rename src to polyp

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@90 fefdeb5f-60dc-0310-8127-8f9354f1896f

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);
+}