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authorPierre Ossman <ossman@cendio.se>2006-02-16 19:19:58 +0000
committerPierre Ossman <ossman@cendio.se>2006-02-16 19:19:58 +0000
commite205b25d65ccb380fa158711e24d55b6de5d9bc1 (patch)
tree470b4ced153c9ff18b8e35deb05c7a95efc838fc /src/polypcore/module.c
parent5b881e62282f26b353635120935d114e0c7c3f3c (diff)
Reorganised the source tree. We now have src/ with a couple of subdirs:
* daemon/ - Contains the files specific to the polypaudio daemon. * modules/ - All loadable modules. * polyp/ - Files that are part of the public, application interface or are only used in libpolyp. * polypcore/ - All other shared files. * tests/ - Test programs. * utils/ - Utility programs. git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@487 fefdeb5f-60dc-0310-8127-8f9354f1896f
Diffstat (limited to 'src/polypcore/module.c')
-rw-r--r--src/polypcore/module.c275
1 files changed, 275 insertions, 0 deletions
diff --git a/src/polypcore/module.c b/src/polypcore/module.c
new file mode 100644
index 00000000..499ea299
--- /dev/null
+++ b/src/polypcore/module.c
@@ -0,0 +1,275 @@
+/* $Id$ */
+
+/***
+ This file is part of polypaudio.
+
+ polypaudio 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 of the License,
+ or (at your option) any later version.
+
+ polypaudio 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 Lesser General Public License
+ along with polypaudio; 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 <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <errno.h>
+
+#include "module.h"
+#include "xmalloc.h"
+#include "subscribe.h"
+#include "log.h"
+#include "util.h"
+
+#define PA_SYMBOL_INIT "pa__init"
+#define PA_SYMBOL_DONE "pa__done"
+
+#define UNLOAD_POLL_TIME 2
+
+static void timeout_callback(pa_mainloop_api *m, pa_time_event*e, PA_GCC_UNUSED const struct timeval *tv, void *userdata) {
+ pa_core *c = userdata;
+ struct timeval ntv;
+ assert(c && c->mainloop == m && c->module_auto_unload_event == e);
+
+ pa_module_unload_unused(c);
+
+ pa_gettimeofday(&ntv);
+ ntv.tv_sec += UNLOAD_POLL_TIME;
+ m->time_restart(e, &ntv);
+}
+
+pa_module* pa_module_load(pa_core *c, const char *name, const char *argument) {
+ pa_module *m = NULL;
+ int r;
+
+ assert(c && name);
+
+ if (c->disallow_module_loading)
+ goto fail;
+
+ m = pa_xmalloc(sizeof(pa_module));
+
+ m->name = pa_xstrdup(name);
+ m->argument = pa_xstrdup(argument);
+
+ if (!(m->dl = lt_dlopenext(name))) {
+ pa_log(__FILE__": Failed to open module \"%s\": %s\n", name, lt_dlerror());
+ goto fail;
+ }
+
+ if (!(m->init = (int (*)(pa_core *_c, pa_module*_m)) lt_dlsym(m->dl, PA_SYMBOL_INIT))) {
+ pa_log(__FILE__": Failed to load module \"%s\": symbol \""PA_SYMBOL_INIT"\" not found.\n", name);
+ goto fail;
+ }
+
+ if (!(m->done = (void (*)(pa_core *_c, pa_module*_m)) lt_dlsym(m->dl, PA_SYMBOL_DONE))) {
+ pa_log(__FILE__": Failed to load module \"%s\": symbol \""PA_SYMBOL_DONE"\" not found.\n", name);
+ goto fail;
+ }
+
+ m->userdata = NULL;
+ m->core = c;
+ m->n_used = -1;
+ m->auto_unload = 0;
+ m->unload_requested = 0;
+
+ assert(m->init);
+ if (m->init(c, m) < 0) {
+ pa_log_error(__FILE__": Failed to load module \"%s\" (argument: \"%s\"): initialization failed.\n", name, argument ? argument : "");
+ goto fail;
+ }
+
+ if (!c->modules)
+ c->modules = pa_idxset_new(NULL, NULL);
+
+ if (!c->module_auto_unload_event) {
+ struct timeval ntv;
+ pa_gettimeofday(&ntv);
+ ntv.tv_sec += UNLOAD_POLL_TIME;
+ c->module_auto_unload_event = c->mainloop->time_new(c->mainloop, &ntv, timeout_callback, c);
+ }
+ assert(c->module_auto_unload_event);
+
+ assert(c->modules);
