1 files changed, 138 insertions, 0 deletions
diff --git a/src/pulsecore/shared.c b/src/pulsecore/shared.c
new file mode 100644
index 00000000..77d919d3
--- /dev/null
+++ b/src/pulsecore/shared.c
@@ -0,0 +1,138 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+
+  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 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
+  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 <pulse/xmalloc.h>
+#include <pulsecore/log.h>
+#include <pulsecore/macro.h>
+
+#include "shared.h"
+
+typedef struct pa_shared {
+    char *name;  /* Points to memory allocated by the shared property system */
+    void *data;  /* Points to memory maintained by the caller */
+} pa_shared;
+
+/* Allocate a new shared property object */
+static pa_shared* shared_new(const char *name, void *data) {
+    pa_shared* p;
+
+    pa_assert(name);
+    pa_assert(data);
+
+    p = pa_xnew(pa_shared, 1);
+    p->name = pa_xstrdup(name);
+    p->data = data;
+
+    return p;
+}
+
+/* Free a shared property object */
+static void shared_free(pa_shared *p) {
+    pa_assert(p);
+
+    pa_xfree(p->name);
+    pa_xfree(p);
+}
+
+void* pa_shared_get(pa_core *c, const char *name) {
+    pa_shared *p;
+
+    pa_assert(c);
+    pa_assert(name);
+    pa_assert(c->shared);
+
+    if (!(p = pa_hashmap_get(c->shared, name)))
+        return NULL;
+
+    return p->data;
+}
+
+int pa_shared_set(pa_core *c, const char *name, void *data) {
+    pa_shared *p;
+
+    pa_assert(c);
+    pa_assert(name);
+    pa_assert(data);
+    pa_assert(c->shared);
+
+    if (pa_hashmap_get(c->shared, name))
+        return -1;
+
+    p = shared_new(name, data);
+    pa_hashmap_put(c->shared, p->name, p);
+    return 0;
+}
+
+int pa_shared_remove(pa_core *c, const char *name) {
+    pa_shared *p;
+
+    pa_assert(c);
+    pa_assert(name);
+    pa_assert(c->shared);
+
+    if (!(p = pa_hashmap_remove(c->shared, name)))
+        return -1;
+
+    shared_free(p);
+    return 0;
+}
+
+void pa_shared_init(pa_core *c) {
+    pa_assert(c);
+
+    c->shared = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
+}
+
+void pa_shared_cleanup(pa_core *c) {
+    pa_assert(c);
+
+    if (!c->shared)
+        return;
+
+    pa_assert(pa_hashmap_isempty(c->shared));
+
+    pa_hashmap_free(c->shared, NULL, NULL);
+    c->shared = NULL;
+
+}
+
+void pa_shared_dump(pa_core *c, pa_strbuf *s) {
+    void *state = NULL;
+    pa_shared *p;
+
+    pa_assert(c);
+    pa_assert(s);
+
+    while ((p = pa_hashmap_iterate(c->shared, &state, NULL)))
+        pa_strbuf_printf(s, "[%s] -> [%p]\n", p->name, p->data);
+}
+
+int pa_shared_replace(pa_core *c, const char *name, void *data) {
+    pa_assert(c);
+    pa_assert(name);
+
+    pa_shared_remove(c, name);
+    return pa_shared_set(c, name, data);
+}