strlen (client_name) > sizeof (req.name) - 1) { jack_error ("\"%s\" is too long to be used as a JACK client name.\n" "Please use %lu characters or less.", client_name, sizeof (req.name) - 1); return -1; } if (strlen (so_name) > sizeof (req.object_path) - 1) { jack_error ("\"%s\" is too long to be used as a JACK shared object name.\n" "Please use %lu characters or less.", so_name, sizeof (req.object_path) - 1); return -1; } if (strlen (so_data) > sizeof (req.object_data) - 1) { jack_error ("\"%s\" is too long to be used as a JACK shared object data string.\n" "Please use %lu characters or less.", so_data, sizeof (req.object_data) - 1); return -1; } if ((*req_fd = server_connect (0)) < 0) { jack_error ("cannot connect to default JACK server"); goto fail; } req.load = TRUE; req.type = type; snprintf (req.name, sizeof (req.name), "%s", client_name); snprintf (req.object_path, sizeof (req.object_path), "%s", so_name); snprintf (req.object_data, sizeof (req.object_data), "%s", so_data); if (write (*req_fd, &req, sizeof (req)) != sizeof (req)) { jack_error ("cannot send request to jack server (%s)", strerror (errno)); goto fail; } if (read (*req_fd, res, sizeof (*res)) != sizeof (*res)) { if (errno == 0) { /* server shut the socket */ jack_error ("could not attach as client (duplicate client name?)"); goto fail; } jack_error ("cannot read response from jack server (%s)", strerror (errno)); goto fail; } if (res->status) { jack_error ("could not attach as client (duplicate client name?)"); goto fail; } if (res->protocol_v != jack_protocol_version){ jack_error ("application linked against too wrong of a version of libjack."); goto fail; } switch (type) { case ClientDriver: case ClientInternal: close (*req_fd); *req_fd = -1; break; default: break; } return 0; fail: if (*req_fd >= 0) { close (*req_fd); *req_fd = -1; } return -1; } jack_client_t * jack_client_new (const char *client_name) { int req_fd = -1; int ev_fd = -1; jack_client_connect_result_t res; jack_client_t *client; void *addr; int i; int shmid; jack_port_type_info_t* type_info; /* external clients need this initialized; internal clients will use the setup in the server's address space. */ jack_init_time (); if (jack_request_client (ClientExternal, client_name, "", "", &res, &req_fd)) { return NULL; } client = jack_client_alloc (); strcpy (client->fifo_prefix, res.fifo_prefix); client->request_fd = req_fd; client->pollfd[0].events = POLLIN|POLLERR|POLLHUP|POLLNVAL; client->pollfd[1].events = POLLIN|POLLERR|POLLHUP|POLLNVAL; /* attach the engine control/info block */ if ((addr = jack_get_shm (res.control_shm_name, res.control_size, O_RDWR, 0, (PROT_READ|PROT_WRITE), &shmid)) == MAP_FAILED) { jack_error ("cannot attached engine control shared memory segment"); goto fail; } client->engine = (jack_control_t *) addr; /* now attach the client control block */ if ((addr = jack_get_shm (res.client_shm_name, sizeof (jack_client_control_t), O_RDWR, 0, (PROT_READ|PROT_WRITE), &shmid)) == MAP_FAILED) { jack_error ("cannot attached client control shared memory segment"); goto fail; } client->control = (jack_client_control_t *) addr; /* nobody else needs to access this shared memory any more, so destroy it. because we have our own link to it, it won't vanish till we exit. */ jack_destroy_shm (res.client_shm_name); /* read incoming port type information so that we can get shared memory information for each one. */ type_info = (jack_port_type_info_t *) malloc (sizeof (jack_port_type_info_t) * res.n_port_types); if (read (req_fd, type_info, sizeof (jack_port_type_info_t) * res.n_port_types) != sizeof (jack_port_type_info_t) * res.n_port_types) { jack_error ("cannot read port type information during client connection"); free (type_info); goto fail; } for (i = 0; i < res.n_port_types; ++i) { jack_client_handle_new_port_type (client, type_info[i].shm_info.shm_name, type_info[i].shm_info.size, 0); } free (type_info); /* set up the client so that it does the right