mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-03 09:01:50 -05:00
fa499dad06
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@284 fefdeb5f-60dc-0310-8127-8f9354f1896f
274 lines
7 KiB
C
274 lines
7 KiB
C
/* $Id$ */
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/***
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This file is part of polypaudio.
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polypaudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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polypaudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with polypaudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <string.h>
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#include <errno.h>
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#include "module.h"
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#include "xmalloc.h"
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#include "subscribe.h"
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#include "log.h"
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#define PA_SYMBOL_INIT "pa__init"
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#define PA_SYMBOL_DONE "pa__done"
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#define UNLOAD_POLL_TIME 2
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static void timeout_callback(struct pa_mainloop_api *m, struct pa_time_event*e, const struct timeval *tv, void *userdata) {
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struct pa_core *c = userdata;
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struct timeval ntv;
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assert(c && c->mainloop == m && c->module_auto_unload_event == e);
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pa_module_unload_unused(c);
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gettimeofday(&ntv, NULL);
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ntv.tv_sec += UNLOAD_POLL_TIME;
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m->time_restart(e, &ntv);
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}
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struct pa_module* pa_module_load(struct pa_core *c, const char *name, const char *argument) {
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struct pa_module *m = NULL;
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int r;
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assert(c && name);
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if (c->disallow_module_loading)
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goto fail;
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m = pa_xmalloc(sizeof(struct pa_module));
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m->name = pa_xstrdup(name);
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m->argument = pa_xstrdup(argument);
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if (!(m->dl = lt_dlopenext(name))) {
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pa_log(__FILE__": Failed to open module \"%s\": %s\n", name, lt_dlerror());
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goto fail;
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}
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if (!(m->init = (int (*)(struct pa_core *c, struct pa_module*m)) lt_dlsym(m->dl, PA_SYMBOL_INIT))) {
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pa_log(__FILE__": Failed to load module \"%s\": symbol \""PA_SYMBOL_INIT"\" not found.\n", name);
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goto fail;
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}
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if (!(m->done = (void (*)(struct pa_core *c, struct pa_module*m)) lt_dlsym(m->dl, PA_SYMBOL_DONE))) {
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pa_log(__FILE__": Failed to load module \"%s\": symbol \""PA_SYMBOL_DONE"\" not found.\n", name);
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goto fail;
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}
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m->userdata = NULL;
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m->core = c;
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m->n_used = -1;
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m->auto_unload = 0;
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m->unload_requested = 0;
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assert(m->init);
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if (m->init(c, m) < 0) {
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pa_log(__FILE__": Failed to load module \"%s\" (argument: \"%s\"): initialization failed.\n", name, argument ? argument : "");
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goto fail;
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}
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if (!c->modules)
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c->modules = pa_idxset_new(NULL, NULL);
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if (!c->module_auto_unload_event) {
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struct timeval ntv;
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gettimeofday(&ntv, NULL);
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ntv.tv_sec += UNLOAD_POLL_TIME;
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c->module_auto_unload_event = c->mainloop->time_new(c->mainloop, &ntv, timeout_callback, c);
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}
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assert(c->module_auto_unload_event);
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assert(c->modules);
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r = pa_idxset_put(c->modules, m, &m->index);
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assert(r >= 0 && m->index != PA_IDXSET_INVALID);
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pa_log(__FILE__": Loaded \"%s\" (index: #%u; argument: \"%s\").\n", m->name, m->index, m->argument ? m->argument : "");
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pa_subscription_post(c, PA_SUBSCRIPTION_EVENT_MODULE|PA_SUBSCRIPTION_EVENT_NEW, m->index);
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return m;
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fail:
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if (m) {
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pa_xfree(m->argument);
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pa_xfree(m->name);
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if (m->dl)
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lt_dlclose(m->dl);
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pa_xfree(m);
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}
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return NULL;
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}
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static void pa_module_free(struct pa_module *m) {
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assert(m && m->done && m->core);
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if (m->core->disallow_module_loading)
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return;
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pa_log(__FILE__": Unloading \"%s\" (index: #%u).\n", m->name, m->index);
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m->done(m->core, m);
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lt_dlclose(m->dl);
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pa_log(__FILE__": Unloaded \"%s\" (index: #%u).\n", m->name, m->index);
