diff options
Diffstat (limited to 'src/pulsecore/pdispatch.c')
| -rw-r--r-- | src/pulsecore/pdispatch.c | 348 |
1 files changed, 348 insertions, 0 deletions
diff --git a/src/pulsecore/pdispatch.c b/src/pulsecore/pdispatch.c new file mode 100644 index 00000000..bdd7cde1 --- /dev/null +++ b/src/pulsecore/pdispatch.c @@ -0,0 +1,348 @@ +/* $Id$ */ + +/*** + This file is part of PulseAudio. + + Copyright 2004-2006 Lennart Poettering + Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB + + PulseAudio 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. + + PulseAudio 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 PulseAudio; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <stdlib.h> + +#include <pulse/timeval.h> +#include <pulse/xmalloc.h> + +#include <pulsecore/native-common.h> +#include <pulsecore/llist.h> +#include <pulsecore/log.h> +#include <pulsecore/core-util.h> +#include <pulsecore/macro.h> +#include <pulsecore/refcnt.h> +#include <pulsecore/flist.h> + +#include "pdispatch.h" + +/*#define DEBUG_OPCODES */ + +#ifdef DEBUG_OPCODES + +static const char *command_names[PA_COMMAND_MAX] = { + [PA_COMMAND_ERROR] = "ERROR", + [PA_COMMAND_TIMEOUT] = "TIMEOUT", + [PA_COMMAND_REPLY] = "REPLY", + [PA_COMMAND_CREATE_PLAYBACK_STREAM] = "CREATE_PLAYBACK_STREAM", + [PA_COMMAND_DELETE_PLAYBACK_STREAM] = "DELETE_PLAYBACK_STREAM", + [PA_COMMAND_CREATE_RECORD_STREAM] = "CREATE_RECORD_STREAM", + [PA_COMMAND_DELETE_RECORD_STREAM] = "DELETE_RECORD_STREAM", + [PA_COMMAND_AUTH] = "AUTH", + [PA_COMMAND_REQUEST] = "REQUEST", + [PA_COMMAND_EXIT] = "EXIT", + [PA_COMMAND_SET_CLIENT_NAME] = "SET_CLIENT_NAME", + [PA_COMMAND_LOOKUP_SINK] = "LOOKUP_SINK", + [PA_COMMAND_LOOKUP_SOURCE] = "LOOKUP_SOURCE", + [PA_COMMAND_DRAIN_PLAYBACK_STREAM] = "DRAIN_PLAYBACK_STREAM", + [PA_COMMAND_PLAYBACK_STREAM_KILLED] = "PLAYBACK_STREAM_KILLED", + [PA_COMMAND_RECORD_STREAM_KILLED] = "RECORD_STREAM_KILLED", + [PA_COMMAND_STAT] = "STAT", + [PA_COMMAND_GET_PLAYBACK_LATENCY] = "PLAYBACK_LATENCY", + [PA_COMMAND_CREATE_UPLOAD_STREAM] = "CREATE_UPLOAD_STREAM", + [PA_COMMAND_DELETE_UPLOAD_STREAM] = "DELETE_UPLOAD_STREAM", + [PA_COMMAND_FINISH_UPLOAD_STREAM] = "FINISH_UPLOAD_STREAM", + [PA_COMMAND_PLAY_SAMPLE] = "PLAY_SAMPLE", + [PA_COMMAND_REMOVE_SAMPLE] = "REMOVE_SAMPLE", + [PA_COMMAND_GET_SERVER_INFO] = "GET_SERVER_INFO", + [PA_COMMAND_GET_SINK_INFO] = "GET_SINK_INFO", + [PA_COMMAND_GET_SINK_INFO_LIST] = "GET_SINK_INFO_LIST", + [PA_COMMAND_GET_SOURCE_INFO] = "GET_SOURCE_INFO", + [PA_COMMAND_GET_SOURCE_INFO_LIST] = "GET_SOURCE_INFO_LIST", + [PA_COMMAND_GET_MODULE_INFO] = "GET_MODULE_INFO", + [PA_COMMAND_GET_MODULE_INFO_LIST] = "GET_MODULE_INFO_LIST", + [PA_COMMAND_GET_CLIENT_INFO] = "GET_CLIENT_INFO", + [PA_COMMAND_GET_CLIENT_INFO_LIST] = "GET_CLIENT_INFO_LIST", + [PA_COMMAND_GET_SAMPLE_INFO] = "GET_SAMPLE_INFO", + [PA_COMMAND_GET_SAMPLE_INFO_LIST] = "GET_SAMPLE_INFO_LIST", + [PA_COMMAND_GET_SINK_INPUT_INFO] = "GET_SINK_INPUT_INFO", + [PA_COMMAND_GET_SINK_INPUT_INFO_LIST] = "GET_SINK_INPUT_INFO_LIST", + [PA_COMMAND_GET_SOURCE_OUTPUT_INFO] = "GET_SOURCE_OUTPUT_INFO", + [PA_COMMAND_GET_SOURCE_OUTPUT_INFO_LIST] = "GET_SOURCE_OUTPUT_INFO_LIST", + [PA_COMMAND_SUBSCRIBE] = "SUBSCRIBE", + [PA_COMMAND_SUBSCRIBE_EVENT] = "SUBSCRIBE_EVENT", + [PA_COMMAND_SET_SINK_VOLUME] = "SET_SINK_VOLUME", + [PA_COMMAND_SET_SINK_INPUT_VOLUME] = "SET_SINK_INPUT_VOLUME", + [PA_COMMAND_SET_SOURCE_VOLUME] = "SET_SOURCE_VOLME", + [PA_COMMAND_TRIGGER_PLAYBACK_STREAM] = "TRIGGER_PLAYBACK_STREAM", + [PA_COMMAND_FLUSH_PLAYBACK_STREAM] = "FLUSH_PLAYBACK_STREAM", + [PA_COMMAND_CORK_PLAYBACK_STREAM] = "CORK_PLAYBACK_STREAM", + [PA_COMMAND_GET_AUTOLOAD_INFO] = "GET_AUTOLOAD_INFO", + [PA_COMMAND_GET_AUTOLOAD_INFO_LIST] = "GET_AUTOLOAD_INFO_LIST", +}; + +#endif + +PA_STATIC_FLIST_DECLARE(reply_infos, 0, pa_xfree); + +struct reply_info { + pa_pdispatch *pdispatch; + PA_LLIST_FIELDS(struct reply_info); + pa_pdispatch_cb_t callback; + void *userdata; + pa_free_cb_t free_cb; + uint32_t tag; + pa_time_event *time_event; +}; + +struct pa_pdispatch { + PA_REFCNT_DECLARE; + pa_mainloop_api *mainloop; + const pa_pdispatch_cb_t *callback_table; + unsigned n_commands; + PA_LLIST_HEAD(struct reply_info, replies); + pa_pdispatch_drain_callback drain_callback; + void *drain_userdata; + const pa_creds *creds; +}; + +static void reply_info_free(struct reply_info *r) { + pa_assert(r); + pa_assert(r->pdispatch); + pa_assert(r->pdispatch->mainloop); + + if (r->time_event) + r->pdispatch->mainloop->time_free(r->time_event); + + PA_LLIST_REMOVE(struct reply_info, r->pdispatch->replies, r); + + if (pa_flist_push(PA_STATIC_FLIST_GET(reply_infos), r) < 0) + pa_xfree(r); +} + +pa_pdispatch* pa_pdispatch_new(pa_mainloop_api *mainloop, const pa_pdispatch_cb_t*table, unsigned entries) { + pa_pdispatch *pd; + pa_assert(mainloop); + + pa_assert((entries && table) || (!entries && !table)); + + pd = pa_xnew(pa_pdispatch, 1); + PA_REFCNT_INIT(pd); + pd->mainloop = mainloop; + pd->callback_table = table; + pd->n_commands = entries; + PA_LLIST_HEAD_INIT(struct reply_info, pd->replies); + pd->drain_callback = NULL; + pd->drain_userdata = NULL; + pd->creds = NULL; + + return pd; +} + +static void pdispatch_free(pa_pdispatch *pd) { + pa_assert(pd); + + while (pd->replies) { + if (pd->replies->free_cb) + pd->replies->free_cb(pd->replies->userdata); + + reply_info_free(pd->replies); + } + + pa_xfree(pd); +} + +static void run_action(pa_pdispatch *pd, struct reply_info *r, uint32_t command, pa_tagstruct *ts) { + pa_pdispatch_cb_t callback; + void *userdata; + uint32_t tag; + pa_assert(r); + + pa_pdispatch_ref(pd); + + callback = r->callback; + userdata = r->userdata; + tag = r->tag; + + reply_info_free(r); + + callback(pd, command, tag, ts, userdata); + + if (pd->drain_callback && !pa_pdispatch_is_pending(pd)) + pd->drain_callback(pd, pd->drain_userdata); + + pa_pdispatch_unref(pd); +} + +int pa_pdispatch_run(pa_pdispatch *pd, pa_packet*packet, const pa_creds *creds, void *userdata) { + uint32_t tag, command; + pa_tagstruct *ts = NULL; + int ret = -1; + + pa_assert(pd); + pa_assert(PA_REFCNT_VALUE(pd) >= 1); + pa_assert(packet); + pa_assert(PA_REFCNT_VALUE(packet) >= 1); + pa_assert(packet->data); + + pa_pdispatch_ref(pd); + + if (packet->length <= 8) + goto finish; + + ts = pa_tagstruct_new(packet->data, packet->length); + + if (pa_tagstruct_getu32(ts, &command) < 0 || + pa_tagstruct_getu32(ts, &tag) < 0) + goto finish; + +#ifdef DEBUG_OPCODES +{ + char t[256]; + char const *p; + if (!