thing for an external client */ client->control->deliver_request = oop_client_deliver_request; client->control->deliver_arg = client; if ((ev_fd = server_event_connect (client)) < 0) { jack_error ("cannot connect to server for event stream (%s)", strerror (errno)); goto fail; } client->event_fd = ev_fd; #if defined(__APPLE__) && defined(__POWERPC__) /* specific ressources for server/client real-time thread communication */ client->clienttask = mach_task_self(); if (task_get_bootstrap_port(client->clienttask, &client->bp)){ jack_error ("Can't find bootstrap port"); goto fail; } if (allocate_mach_clientport(client, res.portnum) < 0) { jack_error("Can't allocate mach port"); goto fail; }; #endif return client; fail: if (client->engine) { munmap ((char *) client->engine, res.control_size); } if (client->control) { munmap ((char *) client->control, sizeof (jack_client_control_t)); } if (req_fd >= 0) { close (req_fd); } if (ev_fd >= 0) { close (ev_fd); } return 0; } int jack_internal_client_new (const char *client_name, const char *so_name, const char *so_data) { jack_client_connect_result_t res; int req_fd; return jack_request_client (ClientInternal, client_name, so_name, so_data, &res, &req_fd); } void jack_internal_client_close (const char *client_name) { jack_client_connect_request_t req; int fd; req.load = FALSE; snprintf (req.name, sizeof (req.name), "%s", client_name); if ((fd = server_connect (0)) < 0) { jack_error ("cannot connect to default JACK server."); return; } if (write (fd, &req, sizeof (req)) != sizeof(req)) { jack_error ("cannot deliver ClientUnload request to JACK server."); } /* no response to this request */ close (fd); return; } void jack_client_handle_new_port_type (jack_client_t *client, shm_name_t shm_name, size_t size, void* addr) { jack_port_segment_info_t *si; int shmid; /* Lookup, attach and register the port/buffer segments in use right now. */ if (client->control->type == ClientExternal) { if ((addr = jack_get_shm(shm_name, size, O_RDWR, 0, (PROT_READ|PROT_WRITE), &shmid)) == MAP_FAILED) { jack_error ("cannot attached port segment shared memory (%s)", strerror (errno)); return; } } else { /* client is in same address space as server, so just use `addr' directly */ } si = (jack_port_segment_info_t *) malloc (sizeof (jack_port_segment_info_t)); strcpy (si->shm_name, shm_name); si->address = addr; si->size = size; /* the first chunk of the first port segment is always set by the engine to be a conveniently-sized, zero-filled lump of memory. */ if (client->port_segments == NULL) { jack_zero_filled_buffer = si->address; } client->port_segments = jack_slist_prepend (client->port_segments, si); } static void * jack_client_thread (void *arg) { jack_client_t *client = (jack_client_t *) arg; jack_client_control_t *control = client->control; jack_event_t event; char status = 0; char c; int err = 0; pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, NULL); pthread_mutex_lock (&client_lock); client->thread_ok = TRUE; client->thread_id = pthread_self(); pthread_cond_signal (&client_ready); pthread_mutex_unlock (&client_lock); client->control->pid = getpid(); DEBUG ("client thread is now running"); while (err == 0) { if (client->engine->engine_ok == 0) { jack_error ("engine unexpectedly shutdown; thread exiting\n"); if (client->on_shutdown) { client->on_shutdown (client->on_shutdown_arg); } pthread_exit (0); } DEBUG ("client polling on event_fd and graph_wait_fd..."); if (poll (client->pollfd, client->pollmax, 1000) < 0) { if (errno == EINTR) { printf ("poll interrupted\n"); continue; } jack_error ("poll failed in client (%s)", strerror (errno)); status = -1; break; } pthread_testcancel(); /* get an accurate timestamp on waking from poll for a process() cycle. */ if (client->pollfd[1].revents & POLLIN) { control->awake_at = jack_get_microseconds(); } if (client->pollfd[0].revents & ~POLLIN || client->control->dead) { goto zombie; } if (client->pollfd[0].revents & POLLIN) { DEBUG ("client receives an event, now reading on event fd"); /* server has sent us an event. process the event and reply */ if (read (client->event_fd, &event, sizeof (event)) != sizeof (event)) { jack_error ("cannot read server event (%s)", strerror (errno)); err++; break; } status = 0; switch (event.type) { case PortRegistered: if (control->port_register) { control->port_register (event.x.port_id, TRUE, control->port_register_arg); } break; case PortUnregistered: if (control->port_register) { control->port_register (event.x.port_id, FALSE, control->port_register_arg); } break; case GraphReordered: status = jack_handle_reorder (client, &event); break; case PortConnected: case PortDisconnected: status = jack_client_handle_port_connection (client, &event); break; case BufferSizeChange: jack_client_invalidate_port_buffers (client); if (control->bufsize) { status = control->bufsize (control->nframes, control->bufsize_arg); } break; case SampleRateChange: if (control->srate) { status = control->srate (control->nframes, control->srate_arg); } break; case XRun: if (control->xrun) { status = control->xrun (control->xrun_arg); } break; case NewPortType: jack_client_handle_new_port_type (client, event.x.shm_name, event.z.size, event.y.addr); break; } DEBUG ("client has dealt with the event, writing response on event fd"); if (write (client->event_fd, &status, sizeof (status)) != sizeof (status)) { jack_error ("cannot send event response to engine (%s)", strerror (errno)); err++; break; } } if (client->pollfd[1].revents & POLLIN) { #ifdef WITH_TIMESTAMPS jack_reset_timestamps (); #endif DEBUG ("client %d signalled at %Lu, awake for process at %Lu (delay = %Lu usecs) (wakeup on graph_wait_fd==%d)", getpid(), control->signalled_at, control->awake_at, control->awake_at - control->signalled_at, client->pollfd[1].fd); control->state = Running; if (control->sync_cb) jack_call_sync_client (client); if (control->process) { if (control->process (control->nframes, control->process_arg) == 0) { control->state = Finished; } } else { control->state = Finished; } if (control->timebase_cb) jack_call_timebase_master (client); control->finished_at = jack_get_microseconds(); #ifdef WITH_TIMESTAMPS jack_timestamp ("finished"); #endif /* pass the execution token along */ DEBUG ("client finished processing at %Lu (elapsed = %Lu usecs), writing on graph_next_fd==%d", control->finished_at, control->finished_at - control->awake_at, client->graph_next_fd); if (write (client->graph_next_fd, &c, sizeof (c)) != sizeof (c)) { jack_error ("cannot continue execution of the processing graph (%s)", strerror(errno)); err++; break; } DEBUG ("client sent message to next stage by %Lu, client reading on graph_wait_fd==%d", jack_get_microseconds(), client->graph_wait_fd); #ifdef WITH_TIMESTAMPS jack_timestamp ("read pending byte from wait"); #endif DEBUG("reading cleanup byte from pipe\n"); if ((read (client->graph_wait_fd, &c, sizeof (c)) != sizeof (c))) { DEBUG ("WARNING: READ FAILED!"); /* jack_error ("cannot complete execution of the processing graph (%s)", strerror(errno)); err++; break; */ } /* check if we were killed during the process cycle (or whatever) */ if (client->control->dead) { goto zombie; } DEBUG("process cycle fully complete\n"); #ifdef WITH_TIMESTAMPS jack_timestamp ("read done"); jack_dump_timestamps (stdout); #endif } } return (void *) ((intptr_t)err); zombie: if (client->on_shutdown) { jack_error ("zombified - calling shutdown handler"); client->on_shutdown (client->on_shutdown_arg); } else { jack_error ("zombified - exiting from JACK"); jack_client_close (client); /* Need a fix : possibly make client crash if zombified without shutdown handler */ } pthread_exit (0); /*NOTREACHED*/ return 0; } #if defined(__APPLE__) && defined(__POWERPC__) /* real-time thread : separated from the normal client thread, it will communicate with the server using fast mach RPC mechanism */ static void * jack_client_process_thread (void *arg) { jack_client_t *client = (jack_client_t *) arg; jack_client_control_t *control = client->control; int err = 0; client->control->pid = getpid(); DEBUG ("client process thread is now running"); pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, NULL); while (err == 0) { if (jack_client_suspend(client) < 0) { pthread_exit (0); } control->awake_at = jack_get_microseconds(); DEBUG ("client resumed"); control->state = Running; if (control->process) { if (control->process (control->nframes, control->process_arg) == 0) { control->state = Finished; } } else { control->state = Finished; } control->finished_at = jack_get_microseconds(); #ifdef WITH_TIMESTAMPS jack_timestamp ("finished"); #endif DEBUG ("client finished processing at %Lu (elapsed = %f usecs)", control->finished_at, ((float)(control->finished_at - control->awake_at))); /* check if we were killed during the process cycle (or whatever) */ if (client->control->dead) { jack_error ("jack_client_process_thread : client->control->dead"); goto zombie; } DEBUG("process cycle fully complete\n"); } return (void *) ((intptr_t)err); zombie: jack_error ("jack_client_process_thread : zombified"); if (client->on_shutdown) { jack_error ("zombified - calling shutdown handler"); client->on_shutdown (client->on_shutdown_arg); } else { jack_error ("zombified - exiting from JACK"); jack_client_close (client); /* Need a fix : possibly make client crash if zombified without shutdown handler */ } pthread_exit (0); /*NOTREACHED*/ return 0; } #endif static int jack_start_thread (jack_client_t *client) { pthread_attr_t *attributes = 0; #ifdef USE_CAPABILITIES int policy = SCHED_OTHER; struct sched_param client_param, temp_param; #endif if (client->engine->real_time) { /* Get the client thread to run as an RT-FIFO scheduled thread of appropriate priority. */ struct sched_param rt_param; attributes = (pthread_attr_t *) malloc (sizeof (pthread_attr_t)); pthread_attr_init (attributes); if (pthread_attr_setschedpolicy (attributes, SCHED_FIFO)) { jack_error ("cannot set FIFO scheduling class for RT thread"); return -1; } if (pthread_attr_setscope (attributes, PTHREAD_SCOPE_SYSTEM)) { jack_error ("Cannot set scheduling scope for RT thread"); return -1; } memset (&rt_param, 0, sizeof (rt_param)); rt_param.sched_priority = client->engine->client_priority; if (pthread_attr_setschedparam (attributes, &rt_param)) { jack_error ("Cannot set scheduling priority for RT thread (%s)", strerror (errno)); return -1; } #if defined(__APPLE__) && defined(__POWERPC__) // To be implemented #else if (mlockall (MCL_CURRENT | MCL_FUTURE) != 0) { jack_error ("cannot lock down memory for RT thread (%s)", strerror (errno)); return -1; } #endif } if (pthread_create (&client->thread, attributes, jack_client_thread, client)) { #ifdef USE_CAPABILITIES if (client->engine->real_time && client->engine->has_capabilities) { /* we are probably dealing with a broken glibc so try to work around the bug, see below for more details */ goto capabilities_workaround; } #endif return -1; } #if defined(__APPLE__) && defined(__POWERPC__) /* a spcial real-time thread to call the "process" callback. It will communicate with the server using fast mach RPC mechanism */ if (pthread_create (&client->process_thread, attributes, jack_client_process_thread, client)) { jack_error("pthread_create failed for process_thread \n"); return -1; } if (client->engine->real_time){ /* time constraint thread */ setThreadToPriority(client->process_thread, 96, true, 10000000); }else{ /* fixed priority thread */ setThreadToPriority(client->process_thread, 63, true, 10000000); } #endif return 0; #ifdef USE_CAPABILITIES /* we get here only with engine running realtime and capabilities */ capabilities_workaround: /* the version of glibc I've played with has a bug that makes that code fail when running under a non-root user but with the proper realtime capabilities (in short, pthread_attr_setschedpolicy does not check for capabilities, only