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-rw-r--r--polyp/module.c161
1 files changed, 161 insertions, 0 deletions
diff --git a/polyp/module.c b/polyp/module.c
new file mode 100644
index 00000000..5c6f0fb6
--- /dev/null
+++ b/polyp/module.c
@@ -0,0 +1,161 @@
+/* $Id$ */
+
+/***
+ This file is part of polypaudio.
+
+ polypaudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU 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 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"
+
+struct pa_module* pa_module_load(struct pa_core *c, const char *name, const char *argument) {
+ struct pa_module *m = NULL;
+ int r;
+
+ assert(c && name);
+
+ m = malloc(sizeof(struct pa_module));
+ assert(m);
+
+ m->name = strdup(name);
+ m->argument = argument ? strdup(argument) : NULL;
+
+ if (!(m->dl = lt_dlopenext(name)))
+ goto fail;
+
+ if (!(m->init = lt_dlsym(m->dl, "pa_module_init")))
+ goto fail;
+
+ if (!(m->done = lt_dlsym(m->dl, "pa_module_done")))
+ goto fail;
+
+ m->userdata = NULL;
+ m->core = c;
+
+ assert(m->init);
+ if (m->init(c, m) < 0)
+ goto fail;
+
+ if (!c->modules)
+ c->modules = pa_idxset_new(NULL, NULL);
+
+ assert(c->modules);
+ r = pa_idxset_put(c->modules, m, &m->index);
+ assert(r >= 0 && m->index != PA_IDXSET_INVALID);
+
+ fprintf(stderr, "module: loaded %u \"%s\" with argument \"%s\".\n", m->index, m->name, m->argument);
+
+ return m;
+
+fail:
+ if (m) {
+ free(m->argument);
+ free(m->name);
+
+ if (m->dl)
+ lt_dlclose(m->dl);
+
+ free(m);
+ }
+
+ return NULL;
+}
+
+static void pa_module_free(struct pa_module *m) {
+ assert(m && m->done && m->core);
+ m->done(m->core, m);
+
+ lt_dlclose(m->dl);
+
+ fprintf(stderr, "module: unloaded %u \"%s\".\n", m->index, m->name);
+
+ free(m->name);
+ free(m->argument);
+ free(m);
+}
+
+
+void pa_module_unload(struct pa_core *c, struct 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(struct pa_core *c, uint32_t index) {
+ struct pa_module *m;
+ assert(c && index != PA_IDXSET_INVALID);
+
+ assert(c->modules);
+ if (!(m = pa_idxset_remove_by_index(c->modules, index)))
+ return;
+
+ pa_module_free(m);
+}
+
+static void free_callback(void *p, void *userdata) {
+ struct pa_module *m = p;
+ assert(m);
+ pa_module_free(m);
+}
+
+void pa_module_unload_all(struct pa_core *c) {
+ assert(c);
+
+ if (!c->modules)
+ return;
+
+ pa_idxset_free(c->modules, free_callback, NULL);
+ c->modules = NULL;
+}
+
+struct once_info {
+ struct pa_core *core;
+ uint32_t index;
+};
+
+
+static void module_unload_once_callback(void *userdata) {
+ struct once_info *i = userdata;
+ assert(i);
+ pa_module_unload_by_index(i->core, i->index);
+ free(i);
+}
+
+void pa_module_unload_request(struct pa_core *c, struct pa_module *m) {
+ struct once_info *i;
+ assert(c && m);
+
+ i = malloc(sizeof(struct once_info));
+ assert(i);
+ i->core = c;
+ i->index = m->index;
+ pa_mainloop_api_once(c->mainloop, module_unload_once_callback, i);
+}