(p = command_names[command])) + pa_snprintf((char*) (p = t), sizeof(t), "%u", command); + + pa_log("Recieved opcode <%s>", p); +} +#endif + + pd->creds = creds; + + if (command == PA_COMMAND_ERROR || command == PA_COMMAND_REPLY) { + struct reply_info *r; + + for (r = pd->replies; r; r = r->next) + if (r->tag == tag) + break; + + if (r) + run_action(pd, r, command, ts); + + } else if (pd->callback_table && (command < pd->n_commands) && pd->callback_table[command]) { + const pa_pdispatch_cb_t *c = pd->callback_table+command; + + (*c)(pd, command, tag, ts, userdata); + } else { + pa_log("Recieved unsupported command %u", command); + goto finish; + } + + ret = 0; + +finish: + pd->creds = NULL; + + if (ts) + pa_tagstruct_free(ts); + + pa_pdispatch_unref(pd); + + return ret; +} + +static void timeout_callback(pa_mainloop_api*m, pa_time_event*e, PA_GCC_UNUSED const struct timeval *tv, void *userdata) { + struct reply_info*r = userdata; + + pa_assert(r); + pa_assert(r->time_event == e); + pa_assert(r->pdispatch); + pa_assert(r->pdispatch->mainloop == m); + pa_assert(r->callback); + + run_action(r->pdispatch, r, PA_COMMAND_TIMEOUT, NULL); +} + +void pa_pdispatch_register_reply(pa_pdispatch *pd, uint32_t tag, int timeout, pa_pdispatch_cb_t cb, void *userdata, pa_free_cb_t free_cb) { + struct reply_info *r; + struct timeval tv; + + pa_assert(pd); + pa_assert(PA_REFCNT_VALUE(pd) >= 1); + pa_assert(cb); + + if (!(r = pa_flist_pop(PA_STATIC_FLIST_GET(reply_infos)))) + r = pa_xnew(struct reply_info, 1); + + r->pdispatch = pd; + r->callback = cb; + r->userdata = userdata; + r->free_cb = free_cb; + r->tag = tag; + + pa_gettimeofday(&tv); + tv.tv_sec += timeout; + + pa_assert_se(r->time_event = pd->mainloop->time_new(pd->mainloop, &tv, timeout_callback, r)); + + PA_LLIST_PREPEND(struct reply_info, pd->replies, r); +} + +int pa_pdispatch_is_pending(pa_pdispatch *pd) { + pa_assert(pd); + pa_assert(PA_REFCNT_VALUE(pd) >= 1); + + return !!pd->replies; +} + +void pa_pdispatch_set_drain_callback(pa_pdispatch *pd, void (*cb)(pa_pdispatch *pd, void *userdata), void *userdata) { + pa_assert(pd); + pa_assert(PA_REFCNT_VALUE(pd) >= 1); + pa_assert(!cb || pa_pdispatch_is_pending(pd)); + + pd->drain_callback = cb; + pd->drain_userdata = userdata; +} + +void pa_pdispatch_unregister_reply(pa_pdispatch *pd, void *userdata) { + struct reply_info *r, *n; + + pa_assert(pd); + pa_assert(PA_REFCNT_VALUE(pd) >= 1); + + for (r = pd->replies; r; r = n) { + n = r->next; + + if (r->userdata == userdata) + reply_info_free(r); + } +} + +void pa_pdispatch_unref(pa_pdispatch *pd) { + pa_assert(pd); + pa_assert(PA_REFCNT_VALUE(pd) >= 1); + + if (PA_REFCNT_DEC(pd) <= 0) + pdispatch_free(pd); +} + +pa_pdispatch* pa_pdispatch_ref(pa_pdispatch *pd) { + pa_assert(pd); + pa_assert(PA_REFCNT_VALUE(pd) >= 1); + + PA_REFCNT_INC(pd); + return pd; +} + +const pa_creds * pa_pdispatch_creds(pa_pdispatch *pd) { + pa_assert(pd); + pa_assert(PA_REFCNT_VALUE(pd) >= 1); + + return pd->creds; +} |