for the uid being zero). Newer versions apparently have this fixed. This workaround temporarily switches the client thread to the proper scheduler and priority, then starts the realtime thread so that it can inherit them and finally switches the client thread back to what it was before. Sigh. For ardour I have to check again and switch the thread explicitly to realtime, don't know why or how to debug - nando */ /* get current scheduler and parameters of the client process */ if ((policy = sched_getscheduler (0)) < 0) { jack_error ("Cannot get current client scheduler: %s", strerror(errno)); return -1; } memset (&client_param, 0, sizeof (client_param)); if (sched_getparam (0, &client_param)) { jack_error ("Cannot get current client scheduler parameters: %s", strerror(errno)); return -1; } /* temporarily change the client process to SCHED_FIFO so that the realtime thread can inherit the scheduler and priority */ memset (&temp_param, 0, sizeof (temp_param)); temp_param.sched_priority = client->engine->client_priority; if (sched_setscheduler(0, SCHED_FIFO, &temp_param)) { jack_error ("Cannot temporarily set client to RT scheduler: %s", strerror(errno)); return -1; } /* prepare the attributes for the realtime thread */ attributes = (pthread_attr_t *) malloc (sizeof (pthread_attr_t)); pthread_attr_init (attributes); if (pthread_attr_setscope (attributes, PTHREAD_SCOPE_SYSTEM)) { sched_setscheduler (0, policy, &client_param); jack_error ("Cannot set scheduling scope for RT thread"); return -1; } if (pthread_attr_setinheritsched (attributes, PTHREAD_INHERIT_SCHED)) { sched_setscheduler (0, policy, &client_param); jack_error ("Cannot set scheduler inherit policy for RT thread"); return -1; } /* create the RT thread */ if (pthread_create (&client->thread, attributes, jack_client_thread, client)) { sched_setscheduler (0, policy, &client_param); return -1; } /* return the client process to the scheduler it was in before */ if (sched_setscheduler (0, policy, &client_param)) { jack_error ("Cannot reset original client scheduler: %s", strerror(errno)); return -1; } /* check again... inheritance of policy and priority works in jack_simple_client but not in ardour! So I check again and force the policy if it is not set correctly. This does not really really work either, the manager thread of the linuxthreads implementation is left running with SCHED_OTHER, that is presumably very bad. */ memset (&client_param, 0, sizeof (client_param)); if (pthread_getschedparam(client->thread, &policy, &client_param) == 0) { if (policy != SCHED_FIFO) { /* jack_error ("RT thread did not go SCHED_FIFO, trying again"); */ memset (&client_param, 0, sizeof (client_param)); client_param.sched_priority = client->engine->client_priority; if (pthread_setschedparam (client->thread, SCHED_FIFO, &client_param)) { jack_error ("Cannot set (again) FIFO scheduling class for RT thread\n"); return -1; } } } return 0; #endif } int jack_activate (jack_client_t *client) { jack_request_t req; /* we need to scribble on our stack to ensure that its memory pages are * actually mapped (more important for mlockall(2) usage in * jack_start_thread()) */ #if defined(__APPLE__) && defined(__POWERPC__) #define BIG_ENOUGH_STACK 10000 // a bigger stack make the application crash... #else #define BIG_ENOUGH_STACK 1048576 #endif char buf[BIG_ENOUGH_STACK]; int i; for (i = 0; i < BIG_ENOUGH_STACK; i++) { buf[i] = (char) (i & 0xff); } #undef BIG_ENOUGH_STACK if (client->control->type == ClientInternal || client->control->type == ClientDriver) { goto startit; } /* get the pid of the client process to pass it to engine */ client->control->pid = getpid (); #ifdef USE_CAPABILITIES if (client->engine->has_capabilities != 0 && client->control->pid != 0 && client->engine->real_time != 0) { /* we need to ask the engine for realtime capabilities before trying to start the realtime thread */ req.type = SetClientCapabilities; req.x.client_id = client->control->id; jack_client_deliver_request (client, &req); if (req.status) { /* what to do? engine is running realtime, it is using capabilities and has them (otherwise we would not get an error return) but for some reason it could not give the client the required capabilities, so for now downgrade the client so that it still runs, albeit non-realtime - nando */ jack_error ("could not receive realtime capabilities, client will run non-realtime"); /* XXX wrong, this is a property of the engine client->engine->real_time = 0; */ } } #endif if (client->first_active) { pthread_mutex_init (&client_lock, NULL); pthread_cond_init (&client_ready, NULL); pthread_mutex_lock (&client_lock); if (jack_start_thread (client)) { pthread_mutex_unlock (&client_lock); return -1; } pthread_cond_wait (&client_ready, &client_lock); pthread_mutex_unlock (&client_lock); if (!client->thread_ok) { jack_error ("could not start client thread"); return -1; } client->first_active = FALSE; } startit: req.type = ActivateClient; req.x.client_id = client->control->id; return jack_client_deliver_request (client, &req); } int jack_deactivate (jack_client_t *client) { jack_request_t req; req.type = DeactivateClient; req.x.client_id = client->control->id; return jack_client_deliver_request (client, &req); } int jack_client_close (jack_client_t *client) { JSList *node; void *status; if (client->control->active) { jack_deactivate (client); } if (client->control->type == ClientExternal) { /* stop the thread that communicates with the jack server, only if it was actually running */ if (client->thread_ok){ pthread_cancel (client->thread); pthread_join (client->thread, &status); } munmap ((char *) client->control, sizeof (jack_client_control_t)); munmap ((char *) client->engine, sizeof (jack_control_t)); for (node = client->port_segments; node; node = jack_slist_next (node)) { jack_port_segment_info_t *si = (jack_port_segment_info_t *) node->data; munmap ((char *) si->address, si->size); free (node->data); } jack_slist_free (client->port_segments); if (client->graph_wait_fd) { close (client->graph_wait_fd); } if (client->graph_next_fd) { close (client->graph_next_fd); } close (client->event_fd); close (client->request_fd); } for (node = client->ports; node; node = jack_slist_next (node)) { free (node->data); } jack_slist_free (client->ports); jack_client_free (client); return 0; } int jack_is_realtime (jack_client_t *client) { return client->engine->real_time; } unsigned long jack_get_buffer_size (jack_client_t *client) { return client->engine->buffer_size; } int jack_connect (jack_client_t *client, const char *source_port, const char *destination_port) { jack_request_t req; req.type = ConnectPorts; snprintf (req.x.connect.source_port, sizeof (req.x.connect.source_port), "%s", source_port); snprintf (req.x.connect.destination_port, sizeof (req.x.connect.destination_port), "%s", destination_port); return jack_client_deliver_request (client, &req); } int jack_port_disconnect (jack_client_t *client, jack_port_t *port) { jack_request_t req; pthread_mutex_lock (&port->connection_lock); if (port->connections == NULL) { pthread_mutex_unlock (&port->connection_lock); return 0; } pthread_mutex_unlock (&port->connection_lock); req.type = DisconnectPort; req.x.port_info.port_id = port->shared->id; return jack_client_deliver_request (client, &req); } int jack_disconnect (jack_client_t *client, const char *source_port, const char *destination_port) { jack_request_t req; req.type = DisconnectPorts; snprintf (req.x.connect.source_port, sizeof (req.x.connect.source_port), "%s", source_port); snprintf (req.x.connect.destination_port, sizeof (req.x.connect.destination_port), "%s", destination_port); return jack_client_deliver_request (client, &req); } void jack_set_error_function (void (*func) (const char *)) { jack_error_callback = func; } int jack_set_graph_order_callback (jack_client_t *client, JackGraphOrderCallback callback, void *arg) { if (client->control->active) { jack_error ("You cannot set callbacks on an active client."); return -1; } client->control->graph_order = callback; client->control->graph_order_arg = arg; return 0; } int jack_set_xrun_callback (jack_client_t *client, JackXRunCallback callback, void *arg) { if (client->control->active) { jack_error ("You cannot set callbacks on an active client."); return -1; } client->control->xrun = callback; client->control->xrun_arg = arg; return 0; } int jack_set_process_callback (jack_client_t *client, JackProcessCallback callback, void *arg) { if (client->control->active) { jack_error ("You cannot set callbacks on an active client."); return -1; } client->control->process_arg = arg; client->control->process = callback; return 0; } int jack_set_buffer_size_callback (jack_client_t *client, JackBufferSizeCallback callback, void *arg) { client->control->bufsize_arg = arg; client->control->bufsize = callback; return 0; } int jack_set_port_registration_callback(jack_client_t *client, JackPortRegistrationCallback callback, void *arg) { if (client->control->active) { jack_error ("You cannot set callbacks on an active client."); return -1; } client->control->port_register_arg = arg; client->control->port_register = callback; return 0; } int jack_get_process_start_fd (jack_client_t *client) { /* once this has been called, the client thread does not sleep on the graph wait fd. */ client->pollmax = 1; return client->graph_wait_fd; } int jack_get_process_done_fd (jack_client_t *client) { return client->graph_next_fd; } void jack_on_shutdown (jack_client_t *client, void (*function)(void *arg), void *arg) { client->on_shutdown = function; client->on_shutdown_arg = arg; } const char ** jack_get_ports (jack_client_t *client, const char *port_name_pattern, const char *type_name_pattern, unsigned long flags) { jack_control_t *engine; const char **matching_ports; unsigned long match_cnt; jack_port_shared_t *psp; unsigned long i; regex_t port_regex; regex_t type_regex; int matching; engine = client->engine; if (port_name_pattern && port_name_pattern[0]) { regcomp (&port_regex, port_name_pattern, REG_EXTENDED|REG_NOSUB); } if (type_name_pattern && type_name_pattern[0]) { regcomp (&type_regex, type_name_pattern, REG_EXTENDED|REG_NOSUB); } psp = engine->ports; match_cnt = 0; matching_ports = (const char **) malloc (sizeof (char *) * engine->port_max); for (i = 0; i < engine->port_max; i++) { matching = 1; if (!psp[i].in_use) { continue; } if (flags) { if ((psp[i].flags & flags) != flags) { matching = 0; } } if (matching && port_name_pattern && port_name_pattern[0]) { if (regexec (&port_regex, psp[i].name, 0, NULL, 0)) { matching = 0; } } if (matching && type_name_pattern && type_name_pattern[0]) { if (regexec (&type_regex, psp[i].type_info.type_name, 0, NULL, 0)) { matching = 0; } } if (matching) { matching_ports[match_cnt++] = psp[i].name; } } matching_ports[match_cnt] = 0; if (match_cnt == 0) { free (matching_ports); matching_ports = 0; } return matching_ports; } float jack_cpu_load (jack_client_t *client) { return client->engine->cpu_load; } pthread_t jack_client_thread_id (jack_client_t *client) { return client->thread_id; } #if defined(__APPLE__) && defined(__POWERPC__) double __jack_time_ratio; void jack_init_time () { mach_timebase_info_data_t info; mach_timebase_info(&info); __jack_time_ratio = ((float)info.numer/info.denom) / 1000; } #else jack_time_t jack_get_mhz (void) { FILE *f = fopen("/proc/cpuinfo", "r"); if (f == 0) { perror("can't open /proc/cpuinfo\n"); exit(1); } for ( ; ; ) { jack_time_t mhz; int ret; char buf[1000]; if (fgets(buf, sizeof(buf), f) == NULL) { fprintf(stderr, "cannot locate cpu MHz in /proc/cpuinfo\n"); exit(1); } #ifdef __powerpc__ ret = sscanf(buf, "clock\t: %LuMHz", &mhz); #else ret = sscanf(buf, "cpu MHz : %Lu", &mhz); #endif /* __powerpc__ */ if (ret == 1) { fclose(f); return mhz; } } } jack_time_t __jack_cpu_mhz; void jack_init_time () { __jack_cpu_mhz = jack_get_mhz (); } #endif