+ r = pa_idxset_put(c->modules, m, &m->index);
+ assert(r >= 0 && m->index != PA_IDXSET_INVALID);
+
+ pa_log_info(__FILE__": Loaded \"%s\" (index: #%u; argument: \"%s\").\n", m->name, m->index, m->argument ? m->argument : "");
+
+ pa_subscription_post(c, PA_SUBSCRIPTION_EVENT_MODULE|PA_SUBSCRIPTION_EVENT_NEW, m->index);
+
+ return m;
+
+fail:
+
+ if (m) {
+ pa_xfree(m->argument);
+ pa_xfree(m->name);
+
+ if (m->dl)
+ lt_dlclose(m->dl);
+
+ pa_xfree(m);
+ }
+
+ return NULL;
+}
+
+static void pa_module_free(pa_module *m) {
+ assert(m && m->done && m->core);
+
+ if (m->core->disallow_module_loading)
+ return;
+
+ pa_log_info(__FILE__": Unloading \"%s\" (index: #%u).\n", m->name, m->index);
+
+ m->done(m->core, m);
+
+ lt_dlclose(m->dl);
+
+ pa_log_info(__FILE__": Unloaded \"%s\" (index: #%u).\n", m->name, m->index);
+
+ pa_subscription_post(m->core, PA_SUBSCRIPTION_EVENT_MODULE|PA_SUBSCRIPTION_EVENT_REMOVE, m->index);
+
+ pa_xfree(m->name);
+ pa_xfree(m->argument);
+ pa_xfree(m);
+}
+
+void pa_module_unload(pa_core *c, pa_module *m) {
+ assert(c && m);
+
+ assert(c->modules);
+ if (!(m = pa_idxset_remove_by_data(c->modules, m, NULL)))
+ return;
+
+ pa_module_free(m);
+}
+
+void pa_module_unload_by_index(pa_core *c, uint32_t idx) {
+ pa_module *m;
+ assert(c && idx != PA_IDXSET_INVALID);
+
+ assert(c->modules);
+ if (!(m = pa_idxset_remove_by_index(c->modules, idx)))
+ return;
+
+ pa_module_free(m);
+}
+
+static void free_callback(void *p, PA_GCC_UNUSED void *userdata) {
+ pa_module *m = p;
+ assert(m);
+ pa_module_free(m);
+}
+
+void pa_module_unload_all(pa_core *c) {
+ assert(c);
+
+ if (!c->modules)
+ return;
+
+ pa_idxset_free(c->modules, free_callback, NULL);
+ c->modules = NULL;
+
+ if (c->module_auto_unload_event) {
+ c->mainloop->time_free(c->module_auto_unload_event);
+ c->module_auto_unload_event = NULL;
+ }
+
+ if (c->module_defer_unload_event) {
+ c->mainloop->defer_free(c->module_defer_unload_event);
+ c->module_defer_unload_event = NULL;
+ }
+}
+
+static int unused_callback(void *p, PA_GCC_UNUSED uint32_t idx, int *del, void *userdata) {
+ pa_module *m = p;
+ time_t *now = userdata;
+ assert(p && del && now);
+
+ if (m->n_used == 0 && m->auto_unload && m->last_used_time+m->core->module_idle_time <= *now) {
+ pa_module_free(m);
+ *del = 1;
+ }
+
+ return 0;
+}
+
+void pa_module_unload_unused(pa_core *c) {
+ time_t now;
+ assert(c);
+
+ if (!c->modules)
+ return;
+
+ time(&now);
+ pa_idxset_foreach(c->modules, unused_callback, &now);
+}
+
+static int unload_callback(void *p, PA_GCC_UNUSED uint32_t idx, int *del, PA_GCC_UNUSED void *userdata) {
+ pa_module *m = p;
+ assert(m);
+
+ if (m->unload_requested) {
+ pa_module_free(m);
+ *del = 1;
+ }
+
+ return 0;
+}
+
+static void defer_cb(pa_mainloop_api*api, pa_defer_event *e, void *userdata) {
+ pa_core *core = userdata;
+ api->defer_enable(e, 0);
+
+ if (!core->modules)
+ return;
+
+ pa_idxset_foreach(core->modules, unload_callback, NULL);
+
+}
+
+void pa_module_unload_request(pa_module *m) {
+ assert(m);
+
+ m->unload_requested = 1;
+
+ if (!m->core->module_defer_unload_event)
+ m->core->module_defer_unload_event = m->core->mainloop->defer_new(m->core->mainloop, defer_cb, m->core);
+
+ m->core->mainloop->defer_enable(m->core->module_defer_unload_event, 1);
+}
+
+void pa_module_set_used(pa_module*m, int used) {
+ assert(m);
+
+ if (m->n_used != used)
+ pa_subscription_post(m->core, PA_SUBSCRIPTION_EVENT_MODULE|PA_SUBSCRIPTION_EVENT_CHANGE, m->index);
+
+ if (m->n_used != used && used == 0)
+ time(&m->last_used_time);
+
+ m->n_used = used;
+}
+
+pa_modinfo *pa_module_get_info(pa_module *m) {
+ assert(m);
+
+ return pa_modinfo_get_by_handle(m->dl);
+}