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pa_subscription_post(m->core, PA_SUBSCRIPTION_EVENT_MODULE|PA_SUBSCRIPTION_EVENT_REMOVE, m->index);
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pa_xfree(m->name);
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pa_xfree(m->argument);
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pa_xfree(m);
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}
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void pa_module_unload(struct pa_core *c, struct pa_module *m) {
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assert(c && m);
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assert(c->modules);
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if (!(m = pa_idxset_remove_by_data(c->modules, m, NULL)))
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return;
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pa_module_free(m);
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}
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void pa_module_unload_by_index(struct pa_core *c, uint32_t index) {
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struct pa_module *m;
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assert(c && index != PA_IDXSET_INVALID);
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assert(c->modules);
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if (!(m = pa_idxset_remove_by_index(c->modules, index)))
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return;
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pa_module_free(m);
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}
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static void free_callback(void *p, void *userdata) {
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struct pa_module *m = p;
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assert(m);
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pa_module_free(m);
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}
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void pa_module_unload_all(struct pa_core *c) {
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assert(c);
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if (!c->modules)
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return;
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pa_idxset_free(c->modules, free_callback, NULL);
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c->modules = NULL;
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if (c->module_auto_unload_event) {
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c->mainloop->time_free(c->module_auto_unload_event);
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c->module_auto_unload_event = NULL;
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}
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if (c->module_defer_unload_event) {
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c->mainloop->defer_free(c->module_defer_unload_event);
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c->module_defer_unload_event = NULL;
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}
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}
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static int unused_callback(void *p, uint32_t index, int *del, void *userdata) {
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struct pa_module *m = p;
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time_t *now = userdata;
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assert(p && del && now);
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if (m->n_used == 0 && m->auto_unload && m->last_used_time+m->core->module_idle_time <= *now) {
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pa_module_free(m);
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*del = 1;
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}
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return 0;
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}
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void pa_module_unload_unused(struct pa_core *c) {
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time_t now;
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assert(c);
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if (!c->modules)
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return;
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time(&now);
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pa_idxset_foreach(c->modules, unused_callback, &now);
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}
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static int unload_callback(void *p, uint32_t index, int *del, void *userdata) {
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struct pa_module *m = p;
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assert(m);
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if (m->unload_requested) {
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pa_module_free(m);
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*del = 1;
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}
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return 0;
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}
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static void defer_cb(struct pa_mainloop_api*api, struct pa_defer_event *e, void *userdata) {
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struct pa_core *core = userdata;
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api->defer_enable(e, 0);
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if (!core->modules)
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return;
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pa_idxset_foreach(core->modules, unload_callback, NULL);
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}
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void pa_module_unload_request(struct pa_module *m) {
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assert(m);
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m->unload_requested = 1;
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if (!m->core->module_defer_unload_event)
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m->core->module_defer_unload_event = m->core->mainloop->defer_new(m->core->mainloop, defer_cb, m->core);
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m->core->mainloop->defer_enable(m->core->module_defer_unload_event, 1);
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}
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void pa_module_set_used(struct pa_module*m, int used) {
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assert(m);
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if (m->n_used != used)
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pa_subscription_post(m->core, PA_SUBSCRIPTION_EVENT_MODULE|PA_SUBSCRIPTION_EVENT_CHANGE, m->index);
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if (m->n_used != used && used == 0)
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time(&m->last_used_time);
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m->n_used = used;
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}
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struct pa_modinfo *pa_module_get_info(struct pa_module *m) {
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assert(m);
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return pa_modinfo_get_by_handle(m->dl);
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}
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